Die Schwalbe

32 problem(s) found in 3131 milliseconds (displaying 32 problem(s)). [COMMENTDATE>=20200919 AND NOT K='Hilfsrückzüger' AND K='Unterverwandlung' AND G='Retro'] [download as LaTeX]

1 - P0003960
Arthur Ford Mackenzie
467 Jamaica Gleaner 1891
P0003960
(3+1) C+
#3
1. La7 Kxa7 2. c8=T Ka6 3. Ta8#
play all play one stop play next play all
Max J. Meyer in 'Brighton and Hove Society', 1904: "It will be seen that the ideas of these two problems [dieses und P1143870] are the same. The addition of the White B. enables Mr. Mackenzie to get a much better key for this position, a point in which Steinweg's problem does not excel; but, of course, the use of an extra piece renders the miniature less remarkable from the point of view of smallness in size."
Paulo Roque: .
Solution:
1) 1. La7 KxLa7 2. c8=T! Ka6 3. Ta8#

2) Proof da legality of the answer:
Retro: 0... Ka7-a8 -1. b7-b8=L etc (2009-09-06)
Sally: Der letzte weiße Zug von Weiß kann nur Ba7xb8L gewesen sein, demgemäß enthält die Aufgabe 2 Bauernumwandlungen
in verschiedenen Figuren: in der lösung in einem turm und retrospektiv in einen Läufer.
406 Mattaufgaben mit 3 und 4 Steinen (Teil 1) Speckmann 1976 (2016-08-30)
Henrik Juel: There is even a third promotion in the threat 2.c8=D+
C+ by Popeye 4.61 (2016-08-30)
A.Buchanan: Here the threat play (1) is sound & (2) can never occur as Black has no neutral move. But if threat play is *unsound* yet can never occur, can it be safely ignored or will some directmate purists regard that as a defect? (2022-04-02)
Henrik Juel: I think not, Andrew
When I test problems, I ignore plays that do not occur (2022-04-02)
comment
Keywords: under-promotion (T), Stalemate avoidance, Promotion in the retro play (L)
Genre: 3#, Retro
Computer test: Popeye 4.61
FEN: kB6/2P5/2K5/8/8/8/8/8
Reprints: 64 Chess Lyrics , p. 100, 1905
1359 Wiener Hausfrauen-Zeitung 5, p. 77, 29/01/1905
5 Vliegend Blaadje 22/07/1911
Szachy 01/1958
The Problemist (20) 03/1969
406 Mattaufgaben mit drei und vier Steinen 1976
diagrammes 64 01-02/1984
(1) diagrammes 15 07-09/1994
Input: Gerd Wilts, 1995-06-03
Last update: Mario Richter, 2020-02-26 more...
2 - P1012051
Jean-Michel Trillon
261 Rex Multiplex 1/1984
P1012051
(5+4)
h=2
a) Monochromes Schach
b) Bichromes Schach
Ist die Stellung legal?
a) 1. Kd5-c6 d7xc8=L 2. c2xb1=S Lc8-a6=
b) 1. c2-c1=L Td3-d4+ 2. Kd5-d6 d7-d8=S=
play all play one stop play next play all
En bichromatique la légalité de la position ne pose pas de problème : pas de Fou en dehors de la case de départ ou de la ligne de promotion, ni de pion s doublés ou croisés. En monochromatique : Les B ont joué Tb3-d3+, mais il faut aussi justifier la position des Pions.Le Pf3 n'a pris ni la Dame, ni un Fc8 ni un Cavalier, ni Ta8 qui n'a pu venir sur la 3° rangée, il a donc pris un Pion.Compte tenu du Pc2, cela suppose 5 prises sur case blanches par PN : la D, le Ff1 et 2 pions seulement puisqu'il reste les Pf3 et d7. La Ta1 n'a pu être prise puisqu'elle se trouve en d4. La 5° prise s'explique par la capture d'un Pion sur case noire par prise en passant sur d3.
No. 11660 HN
Mario Richter: Henri Nouguier's comment seems to indicate, that Black necessarily did capture ep on d3. But that is not correct, since the position can be reached without that capture too ... (2021-08-13)
comment
Keywords: Bichrome Chess, Monochromatic Chess, Promotion (Ls,lS), under-promotion
Genre: Retro, Fairies
FEN: 2b5/3P4/8/3k4/8/3R1P2/1ppK4/1N6
Input: Henri Nouguier, 2004-01-11
Last update: Alfred Pfeiffer, 2018-04-17 more...
3 - P1317816
Peter Hoffmann
16412 Die Schwalbe 274, p. 201, 08/2015
nach Gerhard Pfeiffer & Reinhard Fiebig
spezielle ehrende Erwähnung
Abt. h#-Mehrzüger
PR Boris Schorochow
P1317816
(2+14) C+
h#8
0.1.1...
1. ... Kb2 2. Db3+ axb3 3. f1=D b4 4. Df4 bxc5 5. Dd6 cxd6 6. g1=D d7 7. Dg6 d8=S 8. Dh7 Sf7#
play all play one stop play next play all
Rolf Wiehagen: Siehe P0500863, Gerhard Pfeiffer 1985, mit 10 schwarzen Bauern, und P1087039, Reinhardt Fiebig 2005, mit 9 schwarzen Bauern.
