1889 problem(s) found in 1094 milliseconds (displaying 100 problem(s)).

1 - P0000503
Thomas R. Dawson
Hans Gruber

The Chess Amateur 11/1926
besondere ehrende Erwähnung
P0000503
(0+0)
#1
5x5x5-Raumschach
W: KAe1, LBb2, LEe1, SCa1, BAb2, Ac2, Ad3, Ae2, Be2, De2, Ed2, Ee3 (12);
S: KAc1, TEe2 (2)
Verbesserung von H. Gruber
Sally: 1. SCa1-Cc2#?! Aber Schwarz hat keinen letzten Zug!? Also
1...- TEe2xEe1#?! Aber der Clou ist, dass Schwarz doch einen
(eindeutigen) letzten Zug hat: 1...- KBb1xTAc1!! (davor :
2. TCcc1(x)Ac1+!)Also doch Matt durch Weiss mit !.SCa1-Cc2#
S. 179 Schwalbe Dez. 1980. (2012-2-21)
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comment
Keywords: Space Chess
Genre: Retro, Fairies
Reprints: 3102 Die Schwalbe 62 04/1980
Input: Gerd Wilts, 1995-6-3
Last update: Alfred Pfeiffer, 2015-5-19 more...
2 - P0000945
Albrecht Brandis
Hugo August
Niels Høeg
Thomas R. Dawson
Valerian Onitiu

Skakbladet 1924
P0000945
(7+1)
Letzter Zug?
R: 1. Ka2xTa1
play all play one stop play next play all
more ...
comment
Keywords: Last Move? (KxT), Type A, Economy record
Genre: Retro
Reprints: A8a Length Records in Last Single Moves? , p. 4, 11/2009
Input: Gerd Wilts, 1995-6-3
Last update: A.Buchanan, 2018-8-25 more...
3 - P0000965
Thomas R. Dawson
(86.) The Fairy Chess Review 7, p. 78, 08/1937
P0000965
(3+8)
Letzter Zug?
R: 1. b6xLa7
play all play one stop play next play all
Henrik Juel: A possible retroplay is
-1.b6xLa7 Lb8 -2.a5xSb6 Sd5xSb6 -3.Sc4,
then extract the kings via b6, etc. (2018-4-2)
comment
Keywords: Type A, Last Move? (BxL), Economy record, Type B (a fortiori)
Genre: Retro
Reprints: A/30 feenschach 159, p. 78, 04-06/2005
Input: Gerd Wilts, 1995-6-3
Last update: Alfred Pfeiffer, 2018-4-3 more...
4 - P0000971
Hugo August
Otto Brennert
Thomas R. Dawson
Niels Høeg
Valerian Onitiu

2) Skakbladet 08/1924
P0000971
(4+3)
Letzter Zug?
R: 1. Kb4xSa3
play all play one stop play next play all
Keywords: Type A, Last Move? (KxS), Economy record, Length Record
Genre: Retro
Reprints: A07a Phénix 282, p. 11060, 02/2018
Input: Gerd Wilts, 1995-6-3
Last update: A.Buchanan, 2018-8-26 more...
5 - P0000972
Vilhelm Röpke
Albrecht Brandis
Hugo August
Thomas R. Dawson
Richard Steinweg
Hugo Rohr
Valerian Onitiu

1) Skakbladet 08/1924
P0000972
(6+1)
Letzter Zug?
R: 1. Kd1xSc1
play all play one stop play next play all
Henrik Juel: This position was actually submitted by V. Røpke only, according to the comment by tournament director Niels Høeg (p.88); the other authors had a black DTL on a1, but Høeg liked this position best, and it is the most well-known from the tourney
V. Røpke was an actuary and the strongest Danish solver for many years, and he never used his first name, so in talk others did not either, but called him Røpke; I was 15 when I met him, so I called him Mr. Røpke... (2018-4-2)
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comment
Keywords: Last Move? (KxS), Type A, Economy record, Length Record
Genre: Retro
Reprints: Rund um das Schachbrett 1955
385 Arbeiter-Zeitung (Wien) 05/04/1959
RA17 diagrammes 16 08/1975
A7b Length Records in Last Single Moves? , p. 4, 11/2009
1429 Problemskak 30, p. 20, 04-06/2015
A07b Phénix 282, p. 11060, 02/2018
A07b Phénix 282, p. 11060, 02/2018
Input: Gerd Wilts, 1995-6-3
Last update: A.Buchanan, 2018-8-26 more...
6 - P0000977
Hugo August
Albrecht Brandis
Thomas R. Dawson

14) Skakbladet 08/1924
P0000977
(5+3)
Letzter Zug?
R: 1. Sd3xSc1
play all play one stop play next play all
Keywords: Type A, Last Move? (SxS), Economy record, Type B (a fortiori)
Genre: Retro
Input: Gerd Wilts, 1995-6-3
Last update: Frank Müller, 2013-12-27 more...
7 - P0000979
Thomas R. Dawson
The Fairy Chess Review 1937
P0000979
(3+7)
Letzter Zug?
R: 1. Bb6xSa7
play all play one stop play next play all
Keywords: Type A, Last Move? (BxS)
Genre: Retro
Input: Gerd Wilts, 1995-6-3
Last update: A.Buchanan, 2012-4-29 more...
8 - P0001001
Thomas R. Dawson
The Fairy Chess Review 1937
P0001001
(11+2)
Letzter Zug?
R: 1. 0-0-0
play all play one stop play next play all
Sally: Aus der Anordnung der w. Bauern und des Umwandlungsläufers auf a8 ergibt sich , dass Weiß zuletzt nichtvgeschlagen haben kann. Vor jedem anderen weißen Zug wäre Schwarz retro-
patt. S. 37, Nr. 1: Schach ohne Grenzen (Fabel & Kemp 1969) (2012-2-21)
comment
Keywords: Type A, Last Move? (0-0-0), Castling (wg)
Genre: Retro
Reprints: A/55 feenschach 159 04-06/2005
Input: Gerd Wilts, 1995-6-3
Last update: A.Buchanan, 2012-4-29 more...
9 - P0001002
Thomas R. Dawson
The Fairy Chess Review 1937
P0001002
(11+2)
Letzter Zug?
R: 1. 0-0
play all play one stop play next play all
Keywords: Type A, Last Move? (0-0), Castling (wk)
Genre: Retro
Input: Gerd Wilts, 1995-6-3
Last update: A.Buchanan, 2012-4-29 more...
10 - P0001008
Thomas R. Dawson
F39 Skakbladet 08/1924
P0001008
(2+1) C+
Welches war der letzte Zug?
Schwarz am Zug
R: 1. a6-a7
play all play one stop play next play all
Ursprünglich als Frage formuliert, die Stellung wurde erst in 10/1924 angegeben.
Keywords: Type B, Last Move? (B-), Economy record, Length Record, Rex solus (s), Kindergarten Problem
Genre: Retro
Computer test: RSP 1.2
Reprints: B/27 feenschach 159 04-06/2005
B3 Length Records in Last Single Moves? , p. 7, 11/2009
B03 Phénix 282, p. 11063, 02/2018
Input: Gerd Wilts, 1995-6-3
Last update: A.Buchanan, 2018-8-26 more...
11 - P0001179
Thomas R. Dawson
v Bolton Football Field 07/09/1912
P0001179
(14+11)
#3
Die wB auf der b-Linie haben viermal geschlagen, der sLc8 wurde auf c8 geschlagen. Also muß sich der sBg auf h1 umgewandelt haben, so daß die weiße 0-0 nicht möglich ist. Da sich der sBa auf a1 umgewandelt haben muß, ist die weiße 0-0-0 ebenfalls nicht möglich. Ferner muß sich der wBe auf e8 umgewandelt haben, so daß die schwarzen Rochaden nicht möglich sind.
1. Kf1!
play all play one stop play next play all
Keywords: Cant Castler, Castling (wkwgsksg)
Genre: Retro
Reprints: 45B Retrograde Analysis 1915
52 Europe Echecs 32 04/1961
Input: Gerd Wilts, 1995-6-3
Last update: Gerd Wilts, 2001-2-15 more...
12 - P0001306
Thomas R. Dawson
Falkirk Herald 17/06/1914
P0001306
(11+6)
#2
1. gxf6ep
play all play one stop play next play all

Duplicate Diagram: P1226354

in UT und Mat Plus spiegelverkehrt, ebenso in AA
hpr: Im Original erschien die Aufgabe spiegelverkehrt, wie Paul Valois im Original nachgesehen hat. Insofern dürfte die Aufgabe HIER falsch wiedergegeben sein. (2011-12-4)
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comment
Keywords: En passant, En passant as key, Symmetrical position
Genre: Retro
Reprints: 61B Retrograde Analysis 1915
35 Ultimate Themes 1938
22 Al Hamishmar 22/11/1945
178 Europe Echecs 104-105 10/1967
3 Chess unlimited 1969
212 FIDE Album 1914-1944/III 1975
84a 100 Classics of the Chessboard 1983
(49) Mat Plus 12 10-12/2009
1149 Augsburger Allgemeine 05/03/2011
H1 ASymmetrie 2013
Input: Gerd Wilts, 1995-6-3
Last update: Mario Richter, 2015-4-22 more...
13 - P0001326
Thomas R. Dawson
51 Retrograde Analysis 1915
P0001326
(14+14)
#2
Um die Stellung aufzulösen, muß sich der sTh8 auf h1 entwandeln, also ist der sTh8 eine UWF.
1. Da7! 0-0?
play all play one stop play next play all
Keywords: Cant Castler, Castling (sk)
Genre: Retro
Reprints: 198 Europe Echecs 115 08/1968
Input: Gerd Wilts, 1995-6-3
Last update: Gerd Wilts, 2001-2-15 more...
14 - P0001339
Thomas R. Dawson
390/1 Magyar Sakkvilag 07/1934
1. Preis
P0001339
(6+16)
h#2
b) alles eine Reihe nach unten
a) 1. dxe3ep Txa4+ 2. Kg5 Tg4#
b) 1. cxb3ep+ Kxb6 2. Le2 Txf4#
play all play one stop play next play all
Keywords: En passant as key, Twin by board shift
Genre: h#, Retro
Reprints: (XVI) Problem 37-40 09/1956
211 Europe Echecs 122 03/1969
(16) diagrammes 112 01-03/1995
Input: Gerd Wilts, 1995-6-3
Last update: hpr, 1999-4-4 more...
15 - P0001357
Thomas R. Dawson
The Fairy Chess Review 1939
P0001357
(15+12)
Weiß nimmt 1 Zug zurück, dann #3
R: 1. Ld3-h7, dann 1. Dd1+ Kxc3 2. Lg7+ e5 3. Lxe5#
play all play one stop play next play all
Henrik Juel: -1.Ld3 f5 -2.Lg7 f6 -3.Le4xSd3 Se1-d3 -4.Ld3 f7 -5.Le4xSd3 Sc1 -6.Tg5 Kd1 -7.Ke3 Sh4 etc. (2004-3-18)
comment
Keywords: Help retractor, Non-standard material
Genre: Retro
Reprints: 231 Europe Echecs 134 03/1970
Input: Gerd Wilts, 1995-6-3
Last update: Gerd Wilts, 2004-8-10 more...
16 - P0001722
Thomas R. Dawson
Charles Edward Kemp

