Die Schwalbe

8 problem(s) found in 2000 milliseconds (displaying 8 problem(s)). [COMMENTDATE>=20200919 AND NOT K='Hilfsrückzüger' AND K='goldenes Zeitalter'] [download as LaTeX]

1 - P0008793
Andrej N. Kornilow
Shakhmaty v SSSR 1978
P0008793
(15+8)
#1.5
1. Ta1-d1+? (Completing the castling!)
a) 1. ... Td4 2. Txd4#
0) 1. xc5ep+? (Completing en passant!)
b) 1. ... Tb5 2. Txb5#
0) 1. xe8=S+? (Completing the promotion!)
c) 1. ... e6 2. Sf6#

0) 1. Sxe7+! Lxe7 2. f8=B# (Omitting the promotion!)
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Henrik Juel: Completing the key isn't legal, 1.'Rd1'/'-bPc5'/'e8S'+, but omitting the promotion in the mating move is, 1.Sxe7+ Bxe7 2.'f8'#. Excellent joke. (2003-09-19)
James Malcom: A very witty joke Valladao! (2020-09-24)
A.Buchanan: Really like this joke (2020-09-25)
Henrik Juel: To see the illegality of completing 1.fxe8=S+?, note the captures:
Black captured fxDe, so [Pg7,h7] were captured on their files, while the other six missing black men were captured by white pawns
The illegality of completing 1.0-0-0,bxc6ep? is rather obvious (2020-09-26)
James Malcom: And for those you don't find it obvious: If the White king hasn't moved, then where did wRa5, and wBb8 if bPb5 has just done a double-step, come from? Neither can be promoted pieces, as White still has all eight pawns. Trying to finish castling and en passant therefore both produce illegal positions and thus cannot be the solution. (2020-09-26)
Henrik Juel: Continuing beating the dead horse...
How does the white player actually perform an entire move?
1.0-0-0+: Ke1-c1 and Ta1-d1
1.bxc6ep+: Pb5-c6 and remove sPc5
1.fxe8=S+: remove sYe8 and Pf7-e8 and replace wPe8 with wSe8 (three fractional actions)
2.f8=Y#: Pf7-f8 and replace wPf8 with wYf8
So a marginally better stipulation might be: 'White to move mates in less than 2 moves' (2020-09-26)
A.Buchanan: I've tried to set up some intermediate diagrams to allow us to show the animation, but the pieces seem to move even for words which are not moves (and marked italic/red). It's quite baffling. It's almost as if someone with privilege has gone in the background and assigned moves to those dead words. If so, that's extremely unhelpful. Gerd was quite active on this site for a month in German lockdown, for which I'm grateful, but one key task is still waiting: to empower the editors by documenting exactly how the animation decides what to do based on the diagram(s) and stipulation. (2020-09-27)
A.Buchanan: The PDB stipulation field should be non-text form to drive the animation. Where the stipulation is non-standard, there should be a Unicode representation of the original, and translations into German, English and French. But cannot overwrite any original non-standard stipulation, in my opinion, as it is part of the composer's work. (2020-09-27)
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comment
Keywords: En passant, Halber Zug, Castling, Promotion, Valladao Task (half!), Joke, Dummy Pawn, Golden Age
Genre: Retro, n#
FEN: 1B1N1bB1/p2ppP2/2P5/R1pk1N2/1r2p3/1P2P1P1/4PP1P/R1K5
Reprints: (III) Quartz 4 1997
Input: Gerd Wilts, 1997-06-21
Last update: James Malcom, 2021-06-18 more...
2 - P1377133
Robert Norman
Jens Kristiansen

Far off Chess 13/12/2008
RN, Version JK
P1377133
(3+6) C+
#4
1. Kf7! droht 2. Txh5#
1. ... Sd6+,Sd8+ 2. g7+ Kh7 3. g8=D+ Kh6 4. Dg7#
play all play one stop play next play all
A beautiful version of P1377131

http://faroffchess.blogspot.com/2008/12/in-twilight-zone-of-chess-rules.html

"Ok, you may say that this is all old stuff, very entertaining but with no relevance for nowadays chess. So? Well, look at this endgame study which circulated among the chess insiders in the 80s:

White to move and win - my version (from memory)

I believe I have read somewhere that the composer is from Dar-Es-Salaam, but I can not find sources for that.