Spezielle ehrende Erwähnung von Preisrichter Boris Shorokhov, der in seinem Preisbericht schreibt:
"Für drei Umwandlungen schwarzer Bauern in Damen werden neun Züge benötigt. Bisher gelang dies nur mit zu vielen schwarzen Bauern, d.h. in illegaler Stellung. Der Autor dieser Aufgabe vermeidet solche Positionen, aber die erste Umwandlung in eine Dame ist retroanalytisch begründet, offensichtlich war 1. d1=D+ der letzte schwarze Zug. Natürlich ist das nicht dasselbe, aber nach meiner Meinung verdient die Findigkeit des Autors eine spezielle Auszeichnung." (2021-04-22)
James Malcom: This problem is mentioned on berlinthema.de on 159 of this document: http://www.berlinthema.de/AUSWAHL_PH.pdf (2022-01-31)
A.Buchanan: It would be cool if our keyword system distinguished cleanly between retro & forward promotions. However we have too much clutter in the current vocabulary to extend in this way right now, imho. (2022-01-31)
comment
Keywords: Minimal (B), Oudot Theme, konsekutive Umwandlungen 4 (dddS), Excelsior white, under-promotion (S), Promotion (d), Model mate, Selfblock, Smothered mate, Corner mate, Phoenix, Antiphönix
Genre: h#, Retro
FEN: 6nk/6n1/8/2b2p2/p2p3p/8/P1K1ppp1/r2qr3
Input: Felber, Volker, 2016-02-29
Last update: Gunter Jordan, 2022-02-02 more...
4 - P1387652
Andrey Frolkin
WCCT 2020
P1387652
(12+12)
BP in 9.5
1. g4 b5 2. g5 b4 3. g6 b3 4. gxh7 bxa2 5. hxg8=S axb1=S 6. Sxe7 Sc3 7. Sd5 Sxe2 8. Sc3 Sxc1 9. Txc1 Sc6 10. Sb1
play all play one stop play next play all
Scheint ein Selbstplagiat zu sein. Das Stück wurde in Problemas (SEPA), 07/2020, Heft 31, H1, Seite 935 als Original veröffentlicht.
Henrik Juel: C+ Euclide 1.01
This is an example of the retro theme of WCCT-11
The thematic square is b1, where Sb1 is not original, but promoted, and where Black promoted, only to have his promoted piece captured later
The fact that the promotions are both to knight is not required by the theme (2021-03-21)
Henrik Juel: The PDB definition of Antiphönix recommends that this keyword should be deleted... (2021-03-21)
comment
Keywords: blocking of a piece, Excelsior black, Excelsior white, Phoenix, Prentos Theme (s), Pronkin Theme (S), Promotions to Knights, under-promotion (ss)
Genre: Retro
FEN: r1bqkb1r/p1pp1pp1/2n5/8/8/8/1PPP1P1P/1NRQKBNR
Reprints: H Springaren 154, p. 49, 06/2020
H The Problemist , p. 383, 07/2020
Input: Gunter Jordan, 2021-03-21
Last update: Gunter Jordan, 2023-04-03 more...
5 - P1388717
Ralf Krätschmer
R554 The Problemist 05/2020
P1388717
(11+9) C+
BP in 11.5
1. b4 f5 2. b5 f4 3. b6 f3 4. bxc7 fxg2 5. cxb8=S gxh1=D 6. Sxd7 Dd5 7. Sxf8 Dxd2+ 8. Lxd2 Dxd2+ 9. Sxd2 Kd8 10. Sxh7 Txh7 11. Tc1 Th8 12. Sb1+
play all play one stop play next play all
Moldenhauer: Computerprüfung: C+ Natch 3.3 in 5 Tage 10 Std. 49 Min. eine Lösung gefunden.
Prüfung BP in 11 u. 12, keine Lösung! (2022-08-30)
A.Buchanan: Since the position is check, the only shorter PG which requires examination is 10.5 (2022-08-30)
Moldenhauer: Computerüberprüfung: BP in 10.5 Natch 3.3 keine Lösung! Zeit 16 Std. 22 Min. (2022-09-01)
more ...
comment
Keywords: Discovered check, Unique Proof Game, Excelsior black, Excelsior white, Prentos Theme (Sd), Switchback (St), Promotion (d), under-promotion (S), x pieces capture on one square (4)
Genre: Retro
Computer test: Computerprüfung: C+ Natch 3.3 in 5 Tage 10 Std. 49 Min. eine Lösung gefunden. Prüfung BP in 11 u. 12, keine Lösung!
FEN: r1bk2nr/pp2p1p1/8/8/8/8/P1P1PP1P/1NRQKBN1
Input: Gunter Jordan, 2021-04-18
Last update: A.Buchanan, 2022-08-30 more...
6 - P1389155
Silvio Baier
Thierry Le Gleuher
Ralf Krätschmer
Roberto Osorio

169 feenschach 237, p. 239, 09-10/2019
P1389155
(11+10) C+
BP in 9.5
1. b4 f5 2. b5 f4 3. b6 f3 4. bxa7 fxg2 5. axb8=S gxh1=T 6. Sxd7 Txh2 7. Sxf8 Txf2 8. Sxh7 Txh7 9. Kxf2 Th8 10. Ke1
play all play one stop play next play all
Silvio-Baier-40-JT: Thema: Gesucht waren eindeutige orthodoxe Beweispartien mit weißer und schwarzer Homebasestellung, wobei auf jeder Seite ein Bauer umwandeln und von einer Figur (keinem Bauern) geschlagen werden sollte und zudem genau ein Stein eine zweizügige Rückkehr vollführt.
