25 problem(s) found in 4721 milliseconds (displaying 25 problem(s)). [COMMENTDATE>=20220810 AND G='Retro' AND NOT A='Nouguier, Henri' AND K='Minimal'] [download as LaTeX]
R: 1. b2xBc3 b4xc3ep, dann bxa6 b3=
Cook: R: 1. b2xDc3 Da3xSc3, dann 1. bxa6 bxa3=
Cook: R: 1. b2xDc3 Da3xSc3, dann 1. bxa6 bxa3=
Keywords: En passant in the retro play, Help retractor, Kindergarten Problem, Minimal, Miniature, Ideal stalemate, Superseded by (P1360139)
Genre: Retro, Fairies
Computer test: cooked by Deadpos v2.3 14-Jan-2024
FEN: 8/1pK5/P7/k7/8/2P5/8/8
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2024-01-18 more...
Genre: Retro, Fairies
Computer test: cooked by Deadpos v2.3 14-Jan-2024
FEN: 8/1pK5/P7/k7/8/2P5/8/8
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2024-01-18 more...
R: 1. Kg8xDh8
Solved in YouTubex httx//www. youtube. com/watch?v=Do_rkLQnrpk
Solved in YouTubex httx//www. youtube. com/watch?v=Do_rkLQnrpk
Compare P0000490 with equivalent material but 30 years later.
A.Buchanan: Solved in YouTube: https://www.youtube.com/watch?v=Do_rkLQnrpk (2022-02-17)
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A.Buchanan: Solved in YouTube: https://www.youtube.com/watch?v=Do_rkLQnrpk (2022-02-17)
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Keywords: Type A, Last Move? (KxD), Economy record (Last Move? Type A), Type B (a fortiori), Economy record (Last Move? Type B), Minimal
Genre: Retro
Computer test: Solved in YouTube: https://www.youtube.com/watch?v=Do_rkLQnrpk
FEN: 3bkN1K/pppprp1p/4p1p1/8/8/8/8/8
Reprints: 1372 FEENSCHACH 08-09/1952
Problem 10-12 12/1952
1.2A Eigenartige Schachprobleme , p. 172, 2010
1.2B Eigenartige Schachprobleme , p. 172, 2010
YouTube 13/02/2022
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-06-01 more...
Genre: Retro
Computer test: Solved in YouTube: https://www.youtube.com/watch?v=Do_rkLQnrpk
FEN: 3bkN1K/pppprp1p/4p1p1/8/8/8/8/8
Reprints: 1372 FEENSCHACH 08-09/1952
Problem 10-12 12/1952
1.2A Eigenartige Schachprobleme , p. 172, 2010
1.2B Eigenartige Schachprobleme , p. 172, 2010
YouTube 13/02/2022
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-06-01 more...
1. Da1! droht (unparierbar) 2. Dh8#
1. ... 0-0-0? ist illegal, da sK oder sTa8 schon gezogen haben muss
1. ... 0-0-0? ist illegal, da sK oder sTa8 schon gezogen haben muss
Keywords: Cant Castler, Castling (sg), Minimal, Miniature, Homebase
Genre: Retro, 2#
Computer test: C+ Popeye 4.61
FEN: r3k3/p1p5/Q3K3/8/8/8/8/8
Reprints: 304 Chess Strategy (Loyd) 1878
73 150 Schachkuriositäten 1910
63 Sam Loyd and his Chess Problems 1913
43 64 Schach-Scherze 1915
32 Retrograde Analysis 1915
168 Allgemeine Zeitung Chemnitz 27/11/1927
Arbeiter-Zeitung (Wien) 27/11/1932
8 Comoedia 09/07/1933
(II) Problem 37-40 09/1956
(D10) feenschach 27 04/1975
84 100 Classics of the Chessboard 1983
(7a) Die Schwalbe 145 08/1995
Thema Danicum 95 1999
52 Opfer-Opfer-Matt Gaudium 21 10/2000
Outrageous Chess Problems 2005
Input: Gerd Wilts, 1995-06-03
Last update: Mario Richter, 2023-05-26 more...