5677 The Fairy Chess Review 8 10/1943
P0001722
(8+12)
h=Retropatt in 3
R: 1. Kf7xSe7 Sc8-e7 2. Kg8xTf7 Tc7-f7! 3. 0-0 Td7-c7 Retropatt
play all play one stop play next play all
Henrik Juel: Stipulation should be 'help-retrostalemate in 3'. -0... Kf7xSe7 -1.Sc8 Kg8xTf7 -2.Tc7! 0-0 -3.Td7 and Black is retrostalemate. Not a defensive retractor, but a help retractor with a weird aim. (2004-3-18)
Sally: Zurück:
1. Kd7xSe7? - Sg8-e7,
2. Kc8xTd7? - Tg7-d7,
3. O O O??? - Tfg7!
In der Verführung wäre die Rücknahme der langen Rochade illegal, da der w. Bauer a2 als Schlagobjekt im Osten gebraucht wurde und sich auf "a8" umwandelte. Somit musste der
schwarze Turm auf "a8" bereits gezogen haben! (2018-6-5)
comment
Keywords: Help retractor, Symmetrical position, Asymmetrical solution, Castling
Genre: Retro
Reprints: 336 FIDE Album 1914-1944/III 1975
H28 ASymmetrie 2013
Input: Gerd Wilts, 1995-6-3
Last update: Alfred Pfeiffer, 2018-6-5 more...
17 - P0001729
Thomas R. Dawson
The Fairy Chess Review 1946
P0001729
(9+14)
#1
7 schwarze Schläge: bxa, cxb, dxc, exd, fxe, gxf, hxg; 2 weiße Schläge: axb, bxa. Umwandlung des wBh2 auf h8.
R: 1. Lf8-e7 Lb7-a8 2. Le7-f8 Kd8-c8 3. Lf8-e7+ Ke8-d8 4. Le7-f8 Lc8-b7 5. Lf8-e7 Ld7-c8 6. Le7-f8 Kd8-e8 7. Lf8-e7+ Kc8-d8 8. Ke7-d6 d6xTc5
Schwarz ist am Zug: 1. g8=D#? 1. ... Txc6#
play all play one stop play next play all
Keywords: Whose move?, Retro Opposition
Genre: Retro
Input: Gerd Wilts, 1995-6-3
Last update: Gerd Wilts, 2002-4-16 more...
18 - P0001730
Thomas R. Dawson
The Fairy Chess Review 1941
P0001730
(11+15)
#2
1. Td1+ 2. Lxc7#
play all play one stop play next play all
Sally: Fairy Cess Review 4871 (VIII 1941)
1. Td1+. Not 1. 000+, because of single oppositon
among Kd8 -c8, Bc8 -d7 - e8, Ra8 - a7 and Bb8 - a7
in Trying to open b8 for Sa6! (2010-4-14)
comment
Keywords: Cant Castler, Retro Opposition, Castling (wg)
Genre: Retro
Input: Gerd Wilts, 1995-6-3
19 - P0001731
Thomas R. Dawson
The Fairy Chess Review 1941
P0001731
(13+14) cooked
#3
Schwarze Schläge: axb, exd, fxe; weiße Schläge: hxg, dxc. Umwandlung wBa2 auf a8 und sBh7 auf h1. Zur Auflösung muss der sSg7 auf h1 entwandelt werden. Der sSg7 kann nur vom wSf8 befreit werden. R: 1. Le8-d7 Sd7-f8 2. Tb8-c8 c2-c3 3. Tc8-b8 Sb8-d7 4. Ld7-e8 Sa6-b8 5. Tb8-c8 Sb4-a6 6. Tc8-b8 Sd3-b4 7. Tb8-c8 Sf2-d3 8. Tc8-b8 Se4-f2 9. Tb8-c8 Sg3-e4 10. Tc8-b8 Sf5-g3 11. Sh5-g7 Sg7-f5+ 12. Sg3-h5 b4-b5 13. Sh1-g3 b3-b4 14. h2-h1=S b2-b3 15. h3-h2 g3-g4 16. h4-h3 g2-g3 17. h5-h4. Spätestens jetzt muss entweder der wT oder der wK ziehen. Die Rochade ist also nicht möglich, wenn Schwarz zuletzt gezogen hat.
1. 0-0-0? 1. Sxd7! oder 1. Kf2!
play all play one stop play next play all
Keywords: Cant Castler, Retro Opposition, Castling (wg)
Genre: Retro
Input: Gerd Wilts, 1995-6-3
Last update: Gerd Wilts, 2002-4-16 more...
20 - P0001732
Thomas R. Dawson
The Fairy Chess Review 1945
P0001732
(12+14)
#1
Schwarze Schläge: axb, cxd, dxe, exf. Weiße Schläge: hxg, gxh. Umwandlung des wBa2 auf a8 und des wBc2 auf c8. Zur Auflösung muss der wLh5 über f5 und e6 nach a8 gespielt werden. R: 1. Te6-e7 Lg6-h5 2. Te7-e6 Lf5-g6. Nun muss wTa1 oder wKe1 ziehen, die Rochade ist also nicht möglich, wenn Weiß am Zug ist.
1. 0-0-0#? 1. Kd2#!
play all play one stop play next play all
Keywords: Cant Castler, Retro Opposition, Castling (wg), Promotion
Genre: Retro
Input: Gerd Wilts, 1995-6-3
Last update: Gerd Wilts, 2002-4-16 more...
21 - P0001734
Thomas R. Dawson
The Fairy Chess Review 1938
P0001734
(8+10) C+
#1 vor 2
VRZ, Typ Proca
1) R: 1. Kg2-h3 g4xDf3 2. Dh3-f3+, dann 1. Dg3#
2) R: 1. Kg2-h3 g4xTf3 2. Te3-f3+, dann 1. Te4#
3) R: 1. Kg2-h3 g4xLf3 2. Le4-f3, dann 1. Sg6#
4) R: 1. Kg2-h3 g4xSf3 2. Se5-f3, dann 1. S5g6#
play all play one stop play next play all
more ...
comment
Keywords: Allentschlag, Defensive Retractor, Type Proca
Genre: Retro
Computer test: RSP 1.0
Reprints: 30 Encyclopedia of Chess Problems , p. 20, 2012
Input: Gerd Wilts, 1995-6-3
Last update: Olaf Jenkner, 2017-12-27 more...
22 - P0001757
Thomas R. Dawson
The Problemist 1929
P0001757
(8+15)
Weiß nimmt 1 beliebigen Zug zurück, dann nimmt Schwarz einen Zug zurück und #1
R: 1. Dc4-f4 Lb3-a4, 1. Txc5#
1. Dd4-f4 Dd3-h7, 1. Sxe3#
1. De4-f4 Dh1-h7, 1. Txg5#
1. Dd6-f4 Td7-c7, 1. Se7#
play all play one stop play next play all
illegale Stellung?
Henrik Juel: Yes, position is illegal, because orig. Pa2 must have captured. Possible correction: replace Pg5 by a wT. (2004-3-18)
Mario Richter: Original stipulation: Whatever White retracts, Black then retracts and mates in 1.
5th variation: 1.De5-f4 Df5-h7, 1.fxe6#
Dawson: "five interferences by pinned White Q. This is normal Proca play." (2009-6-13)
comment
Keywords: Help retractor
Genre: Retro
Reprints: 110 Caissa's Wild Roses 1935
326 FIDE Album 1914-1944/III 1975
Input: Gerd Wilts, 1995-6-3
Last update: Gerd Wilts, 1996-7-16 more...
23 - P0001758
Thomas R. Dawson
The Problemist 1929
P0001758
(12+14)
Weiß nimmt 1 beliebigen Zug zurück, dann nimmt Schwarz einen Zug zurück und h#1
R: 1. Sf2-h1 h7xDg6, dann Kh4 g3#
R: 1. Lf2-g1 h7xTg6, dann Lc2 g4#
R: 1. Sf7-h8 h7xLg6, dann Kg4 Txa4#
R: 1. Dc8-b8 h7xSg6, dann e5 Df5#
play all play one stop play next play all
Keywords: Help retractor, Allentschlag
Genre: Retro
Reprints: 109 Caissa's Wild Roses 1935
327 FIDE Album 1914-1944/III 1975
Input: Gerd Wilts, 1995-6-3
Last update: Alfred Pfeiffer, 2014-3-11 more...
24 - P0001847
Thomas R. Dawson
The Chess Amateur 1927
V. Röpke gewidmet
P0001847
(13+14)
Welches waren die letzten 38 Einzelzüge?
R: 1. Dc1-a3 d4-d5 2. Kb2-b3 b3-b4 3. Sb4-d3 d3-d4 4. Sc6-b4 d2-d3 5. Sd8-c6 f6-f7 6. Sf7-d8+ f5-f6 7. a3-a2 f4-f5 8. a4-a3 f3-f4 9. a5-a4 f2-f3 10. a7-a5 a6xTb7 11. c2-c1=D a5-a6 12. c3-c2 a4-a5 13. c4-c3 a3-a4 14. c5-c4 a2-a3 15. c7-c5 c6xDd7 16. Dc8-d7 c5-c6 17. Ld7-e8 c4-c5 18. Sd8-f7 Kf7-g6 19. Sc6-d8+ Kg6-f7
play all play one stop play next play all
Sally: Nr. 2 : Schach ohne Grenzen (Fabel & Kemp 1969). (2012-2-21)
comment
Keywords: Last Moves? (38), Promotion (D)
Genre: Retro
Reprints: 102 Caissa's Wild Roses 1935
125 Ultimate Themes 1938
Input: Gerd Wilts, 1995-6-3
Last update: A.Buchanan, 2018-4-2 more...
25 - P0001848
Thomas R. Dawson
The Chess Amateur 1918
P0001848
(12+10)
Ergänze einen wT, dann #1
+wTb1? +wTc3!: 1. b3#
play all play one stop play next play all
Sally: Die w. Bauern haben 6 mal geschlagen, und zwar auch Bb7 nach Umwandlung Bb7 hat auf a2 einen w. Turm geschlagen.
Nr. 3 : Schach ohne Grenzen (Fabel & Kemp 1969). (2012-2-21)
Henrik Juel: Here is a detailed solution
White pawns captured all six missing black men by c2xd3x..xh7 (on light squares) and h2xLg3
Black captured [Lf1] at home and the remaining two missing white men by b3xa2 (to promote to D or S on a1) and g7xf6
The forward sequence was gxf6 before hxg3 before [Th1] could exit; but it could not reach a2, so [Th1] is still on the board (and the black pawns captured g7xSf6 and [Ta1] on a2 )
The only possible #1 is with [Th1] added on c3, as it could not reach b1 (2018-1-6)
Mario Richter: Henrik's analysis shows that it would suffice to stipulate: "Add a Piece, then #1". I would prefer this version since it gives the solver the chance to detect some more RA issues by himself (e.g. that the Piece to add can only be a White rook). (2018-1-16)
comment
Keywords: Promotion, Add pieces
Genre: Retro
Reprints: 107 Caissa's Wild Roses in Clusters 1937
3 Chess unlimited , p. 37, 1969
35 Die Schwalbe 71, p. 326, 10/1981
1 feenschach 143, p. 225, 08-10/2001
(F) The Problemist 07/2010
Input: Gerd Wilts, 1995-6-3
Last update: Alfred Pfeiffer, 2018-1-16 more...
26 - P0001849
Thomas R. Dawson
The Chess Amateur 1930
P0001849
(11+15)
Wer gewinnt?
1. Dxc6!
R: 1. Tf5-f6 Sh6-g8 2. Tf6-f5 Sf5-h6 3. c4-c5 Sd4-f5 4. Tf5-f6 Sb3-d5 5. c3-c4 Sc5-b3 6. Sf6-d7 Sd7-c5+ 7. Sg8-f6 Tf6-f7 8. Sh6-g8 Tf7-f6 9. c2-c3 Tf6-f7 10. Sf7-h6 a5-a4 11. Sh8-f7 Tf7-f6 12. h7-h8=S
play all play one stop play next play all
"Three Kisses"
Sally: Nr. 8 Schach ohne Grenzen (Fabel & Kemp 1969). (2012-2-21)
comment
Keywords: Whose move?, Retro Opposition, Promotion (S)
Genre: Retro
Reprints: 129 Caissa's Wild Roses 1935
Input: Gerd Wilts, 1995-6-3
Last update: Gerd Wilts, 1996-7-16 more...
27 - P0001850
Thomas R. Dawson
The Chess Amateur 1920
P0001850
(5+4)
Weiß nimmt 1 Zug zurück, dann #2
R: 1. h2-h4, dann 1. h4 gxh3ep 2. Lxg6#
play all play one stop play next play all
AV: Dasselbe Bild ist keineswegs dieselbe Stellung ! (2014-11-20)
more ...
comment
Keywords: En passant, Help retractor
Genre: Retro
Reprints: 103 Caissa's Wild Roses 1935
1 Chess unlimited , p. 35, 1969
Die Schwalbe 102 12/1986
(E) The Problemist 07/2010
Input: Gerd Wilts, 1995-6-3
Last update: Alfred Pfeiffer, 2014-11-21 more...
28 - P0001881
Thomas R. Dawson
Einführung in das Märchenschach
P0001881
(14+13)
h#1
1. bxc3ep Sc4#
R: 1. c2-c4 h3-h2 2. Dc3-c5 h4-h3 3. Tc4-c6 h5-h4 4. Tc5-c7 Tc6-c8
play all play one stop play next play all
Sally: Mehrfache Retro-Bahnung.
S. 39 Nr. 5 Schach ohne Grenzen (Fabel & Kemp 1969). (2012-2-21)
comment
Keywords: En passant, Last Moves?, Promotion, En passant as key
Genre: h#, Retro
Reprints: Kongreßbuch Teplitz-Schönau 1923
Input: Gerd Wilts, 1995-6-3
Last update: Mario Richter, 2011-8-19 more...
29 - P0001882
Thomas R. Dawson
Hamburgischer Correspondent 1924
P0001882
(13+14)
#1 (wer?)
"And drags at each remove a lengthening chain."
Henrik Juel: The stipulation should be '#1 (who?)'. 1.Bxc7#, not 1... Sxh7?, because White has the move: -1... Se4 -2.Ba7 Sg3 -3.Bb8 Sf5 -4.Ba7 Bb8 -5.Rc7 Rc6 -6.f3 eRd6 -7.Re6 Se7 -8.Sh6 Sg8 -9.Re7 Re6 -10.Sf5 cRd6 -11.Rc6 Bc7 -12.Se3 Bb8 -13.Sc2 Bc7 -14.Sa3 Bb8 -15.Sb5 Bc7 -16.f2 Bb8 -17.Sc7 h4 -18.Sa8 Bc7 -19.Bb8 h5 -20.S=a7 h6 -21.a6 a7:QS etc. (2003-11-10)
Sally: Fängt man mit einem w. Stein an, so fehlt am Schluß ein Tempozug. Weiss ist daher am Zuge und setzt mit Lxc7#. Bei der Rücknahme der Verführung treten 2 Retro-Oppositionen auf
einmal auf e7 und später auf c7, bei der Rücknahme der Lö-
sung nur eine auf c7, die ein thematisches Tempo kostet. S. 39 , Nr. 7 Schach ohne Grenzen (Fabel & Kemp 1969). (2012-2-21)
Alfred Pfeiffer: Original stipulation: "Who mates in 1 ?" (2013-5-15)
comment
Keywords: Retro Opposition, Whose move?
Genre: Retro
Reprints: 3176 Deutsche Schachblätter 15/01/1925
128 Caissa's Wild Roses 1935
(37) Die Schwalbe 71 10/1981
Input: Gerd Wilts, 1995-6-3
Last update: Alfred Pfeiffer, 2013-5-15 more...
30 - P0001883
Thomas R. Dawson
The Problemist 1937
2. ehrende Erwähnung
P0001883
(3+3) C+
-1(w+s), dann h#1
R: 1. Sd5xSe3 Sf5xSe3 dann Sf5-d4 Sa3-c4
(RSC 1.0)
play all play one stop play next play all
Erich Bartel: Nachdruck:
1) Schach ohne Grenzen 1969,S.35 (2008-11-10)
comment
Keywords: Help retractor
Genre: Retro
Input: Gerd Wilts, 1995-6-3
Last update: Alfred Pfeiffer, 2013-7-19 more...
31 - P0001884
Thomas R. Dawson
Aachener Anzeiger 1926
P0001884
(8+2)
#1 vor 2
VRZ, Typ Hoeg
klären: Quelle: Schach ohne Grenzen, S.35, Nr.3 = Magyar Sakkvilag, 1926 (VF)
Henrik Juel: -1.Q=c7 Bb4:S -2.Sc5, 1.Sb3#; -1.. Bc5:S -2.Sb4, 1.4Sc2#. It is illegal to supplement a checking bS on a6. (2003-10-9)
Sally: Weiß nimmt c7-c8D zurück. Nimmt Schwarz Lb4-a3 zurück, so ergänzt Weiß auf a3 einen Springer und nimmt Sc5-a6 zurück, um durch Sb3#. Nimmt Schwarz Lc5-a3 zurück, so ergänzt Weiß auf a3 wieder einen Springer und nimmt Sb4-a6 zurück, um durch Sc2 mattzusetzen. (2012-2-21)
comment
Keywords: Promotion, Defensive Retractor, Defensive Retractor, Type Høeg
Genre: Retro
Reprints: 127 Magyar Sakkvilag 04/1926
(31) On Retraction Chess Problems 1927
Input: Gerd Wilts, 1995-6-3
Last update: Gerd Wilts, 2004-6-10 more...
32 - P0001885
Thomas R. Dawson
Hampstead and Highgate Express 1912
P0001885
(12+14)
BP in 34.0
1. a4 c5 2. a5 Db6 3. Ta4 Sc6 4. Td4 Tb8 5. b4 cxd4 6. b5 e5 7. d3 La3 8. Le3 Lc1 9. bxc6 Db2 10. c7 b5 11. a6 Tb7 12. axb7 h5 13. b8=L Lb7 14. c8=D+ Ke7 15. Sf3 d5 16. Dh3 Th6 17. g4 Ta6 18. Dg3 h4 19. c4 hxg3 20. h4 Ta1 21. h5 Kf6 22. Sh2 dxe3 23. h6 Kg5 24. h7 Kh4 25. c5 a5 26. c6 a4 27. c7 b4 28. c8=T b3 29. h8=S Se7 30. Sg6 fxg6 31. Lh3 Sc6 32. 0-0 Sb4 33. Ld6 Sc2 34. Td8 Se1
play all play one stop play next play all
"Promenades to Power"