Moldenhauer: Computerprüfung: C+ Stelvio 1.4 03:05:53 Stunden. (hh:mm:ss)
Keine Lösung: BP 9.0. (2023-07-23)
comment
Keywords: Unique Proof Game, Excelsior black, Excelsior white, Homebase (2), Prentos Theme (St), Switchback (Kt), under-promotion (St)
Genre: Retro
Computer test: Stelvio 1.4
FEN: r1bqk1nr/1pp1p1p1/8/8/8/8/P1PPP3/RNBQKBN1
Input: Gunter Jordan, 2021-05-01
Last update: Silvio Baier, 2023-08-15 more...
7 - P1389187
Thierry Le Gleuher
Ralf Krätschmer
Roberto Osorio

170 feenschach 237, p. 239, 09-10/2019
P1389187
(11+11) C+
BP in 9.5
1. b4 g5 2. b5 g4 3. b6 g3 4. bxa7 gxh2 5. axb8=S hxg1=T 6. Sc6 Txg2 7. Sxd8 Txf2 8. Sxb7 Lxb7 9. Kxf2 Lc8 10. Ke1
play all play one stop play next play all
Silvio-Baier-40-JT: Thema: Gesucht waren eindeutige orthodoxe Beweispartien mit weißer und schwarzer Homebasestellung, wobei auf jeder Seite ein Bauer umwandeln und von einer Figur (keinem Bauern) geschlagen werden sollte und zudem genau ein Stein eine zweizügige Rückkehr vollführt.
Moldenhauer: Computerprüfung: C+ Stelvio 1.4 04:00:17 Stunden. (hh:mm:ss)
Keine Lösung: BP 9.0. (2023-07-23)
comment
Keywords: Unique Proof Game, Homebase (2), Prentos Theme (St), Switchback (Kl), under-promotion (St), Ceriani-Frolkin Theme (St), Prenix (S), Future Proof Game (Prentos+Sback)
Genre: Retro
Computer test: Stelvio 1.4
FEN: r1b1kbnr/2pppp1p/8/8/8/8/P1PPP3/RNBQKB1R
Input: Gunter Jordan, 2021-05-02
Last update: Silvio Baier, 2023-08-15 more...
8 - P1389374
Silvio Baier
Thierry Le Gleuher
Gunter Jordan
Raúl Jordan
Ralf Krätschmer
Roberto Osorio

175 feenschach 237, p. 240, 09-10/2019
P1389374
(11+11) C+
BP in 9.5
1. b4 f5 2. b5 f4 3. b6 f3 4. bxc7 fxg2 5. cxd8=S gxf1=L 6. Se6 Lxe2 7. Sxf8 Lxd1 8. Sxh7 Txh7 9. Kxd1 Th8 10. Ke1
play all play one stop play next play all
Silvio-Baier-40-JT: Thema: Gesucht waren eindeutige orthodoxe Beweispartien mit weißer und schwarzer Homebasestellung, wobei auf jeder Seite ein Bauer umwandeln und von einer Figur (keinem Bauern) geschlagen werden sollte und zudem genau ein Stein eine zweizügige Rückkehr vollführt.
more ...
comment
Keywords: Unique Proof Game, Excelsior black, Excelsior white, Homebase (2), Prentos Theme (Sl), Switchback (Kt), under-promotion (Sl)
Genre: Retro
Computer test: Computerprüfung: C+ Stelvio 1.4 02:01:02 Stunden.(hh:mm:ss) Keine Lösung: BP 9.0.
FEN: rnb1k1nr/pp1pp1p1/8/8/8/8/P1PP1P1P/RNB1K1NR
Input: Gunter Jordan, 2021-05-07
Last update: A.Buchanan, 2023-07-29 more...
9 - P1389383
Thierry Le Gleuher
Gunter Jordan
Raúl Jordan
Roberto Osorio

176 feenschach 237, p. 240, 09-10/2019
P1389383
(11+11) C+
BP in 9.5
1. f4 h5 2. f5 h4 3. f6 h3 4. fxg7 hxg2 5. gxf8=S gxf1=L 6. Se6 Lxe2 7. Sxd8 Lxd1 8. Sxb7 Lxb7 9. Kxd1 Lc8 10. Ke1
play all play one stop play next play all
Silvio-Baier-40-JT: Thema: Gesucht waren eindeutige orthodoxe Beweispartien mit weißer und schwarzer Homebasestellung, wobei auf jeder Seite ein Bauer umwandeln und von einer Figur (keinem Bauern) geschlagen werden sollte und zudem genau ein Stein eine zweizügige Rückkehr vollführt.
more ...
comment
Keywords: Unique Proof Game, Excelsior black, Excelsior white, Homebase (2), Prentos Theme (Sl), Switchback (Kl), under-promotion (Sl)
Genre: Retro
Computer test: Computerprüfung: C+ Stelvio 1.4 04:29:10 Stunden.(hh:mm:ss) Keine Lösung: BP 9.0.
FEN: rnb1k1nr/p1pppp2/8/8/8/8/PPPP3P/RNB1K1NR
Input: Gunter Jordan, 2021-05-08
Last update: A.Buchanan, 2023-07-29 more...