The solution is: 1. Kf7, Nd6+ 2. g7+!, Kh7 3. g8D+ and mate next move.

Then you may object that white is in check, in fact a double check, when he unaffectedly moves his little pawn at the second move. Yes, he is in check BEFORE the move, but is he after? You see, at that time the rules stated that the king is in check "...when the square it occupies is threatened by one or TWO of the opponents pieces." So the check is elegantly parried by making the kings square threatened by THREE pieces!

Relax, nowadays the rules state that the square in question must be threatened by "... if one or more of the opponents pieces."
James Malcom: What is the Winchloe solution then, even with duals? Of course, as an endgame study, it is still correct. (2020-11-13)
A.Buchanan: As a #4, WinChloe gives: 1.Rf7! [2.T×h5‡]
1…Cd8+ 2.g7+ Rh7 3.g8=D+ Rh6 4.Dg7‡
1…Cd6+ 2.g7+ Rh7 3.g8=D+ Rh6 4.Dg7‡
Switchback blanc
Switchback de Pion
Echecs croisés
Guidelli
Echec double
Batterie noire
Auto-clouage indirect
Déclouage indirect
Promotion
Clé désampliative (2020-11-26)
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comment
Keywords: Golden Age, Joke, Bosma, Promotion (D)
Genre: n#
Computer test: C+ WinChloe v3.51
FEN: 7k/rn6/5KP1/p1p4b/8/8/8/7R
Input: James Malcom, 2020-06-20
Last update: A.Buchanan, 2020-11-26 more...
3 - P1380245
Fritz Porten
Wiener Morgenzeitung 08/06/1924
P1380245
(10+5) C+
#4
1. exf8=D,T? Patt!
1. exf8=L? Sxf6! 2. Sxf6 Patt
1. exf8=S? Sxf6! 2. Sxf6 Kxg7 3. Le5 Patt