Genre: Retro, 2#
Computer test: C+ Popeye 4.61
FEN: r3k3/p1p5/Q3K3/8/8/8/8/8
Reprints: 304 Chess Strategy (Loyd) 1878
73 150 Schachkuriositäten 1910
63 Sam Loyd and his Chess Problems 1913
43 64 Schach-Scherze 1915
32 Retrograde Analysis 1915
168 Allgemeine Zeitung Chemnitz 27/11/1927
Arbeiter-Zeitung (Wien) 27/11/1932
8 Comoedia 09/07/1933
(II) Problem 37-40 09/1956
(D10) feenschach 27 04/1975
84 100 Classics of the Chessboard 1983
(7a) Die Schwalbe 145 08/1995
Thema Danicum 95 1999
52 Opfer-Opfer-Matt Gaudium 21 10/2000
Outrageous Chess Problems 2005
Input: Gerd Wilts, 1995-06-03
Last update: Mario Richter, 2023-05-26 more...
1. Kb3 Kd2 2. Ka4 Kc3 3. a2 Txa2#
Nicht 1. Kb3 0-0-0?? 2. Ka2 Td3 3. Ka1 Txa3#, da Weiß zuletzt mit K oder T gezogen hat
Nicht 1. Kb3 0-0-0?? 2. Ka2 Td3 3. Ka1 Txa3#, da Weiß zuletzt mit K oder T gezogen hat
1. ... Sf5? 2. 0-0-0?? Sd6# - aber die s0-0-0 ist illegal, den zuletzt muß Schwarz mit K oder T gezogen haben.
1. ... Sg8! 2. Td8 Sc7#
1. ... Sg8! 2. Td8 Sc7#
Mario Richter: Luboš Kekely (Slovakia) correctly points out that 1. ... Sf5! 2. 0-0-0 Sd6# is only a try and not a solution (last black move must have been by King or Rook, so the queenside castling is illegal).
I have changed the solution accordingly. (2023-03-10)
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I have changed the solution accordingly. (2023-03-10)
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1. ... h6 2. La4 Kxa2 3. Tf3 Ka1 4. Ta3#
retro try: 1. Lg8?? h6 2. Tf7 Kxa2 3. Ta7#
retro try: 1. Lg8?? h6 2. Tf7 Kxa2 3. Ta7#
Keywords: No legal last move for Black, Minimal
Genre: Retro, 3#
Computer test: C+ Popeye 4.61
FEN: 8/7p/8/7P/8/1B6/P1P2R2/k1K5
Reprints: RA14 diagrammes 15 06/1975
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2022-11-27 more...
Genre: Retro, 3#
Computer test: C+ Popeye 4.61
FEN: 8/7p/8/7P/8/1B6/P1P2R2/k1K5
Reprints: RA14 diagrammes 15 06/1975
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2022-11-27 more...
R: 1. Ke2xLf1 ~ 2. Kd3xLe2 ~ 3. Kc4xLd3 ~ 4. Kb5xLc4 ~ 5. Kb6-b5! ~ 6. Sa6xSb8, dann 1. Sc7#
S N Ravi Shankar: This problem is not mine. (2019-01-02)
Mario Richter: My first guess for the solution was:
R: 1. Ke2xLf1 2. Kd3xLe2 3. Kc4xLd3 4. Kb5xLc4 5. Ka6xLb5 Lc6-b5+ 6. Sd7xLb8, dann 1. Sb6#, but that doesn't work because of 5. ... Ld7-b5+!