10 - P1389414
Silvio Baier
Thierry Le Gleuher

177 feenschach 237, p. 240, 09-10/2019
P1389414
(11+11) C+
BP in 11.0
1. h4 g5 2. hxg5 h5 3. g6 h4 4. g7 h3 5. gxf8=S hxg2 6. Se6 gxf1=L 7. Sxd8 Lxe2 8. Sc6 Lxd1 9. Kxd1 Sa6 10. Ke1 Tb8 11. Sxb8 Sxb8
play all play one stop play next play all
Silvio-Baier-40-JT: Thema: Gesucht waren eindeutige orthodoxe Beweispartien mit weißer und schwarzer Homebasestellung, wobei auf jeder Seite ein Bauer umwandeln und von einer Figur (keinem Bauern) geschlagen werden sollte und zudem genau ein Stein eine zweizügige Rückkehr vollführt.
more ...
comment
Keywords: Unique Proof Game, Excelsior black, Excelsior white, Homebase (2), Prentos Theme (Sl), Switchback (Ks), under-promotion (Sl)
Genre: Retro
Computer test: Computerprüfung: C+ Stelvio 1.4 in 147:48:36 Stunden. (hh:mm:ss) Keine Lösung: BP 10.5 in 39:42:33 Stunden.
FEN: 1nb1k1nr/pppppp2/8/8/8/8/PPPP1P2/RNB1K1NR
Input: Gunter Jordan, 2021-05-09
Last update: A.Buchanan, 2023-08-08 more...
11 - P1389442
Silvio Baier
Thierry Le Gleuher

178 feenschach 237, p. 240, 09-10/2019
P1389442
(12+12) C+
BP in 9.5
1. g4 f5 2. g5 f4 3. g6 f3 4. gxh7 fxe2 5. hxg8=S exf1=L 6. Sh6 Ld3 7. Sf7 Lxc2 8. Sxd8 Kxd8 9. Dxc2 Ke8 10. Dd1
play all play one stop play next play all
Silvio-Baier-40-JT: Thema: Gesucht waren eindeutige orthodoxe Beweispartien mit weißer und schwarzer Homebasestellung, wobei auf jeder Seite ein Bauer umwandeln und von einer Figur (keinem Bauern) geschlagen werden sollte und zudem genau ein Stein eine zweizügige Rückkehr vollführt.
Moldenhauer: Computerprüfung: C+ Stelvio 1.4 in 00:04:33 Minuten. (hh:mm:ss)
Keine Lösung: BP 9.0. (2023-07-22)
comment
Keywords: Unique Proof Game, Excelsior black, Excelsior white, Homebase (2), Prentos Theme (Sl), Switchback (Dk), under-promotion (Sl)
Genre: Retro
Computer test: Stelvio 1.4
FEN: rnb1kb1r/ppppp1p1/8/8/8/8/PP1P1P1P/RNBQK1NR
Input: Gunter Jordan, 2021-05-10
Last update: Silvio Baier, 2023-08-15 more...
12 - P1389465
Silvio Baier
Roberto Osorio

179 feenschach 237, p. 240, 09-10/2019
P1389465
(12+11) C+
BP in 9.5
1. h4 f5 2. h5 f4 3. h6 f3 4. hxg7 fxe2 5. gxf8=S exf1=L 6. Sg6 Ld3 7. Sxe7 Lxc2 8. Sxc8 Dxc8 9. Dxc2 Dd8 10. Dd1
play all play one stop play next play all
Silvio-Baier-40-JT: Thema: Gesucht waren eindeutige orthodoxe Beweispartien mit weißer und schwarzer Homebasestellung, wobei auf jeder Seite ein Bauer umwandeln und von einer Figur (keinem Bauern) geschlagen werden sollte und zudem genau ein Stein eine zweizügige Rückkehr vollführt.
more ...
comment
Keywords: Unique Proof Game, Excelsior black, Excelsior white, Homebase (2), Prentos Theme (Sl), Switchback (Dd), under-promotion (Sl)
Genre: Retro
Computer test: C+ Euclide 1.01 (more than 2 hours) Natch 3.1 found no solutions in 9.0 moves
FEN: rn1qk1nr/pppp3p/8/8/8/8/PP1P1PP1/RNBQK1NR
Input: Gunter Jordan, 2021-05-11
Last update: Silvio Baier, 2024-01-24 more...
13 - P1390560
Geir Sune Tallaksen Østmoe
Discord Chess Problems & Studies Server 02/05/2021
4. Platz
Discord Composition Tourney 1
P1390560
(14+5)
#1
b) wKf5->e1
c) wKf5->g1
a) 1. dxe6ep#
b) 1. 0-0#
c) 1. f8=D,T#
play all play one stop play next play all
Henrik Juel: Black captured [Lc1] and b7xDa6, so in part a) last move was e7-e5
1.dxe6ep#, 1.0-0#, 1.f8=DT# (2021-06-08)
comment
Keywords: Valladao Task, Castling as mating move, En passant, Tolerated dual promotion, under-promotion (T)
Genre: Retro
FEN: B7/p4P2/p7/P2PpK2/6P1/3P1kpP/1P1P2R1/2NN3R
Input: A.Buchanan, 2021-06-08
Last update: Alfred Pfeiffer, 2021-09-30 more...
14 - P1390567
Andrew Buchanan
Discord Chess Problems & Studies Server 02/05/2021
P1390567
(12+12) C+
#1
PG in 8.0
1. h2-h4 Sb8-c6 2. h4-h5 Sc6-d4 3. h5-h6 Sd4xe2 4. h6xg7 Se2-g3 5. g7xh8=S Sg3xh1 6. Sh8xf7 Sh1xf2 7. Ke1xf2 Ke8xf7 8. Kf2-e1 Kf7-e8 9. Dh5#
play all play one stop play next play all
Henrik Juel: The proof game was harder to solve than the #1...
more ...
comment
Keywords: Unique Proof Game, Homebase (2), under-promotion (S), Excelsior white
Genre: Retro
Computer test: Euclide 1.01
FEN: r1bqkbn1/ppppp2p/8/8/8/8/PPPP2P1/RNBQKBN1
Input: A.Buchanan, 2021-06-08
Last update: Alfred Pfeiffer, 2021-09-30 more...