Es läßt sich beweisen, daß die UWs in D,T,L,S zwingend erfolgt sind (a2-b8=L,h2-b8=S und entweder b2-c8=D/c2-c8=T oder b2-c8=T/c2-c8=D).
Erich Bartel: weitere Nachdrucke:
3) 160 Die Allumwandlung im Problemschach VIII 1966a---
4) Schach ohne Grenzen 1969.-- (2007-1-9)
Sally: Vier erzwungene Umwandlungen. (2012-2-21)
comment
Keywords: Allumwandlung, Castling (wk), Non-Unique Proof Game
Genre: Retro
Reprints: 53 Caissa's Wild Roses 1935
Chess unlimited 1969
150 Shortest Proof Games 11/1991
Input: Gerd Wilts, 1995-6-3
Last update: A.Buchanan, 2012-4-7 more...
33 - P0001889
Thomas R. Dawson
The Chess Amateur 1921
P0001889
(12+10)
#2
1. Kd2#, nicht 1. 0-0-0#
play all play one stop play next play all
Henrik Juel: Typos: change # to +. Position is released by retracting Ta1 to h1, h7xLg6, Lg6 to f1, g2xLh3 etc. (2004-3-18)
comment
Keywords: Cant Castler, Castling (wg)
Genre: Retro
Reprints: 116 Caissa's Wild Roses 1935
213 FIDE Album 1914-1944/III 1975
Input: Gerd Wilts, 1995-6-3
Last update: Gerd Wilts, 1996-7-16 more...
34 - P0001892
Thomas R. Dawson
Eskilstuna-Kuriren 1922
P0001892
(15+13)
#2
1. Sd3+, nicht 1. 0-0+
play all play one stop play next play all
"The Double Exit"
Erich Bartel: weiterer Nachdruck:
3) D1161 Retro-Opp0sition VIII 1989.--- (2008-9-16)
comment
Keywords: Cant Castler, Retro Opposition, Castling (wk)
Genre: Retro
Reprints: 154 Caissa's Wild Roses in Clusters 1937
216 FIDE Album 1914-1944/III 1975
Input: Gerd Wilts, 1995-6-3
Last update: Gerd Wilts, 1996-7-22 more...
35 - P0001901
Thomas R. Dawson
The Pittsburgh Gazette Times 1915
P0001901
(9+12)
Ergänze eine wD, dann #1
+wDe8: 1. Sc3#
R: 1. Ka3-a2 e7-e8=D
play all play one stop play next play all
Henrik Juel: Analysis
White pawns captured all four missing black men by axb, bxa, and cxbxa, and he promoted [Ph2] on h8 (and possibly [Pe2] on e8)
Black pawns captured all five (after addition) missing white men by e7xf6 and h7xPg6x...xc2
-1... Ka1 -2.Tb2 Kb1 -3.Ta2 Ka1 -4.Tb2 Ka2 -5.Tb1 leads nowhere, so -5... Ka3 D=Pe7 must happen sooner or later (2018-2-23)
Henrik Juel: all six, not five, of course (2018-2-23)
comment
Keywords: Add pieces, Promotion, Promotion in the retro play
Genre: Retro
Reprints: Arnhemsche Courant 24/12/1926
103 Caissa's Wild Roses in Clusters 1937
344 FIDE Album 1914-1944/III 1975
Input: Gerd Wilts, 1995-6-3
Last update: Mario Richter, 2018-2-23 more...
36 - P0001921
Thomas R. Dawson
Grazer Tagespost 10/1923
P0001921
(4+3)
s#2
Längstzüger
1. c7? Txc7 2. g7 Ta2!
1. g7! Txg7 2. c7 Tg1#
play all play one stop play next play all
Nyarlathotep: Français:

Comme l'a expliqué Jean Bertin dans son livre "Histoires extraordinaires sur 64 cases", la présence du pion e5, bien que paraissant superflue, est obligatoire car le rétrojeu serait impossible à construire.

Les derniers coups ont été Ta8-e8+ Re7xe8. Ce coup aurait été impossible à faire sans le pion e5, les noirs auraient les coups géométriquement plus long Re7-d6 et Re7-f6 à leur disposition. Stupéfiant.

English (slightly different from the French text!):
As explained once by Jean Bertin in "Histoires extraordinaires sur 64 cases", the pawn e5 is necessary to have a legal retroplay.

The last moves are Ra8-e8+ Ke7xe8.

Without the pawn e5, Kxe8 is illegal because Black have at their disposal Kd6 and Kf6!