Does someone see (or know) the correct solution? (2019-01-03)
Henrik Juel: No, because with 1... Lh3-f1+, 5.Ka6-b5 thr. 6.Sd7xLb8 fails similarly on 5... Ld7-h3 (2019-01-03)
S N Ravi Shankar: Does adding a black knight on e6 cure? 1. Ke2xLf1 2. Kd3xLe2 3. Kc4xLd3 4. Kb5xLc4 5. Ka6-b5! followed by 6. Sd7xLb8 and now 1. Sb6#. (2023-02-20)
S N Ravi Shankar: The problem appears to be sound. 1.Ke2xLf1 2.Kd3xLe2 3.Kc4xLd3 4.Kb5xLc4 5.Kb6-b5! followed by 6.Sa6xSb8 and now 1.Sc7#. (2024-02-18)
A.Buchanan: WinChloe also gives the same composer. A curious situation, but at least the problem attributed to you appears to be sound! (2024-02-19)
Adrian Storisteanu: Above the "diagrammes" diagram there is: R. SHANKAR, Inde. In the volume index, under RETROS: this is the only problem of a composer named (just) "SHANKAR" (one original), while "RAVI SHANKAR" is a different author (with two originals). (2024-02-20)
A.Buchanan: I suggest that S.N.Ravishankar check the reaponse to the query (A='Shankar' or a='Ravishankar') AND NOT A='Shankar Ram, Narajan' as there are many other similar retros which are attributed to Ravishankar. If he can state here which ones are not his, I will happily modify the data. (2024-02-21)
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Mario Richter: My first guess for the solution was:
R: 1. Ke2xLf1 2. Kd3xLe2 3. Kc4xLd3 4. Kb5xLc4 5. Ka6xLb5 Lc6-b5+ 6. Sd7xLb8, dann 1. Sb6#, but that doesn't work because of 5. ... Ld7-b5+!
Does someone see (or know) the correct solution? (2019-01-03)
Henrik Juel: No, because with 1... Lh3-f1+, 5.Ka6-b5 thr. 6.Sd7xLb8 fails similarly on 5... Ld7-h3 (2019-01-03)
S N Ravi Shankar: Does adding a black knight on e6 cure? 1. Ke2xLf1 2. Kd3xLe2 3. Kc4xLd3 4. Kb5xLc4 5. Ka6-b5! followed by 6. Sd7xLb8 and now 1. Sb6#. (2023-02-20)
S N Ravi Shankar: The problem appears to be sound. 1.Ke2xLf1 2.Kd3xLe2 3.Kc4xLd3 4.Kb5xLc4 5.Kb6-b5! followed by 6.Sa6xSb8 and now 1.Sc7#. (2024-02-18)
A.Buchanan: WinChloe also gives the same composer. A curious situation, but at least the problem attributed to you appears to be sound! (2024-02-19)
Adrian Storisteanu: Above the "diagrammes" diagram there is: R. SHANKAR, Inde. In the volume index, under RETROS: this is the only problem of a composer named (just) "SHANKAR" (one original), while "RAVI SHANKAR" is a different author (with two originals). (2024-02-20)
A.Buchanan: I suggest that S.N.Ravishankar check the reaponse to the query (A='Shankar' or a='Ravishankar') AND NOT A='Shankar Ram, Narajan' as there are many other similar retros which are attributed to Ravishankar. If he can state here which ones are not his, I will happily modify the data. (2024-02-21)
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Keywords: Defensive Retractor, Type Proca, Rex solus (s), Aristocrat, Minimal, Miniature
Genre: Retro
FEN: kN6/8/8/8/8/8/8/5K2
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2024-02-21 more...
Genre: Retro
FEN: kN6/8/8/8/8/8/8/5K2
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2024-02-21 more...