15 - P1391291
Pascal Wassong
Messigny 1998
4. Preis
P1391291
(14+14) C+
BP in 13.5
1. a4 d5 2. Ta3 Lg4 3. Te3 Lf3 4. exf3 Kd7 5. Lb5 Kd6 6. Se2 d4 7. 0-0 d3 8. Kh1 dxe2 9. d4 exf1=L 10. d5 Ld3 11. Te2 Lf5 12. Dd3 Lc8 13. Lf4+ e5 14. dxe6ep+
play all play one stop play next play all
A.Buchanan: 14. ... Kc5! would move beyond the diagram check. (2021-07-31)
more ...
comment
Keywords: Unique Proof Game, Valladao Task, Castling, En passant, under-promotion (l), Pronkin Theme (l)
Genre: Retro
Computer test: C+ Euclide 1.01, no solution in 12.5
FEN: rnbq1bnr/ppp2ppp/3kP3/1B6/P4B2/3Q1P2/1PP1RPPP/1N5K
Reprints: Problemesis 4 08/1998
M4 Phénix 66, p. 4112, 09/1998
13 Orbit 30, p. 318, 04/2006
Input: A.Buchanan, 2021-07-03
Last update: Alfred Pfeiffer, 2021-11-26 more...
16 - P1391292
Viktor Peretyatko
R307 The Problemist , p. 28, 01/2001
P1391292
(14+9) C+
BP in 12.5
1. e4 d5 2. exd5 Sc6 3. dxc6 Ld7 4. cxb7 Lb5 5. b8=S Dd7 6. Sxd7 0-0-0 7. Sxf8 Txd2 8. Sxh7 Txh7 9. g4 Th5 10. Lh3 Te2 11. Kf1 Tc5 12. g5+ f5 13. gxf6ep+
play all play one stop play next play all
more ...
comment
Keywords: Unique Proof Game, Valladao Task, Castling, En passant, under-promotion (S), Ceriani-Frolkin Theme (S), Prentos Theme (S)
Genre: Retro
Computer test: C+ Euclide 1.01, no solution in 11.5
FEN: 2k3n1/p1p1p1p1/5P2/1br5/8/7B/PPP1rP1P/RNBQ1KNR
Reprints: 9 Orbit 30, p. 317, 04/2006
Input: A.Buchanan, 2021-07-03
Last update: Alfred Pfeiffer, 2021-11-26 more...
17 - P1391293
Ayako Okaya
R003 Problem Paradise 13 03/1999
P1391293
(11+15) C+
BP in 11.0
1. d3 e6 2. Lh6 Dh4 3. Dd2 g5 4. Dc3 Lxh6 5. Dxh8 Kf8 6. Dg7+ Kxg7 7. Sa3 Kh8 8. 0-0-0 g4 9. f4 gxf3ep 10. Td2 fxe2 11. g4 exf1=T#
play all play one stop play next play all
more ...
comment
Keywords: Unique Proof Game, Valladao Task, Castling, En passant, under-promotion (t), Phoenix (t)
Genre: Retro
Computer test: C+ Euclide 1.01, no solution in 10.0
FEN: rnb3nk/pppp1p1p/4p2b/8/6Pq/N2P4/PPPR3P/2K2rNR
Reprints: 3 Orbit 30, p. 216, 04/2006
Input: A.Buchanan, 2021-07-03
Last update: Alfred Pfeiffer, 2021-11-26 more...
18 - P1391294
Per Grevlund
251 Problemskak 6 04-06/2009
to L.Larsen for his 90 years
6. Lob
Problemskak 2008-10
P1391294
(11+13) C+
BP in 11.0
1. g4 b5 2. g5 b4 3. g6 b3 4. gxh7 bxa2 5. hxg8=S axb1=S 6. Sh6 Sxd2 7. Kxd2 g5 8. Ke3 Lxh6 9. Ld2 0-0 10. Dc1 g4 11. f4 gxf3ep+
play all play one stop play next play all
more ...
comment
Keywords: Unique Proof Game, Valladao Task, Castling (sk), En passant (s), under-promotion (Ss), Ceriani-Frolkin Theme (Ss), Prentos Theme (Ss), Phoenix (s), Prenix (S)
Genre: Retro
Computer test: C+ Euclide 1.01, no solution in 10.0
FEN: rnbq1rk1/p1pppp2/7b/8/8/4Kp2/1PPBP2P/R1Q2BNR
Reprints: Problemskak 21 2013
Input: A.Buchanan, 2021-07-03
Last update: Björn Enemark, 2022-08-07 more...
19 - P1391295
Andreas Thoma
17289 Die Schwalbe 288 12/2017
P1391295
(13+12) C+
BP in 13.5
1. b4 g5 2. b5 g4 3. b6 g3 4. bxa7 gxh2 5. axb8=S hxg1=S 6. Sxd7 Sxe2 7. Sc5 Sc3 8. Se4 Kd7 9. Dh5 Ke6 10. g4 Ld7 11. Lh3 Le8 12. 0-0 Dd7 13. g5+ f5 14. gxf6ep#
play all play one stop play next play all
more ...
comment
Keywords: Unique Proof Game, Valladao Task, Castling (wk), En passant, under-promotion (Ss), Phoenix (s), Prenix (S)
Genre: Retro
Computer test: C+ Euclide 1.01, no solution in 12.5
FEN: r3bbnr/1ppqp2p/4kP2/7Q/4N3/2n4B/P1PP1P2/RNB2RK1
Input: A.Buchanan, 2021-07-03
Last update: Alfred Pfeiffer, 2021-11-26 more...