Another piece of virtuosity by TRD! (2010-12-24)
Kevin Begley: Bertin's comment overlooks the possibility of relocating the bK e8 to e5 -- which bigfoots this extraneous unit, preserves retro-legality (-1.Ke6xQ/Re5 etc), and maintains the theme (Asymmetry). A curious oversight, for TRD. (2011-5-16)
Kevin Begley: last move can also be -1.K~xQe5 (from d4/d6/f4/f6). (2011-5-16)
more ...
comment
Keywords: Maximummer, Asymmetrical solution
Genre: Fairies
Reprints: 62A Asymmetry 1927
Input: Gerd Wilts, 1995-6-3
Last update: Kevin Begley, 2011-5-16 more...
37 - P0001930
Thomas R. Dawson
Eskilstuna-Kuriren 1923
F. Lindgren gewidmet
P0001930
(16+11)
#1
R: 1. c7-c5 Sc5-d3+ 2. Kc4-d4+ Sc6-a5+ 3. Sa5-b3+ Sb3-c5+
1. dxc6ep#
play all play one stop play next play all
"A Steeplechase"
Sally: Ist BXB e.p. legal oder nicht? In dieser Stellung gibt es ein klares Matt in einem Zug, wenn nämlich d5xc6 e.p. erlaubt ist. Ein Durchzählen der Steine zeigt, dass 5 s.Fi-
guren fehlen, nämlich ein Springer und 4 Bauern. Bei Weiß fehlt kein Stein, er hat 5 Bauern geschlagen: einen mit g2 nach f3; einen mit e2 auf die d Linie; einen mit a2 auf die b-Linie und 2 mit b2 Weg von und wieder zurück auf die b-Linie. Bringt man diese in Verhältnis zu den fehlenden schwarzen Steinen, zeigt sich, dass die sB. auf d7 und f7 nur von den wießen Bauern von e2 und g2 geschlagen werden konnten; der sS könnte von dem wB von a2 geschlagen worden
sein. Bleiben 2 von Weiß geschlagene Figuren übrig, die den Weg des wBb2 herum zurück zur b-Linie erklären. Es sind die
beiden sB von e7 und g7. Beide müssen sich auf e1 bzw. g1 umgewandelt haben, bevor sie über das Brett auf die Königsseite gezogen sind. Dadurch konnte der wBb2 die beiden oben noch offenstehende Steine schlagen; so waren die
die letzten Züge nicht Ke4-d4, Bxf3+. (Ein Hindernisrennen)
Nr. 62 Märchenschach (A. Dickens 1986). (2012-2-21)
comment
Keywords: En passant, Consecutive checks, En passant as key
Genre: Retro
Reprints: 112 Caissa's Wild Roses 1935
Input: Gerd Wilts, 1995-6-3
Last update: A.Buchanan, 2012-5-28 more...
38 - P0001970
Thomas R. Dawson
26 Kongreßbuch Teplitz-Schönau 1923
P0001970
(13+13)
h#1
1. exf3ep Lc2#
play all play one stop play next play all
1.exf3e.p. Bc2# is the only possible solution, but this necessitates R: 1.f2-f4. Can we prove this?

(13+13) with 1+2 pawn captures. Bf8 captured at home, so to satisfy White appetite, the missing Black pawn (a or b) must have promoted via c2 on c1. Two more White units must be captured to allow this.

The kings cage can only be unlocked by retracting WPc2. But the clock is ticking as there are only 6 black moves which can be retracted.

The promoted piece was captured on e3 or h3. If either capture is undone, then a White bishop square is cut off, so WB must be replaced prior to this.

Now the order of the early moves is: WdP moves, WQB & WQR escape, BP promotes on c1 to X (capturing WR at some point), X captured by WP.

So the first White capture must be dxNe3 and the second White capture releases gxXh3. The second White capture releases WKB & WKR. WKR captured by original BfP.

The clock starts ticking with gxh3. Black has 6 pawn moves. WKB has 3 moves to reach h7. WR has 3 if it goes via d file, or 2 if it starts on g1 (in which case WfP or WQB must also move once). So certainly at least 6 White moves. Last move was therefore White (even if the stipulation didn't tell us), and it can only have been WfP coming from f3 or f4. If it had been coming from f3 it would have blocked WKB in its progress, so the last White move was indeed R: 1.f2-f4.

WKR did therefore move from g1-g4-e4, and R: 1. ... fxRe5 2. Rg4-e4. Prior to that, move order not unique, but counting still exact.

Note that WN loitering on b4, pretending to be part of the cage, is present on the board just to make up the numbers.
Jeliss: "Obstruction of passage square f3 to Bishop of same colour."

"Version 'Pittsburgh Leader' 08.06.1913"
Henrik Juel: -1.f2 f5xTe4 -2.Tg4 f6 -3.Tg1 f7 -4.Le4 h5 -5.Lg2 h6 -6.Lf1 h7 -7.g2xDTSh3, unpromote DTS on c1, etc. (2004-3-18)
Henrik Juel: Nice analysis, Andrew, but your last comment seems incorrect.
Without Sb4, 1.b4 Txb4+ is not mate because of 2.Txb4#! (2013-7-26)
A.Buchanan: Thanks Henrik, I have fixed the solution. Forward chess is even harder than retro chess. And because Rb7 is retro-pinned, I overlooked that it's not forward-pinned! (2013-7-27)
Yoav Ben-Zvi: Appears as the first problem (D445) in the booklet on Dawson's RA problems by G.P. Jellis. The obstruction that occurs in the Try -1.Pf3-f4?, by WP of WB, is described as "obstruction of passage square". It is not considered by Dawson and his disciples to be a Retro opposition. Dawson's conception of RO was quite broad, it included cases where the interference was not by occupation of the target square, so the only valid reason that I can see to exclude this case is that the 2 pieces involved are both of the same color. Fabel's definition explicitly excludes "Monochrome RO". I conclude that it would be preferrable to interpret RO as a bi-chromatic interference. The keyword Retro opposition should be removed. (2018-4-7)
comment
Keywords: Last Moves?, En passant as key
Genre: h#, Retro
Reprints: D445 Retro-Opposition [Jelliss] 1989
Input: Gerd Wilts, 1995-6-3
Last update: Mario Richter, 2018-4-9 more...
39 - P0001971
Thomas R. Dawson
Svenska Dagbladet 1925
P0001971
(11+16)
h#2
Henrik Juel: 0... fxe3ep 1.Se4 bxc3 2.Sxc3#. -1.e2 e4xTd3 -2.Td1 f5xTe4 -3.Te3 f6 -4.Td3-e3 f7 -5.Td2-d3 f5 -6.d3 g6xDLf5 -7.Kd4 Lc4 etc. (2004-3-18)
Sally: D 801 (15. VII 1913)
Svenska Dagbladet 752 (20. XII 1925)
Clearance of e4 - e3 for Rook of same
colour, (2010-4-14)
comment
Keywords: En passant, Last Moves?, Retro Opposition
Genre: h#, Retro
Input: Gerd Wilts, 1995-6-3
Last update: Gerd Wilts, 1996-6-2 more...
40 - P0001972
Thomas R. Dawson
Pittsburgh Post 1923
P0001972
(16+11)
h#1
Henrik Juel: 0... cxd3ep 1.Kd4#. -1.d2 Tf5 -2.Sf6 Td5 -3.Sf5 Td3 etc. (2004-3-18)
Henrik Juel: The problem is incorrect, because the retroplay could also be -1.Le5 Tf5 -2.Lf6 Td5 etc. (2005-2-18)
Mario Richter: Since there's also the even more trivial retroplay 0. ... f2-f3 Tf5-f6 1. Sf6-g4+ Tf3-f5 2. Sf5-h4+, my guess is, that the diagram is misprinted and that the wLg3 should be placed on f2. Doing so, the ep-key is justified, because in this case White's last move must have been d2-d4 (to provide d3 as a square for the black rook). (2011-8-19)
comment
Keywords: En passant, Last Moves?, Retro Opposition, En passant as key
Genre: h#, Retro
Input: Gerd Wilts, 1995-6-3
Last update: Mario Richter, 2011-8-19 more...
41 - P0001973
Thomas R. Dawson
Eskilstuna-Kuriren 1917
A. A. Troitzky gewidmet
P0001973
(12+14)
#2
Verführung: 1. 0-0#??, aber nach dem zuletzt einzig möglichen R: Kb/c2-c1 zerstören alle weißen Rückzüge, die das Schach durch den Th2 erklären (d2-d4/e2-e3/f2-f3/g2-g3/Ke2-e1/Kf2-e1+), das weiße Recht zu rochieren.
Deshalb nur 1. Te2 ~ 2. Kf2#
play all play one stop play next play all
Henrik Juel: Stipulation should be #2, I think. 1.Te2 (2.Kf2#). -1... Kc2 -2.d2/e2/f2/g2, and Th2 cannot reach a1 without ruining the castling. (2004-3-18)
comment
Keywords: Cant Castler, Castling (wk)
Genre: h#, Retro
Input: Gerd Wilts, 1995-6-3
Last update: Mario Richter, 2011-8-19 more...
42 - P0001974
Thomas R. Dawson
Eskilstuna-Kuriren 1917
P0001974
(11+15)
#3
Henrik Juel: 1.Tb5 Txg6+ 2.Lxg6. -1... d5 -2.Lf4 Tf8 -3.Dg3 Dh3 -4.Dh2 Sg3 -5.Dh1 Lh2 etc. (2004-3-18)
Erich Bartel: Nachdrucke:
1) Retro Opposition, 1989.---
2) Problemkiste (66) XII 1989.--- (2007-4-15)
Yoav Ben-Zvi: Might be the earliest publication of a sound problem showing Retro-Opposition (on g3 after -1...BPd5-d4 -2.Bf4-g3) It may also be the first instance of "Sliding Block" (Verschiebepuzzle) without conditions. Appears as D918 in Dawson's booklet on Retro-Opposition. (2017-12-5)
comment
Keywords: Cant Castler, Castling (sk)
Genre: Retro
Reprints: Problemkiste (66) 12/1989
Input: Gerd Wilts, 1995-6-3
Last update: Erich Bartel, 2013-7-27 more...
43 - P0001975
Thomas R. Dawson
Natal Mercury 1915
P0001975
(15+14)
#2
R: 1. f7-f5 Tf5-e5+ 2. Le3-f4 Ld4-h8
1. gxf6ep
play all play one stop play next play all
15+14 pieces. Black captured hxg, so [weP] promoted. White captured cxb and then either exd/f (in which case [beP] promoted in turn) or [beP] was captured to clear the path. This accounts for all captures.

Last move must have been by bPf5. Try out lines of retro play: -1. f6-f5? Bf7-e6+? (No prior move for Black) -1. ... Rf5-e5+ -2. Be3-f4+? (Impossible check from wQa4). So last move -1. f7-f5! Rf5-e5+! -2 Be3-f4+! Bd4-h8+!

So forward play 1. gxf6ep+ Kh4 2. fxg3#.
Sally: Caissa`s Wild Roses 111 (1935)
Natal Mercury (10 VII 1915)
Obstruction of passage square
"f6" to adverse Bishop.
Peter Niehoff (2010-4-14)
comment
Keywords: En passant, Last Moves?
Genre: Retro
Reprints: 111 Caissa's Wild Roses 1935
Input: Gerd Wilts, 1995-6-3
Last update: A.Buchanan, 2017-1-28 more...
44 - P0001976
Thomas R. Dawson
Eskilstuna-Kuriren 1916
P0001976
(16+13)
#3
Henrik Juel: 1.fxe6ep+ Kxe4 2.Lxg6+. -1... e7 -2.e5xDd6 Db4 -3.Ld5 Sf7 etc. (2004-3-18)
comment
Keywords: En passant, Last Moves?
Genre: Retro
Input: Gerd Wilts, 1995-6-3
45 - P0001977
Thomas R. Dawson
The Pittsburgh Gazette Times 1915
P0001977
(9+11)
Ergänze eine weiße Dame, dann #1!
+wDc2, dann 1. Db1# R: 1. Ka1-b1 DxSc2
play all play one stop play next play all
Keywords: Add pieces
Genre: Retro
Reprints: 122 Caissa's Wild Roses 1935
Input: Gerd Wilts, 1995-6-3
Last update: Gerd Wilts, 2005-12-3 more...
46 - P0001978
Thomas R. Dawson
Eskilstuna-Kuriren 1918
P0001978
(11+13)
Ergänze einen schwarzen Springer in einer Ecke, so daß Weiß in einem Zug mattsetzen kann!
Henrik Juel: Add sSh8. 1.Sxh3#. -1... Sg6 -2.Lc2 Sf4 -3.Ld1 Se2 -4.Lc2 Sc1 -5.Ka1 Sa2 -6.Lb1 Dc1 etc. (2004-3-18)
Yoav Ben-Zvi: Not +BNa8?: Black is to move due to Parity Argument.
Not +BNa1?: Illegal position due to Retro-Opposition between BN and WB on c2.
An alternative stipulation: "If the position is legal: #1 (who?)" with a)BN on a1 (illegal), b)BNa1 to b2 (1.WNg1xh3#! not 1...BQa3-a2#?), c)BNa1 to c2 (illegal).
Appears as D1089 in Dawson's "Seventy Five Retros", 1928. (2017-12-21)
Henrik Juel: I just discovered that an edited version of Dawson's 1928 manuscript can be found at
www.theproblemist.org/trd-retop.html (2017-12-21)
Henrik Juel: Just for the record:
This problem did not appear in Dawson's 1928 manuscript, but was added by the editor G. P. Jelliss
In the edited version the manuscript retros are marked by ¤