R: 1. Ka3-a4?, dann 1. Lxa2=
R: 1. Ka3xBa4!, dann 1. Lxa2=
Mit folgender witziger Begründung des Autors: "If on the board are only KL-KL (and LL on squares of the same colour), by the rules of chess an immediate draw occurs! Therefore, the retro move Ka3-a4 is illegal." Ein Fehllöser: "Reichlich trivial." Ein Ratloser: "... oder wie darf ich das sehen?" TK hatte den Durchblick: "Die doppelte Rücknahmemöglichkeit kann man aber gar nicht übersehen (und schon gar nicht der Autor). Einzige Möglichkeit: nur Ka3xBa4, weil andernfalls die Stellung schon vorher patt wäre. Aber, aber: das ist remis, kein Patt!!" FR: "Meine 'Ehrenlösung' für diese Gruppe (hoffentlich stimmt sie auch)." WM: "Nette Pointe. Das erzähl' ich meinen Kindern, daß ich einen PLAKSIN gelöst habe." 1,2/I
R: 1. Ka3xBa4!, dann 1. Lxa2=
Mit folgender witziger Begründung des Autors: "If on the board are only KL-KL (and LL on squares of the same colour), by the rules of chess an immediate draw occurs! Therefore, the retro move Ka3-a4 is illegal." Ein Fehllöser: "Reichlich trivial." Ein Ratloser: "... oder wie darf ich das sehen?" TK hatte den Durchblick: "Die doppelte Rücknahmemöglichkeit kann man aber gar nicht übersehen (und schon gar nicht der Autor). Einzige Möglichkeit: nur Ka3xBa4, weil andernfalls die Stellung schon vorher patt wäre. Aber, aber: das ist remis, kein Patt!!" FR: "Meine 'Ehrenlösung' für diese Gruppe (hoffentlich stimmt sie auch)." WM: "Nette Pointe. Das erzähl' ich meinen Kindern, daß ich einen PLAKSIN gelöst habe." 1,2/I
A harbinger of Dead Reckoning-style reasoning, before that rule ever existed. As sound today in 2018, as when it was composed under "insufficient material for mate" rule.
Henrik Juel: Nice to see that I am not the only freak who mixes english text with german notation (to avoid the ambiguous B)
Were you inspired by this problem in your work on Dead Reckoning, Andrew? (2020-05-04)
A.Buchanan: Ha no: when I stumbled across DP rule I knew even less about chess problems than I know now, if you can imagine, and had never encountered this one which Werner Keym unearthed and published it in "Out Of the Box". Ecclesiastes 1:9 says "There is nothing new under the sun." Mario made this point about origin of Schnoebelen promotions too. Gollon's intepretation of Chaturanga (the earliest known forebear of chess) offers fascinating possibilities for Schnoebelen promotion, which I am sure the Indian retrograde analysts of 7th Century CE were adept at exploiting, in tablets alas now lost. See https://www.chessvariants.com/historic.dir/chaturanga.html.
The "insufficient material" composition does perhaps explain Plaksin's openness to the concept of DP, at a time when perhaps some noses elsewhere were being turned up, as he later composed with Kornilov *27* other DP problems, all to be found in PDB. (2020-05-04)
Ladislav Packa: Interesting, but on YouTube I saw a game (one of the actors was Magnus Carlsson), which ended in a position with only two kings and one of the players still made a move. (2020-05-05)
A.Buchanan: http://wismuth.com/chess/illegal-moves.html contains many other games where GMs were unable to tear themselves away from playing the dead game. I think it's kind of sweet that the GMs just can't stop playing. Have you got a link to the Carlsen game please, Ladislav? (2020-05-06)
Ladislav Packa: I'm sorry, Andrew, but I don't remember. I've seen hundreds of games on youtube. But I encountered similar cases in my own practice, mostly a joke, and the game immediately ended with a smile and a handshake. (2020-05-06)
A.Buchanan: A completely different stipulation: -w, h=1 half-duplex (2024-01-11)
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Henrik Juel: Nice to see that I am not the only freak who mixes english text with german notation (to avoid the ambiguous B)
Were you inspired by this problem in your work on Dead Reckoning, Andrew? (2020-05-04)
A.Buchanan: Ha no: when I stumbled across DP rule I knew even less about chess problems than I know now, if you can imagine, and had never encountered this one which Werner Keym unearthed and published it in "Out Of the Box". Ecclesiastes 1:9 says "There is nothing new under the sun." Mario made this point about origin of Schnoebelen promotions too. Gollon's intepretation of Chaturanga (the earliest known forebear of chess) offers fascinating possibilities for Schnoebelen promotion, which I am sure the Indian retrograde analysts of 7th Century CE were adept at exploiting, in tablets alas now lost. See https://www.chessvariants.com/historic.dir/chaturanga.html.