20 - P1391296
Jonathan Mestel
WCCC Ohrid 09/2018
2. ehrende Erwähnung
Champagne Tourney, 2018
P1391296
(15+13) C+
BP in 13.5
1. c4 h5 2. Db3 h4 3. Kd1 h3 4. Kc2 hxg2 5. Sh3 g1=S 6. Lg2 Sf6 7. Lc6 Sf3 8. Tg1 Se4 9. Txg7 f6 10. Tg1 Lg7 11. exf3 0-0 12. c5+ d5 13. cxd6ep+ Tf7 14. d7
play all play one stop play next play all
more ...
comment
Keywords: Unique Proof Game, Valladao Task, Castling (sk), En passant, under-promotion (s), Ceriani-Frolkin Theme (s)
Genre: Retro
Computer test: C+ Euclide 1.01, no solution in 13.0 or 12.5
FEN: rnbq2k1/pppPprb1/2B2p2/8/4n3/1Q3P1N/PPKP1P1P/RNB3R1
Input: A.Buchanan, 2021-07-03
Last update: Marcin Banaszek, 2023-09-29 more...
21 - P1391297
Marek Kolcak
WCCC Ohrid 09/2018
1. ehrende Erwähnung
Champagne Tourney, 2018
P1391297
(12+15) C+
BP in 12.5
1. f4 c5 2. f5 Da5 3. f6 Kd8 4. fxe7 Kc7 5. e8=T b6 6. Te3 La6 7. Th3 Lxe2 8. Sf3 Lxd1 9. Le2 c4 10. 0-0 Lc5+ 11. d4 cxd3ep+ 12. Tf2 Lxf2+ 13. Kf1
play all play one stop play next play all
more ...
comment
Keywords: Unique Proof Game, Valladao Task, Castling, En passant, under-promotion (T), Prenix (T)
Genre: Retro
Computer test: C+ Euclide 1.01, no solution in 12.0 or 11.5
FEN: rn4nr/p1kp1ppp/1p6/q7/8/3p1N1R/PPP1BbPP/RNBb1K2
Input: A.Buchanan, 2021-07-03
Last update: Marcin Banaszek, 2023-09-29 more...
22 - P1391298
Ladislav Packa
Emil Klemanic
Michal Dragoun
Ladislav Salai

WCCC Ohrid 09/2018
2. Lob
Champagne Tourney, 2018
P1391298
(15+12) C+
BP in 11.5
1. h4 e6 2. h5 Dh4 3. c3 Dc4 4. f4 Lb4 5. f5 Se7 6. f6 0-0 7. fxe7 Sc6 8. exf8=S Se7 9. Sxh7 Kxh7 10. Dc2 Kh6 11. d4 g5 12. hxg6ep+
play all play one stop play next play all
Henrik Juel: Thanks for posting this nice set of Valladao proof games, Andrew (2021-07-03)
A.Buchanan: Welcome Henrik - it's a popular and accessible theme :) (2021-07-03)
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Keywords: Unique Proof Game, Valladao Task, Castling, En passant, under-promotion (S), Ceriani-Frolkin Theme (S), Prentos Theme (S)
Genre: Retro
Computer test: C+ Euclide 1.01, no solution in 10.5
FEN: r1b5/ppppnp2/4p1Pk/8/1bqP4/2P5/PPQ1P1P1/RNB1KBNR
Input: A.Buchanan, 2021-07-03
Last update: Marcin Banaszek, 2023-09-29 more...
23 - P1391300
Igor Vereshchagin
Michel Caillaud

IV Phénix 206, p. 8574, 06/2011
P1391300
(15+12) C+
BP in 15.5
1. e2-e4 c7-c5 2. Lf1-d3 c5-c4 3. Sg1-e2 c4-c3 4. 0-0 c3xd2 5. c2-c4 e7-e6 6. Se2-c3 Lf8-a3 7. Dd1-e2 d2-d1=S 8. f2-f4 Sd1-f2 9. b2xa3 Sf2-h3 10. g2xh3 Ke8-e7 11. Tf1-f2 Ke7-f6 12. Kg1-f1 Kf6-g6 13. e4-e5 f7-f5 14. e5xf6ep Kg6-h6 15. f4-f5 g7-g5 16. f5xg6ep#
play all play one stop play next play all
more ...
comment
Keywords: Unique Proof Game, Valladao Task, Castling, En passant (2), under-promotion (s), Ceriani-Frolkin Theme (s)
Genre: Retro
Computer test: Euclide 1.01, no solution in 14.5
FEN: rnbq2nr/pp1p3p/4pPPk/8/2P5/P1NB3P/P3QR1P/RNB2K2
Reprints: 791 Problemskak 17, p. 9, 2012
Input: A.Buchanan, 2021-07-03
Last update: Alfred Pfeiffer, 2021-11-26 more...