1. exf8=B! Sxf6+ 2. Sxf6 Kxg7 3. Le5 Kg6 4. Dg3#
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Das tapfere Bäuerlein
In Reih und Glied stand das Bäuerlein und wartete ungeduldig auf den Beginn der Schlacht. Endlich gings los. Kampfesmutig schoß es vor, e2-e4; es war ja ein stolzer Königsbauer. Bald war es im Zentrum des Gefechts und hielt den schwersten Angriffen stand. Rechts und links fielen seine Brüder, sogar Offiziere fanden den Heldentod, aber unerschütterlich drang das Bäuerlein vorwärts, e4-e5 hurrah!
Diesem kühnen Vorstoß war es hauptsächlich zu verdanken, daß die feindliche Armee geschlagen wurde. Der schwarze König hatte sich mit dem Rest seiner Getreuen in die äußerste Ecke des Schlachtfeldes zurückgezogen, seine Lage war trostlos [Diagramm].
In ihrer Verzweiflung warf sich die edle schwarze Dame den heranstürmenden weißen Truppen entgegen, um vielleicht noch durch ein Pattmanöver die ihrigen zu retten.
Das tapfere Bäuerlein war inzwischen bis auf die 7. Reihe vorgedrungen. Nun stand es vor der größten Aufgabe seines Lebens. Es sollte die feindliche Dame, die mächtige schwarze Königin gefangen nehmen. Dies wäre aber auch sein letzter Triumph gewesen, denn auf der 8. Reihe würde ihm sein Feldherr sicher den Abschied geben und für einen Offizier eintauschen. Die weißen Offiziere atmeten auf, der gemeine Bauer, der sich durch seine mutigen Taten der besonderen Gunst des Feldherrn erfreute, war ihnen schon lange ein Dorn im Auge.
Der Feldherr, der große Schachmeister, überlegte diesmal sehr lange.
Spielte er 1. exf=D so patt
oder 1. exf=T so patt
oder 1. exf=L so Sxf6+ 2. Sxf6 patt
oder 1. exf=S so Sxf6+ 2. Sxf6 Kxg7 3. L-e5 patt
Also kein Offizier konnte ihm jetzt zweckmäßig dienen, so entschloß er sich denn, den braven Bauer noch auf der 8. Reihe beizubehalten und, siehe da, er erreichte dadurch auf schnellste Weise den Sieg:
1. exf=B!! Sxf6
2. Sxf6 Kxg7
3. L-e5 K-g6
4. D-g3 matt
So war das tapfere Bäuerlein das einzige in der Geschichte des Schachspiels, das noch auf der letzten Reihe mit vollem Recht seine Wesensart beibehielt. Ehre seinem Angedenken!
James Malcom: Thank you for this marvelous find, Mario! This is another ingenious directmate in this field!. The stalemating ideas are very unique and pleasing. (2020-09-26)
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Keywords: Joke (Not!), Dummy Pawn, Golden Age
Genre: n#
Computer test: Popeye 4.85
FEN: 5qnk/4PpRN/5P2/8/p3K3/Q7/P5PB/7R
Input: Mario Richter, 2020-09-25
Last update: Alfred Pfeiffer, 2020-09-26 more...
4 - P1381345
James Malcom
(36) MatPlus.net Forum 14/10/2020
P1381345
(13+11) C+
BP in 9.5
(-:
1. f4 h5 2. f5 h4 3. f6 h3 4. fxe7 hxg2 5. exf8=B gxh1=T 6. Lg2 Ke7 7. Lxb7 Ke6 8. Lxa8 Se7 9. Lb7 Txf8 10. Lxc8
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http://matplus.net/start.php?px=1603899391&app=forum&act=posts&tid=2475&fid=gen&page=1
James Malcom: The point of this PG was to make a true Belfort, after the lone bishop in P1379376 was pointed out to not be a true Belfort. (2020-10-28)
A.Buchanan: I think the notion of a Belfort piece is the foundation idea. Then the question of whether a composition is a Belfort is derived from that, and should include other criteria as well. The original tourney succeeded in launching this idea, but we are surely allowed to clean up the position definition. I will check in the Encyclopedia (2020-10-30)
A.Buchanan: Belfort is not in the Encyclopedia! (2020-10-30)
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Keywords: Joke (Not!), Schnoebelen Theme (B), Dummy Pawn, Golden Age, Belfort (Lt), Prenix (t), Prentos Theme (B), Ceriani-Frolkin Theme (B), Unique Proof Game
Genre: Retro
Computer test: Jacobi v.0.7.5
FEN: 1nBq1r2/p1ppnpp1/4k3/8/8/8/PPPPP2P/RNBQK1Nr
Input: James Malcom, 2020-10-28
Last update: A.Buchanan, 2021-05-07 more...
5 - P1381700
A. H. Bobbins
154 American Chess Magazine Vol. 1, p. 443, 12/1897
P1381700
(6+3)
=2 durch Schwarz

Black forces a draw in two moves
1. ... c1=wL!
2. Sb1 axb1=wL! Patt
2. Db1+ axb1=B! Patt
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James Malcom: I've added in the solution now. (2020-11-11)
comment
Keywords: Joke, Joke promotion, under-promotion key, konsekutive Umwandlungen 2 (LL, Lb), Dummy Pawn, Golden Age
Genre: Fairies
FEN: 8/P7/8/5B2/8/K1NQ4/pPp5/k7
Input: James Malcom, 2020-11-10
Last update: James Malcom, 2021-06-18 more...
6 - P1384934
James Malcom
PDB Website 04/01/2020
P1384934
(5+8) C+
h#2
1. b1=B! Lxa3 2. c1=B! Dxc3#
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more ...
comment
Keywords: Joke (Not!), Dummy Pawn, Golden Age, konsekutive Umwandlungen 2 (bb)
Genre: h#
Computer test: Popeye 4.79
FEN: 8/8/8/8/p2Q4/r1pKP3/ppp1P3/k1Bb4
Input: James Malcom, 2021-01-04
Last update: James Malcom, 2021-06-18 more...
7 - P1387362
Manfred Zucker
Freie Presse (Chemnitz) 24/06/1977
P1387362
(1+1)
Wie viele verschiedene letzte Züge sind möglich?
29 Lösungen
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Gefragt war natürlich nach dem letzten Einzelzug. Nun kann zuletzt sowohl der weiße als auch der der schwarze König gezogen haben. Der weiße König kann von drei verschiedenen Feldern (a2,b1,b2) gekommen sein, und er kann auf a1 eine schwarze Dame, einen schwarzen Turm, einen schwarzen Läufer, einen schwarzen Springer oder nichts geschlagen haben, das sind 3x5=15 Möglichkeiten. Dasselbe trifft auf den schwarzen König zu, insgesamt ergeben sich so 30 Möglichkeiten für den letzten Zug - und doch ist diese Lösung nicht richtig! Die Stellung wKb2-sLa1 ist partiemöglich (letzte Züge: 1. ... a2-a2=L+! 2. Kxa1), die Stellung sKg2-wLh1 jedoch nicht, denn der weiße Läufer kann (bei schwarzer Königsstellung auf g2) auf keine Weise nach h1 gekommen sein! Diese partieunmögliche Stellung war also zu subtrahieren, das richtige Ergebnis mußte "29" lauten.