The "insufficient material" composition does perhaps explain Plaksin's openness to the concept of DP, at a time when perhaps some noses elsewhere were being turned up, as he later composed with Kornilov *27* other DP problems, all to be found in PDB. (2020-05-04)
Ladislav Packa: Interesting, but on YouTube I saw a game (one of the actors was Magnus Carlsson), which ended in a position with only two kings and one of the players still made a move. (2020-05-05)
A.Buchanan: http://wismuth.com/chess/illegal-moves.html contains many other games where GMs were unable to tear themselves away from playing the dead game. I think it's kind of sweet that the GMs just can't stop playing. Have you got a link to the Carlsen game please, Ladislav? (2020-05-06)
Ladislav Packa: I'm sorry, Andrew, but I don't remember. I've seen hundreds of games on youtube. But I encountered similar cases in my own practice, mostly a joke, and the game immediately ended with a smile and a handshake. (2020-05-06)
A.Buchanan: A completely different stipulation: -w, h=1 half-duplex (2024-01-11)
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Keywords: Help retractor, Dead Position, Aristocrat, Miniature, Minimal
Genre: Retro, Fairies
Computer test: C+ deadpos v2.1 8-Jan-2024
FEN: 8/8/8/8/K7/8/b7/kB6
Reprints: 440 Out Of the Box , p. 141, 2018
www.thbrand.de 14/01/2018
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2024-01-18 more...
Genre: Retro, Fairies
Computer test: C+ deadpos v2.1 8-Jan-2024
FEN: 8/8/8/8/K7/8/b7/kB6
Reprints: 440 Out Of the Box , p. 141, 2018
www.thbrand.de 14/01/2018
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2024-01-18 more...
9 - P0007185
Jesse George Ingram
10231 The Fairy Chess Review 06/1955
(2+2)
-1w, dann h=1 half-duplex
Jesse George Ingram
10231 The Fairy Chess Review 06/1955
(2+2)
-1w, dann h=1 half-duplex
R: 1. a5xDb6, dann 1. a6 Dd6=
Olaf Jenkner: Wieso wird Weiß pattgesetzt? (2010-03-02)
Mario Richter: Weil der Komponist das so wollte :-)
In fs33 ist die Forderung wie folgt wiedergegeben: "Wei� nimmt einen Zug zurück und hilft, da� Schwarz sofort pattsetzen kann." (2010-03-03)
Olaf Jenkner: Ach so, h=1 bedeutet eigentlich, daß Schwarz beginnt. (2010-03-03)
Henrik Juel: Yes, it is a bit confusing; but for retros it is an old tradition that you should not interpret one move stipulations too rigorously. (2010-03-05)
Mario Richter: But at least retro play and forward play harmonize: the side that retracted last starts the forward play. (2010-03-05)
Adrian Storisteanu: Can easily make it conform to today's accepted standards (i.e., drop the half-duplex indication):
Ka1 pa2 / Kc1 pb3 (2+2)
-1b & h=1
- 1.a4xQb3 & 1.a4-a3 Qb3-d3= (2024-01-13)
Olaf Jenkner: Das wären dann viele Mütter. (2024-01-14)
A.Buchanan: @Olaf :-) (2024-01-15)
Adrian Storisteanu: :-) Just in reverse Polish notation...