24 - P1391301
Brian E. Chamberlain
R450 The Problemist 09/2012
dedicated to J.Ling
P1391301
(12+14) C+
BP in 16.0
1. Sb1-c3 Sg8-f6 2. Sc3-d5 Sf6-e4 3. Sd5xe7 Se4xd2 4. Ke1xd2 a7-a5 5. Kd2-c3 a5-a4 6. Kc3-b4 Sb8-a6 7. Kb4-a5 Lf8xe7 8. e2-e4 0-0 9. Dd1-h5 f7-f5 10. Lf1-e2 f5-f4 11. Le2-g4 f4-f3 12. Sg1-e2 f3xe2 13. Th1-d1 Tf8-f3 14. Td1-d5 Tf3-a3 15. Td5-b5 e2-e1=L+ 16. b2-b4 a4xb3ep#
play all play one stop play next play all
more ...
comment
Keywords: Unique Proof Game, Valladao Task, Castling, En passant, under-promotion (l), Non-standard material (l)
Genre: Retro
Computer test: Euclide 1.01, no solution in 15.0
FEN: r1bq2k1/1pppb1pp/n7/KR5Q/4P1B1/rp6/P1P2PPP/R1B1b3
Input: A.Buchanan, 2021-07-03
Last update: Alfred Pfeiffer, 2021-11-26 more...
25 - P1391304
Ivan Denkovski
76 feenschach 183, p. 382, 08/2010
Lob
P1391304
(13+13) C+
BP in 24.0
1. h2-h4 a7-a5 2. h4-h5 Ta8-a6 3. h5-h6 Ta6-e6 4. h6xg7 Te6-e3 5. f2xe3 h7-h5 6. Ke1-f2 Sg8-h6 7. g7-g8=L Lf8-g7 8. Kf2-g3 Lg7-e5 9. Kg3-h3 f7-f6 10. Lg8-b3 h5-h4 11. c2-c4 0-0 12. Sb1-a3 Dd8-e8 13. Sa3-c2 De8-h5 14. c4-c5 Sh6-f7 15. c5-c6 Sb8-a6 16. c6xb7 c7-c5 17. a2-a3 c5-c4 18. Ta1-a2 c4-c3 19. Sc2-a1 c3-c2 20. b7-b8=D c2xd1=T 21. Db8-c7 Td1xf1 22. Dc7-c2 Tf1-f2 23. Dc2-d1 d7-d5 24. g2-g4 h4xg3ep#
play all play one stop play next play all
Henrik Juel: Euclide 1.01 found the solution quickly, but later got stuck on pos. 112, and I killed the program after some 20 hours (2021-07-04)
A.Buchanan: Congratulations Henrik you have invented the concept of "HC++" (2021-07-04)
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Keywords: Unique Proof Game, Valladao Task, Castling, En passant, under-promotion (Lt), Promotion (D), Pronkin Theme (D), Phoenix (t), Prenix (LD)
Genre: Retro
Computer test: Stelvio 1.5, in 2sec.
FEN: 2b2rk1/4pn2/n4p2/p2pb2q/8/PB2P1pK/RP1PPr2/N1BQ2NR
Reprints: feenschach 212 04/2015
Input: A.Buchanan, 2021-07-03
Last update: Reto, 2023-08-19 more...
26 - P1393552
Eric Pichouron
France-Echecs 2020
P1393552
(13+15)
BP in 15.0
1. e4 d5 2. Dg4 Lxg4 3. e5 Kd7 4. e6+ Kc8 5. exf7 e5 6. f4 Ld6 7. f8=S h5 8. Sd7 h4 9. Sb6+ axb6 10. f5 Sd7 11. f6 Kb8 12. f7 Ka7 13. f8=D Tb8 14. Df3 Ka8 15. Dd1 Lxd1
play all play one stop play next play all
Henrik Juel: C++ Euclide 1.01 (2021-09-07)
comment
Keywords: Antiphönix (DS), Ceriani-Frolkin Theme (S), Excelsior white, Prentos Theme (D), Pronkin Theme (D), Promotion (D), under-promotion (S)
Genre: Retro
FEN: kr1q2nr/1ppn2p1/1p1b4/3pp3/7p/8/PPPP2PP/RNBbKBNR
Reprints: III Phénix 317-318 04-05/2021
Input: Gunter Jordan, 2021-09-07
Last update: Gunter Jordan, 2021-09-07 more...
27 - P1396100
Mario Parrinello
P0512 StrateGems 94 04-06/2021
P1396100
(14+14) C+
BP in 13.5
1. b3 f5 2. Lb2 f4 3. Le5 f3 4. Sc3 fxg2 5. f4 gxf1=S 6. Sf3 Se3 7. dxe3 g5 8. Dd5 g4 9. 0-0-0 g3 10. Td3 g2 11. Thd1 g1=S 12. Se1 Sf3 13. h4 Sd4 14. exd4
play all play one stop play next play all
Henrik Juel: Nice trick: d2xSe3xSd4 (2021-11-22)
comment
Keywords: Ceriani-Frolkin Theme (ss), Excelsior black, Homebase (s), Castling, Promotions to Knights, under-promotion (ss)
Genre: Retro
FEN: rnbqkbnr/ppppp2p/8/3QB3/3P1P1P/1PNR4/P1P1P3/2KRN3
Input: Gunter Jordan, 2021-11-22
Last update: Gunter Jordan, 2021-11-22 more...
28 - P1398688
Rustam Ubaidullajew
R548 The Problemist 01/2020
P1398688
(15+15)
BP in 10.0
1. e3 h6 2. Ke2 h5 3. Kf3 h4 4. Kg4 Sh6+ 5. Kh5 h3 6. Dg4 hxg2 7. Sf3 g1=S 8. h4 Sh3 9. d3 Sg5 10. hxg5 Sg8#
play all play one stop play next play all
SCHRECKE: C+, Jacobi v0.7.5 (2022-01-27)
Henrik Juel: Euclide 1.01 is probably faster than Jacobi here (1 second)
But testing time is not really an issue in such a short problem (2022-01-27)
comment
Keywords: discovered checkmate, Battery creation, Batteriematt vertikal, Ceriani-Frolkin Theme, Unique Proof Game, Excelsior black, Homebase (s), Switchback (s), under-promotion (s)
Genre: Retro
FEN: rnbqkbnr/ppppppp1/8/6PK/6Q1/3PPN2/PPP2P2/RNB2B1R
Input: Gunter Jordan, 2022-01-27
Last update: Gunter Jordan, 2022-01-27 more...