On the RO discussion:
Now we have not only Dawson's notion of RO, but also Jelliss's interpretation of Dawson's notion... (2017-12-21)
comment
Keywords: Retro Opposition, Add pieces
Genre: Retro
Input: Gerd Wilts, 1995-6-3
47 - P0001979
Thomas R. Dawson
Svenska Dagbladet 1923
P0001979
(11+14)
#2
1. gxh6 ... 2. g8=D,T#
play all play one stop play next play all
"Blundering Horsemen"
Henrik Juel: 1.gxh6 (2.g8DT#). Black could castle, only if he had the move: -1.Sc2 Sf7 ... -9.Sg8 Sf7 -10.Sh6 Sd8 -11.Sf7 d4 -12.Sh8 Sf7 -13.S=h7 etc. (2004-3-18)
Henrik Juel: The stipulation implies that White has the move, so Black starts the retroplay
Assume (for contradiction) that Black may castle; then Ta8 and Ke8 may not retract, and Black is left to retract Sh6 (because e4-e3 is needed at the end of the retroplay), which must pendle on f7, d8, h8, h6, reaching f7 every other retraction
The only way to release the position is to unpromote Sa1 on h8; one route is a1-c2-e3-d1 and then c3-a4-b6-c8-e7-g8-h6-f7-h8
The retroplay goes -0... Sf7 -1.Sc2 Sh6 .. -9.Sg8 Sd8 -10.Sh6 and now we are stuck: -10... e4 is premature (-11.Sf7 occupies the square Black wants to go to), and -10... Sf7 occupies the square White wants to retract to
We conclude that Black may not castle, allowing 1.gxh6 thr. 2.g8=DT#
In a 1928 manuscript Dawson called the theme Retro Opposition, and this has been the accepted terminology ever since; for this situation I prefer the more descriptive term Retro Collision, as the white and black knights collide on f7 (2017-12-20)
Henrik Juel: corrections: not e4-e3, but d4-d3, and later -10... d4 (2017-12-20)
Yoav Ben-Zvi: Dawson did not attempt a definition of "Retrograde Opposition" in the 1928 manuscript. His conception of the theme was broad as seen by examples such as P0001982 (D1141 in the manuscript). Fabel narrowed things down to a contest over occupation of a square between opposite-colored pieces which Henrik prefers to call "Retro-Collision". The Themes Index of the FIDE Albums defines Retro Opposition as "In a particular phase of the retro-play it can be proved which side is to play, despite there being mobile pieces on both sides." ignoring entirely the characteristic contested square. According to this definition the problem asking "Whose move?" for a position identical to the initial array would qualify although it is an elementary example of "Parity Argument" rather than RO. (2017-12-21)
Henrik Juel: What a mess!
According to Yoav we have three notions of RO, so whenever we use these words we really should add: according to Fabel, Dawson, or FIDE Albums
In the PDB Gerd entered lots of RO problems, but he (wisely?) neglected to define RO (2017-12-21)
comment
Keywords: Cant Castler, Retro Opposition, Castling (sg)
Genre: Retro
Input: Gerd Wilts, 1995-6-3
Last update: Alfred Pfeiffer, 2017-12-21 more...
48 - P0001980
Thomas R. Dawson
Eskilstuna-Kuriren 1917
P0001980
(13+12)
#2
Version
Henrik Juel: 1.Kd2, not 1.0-0-0? White could castle, only if Black had the move: -1.Ld7 La7 -2.Lc8 Lb8 -3.Lb7 La7 -4.La8 Lb8 -5.L=a7 b7 -6.b6xDa7 Da8 -7.b5 La7 -8.b4 Lc5 -9.b3 Lf8 -10.b2 e7 -11.e6xf7 etc. (2004-3-18)
Erich Bartel: Nachdruck:
1) D1138 Retro-Opposition VIII 1989.--- (2008-9-16)
comment
Keywords: Cant Castler, Retro Opposition, Castling (wg), Promotion
Genre: Retro
Input: Gerd Wilts, 1995-6-3
49 - P0001981
Thomas R. Dawson
91 Funkschach 08/1925
P0001981
(12+14)
#2
Henrik Juel: 1.Td1+, not 1.0-0-0? White could castle, only if Black had the move: -1.Lh7 Tf6 -2.Lg8 Ke8 -3.Lh7 Kf7 -4.Dc8 etc. (2004-3-18)
comment
Keywords: Cant Castler, Retro Opposition, Castling (wg)
Genre: Retro
Input: Gerd Wilts, 1995-6-3
Last update: Frank Müller, 2010-8-7 more...
50 - P0001982
Thomas R. Dawson
Svenska Dagbladet 1923
P0001982
(13+9)
#2
"The Check in passing"
Henrik Juel: 1.Kd2, not 1.0-0-0? White could castle, only if Black had the move: -1.Sf6 Kh5 -2.Sg8 Kh4 ... -8.Se2 Kh4 -9.Sc5 Te4 etc. (2004-3-19)
more ...
comment
Keywords: Cant Castler, Retro Opposition, Castling (wg)
Genre: Retro
Input: Gerd Wilts, 1995-6-3
Last update: Gerd Wilts, 2009-3-14 more...
51 - P0001983
Thomas R. Dawson
Aachener Anzeiger 1922
G. Breyer zum Gedenken
P0001983
(15+12)
#2
Henrik Juel: 1.Kd2+, not 1.0-0-0? White could castle, only if Black had the move: -1.Lf1 Sc5 ... -4.Le2 Sd1 -5.Lf1 e2xSd1=S -6.Sc3 e3 -7.e2xPf3 etc. (2004-3-18)
Sally: "The Knight in Pawn"
Magyar Sakkvilag F7 (IV 1922). To the Memory of
Gyula Breyer.
1. Kd2+. Not 0 0 0+,because of K/R tempo, e.g.retract
1. Sc5-b7 - Bd1-e2, 2. Se4-c5 - Be2-d1, 3. Sd2-e4 - Bd1-e2,
4. Sf1-d2 - Rb1-a1, 5. Be2xSf1(S). Single opposition os
Be2/Sb7 at moment of unpromtion of Knight. (2010-4-14)
comment
Keywords: Cant Castler, Retro Opposition, Castling (wg), Promotion
Genre: Retro
Input: Gerd Wilts, 1995-6-3
52 - P0001984
Thomas R. Dawson
Eskilstuna-Kuriren 1927
P0001984
(13+14)
#1
"The Obstinate Priest"
Henrik Juel: 1.Kf2#, not 1.0-0? White could castle, only if Black had the move: -1.Th5 Lb8 ... -5.Th5 Lf8 -6.Th6 e7xDf6 -7.De6 h5 -8.f6 d7 -9.f5 f6xDg5 -10.Dg4 f7 -11.g5 c7 -12.g6xLh7 Lg8 etc. (2004-3-18)
comment
Keywords: Cant Castler, Retro Opposition, Castling (wk)
Genre: Retro
Input: Gerd Wilts, 1995-6-3
53 - P0001985
Thomas R. Dawson
L'Italia Scacchistica 1919
P0001985
(11+15)
#1
Henrik Juel: 1.Tf1#, not 1.0-0? White could castle, only if Black had the move: -1.Te5 Tf7 -2.Te6 Ke5 -3.Tf6 etc. (2004-3-18)
comment
Keywords: Cant Castler, Retro Opposition, Castling (wk)
Genre: Retro
Input: Gerd Wilts, 1995-6-3
54 - P0001986
Thomas R. Dawson
L'Eclaireur du Soir 1924
Marcel Despres gewidmet
P0001986
(14+13)
#1
Henrik Juel: 1.Ke2#, not 1.0-0-0? White could castle, only if Black had the move: -1.Lg8 Tf6 -2.Lb3 Tf7 -3.Ld1 Tf6 -4.Le2 Te6 -5.Sf7 Te5 etc. (2004-3-18)
comment
Keywords: Cant Castler, Retro Opposition, Castling (wg)
Genre: Retro
Input: Gerd Wilts, 1995-6-3
55 - P0001987
Thomas R. Dawson
Aachener Anzeiger 1927
P0001987
(12+15)
#1
"A Tower in Two Ways"
Henrik Juel: 1.Tc2#, not 1.0-0? White could castle, only if Black had the move: -1.Sh7 Te6 -2.Sf6 a7 -3.Se4 Tf6 -4.Sd2 Te6 -5.Sc2 etc. (2004-3-18)
comment
Keywords: Cant Castler, Retro Opposition, Castling (wk)
Genre: Retro
Input: Gerd Wilts, 1995-6-3
56 - P0001988
Thomas R. Dawson
The Pittsburgh Gazette Times 1920
D. J. Densmore zum Gedenken
P0001988
(14+11)
#3
Henrik Juel: 1.Ke2 (2.Ta1#), not 1.0-0? White could castle, only if Black had the move: -1.Se7 e4 -2.Sg8 Le7 ... -7.Sc5 Sa5 -8.Sb7 Sb3 -9.h6 Sa1 -10.h5 S=a2 -11.h4 a3 -12.h3 a4 -13.h2 a5 -14.b3 a6 -15.a5xb6 etc. (2004-3-18)
Erich Bartel: Nachdruck:
1) D1157 Retro-Opposition VIII 1989.--- (2008-9-16)
comment
Keywords: Cant Castler, Retro Opposition, Castling (wk)
Genre: Retro
Input: Gerd Wilts, 1995-6-3
57 - P0001989
Thomas R. Dawson
1206 Eskilstuna-Kuriren 11/03/1922
P0001989
(14+14)
#1
b) a3/c7 nach a4/c6
a) 1. 0-0-0
R: 1. ... Se6-g7 2. Lc1-d2 Sc5-e6 3. Ld2-c1 Sb3-c5 4. Lg8-h7 Sc1-b3 5. Lh7-g8 c2-c1=S 6. Lg8-h7 b3xDc2 7. Dd1-c2 b4-b3 8. Da4-d1 b5-b4 9. Dd4-a4 a4-a3 10. Dh8-d4 a5-a4 11. h7-h8=D a6-a5 12. h6-h7 a7-a6 13. h5-h6 h6xSg5

b) 1. 0-0-0
R: 1. ... Se6-g7 2. Lc1-d2 Sc5-e6 3. Ld2-c1 Sb3-c5 4. Lg8-h7 Sc1-b3 5. Lh7-g8 c2-c1=S 6. Lg8-h7 b3xSc2 7. Sa3-c2 b4-b3 8. c2-c3 b5-b4 9. Lc3-d2 c7-c6 10. Lh8-c3 a5-a4 11. h7-h8=L a6-a5 12. h6-h7 a7-a6 13. h5-h6 h6xLg5
play all play one stop play next play all
Lösung aus G.P.Jelliss' Buch 'Retro-Opposition'
In both 1. 0-0-0# as K/R need not move against the double opposition in the 'try' 1. Se6-g7 Bc1-d2 2. Sc5-e6 Bd2-c1 3. Sb3-c5 Bg8-h7 4. Sc1-b3 Bh7-g8 5. c2-c1=S Bc1-d2 6. b3xQc2 d2-d3 7. b4-b3 Qe4-c2 8. b5-b4 Qe5-e4 9. a4-a3 Qh8-e5 10. a5-a4 Bg8-h7 11. a6-a5 h7-h8=D 12. a7-a6 h6-h7 one turn too late. But instead retract:
(a) 5... Bg8-h7 6. b3xQc2 Qd1-c2 7. b4-3 Qa4-d1 8. b5-b4 Qd4-a4 and as the try. but White's KBg8 is now properly placed.
(b) 5... Bg8 -h7 6. b3xSc2 Sa3-c2 7. b4-b3 c2-c3 8. b5-b4 Bc3-d2 9. c7-c6 Bh8-c3 etc - in time.
Motto: "The Double Crossing"