(Didn't know the many fathers thing started that long ago. I totally missed both the obvious setting and the recorded keyword.) (2024-01-15)
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Mario Richter: Weil der Komponist das so wollte :-)
In fs33 ist die Forderung wie folgt wiedergegeben: "Wei� nimmt einen Zug zurück und hilft, da� Schwarz sofort pattsetzen kann." (2010-03-03)
Olaf Jenkner: Ach so, h=1 bedeutet eigentlich, daß Schwarz beginnt. (2010-03-03)
Henrik Juel: Yes, it is a bit confusing; but for retros it is an old tradition that you should not interpret one move stipulations too rigorously. (2010-03-05)
Mario Richter: But at least retro play and forward play harmonize: the side that retracted last starts the forward play. (2010-03-05)
Adrian Storisteanu: Can easily make it conform to today's accepted standards (i.e., drop the half-duplex indication):
Ka1 pa2 / Kc1 pb3 (2+2)
-1b & h=1
- 1.a4xQb3 & 1.a4-a3 Qb3-d3= (2024-01-13)
Olaf Jenkner: Das wären dann viele Mütter. (2024-01-14)
A.Buchanan: @Olaf :-) (2024-01-15)
Adrian Storisteanu: :-) Just in reverse Polish notation...
(Didn't know the many fathers thing started that long ago. I totally missed both the obvious setting and the recorded keyword.) (2024-01-15)
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Keywords: Help retractor, Vielväterstellung, Kindergarten Problem, Minimal, Miniature
Genre: Retro, Fairies
FEN: k1K5/p7/1P6/8/8/8/8/8
Reprints: (5) feenschach 33 04-05/1976
Input: Gerd Wilts, 1996-08-15
Last update: A.Buchanan, 2024-01-18 more...
Genre: Retro, Fairies
FEN: k1K5/p7/1P6/8/8/8/8/8
Reprints: (5) feenschach 33 04-05/1976
Input: Gerd Wilts, 1996-08-15
Last update: A.Buchanan, 2024-01-18 more...
1) 1. ... g4 2. e6 g5 3. Ke7 g6 4. Td8 gxf7 5. Td7 f8=D#
2) 1. ... g3 2. Kd7 g4 3. Td8 g5 4. Ke8 g6 5. Sd7 gxf7#
Numerous retro tries but none distinct
2) 1. ... g3 2. Kd7 g4 3. Td8 g5 4. Ke8 g6 5. Sd7 gxf7#
Numerous retro tries but none distinct
Keywords: Promotion in the mating move, Excelsior white (auto key), No legal last move for White, Minimal
Genre: h#, Retro
Computer test: Popeye C-Version 3.52 (2048 KB)
FEN: 4k2r/4ppK1/5n1p/8/8/8/6P1/8
Reprints: 365 Minimalkunst im Schach 2006
Input: Gerd Wilts, 1996-06-06
Last update: A.Buchanan, 2023-12-08 more...
Genre: h#, Retro
Computer test: Popeye C-Version 3.52 (2048 KB)
FEN: 4k2r/4ppK1/5n1p/8/8/8/6P1/8
Reprints: 365 Minimalkunst im Schach 2006
Input: Gerd Wilts, 1996-06-06
Last update: A.Buchanan, 2023-12-08 more...