29 - P1399880
Anirudh Daga
9191 Phénix 325 12/2021
P1399880
(14+11)
BP in 11.5
1. d4 e5 2. dxe5 Df6 3. exf6 d5 4. fxg7 f5 5. gxh8=T Kf7 6. Dxd5+ Kg7 7. Lh6+ Kxh8 8. e3 f4 9. Lb5 f3 10. Se2 fxe2 11. Kd2 e1=T 12. Kd3
play all play one stop play next play all
Henrik Juel: C++ Euclide 1.01 (2022-03-20)
more ...
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Keywords: Excelsior black, Excelsior white, konsekutive Umwandlungen 2 (Tt), Phoenix, Schnoebelen Theme (T), Promotions to rooks, under-promotion (Tt)
Genre: Retro
Computer test: Natch 3.3
FEN: rnb2bnk/ppp4p/7B/1B1Q4/8/3KP3/PPP2PPP/RN2r2R
Input: Gunter Jordan, 2022-03-19
Last update: A.Buchanan, 2022-03-20 more...
30 - P1408505
Mario Velucchi
L'Italia Scacchistica 1997
P1408505
(14+13) C+
BP in 6.5
2.1...
1) 1. f4 Sh6 2. f5 Sxf5 3. g3 Sxg3 4. Lh3 f5 5. Lxf5 Sf1 6. Lxh7 g6 7. Lxg6#
2) 1. f4 g5 2. fxg5 f5 3. g6 f4 4. gxh7 f3 5. hxg8=L fxg2 6. Lh7 gxf1=S 7. Lg6#
play all play one stop play next play all
Henrik Juel: C+ Stelvio 1.0 (2023-03-25)
comment
Keywords: Excelsior black (in 2), Excelsior white (in 2), konsekutive Umwandlungen 2 (Ls in 2), under-promotion (Ls in 2)
Genre: Retro
Computer test: Stelvio 1.0
FEN: rnbqkb1r/ppppp3/6B1/8/8/8/PPPPP2P/RNBQKnNR
Reprints: StrateGems 1, p. 29, 01-02/1998
Input: Gunter Jordan, 2023-03-25
Last update: Silvio Baier, 2023-03-27 more...
31 - P1408506
Noam D. Elkies
StrateGems 1, p. 29, 01-02/1998
P1408506
(15+14) C+
BP in 8.5
1. e4 a5 2. La6 bxa6 3. e5 Lb7 4. e6 Dc8 5. exf7+ Kd8 6. fxg8=L Ke8 7. c3 Dd8 8. Db3 Lc8 9. Lf7#
play all play one stop play next play all
Originalquelle lt. SG 1: Retros list 1998
Henrik Juel: C+ Stelvio 1.0 (2023-03-25)
comment
Keywords: Excelsior white, Phoenix, Switchback (kdl), Rückkehr nach Umwandlung (B/L), under-promotion (L)
Genre: Retro
Computer test: Stelvio 1.0
FEN: rnbqkb1r/2pppBpp/p7/p7/8/1QP5/PP1P1PPP/RNB1K1NR
Input: Gunter Jordan, 2023-03-25
Last update: Silvio Baier, 2023-03-27 more...
32 - P1411646
Aleksandr Semenenko
FIDE World Cup 2023
A. Frolkin zum 65. Geb. gewidmet
2. ehrende Erwähnung
P1411646
(15+15) C+
BP in 13.5
2.1...
1) 1. Sf3 a5 2. Sd4 a4 3. Sb3 axb3 4. e4 Ta4 5. Lb5 Tc4 6. a4 e6 7. a5 Lc5 8. a6 Se7 9. a7 Tf8 10. a8=S La7 11. Sb6 c5 12. Sxd7 b6 13. La4 La6 14. Sf6#
2) 1. e4 a5 2. Lc4 a4 3. Lb3 axb3 4. Sf3 Ta4 5. Se5 Tc4 6. a4 e6 7. a5 Lc5 8. a6 Se7 9. a7 Tf8 10. a8=L La7 11. Sxd7 b6 12. Lc6 La6 13. La4 c5 14. Sf6#
play all play one stop play next play all
A.Buchanan: Gunter what do you mean by Antiphoenix, please? Seems just 2xPhoenix to me… (2023-08-07)
Joost de Heer: Antiphoenix is a deprecated keyword and should not be used anymore. (2023-08-07)
A.Buchanan: I completely agree Joost, but it clearly means something to Gunter who uses it from time to time, and I would like to understand him (2023-08-07)
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comment
Keywords: discovered checkmate, Antiphönix, double-check mate, Unique Proof Game, Excelsior white, Exchange of Promotions, under-promotion (S,L), Phoenix (S,L)
Genre: Retro
Computer test: C+ Stelvio 1.4 (no solution in 12.5)
FEN: 1n1qkr2/b3nppp/bp2pN2/2p5/B1r1P3/1p6/1PPP1PPP/RNBQK2R
Reprints: zu 19208 Die Schwalbe 321, p. 177, 06/2023
Input: Gunter Jordan, 2023-08-06
Last update: A.Buchanan, 2023-08-08 more...
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