im 'ACB' nur Teil b) nachgedruckt mit dem Zusatz "Query: Why Not Castles, Mate?" und der Forderung "White mates in Two Moves".
Henrik Juel: 1.0-0-0#. -1... Se6 -2.Lg8 Sd4 -3.Lh7 Sb3 -4.Lg8 Sc1 -5.Lh7 S=c2. a) -6.Lg8 b3xDc2 -7.Lc1 b4 -8.Da4 b5 -9.Dd4 a4 -10.Dh8 a5 -11.D=h7 a6 -12.h6 a7 -13.h5 h6xg5 etc. b) -6.Lg8 b3xSc2 -7.Sa3 b4 -8.c2 b5 -9.Lc3 c7 -10.Lh8 a5 etc. Very nice. (2004-3-18)
comment
Keywords: Retro Opposition, Castling (wg)
Genre: Retro
Reprints: 1594 American Chess Bulletin 04/1922
D1158 Retro-Opposition [Jelliss] 1989
Input: Gerd Wilts, 1995-6-3
Last update: Mario Richter, 2016-3-20 more...
58 - P0001990
Thomas R. Dawson
Svenska Dagbladet 1923
P0001990
(11+14)
#3
"The Captive Queen"
Henrik Juel: 1.Kd2 (2.Ta1+) La7 2.e8DT+. White could castle, only if Black had the move: -1.Dh8 Tf6 -2.Dg8 La7 -3.Df7 Lb8 -4.De8 etc. (2004-3-18)
comment
Keywords: Cant Castler, Retro Opposition, Castling (wk)
Genre: Retro
Reprints: 122 Caissa's Wild Roses in Clusters 1937
Input: Gerd Wilts, 1995-6-3
Last update: Gerd Wilts, 1996-7-22 more...
59 - P0001991
Thomas R. Dawson
Eskilstuna-Kuriren 1920
Dr. Niels Hoeg gewidmet
P0001991
(15+13)
#3
Henrik Juel: 1.gxf6ep+ Sc2 2.Lxc2+. -1... f7 -2.c2xLb3 Kf5 -3.Kf8 Dg6 etc. (2004-3-18)
comment
Keywords: En passant, Last Moves?, Retro Opposition
Genre: Retro
Input: Gerd Wilts, 1995-6-3
60 - P0001992
Thomas R. Dawson
The Chess Amateur 1922
P0001992
(13+14)
#1
Henrik Juel: 1.cxb6ep#. -1... b7 -2.h2 b6xTa5 -3.Tb5 etc. (2004-3-18)
comment
Keywords: En passant, Last Moves?, Retro Opposition
Genre: Retro
Input: Gerd Wilts, 1995-6-3
61 - P0001995
Thomas R. Dawson
Birmingham Post 14/07/1911
P0001995
(6+7)
#2
1. Sd4
1. ... bxa6 2. Db1#
1. ... b6 2. Sc6#
1. ... d5 2. Dg3#
1. ... fxg6 2. Tf8#
1. ... gxf6 2. Dg8#
play all play one stop play next play all
Schwarz hat keinen letzten Zug!
Sally: (Verwackelt)
1. Sb5-d4?
mit 5 Varianten, entsprechend den s. Bauernzügen :
Db1, Sc6, Dg3, Tf8, Dg8#. Aber :
Der w. König kann unmöglich die s. Bauernkette durchgebrochen haben, um nach d7 zu gelangen! Auch bei den 2 Zurücknahmen
c7, d6, oder e7, d6 bleibt diese Frage offen im Sinne der retrograden Analyse. Die Stellung des w. Königs ist partieunmöglich - das Problem ist verwackelt! (2017-8-9)
Henrik Juel: The problem is not of the 'Whose move?' type, and the specification 'Weiss am Zug' does not appear in 'Retrograde Analysis'
In 'RA' the problem is unclearly lumped together with two problems that have legal positions, but are incorrect as Black has no possible last move
This problem has an illegal position (because wK could not reach d7), so it is meaningless to ask for last move
I suggest that the Keyword 'Whose move?' is replaced by 'Joke' (2017-8-9)
Yoav Ben-Zvi: It seems to me this is a legitimate "Whose move?" problem since WK on d7 is illegal only if it is White to move. However after 0...BPb7xa6 White plays either 1.Nxd6 or 1.Q-b1 so the #2 is cooked. Correction: Move WNb5 to b3 and WPc3 to c4, add WPa5, WPc5, BPc6. (2017-8-22)
Thomas Volet: Surely Dawson knew that for the position to be legal it must Black's move in the diagram. Perhaps the joke is that the forward play is to continue with Black moving, particularly as it seems that White will be able to mate no later than it's second move no matter what Black does. I like the variation 1…. PxP, 2.Q-b1, but it has been a long time since this writer moved chess pieces in forward time, so no assurances. (2017-8-23)
Henrik Juel: My above comment is not well formulated...
In 'Retrograde Analysis' the problem appears in the chapter on illegal positions with the comment 'The present group is illegal, because it is White's turn to move, and Black could not have played last.'
It has the stipulation Mate in two, and the solution is stated as 1.Sd4; there is no indication that TRD was interested in 'Whose move?' or in the forward play after a first move by Black (2017-8-23)
A.Buchanan: In January 1911, Hjorth's accidental P0001996 had appeared, but July of that year was I think too early for the Article 15 theme to be established. Although Dawson here has accidentally created a very pretty position of Black pawns and White King, there is no indication that he is profiting from it by having new or interesting play after Black plays a zeroth move. In particular 0... b6 has many responses, which are also not defeated by Yoav's version.

I tried to find this newspaper in an archive, but 1911 seems not be stored.

@Henrik: what is the book 'Retrograde Analysis'? (2017-8-26)
Henrik Juel: Alain C. White published a book on chess problems each year for many years, and sent it to his friends for Christmas.
In 1915 the book was 'Retrograde Analysis' by Dawson and Hundsdorfer. It contains almost 300 problems, many by the authors, and includes many originals, like the Høeg classic with three e.p. captures. The Hjorth problem appeared as No. 2, on which the authors write:
'We remember our surprise at finding No. 2 reproduced by a careful editor with an added White Pawn at a2 and a Black Pawn at a3. Their remoteness from the field of action drew attention quaintly to the grave illegality they were intended to correct.' (2017-8-26)
A.Buchanan: OK I see. I will add this as a reprint. If Dawson himself said the problem simply had an illegal position, then that ends the discussion. Does anyone have a copy of L.N.de Jong's earlier "Onmogelijke Standen" in "Op de Hoogte" referred to on page 9? (2017-8-27)
Mario Richter: The date given for the de Jong article in the Dawson/Hundsdorfer book is wrong, correct is 09/1911.
The "Onmogelijke Standen" articles can befound at http://resolver.kb.nl/resolve?urn=dts:399009:mpeg21:0085 and http://resolver.kb.nl/resolve?urn=dts:399012:mpeg21:0074

The oldest problem I could find so far, which uses the "no legal last black move" Argument intentionally, is P1338137. (2017-8-27)
A.Buchanan: @Mario: thanks very much for the links. Page 41 of D&H also mentions a revolutionary pamphlet "On the Nature of Chess Problems" by A.Gehlert in 1903. I am curious about this, and I wonder if there is a copy of that extant? (2017-8-27)
Yoav Ben-Zvi: P0002016 is a #1 example from 1870. This contains a unique solution for every 'zero' move by Black, obviously an advantage although in case there is one Black move that leads to a unique solution then multiple solutions in other 'variations' can be tolerated as duals. This problem lacks a 'Try' that is refuted because it is Black's move. For a #2 that includes a 'Try' see P1012013 (noted by Andrew in comment to P0001996). (2017-8-27)
comment
Keywords: Illegal position
Genre: Retro
Reprints: 1770 Wiener Hausfrauen-Zeitung 51, p. 615, 15/12/1912
1B Retrograde Analysis , p. 7, 1915
479 Hamburger Problem-Nachrichten 09-10/1949
Im Wunderland des Schachproblems , p. 36, 1958
Input: Gerd Wilts, 1995-6-3
Last update: A.Buchanan, 2017-8-27 more...
62 - P0002007
Thomas R. Dawson
7B Retrograde Analysis 1915
P0002007
(7+13)
#1
1) R: 1. ... Dh2-g1, dann 1. Dc7 Sd6#
2) R: 1. ... Dg3-g1, dann 1. Dc7 Sd6#
3) R: 1. ... Dg4-g1, dann 1. Dc4 Td5#
4) R: 1. ... Dg5-g1, dann 1. Dc5 Td4#
5) R: 1. ... Dg6-g1, dann 1. Dc6 axb7#
play all play one stop play next play all
Schwarz hat voreilig mattgesetzt und dabei das weiße Turmschach nicht beachtet. Er muß seinen illegalen Damezug zurücknehmen und statt dessen mit der Dame (Berührt-Geführt-Regel) das Turmschach parieren.
Aus Retrogründen scheidet h2xg1=D# als letzter Zug von Schwarz aus.
TBr: Original-Lösung:
In No. 7B Black in his eagerness to mate has played Queen from h2, g3, 4, 5, 6, quite forgettin the White Rook check, Replace the Black Queen and demand a legal Queen move, and according to the check is covered at c7, 6, 5, or 4, then Sd6, PxP, Rd4 or Rd5 metes--the Black Queen interfering with four of her own pieces. (2015-9-6)
comment
Keywords: Illegal position, Touch Move, Retract illegal move, Joke
Genre: Retro
Input: Gerd Wilts, 1995-6-3
Last update: A.Buchanan, 2018-10-6 more...
63 - P0002019
Thomas R. Dawson
Bolton Football Field 24/12/1910
P0002019
(14+9)
#2
1. Dxb4+ 2. Db2#
Schwarz hat keinen letzten Zug.
play all play one stop play next play all
Mu-Tsun Tsai: If, regardless of being an illegal position, we still wish to consider this as a White mating Black problem, then this is in fact a tough #9 problem with key 1.bxa5! (C+ Popeye). (2012-7-22)
comment
Keywords: Whose move?
Genre: Retro
Reprints: 14 Retrograde Analysis 1915
Input: Gerd Wilts, 1995-6-3
64 - P0002026
Thomas R. Dawson
Westen und Daheim 02/05/1915
P0002026
(7+2)
#3
R: 1. Kg7-h8 Be7-e8=S+
play all play one stop play next play all
AB: Solution (& keywords) are from a different problem. Solution is 1 Bf7 etc. (2001-10-16)
Gerd Wilts: The retro play given in the solution serves only to justify that it may indeed be White's turn. The forward play indeed starts with 1. Bf7. The idea of TRD was to compose a problem which is legal but in which one of the knights must be a promoted pawn. TRD called this an "obtrusive Knight". (2001-10-17)
AB: Oops it would be neat to have feature to delete my tired remark. :-) (2001-10-17)
comment
Keywords: Promotion (S)
Genre: Retro
Reprints: 17B Retrograde Analysis 1915
476 Hamburger Problem-Nachrichten 09-10/1949
E1 Problem 5-6 12/1951
RA69 diagrammes 28 07-08/1977
Input: Gerd Wilts, 1995-6-3
Last update: Frank Müller, 2016-10-16 more...
65 - P0002032
Thomas R. Dawson
1000 Pittsburgh Gazette Times 13/07/1913
P0002032
(16+12)
Der schwarze König hat nie zwei gleiche Felder betreten. Auf welchen 20 Feldern hat er mindestens gestanden?
R: 1. Dh1-a8+ Ka8-a7 2. Tb7-b8+ Kb8-a8 3. Tc7-b7+ Kb7-b8 4. Tc6-c7+ Kc7-b7 5. Td6-c6+ Kc6-c7 6. Td5-d6+ Kd6-c6 7. Te5-d5+ Kd5-d6 8. Te4-e5+ Ke5-d5 9. Tf4-e4+ Ke4-e5 10. Tf3-f4+ Kf4-e4 11. Tg3-f3+ Kf3-f4 12. Tg2-g3+ 13. Kf2-f3 Tg1-g2 14. Ke2-f2 Lg2-f1+ 15. Kd3-e2 Sc4-b2+ 16. Kc2-d3
Nun muß der sK über d1, e1, f1 zuück nach e8.
play all play one stop play next play all
more ...
comment