Duplicate Diagram: P1207607

Dazu schreibt die FP: "Wie viele verschiedene letzte Züge sind möglich? Noch ein kleiner Hinweis: Beachten Sie beim Zählen bitte auch, daß die Könige zuletzt geschlagen haben können.".

(MZ433)
.
Henrik Juel: solution
2x3x5 - 1 = 29
R: Kg2xLh1 is illegal (2021-03-12)
A.Buchanan: This preceded the DP rule by 20 years, so under “Golden Age” principle, that rule does not apply, although it would be sound either way. Under DP rule there would have been 2x2x3=12 possible last moves, as a rook or queen must have just been captured (2021-03-13)
A.Buchanan: Is an only kings position an aristocrat or a kindergarten? :) Is it a one liner? :) I think the answer should be no, no and no (2021-03-13)
comment
Keywords: Aristocrat, Miniature, only Kings, Golden Age, Last Move?, Symmetrical position, Asymmetrical solution
Genre: Retro, Mathematics
FEN: 8/8/8/8/8/8/8/K6k
Input: Felber, Volker, 2021-03-12
Last update: A.Buchanan, 2021-03-13 more...
8 - P1393307
James Malcom
1627 Julias Fairies 22/06/2021
P1393307
(13+14) C+
BP in 18.0 (-:
Dummy Pawn Promotion
1. a4 f5 2. Ta3 f4 3. Th3 f3 4. g3 fxe2 5. Lg2 exd1=B 6. Lc6 dxc6 7. Ke2 Lg4+ 8. Ke3 e6 9. Se2 Lb4 10. Txd1 Lc3 11. dxc3 Sf6 12. Td5 Tf8 13. Ta5 Tf7 14. Ta6 Td7 15. a5 Td1 16. Ld2 Tg1 17. Le1 Tg2 18. Sd2 Dd3+
play all play one stop play next play all
Henrik Juel: What is the (-: trick, James? (2021-08-30)
James Malcom: Nothing special; merely the usual. (2021-08-30)
Henrik Juel: Ah, the old dummy pawn...
Why not spell it out in the stipulation? Not everybody knows 'the usual', and I had forgotten all about it (2021-08-30)
James Malcom: Done! (2021-08-31)
comment
Keywords: Dummy Pawn, Move Length Record, Schnoebelen Theme, Golden Age, Joke (Not!), Prentos Theme (B), Ceriani Chain (B), Unique Proof Game
Genre: Retro
Computer test: Jacobi v0.7.5 in 24 hours by Michael Caullaud
FEN: rn2k3/ppp3pp/R1p1pn2/P7/6b1/2PqK1PR/1PPNNPrP/4B3
Input: James Malcom, 2021-08-30
Last update: James Malcom, 2021-08-31 more...
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The problems of this query have been registered by the following contributors:

Gerd Wilts (1)
James Malcom (5)
Mario Richter (1)
Felber, Volker (1)