Genre: Retro
Reprints: 21 Retrograde Analysis 1915
74 Caissa's Fairy Tales 1947
Input: Gerd Wilts, 1995-6-3
Last update: Alfred Pfeiffer, 2014-8-6 more...
66 - P0002035
Thomas R. Dawson
Pittsburgh Leader 25/05/1913
P0002035
(10+15)
Wer zog zuletzt?
R: 1. La2-b1 a6-a7 2. Sb3-c1 a5-a6 3. Da1-d1 a4-a5 4. Td1-d2 f5-f6 5. Td2-e2
f4-f5 6. Tb1-d1 Ke2-f1 7. Td1-d2+ Kf1-e2
Bis Ta1 und Lf1 heimgeführt wurden, dürfen die wBBa7+f6 maximal bis a4 bzw. f4 zurückgezogen werden.
play all play one stop play next play all
Keywords: Whose move?, Last Moves?
Genre: Retro
Reprints: 22 Retrograde Analysis 1915
Input: Gerd Wilts, 1995-6-3
Last update: Mario Richter, 2011-9-10 more...
67 - P0002036
Thomas R. Dawson
401 Pittsburgh Gazette Times 24/12/1911
P0002036
(16+15)
Schwarz gab zweimal Schach in den letzten 3 Zügen!
R: 1. Kc8xLc7 Lb8-c7+ 2. g4-g5 Se6-f8 3. Lc7-d8 Sd8-e6+
play all play one stop play next play all
Frank Müller: 401 Pittsburgh Gazette Times 24.12.1911 (2010-10-26)
comment
Keywords: Help retractor, Last Moves?
Genre: Retro
Reprints: 23 Retrograde Analysis 1915
22 L'Echiquier de France 07/1957
Input: Gerd Wilts, 1995-6-3
Last update: Frank Müller, 2013-3-17 more...
68 - P0002037
Thomas R. Dawson
Wiener Schachzeitung 1912
P0002037
(14+11) cooked
Stellung vor 7 Zügen?

Genre: Retro
Reprints: 23A Retrograde Analysis 1915
Input: Gerd Wilts, 1995-6-3
Last update: Gerd Wilts, 2004-3-13 more...
69 - P0002038
Thomas R. Dawson
Darmstädter Tageblatt 1926
P0002038
(14+13)

Aus Milescu's Exemplar von Retrograde Analysis
Henrik Juel: What is the stipulation? Easy release: -1... Sd4 -2.a4 Sb3 -3.a3 Sc1 -4.b3 S=c2 -5.b2 b3xLc2 -6.Ld3 b4 -7.Lf1 b5 -8.e2xf3 etc. (2004-3-18)
comment
Keywords: Non-standard material
Genre: Retro
Input: Gerd Wilts, 1995-6-3
Last update: Gerd Wilts, 2004-8-9 more...
70 - P0002040
Thomas R. Dawson
400 Pittsburgh Gazette Times 24/12/1911
P0002040
(14+13)
Stellung vor 2 Zügen?
R: 1. Kb3-a2 c4xDd5 2. Df7-d5 d5-d6 3. De8-f7 d4-d5 4. Dd8-e8 c3-c4 5. Kc4-b3 c2-c3 6. Kd5-c4 d3-d4 7. Ke6-d5 d2-d3 8. Kf7-e6 b5-b6 9. Ke8-f7 b4-b5 10. f7xSg6
play all play one stop play next play all
Frank Müller: 400 Pittsburgh Gazette Times 24.12.1911 (2010-10-26)
comment
Keywords: Non-standard material
Genre: Retro
Reprints: 24 Retrograde Analysis 1915
Input: Gerd Wilts, 1995-6-3
Last update: Frank Müller, 2013-3-17 more...
71 - P0002041
Thomas R. Dawson
25 Retrograde Analysis 1915
P0002041
(12+13)
Welches waren die letzten 18 Einzelzüge?
R: 1. Dh3xDg2 c5-c6 2. Lc3-e5 c4-c5 3. Le1-c3 c3-c4 4. d2xLe1=L c2-c3 5. d3-d2 Ld2-e1 6. d4-d3 Lc1-d2 7. d5-d4 d2xSe3 8. d6-d5 Dh2-g2 9. Sg2-e3+ Kh1-g1
play all play one stop play next play all
Keywords: Last Moves? (18)
Genre: Retro
Input: Gerd Wilts, 1995-6-3
Last update: Gerd Wilts, 2002-10-5 more...
72 - P0002042
Thomas R. Dawson
Neuburger Wochenschach 29/12/1911
P0002042
(14+13)
Stellung vor 5 Zügen?
Henrik Juel: -1... c7 -2.g6 Tc6 -3.g5 Tg6 -4.g4 Tg8 -5.g3 g7xLh6. (2004-3-9)
AV: Correct stipulation : Stellung vor 4,5 Zügen ? (2014-11-21)
Henrik Juel: The retroplay given above seems unique, so the more restrictive stipulation 'Last 9 single moves?' is also possible (2014-11-21)
AV: Yes, of course ! (2014-11-21)
comment

Genre: Retro
Reprints: 25A Retrograde Analysis 1915
Input: Gerd Wilts, 1995-6-3
73 - P0002043
Thomas R. Dawson
Neuburger Wochenschach 29/12/1911
P0002043
(15+13)
Wer zieht?
R: 1. ... e7-e5 2. f5-f6 Te6-e1 3. f4-f5 Ta6-e6 4. Sc6-a7
play all play one stop play next play all
"Schachkongress Teplitz-Schönau im Oktober 1922" Seite 480, Nr. 21 nennt: Pittsburgh Gazette Times, 1911 (VF)
Henrik Juel: White has the move. -1... e7 -2.f5 Te6 -3.f4 Ta6 -4.Sc6 etc. wP on f3 would prevent wL, uncaptured on b5, from reaching f1. (2004-3-9)
comment
Keywords: Whose move?
Genre: Retro
Reprints: 25B Retrograde Analysis 1915
(7) Mat Plus Review 13-14 08/2010
RC/10 feenschach 192 03-04/2012
Input: Gerd Wilts, 1995-6-3
Last update: Mario Richter, 2012-6-29 more...
74 - P0002044
Thomas R. Dawson
Reading Observer 26/12/1914
P0002044
(15+11)
Ergänze einen weißen Turm so, daß Weiß in einem Zug mattsetzen darf!
Henrik Juel: Add wRd4. 1.Bd5#. -1... Kd5 -2.Re4 etc. Is this really all there is to the problem? (2003-11-10)
comment
Keywords: Add pieces
Genre: Retro
Reprints: 26 Retrograde Analysis 1915
6 L'Echiquier de Paris 07/1956
Input: Gerd Wilts, 1995-6-3
75 - P0002048
Thomas R. Dawson
Bolton Football Field 31/12/1910
P0002048
(14+12)
(-1s,1w), dann #2
R: 1. Kc7-d8 Bc5xSd6, dann 1. Dxd6+ Kxc8 2. Txe8#
play all play one stop play next play all
Anm.: Schwarz kann zuletzt nicht g6-g5 (oder g7-g5) gezogen haben, weil dann der wBh2 3 Schläge bräuchte, um sich auf g8 in einen wL umzuwandeln.
Nach R: 1. Kc7-d8 ist Bc5xTd6? illegal, weil der sUW-T nicht erklärt werden kann.
Originalforderung:
Show that White, who here mates in two, could have mated in two on his last move.
Henrik Juel: -1.c5xSd6, 1.Dxd6+. (2004-3-9)
Mario Richter: In the diagram, there is already a #2, 1.d6xe7+ Kxe7 2.Qd6#, so all retractions, which don't disturb this idea, do work, e.g. R:Rc5-c4 or Nf2-h3.
Other cooks exist too, e.g. R:Bd7-c8, then 1.Rxe8+ Kxd7 2.Nf6#
Last but not least, simply R:Nf6-h5, then 1.Rxe8# and R:Kf6-e5, then 1.d6xe7# do the job even faster.
Maybe, this problem is a Hoeg-retractor? (2009-12-11)
Henrik Juel: I do not think so, Mario; Dawson was a brilliant innovator, but the Høeg retractor had not been invented in 1910.
Probably the diagram or the stipulation is wrong; it is unlikely that Dawson should have overlooked your cooks, unlike the first commenter, shrewdly disguising herself as hj... (2009-12-11)
Mario Richter: Henrik was correct with his assumption that the stipulation is wrong.
So the problem is well worth a second try with the correct stip. (2013-7-20)
comment
Keywords: Help retractor
Genre: Retro
Reprints: 28 Retrograde Analysis 1915
Input: Gerd Wilts, 1995-6-3
Last update: Mario Richter, 2013-7-20 more...
76 - P0002059
Thomas R. Dawson
The Illustrated London News 20/12/1913
P0002059
(2+12)
#2
Weiß kann nicht rochieren, da vor dem letzten Zug von Schwarz entweder der wK oder wT gezogen haben muß.
1. 0-0? 1. Tf1!
play all play one stop play next play all
Sally: S. 37, Nr. 4 Schach ohne Grenzen (Fabel & Kemp 1969). (2012-2-21)
comment
Keywords: Cant Castler, Castling (wk), Minimal
Genre: Retro, 2#
Reprints: 34 Retrograde Analysis 1915
167 Allgemeine Zeitung Chemnitz 20/11/1927
(1) diagrammes 46 07-08/1980
Input: Gerd Wilts, 1995-6-3
Last update: Felber, Volker, 2014-11-20 more...
77 - P0002060
Thomas R. Dawson
Natal Mercury 22/11/1913
P0002060
(15+14)
#2
R: 1. Db8-a7 2. Dc7-b8 3. Dd8-c7 4. c7xLb6 Ld4-b6 5. g4-g3 Le5-d4 6. g5-g4 Lg3-e5 7. g6-g5 Le1-g3 8. h6-h5 Ld2-e1 9. h7-h6 Lc1-d2
1. De5
play all play one stop play next play all
Keywords: Cant Castler, Castling (sk)
Genre: Retro
Reprints: 35 Retrograde Analysis 1915
Input: Gerd Wilts, 1995-6-3
Last update: Gerd Wilts, 2001-2-16 more...
78 - P0002061
Thomas R. Dawson
The Chess Amateur 12/1913
P0002061
(12+16)
#2
Schwarz kann nicht mehr rochieren, da entweder der sK oder der sT Tempozüge gemacht haben müssen.
1. De5
play all play one stop play next play all
Mario Richter: Hat jemand Zugriff auf die Originalquelle? So wie in "Retrograde Analysis" abgedruckt, ist die schwarze 0-0 sehr wohl möglich (die Schlagbilanz erlaubt, daß Bg2-g3 zurückgenommen wird, ohne daß zuvor der wLf1 heimgeführt wurde). Meine Vermutung: einer der Springer a1 oder h1 ist ein wS. (2011-9-15)
comment
Keywords: Cant Castler, Castling (sk)
Genre: Retro
Reprints: 35A Retrograde Analysis 1915
Input: Gerd Wilts, 1995-6-3
Last update: Gerd Wilts, 2001-2-16 more...
79 - P0002062
Thomas R. Dawson
Aachener Anzeiger 1914
P0002062
(14+14)
#2
Der sK oder der sTh8 müssen Tempozüge gemacht haben.
1. De6
play all play one stop play next play all
Keywords: Cant Castler, Castling (sk)
Genre: Retro
Reprints: 35B Retrograde Analysis 1915
Input: Gerd Wilts, 1995-6-3
Last update: Gerd Wilts, 2001-2-16 more...
80 - P0002063
Thomas R. Dawson
The Problem 04/07/1914
P0002063
(13+14)
#3
Henrik Juel: 1.Dh8 Kd8 2.Lf7+. sK moved to let wL reach g8 or to let orig. Dd8 or Th8 out. (2004-3-9)
comment
Keywords: Cant Castler, Castling (sg)
Genre: Retro
Reprints: 36 Retrograde Analysis 1915
Input: Gerd Wilts, 1995-6-3
81 - P0002064
Thomas R. Dawson
Pittsburgh Gazette Times 21/12/1913
P0002064
(14+14)
#2
Henrik Juel: 1.Df5. Ke8 or Th8 moved for tempo: -1... Ta2 -2.Ta3 Tg8 -3.b3 etc. (2004-3-9)
comment
Keywords: Cant Castler, Castling (sk)
Genre: Retro
Reprints: 37 Retrograde Analysis 1915
Input: Gerd Wilts, 1995-6-3
82 - P0002065
Thomas R. Dawson
v Bolton Football Field 20/12/1913
P0002065
(14+13)
#2
Henrik Juel: 1.Sd7. Ke8 or Ta8 moved for tempo, e.g. -1... Tb8 -2.Dg8 Ta8 -3.D=g7 Tg8 -4.f6xLg7 etc. (2004-3-9)
comment
Keywords: Cant Castler, Castling (sg)
Genre: Retro
Reprints: 37A Retrograde Analysis 1915
Input: Gerd Wilts, 1995-6-3
83 - P0002066
Thomas R. Dawson
The Problem 18/07/1914
P0002066
(13+11)
#2
Henrik Juel: 1.Dd5. Black may not castle, e.g. -1... Lf8 -2.Tf3 Le7 -3.Tf1 Lf8 -4.Se7 Tg8 etc. (2004-3-9)
comment
Keywords: Cant Castler, Castling (sk)
Genre: Retro
Reprints: 37B Retrograde Analysis 1915
Input: Gerd Wilts, 1995-6-3
84 - P0002074
Thomas R. Dawson
894 Pittsburgh Gazette Times 30/03/1913
Murray Marble gewidmet
P0002074
(15+14)
#2
Henrik Juel: 1.Kf2+, not 1.0-0? wK moved because of c2-c1=S-d3+. (2004-3-9)
comment
Keywords: Cant Castler, Castling (wk)
Genre: Retro
Reprints: 42 Retrograde Analysis 1915
Input: Gerd Wilts, 1995-6-3
Last update: Frank Müller, 2010-12-23 more...
85 - P0002075
Thomas R. Dawson
Pittsburgh Gazette Times 21/12/1913
P0002075
(16+10)
#2
Henrik Juel: 1.Td1, not 1.0-0-0? -1... c7 -2.Kd2 Tg3 etc. (2004-3-9)
comment
Keywords: Cant Castler, Castling (wg)
Genre: Retro
Reprints: 43 Retrograde Analysis 1915
Input: Gerd Wilts, 1995-6-3
86 - P0002076
Thomas R. Dawson
v The Problem 29/08/1914
P0002076
(15+8)
#2
Henrik Juel: 1.Kf2, not 1.0-0? -1... b6 -2.Kf1 L=d2 -3.Sg3 Kb1 -4.Ld1 e3xDd2 -5.e4xLd5 Lb7 etc. (2004-3-9)
comment
Keywords: Cant Castler, Castling (wk)
Genre: Retro
Reprints: 43A Retrograde Analysis 1915
Input: Gerd Wilts, 1995-6-3
Last update: Gerd Wilts, 2004-3-9 more...
87 - P0002077
Thomas R. Dawson
The Problem 17/10/1914
P0002077
(15+9)
#1
Henrik Juel: Stipulation should be #1, I think. 1.Kf2#, not 1.0-0? -1... h7 -2.Kf1xLe1 etc. (2004-3-9)
gw: Yes, #1 (2004-3-9)
comment
Keywords: Cant Castler, Castling (wk)
Genre: Retro
Reprints: 43B Retrograde Analysis 1915
Input: Gerd Wilts, 1995-6-3
Last update: Gerd Wilts, 2004-3-9 more...
88 - P0002078
Thomas R. Dawson
Hampstead Express 27/12/1913
P0002078
(12+9)
#2
Henrik Juel: 1.Td1, not 1.0-0-0? -1... Tb8 -2.Kf2 etc. (2004-3-9)
comment
Keywords: Cant Castler, Castling (wg)
Genre: Retro
Reprints: 44 Retrograde Analysis 1915
Input: Gerd Wilts, 1995-6-3
89 - P0002079
Thomas R. Dawson
Tägliche Rundschau 24/12/1913
P0002079
(11+4)
#3
b) Bd3 nach d4
Henrik Juel: a) 1.Tg1 f5 2.gxf5, not 1.0-0? wK moved to let orig. Ta1 out. b) 1.0-0 f5 2.Ta1. (2004-3-9)
comment
Keywords: Cant Castler, Castling (wk)
Genre: Retro
Reprints: 45 Retrograde Analysis 1915
Input: Gerd Wilts, 1995-6-3
Last update: Gerd Wilts, 2004-10-25 more...
90 - P0002081
Thomas R. Dawson
Northern Whig 06/06/1912
P0002081
(7+2)
#3
Verführung: 1. 0-0? Kg3 2. Tf3+ Kh4 3.g3#, aber 0-0 ist illegal.
1. Tg1 Kg3 2. Thh1 Kh4 3. g3#
play all play one stop play next play all
more ...
comment
Keywords: Cant Castler, Castling (wk)
Genre: Retro
Reprints: 46 Retrograde Analysis 1915
Input: Gerd Wilts, 1995-6-3
Last update: Gerd Wilts, 2011-11-1 more...
91 - P0002084
Thomas R. Dawson
The Problem 31/12/1914
P0002084
(10+2)
#2
Version
Henrik Juel: 1.Lxb2 Kg1 2.Ke2#, not 2.0-0-0?, because Ta1 has moved. (2004-3-9)
comment
Keywords: Cant Castler, Castling (wg)
Genre: Retro
Reprints: 48 Retrograde Analysis 1915
Input: Gerd Wilts, 1995-6-3
92 - P0002085
Thomas R. Dawson
Aachener Anzeiger 1914
P0002085
(12+16)
#2
Henrik Juel: 1.Tf1+, not 1.0-0? -1... Lb3 -2.Th2 La4 -3.Te2 Lb5 -4.Te7 Se6 -5.Tg7 Lc6 -6.Tc8 Sd8 -7.Lf7 Ke8 -8.Le6 etc. (2004-3-9)
comment
Keywords: Cant Castler, Castling (wk)
Genre: Retro
Reprints: 49 Retrograde Analysis 1915
Input: Gerd Wilts, 1995-6-3
93 - P0002086
Thomas R. Dawson
The Problem 28/11/1914
P0002086
(14+8)
#2
Version
Henrik Juel: 1.Sf1+, not 1.0-0? -1... f7 -2.Tf1 Kh3 -3.Lh1 etc. (2004-3-9)
comment
Keywords: Cant Castler, Castling (wk)
Genre: Retro
Reprints: 49A Retrograde Analysis 1915
Input: Gerd Wilts, 1995-6-3
94 - P0002087
Thomas R. Dawson
The Problem 28/11/1914
P0002087
(12+9)
#1
Henrik Juel: 1.Ke2#, not 1.0-0? -1... h7 -2.Tg1xLh1 etc. (2004-3-9)
comment
Keywords: Cant Castler, Castling (wk)
Genre: Retro
Reprints: 49B Retrograde Analysis 1915
Input: Gerd Wilts, 1995-6-3
Last update: Gerd Wilts, 2004-3-9 more...
95 - P0002088
Thomas R. Dawson
The Problem 28/11/1914
P0002088
(12+11) cooked
#2
Original war mit wBc3 statt d4, wDc7 statt d6 und sTa8.
Henrik Juel: Intention probably is 1.Dxg3+ Kxg1 2.Dh2#, not 2.0-0-0? -1... h7 -2.Ta4 Sf5 -3.Tf4 etc. But the castling seems preservable by -2.Dc8 Sf5 -3.D=c7 etc. (2004-3-9)
gw: In my copy of RA the following correction is proposed: wDc7 to d6, wBc3 to d4, remove bTa8. (2004-3-9)
Henrik Juel: The correction with a slight change seems to work: Dc7 to d6, Pc2 (not c3) to d4, remove Ta8: -1... h7 -2.Ta5 Sf5 -3.Te5 etc. (2004-3-18)
comment
Keywords: Cant Castler, Castling (wg)
Genre: Retro
Reprints: 50v Retrograde Analysis 1915
Input: Gerd Wilts, 1995-6-3
Last update: Gerd Wilts, 2004-3-9 more...
96 - P0002089
Thomas R. Dawson
Natal Mercury 08/11/1913
P0002089
(12+14)
#2
Henrik Juel: 1.Tc7. If Ke8 hasn't moved, Th8 is orig. Ta8. The P capturing sequence was g7xSf6, f2xLg3, d7xDe6. (2004-3-9)
comment
Keywords: Cant Castler, Castling (sk)
Genre: Retro
Reprints: 51A Retrograde Analysis 1915
Input: Gerd Wilts, 1995-6-3
97 - P0002090
Thomas R. Dawson
Natal Mercury 13/06/1914
P0002090
(15+12)
#2
Henrik Juel: 1.Td1+, not 1.0-0-0? Ta1 is orig. Th1. The P capture sequence was d2xSe3, a7xLb6, h2xTg3. (2004-3-9)
comment
Keywords: Cant Castler, Castling (wg)
Genre: Retro
Reprints: 51B Retrograde Analysis 1915
Input: Gerd Wilts, 1995-6-3
98 - P0002109
Thomas R. Dawson
63A Retrograde Analysis 1915
P0002109
(9+14)
#1
Henrik Juel: 1.cxb6ep#. -1... b7 -2.d2 Sb5 -3.Ta1 d3xPc2 etc. (2004-3-9)
comment
Keywords: En passant
Genre: Retro
Input: Gerd Wilts, 1995-6-3
99 - P0002110
Thomas R. Dawson
63B Retrograde Analysis 1915
P0002110
(10+15)
#2
Henrik Juel: 1.cxb6ep+. -1... b7 -2.Sb1 La4 etc. (2004-3-9)
comment
Keywords: En passant
Genre: Retro
Input: Gerd Wilts, 1995-6-3
Last update: Gerd Wilts, 2004-3-9 more...
100 - P0002115
Thomas R. Dawson
Birmingham Post 23/06/1914
P0002115
(14+15)
#2
Henrik Juel: 1.fxe6ep+. -1... e7 -2.Tf6 Td6 etc. Not -1... e6? -2.Kf6 h7 and unavoidable retrostalemate. (2004-3-9)
comment
Keywords: En passant
Genre: Retro
Reprints: 66 Retrograde Analysis 1915
Input: Gerd Wilts, 1995-6-3
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