11 - P1068215
Zdravko Maslar
4936 feenschach 12/1986
2. Preis WJP
(1+2)
-1s, dann h=1
b) Kc1 nach b2
c) Kc1 nach a3
d) Kc1 nach a4
Zdravko Maslar
4936 feenschach 12/1986
2. Preis WJP
(1+2)
-1s, dann h=1
b) Kc1 nach b2
c) Kc1 nach a3
d) Kc1 nach a4
a) R: 1. Kb2xDc1, dann 1. Kb3 Da1=
b) R: 1. Ka1xTb2, dann 1. b3 Kc3=
c) R: 1. a5xSb4, dann 1. a4 Kc3=
d) R: 1. c5xLb4, dann 1. c4+ Kxc4=
b) R: 1. Ka1xTb2, dann 1. b3 Kc3=
c) R: 1. a5xSb4, dann 1. a4 Kc3=
d) R: 1. c5xLb4, dann 1. c4+ Kxc4=
Henrik Juel: a real gem (2023-05-20)
Adrian Storisteanu: Not an Allentschlag, there is no pawn uncapture. (2023-05-21)
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Adrian Storisteanu: Not an Allentschlag, there is no pawn uncapture. (2023-05-21)
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Keywords: Help retractor, RIFACE Retro Solving Tourney (2022), Kindergarten Problem, Minimal, Miniature, Kindergarten Problem, Miniature, Kindergarten Problem, Kindergarten Problem
Genre: Retro, Fairies
FEN: 8/8/8/8/1p6/3K4/8/2k5
Reprints: feenschach 158 01-03/2005
3 Phénix 331, p. 12922, 06/2022
Input: Gerd Wilts, 2006-01-21
Last update: A.Buchanan, 2024-01-18 more...
Genre: Retro, Fairies
FEN: 8/8/8/8/1p6/3K4/8/2k5
Reprints: feenschach 158 01-03/2005
3 Phénix 331, p. 12922, 06/2022
Input: Gerd Wilts, 2006-01-21
Last update: A.Buchanan, 2024-01-18 more...
a) 1. Dxb7 droht 2. Dxa8#
1. ... Da6 2. Dxa8+ Dc8 3. Dxc8#
2. Dh1 (droht 3. Dh8#) 0-0-0 3. Da8#
1. ... Db1,b2 2. Dxa8+ Db8 3. Dxb8#
1. ... c5,c6 2. Dxa8+ Lb8 3. Dxb8#
1. ... Td8 2. Dh1 droht 3. Dh8#
b) 1. Dh1 Lh5 2. Dxh5+ Kd8 3. Dh8#
In (b) Rochade nicht mehr möglich, da sLd1 durch Umwandlung entstanden (und sDa1 somit die schwarze Original-Dame ist)
1. ... Da6 2. Dxa8+ Dc8 3. Dxc8#
2. Dh1 (droht 3. Dh8#) 0-0-0 3. Da8#
1. ... Db1,b2 2. Dxa8+ Db8 3. Dxb8#
1. ... c5,c6 2. Dxa8+ Lb8 3. Dxb8#
1. ... Td8 2. Dh1 droht 3. Dh8#
b) 1. Dh1 Lh5 2. Dxh5+ Kd8 3. Dh8#
In (b) Rochade nicht mehr möglich, da sLd1 durch Umwandlung entstanden (und sDa1 somit die schwarze Original-Dame ist)
1... b6
Cook: 1. ... b5 2. Ta1/Ta1/Ta6/Ta5/Kd7/Kd8
1. ... b6 2. b4/Kd7/Kd8
Cook: 1. ... b5 2. Ta1/Ta1/Ta6/Ta5/Kd7/Kd8
1. ... b6 2. b4/Kd7/Kd8
A18d RA3
Henrik Juel: duals, e.g., 0... b5 1.Kd8,Kd7,Ta1 (2022-12-05)
A.Buchanan: If WTM, no solution, but since no legal last move for Black, we let Black start:
1...b5
2.Ra1/Ra2/Ra6 b4
3.Kd7/Kd8 Kb7 4.a8=Q#
2.Ra5 b4
3.Rc5 Kxa7 4.Ra5#
3.Kd7/Kd8 Kb7 4.a8=Q#
2.Kd7/Kd8 b4
3.Ra1/Ra2/Ra6/Ra5/Ra4 Kb7 4.a8=Q#
1...b6
2.b4 b5
3.Re3 Kxa7 4.Ra3#
3.Kd7/Kd8 Kb7 4.a8=Q#
2.Kd7/Kd8 b5 3.b4 Kb7 4.a8=Q#
The play is so savagely dualized, that one must marked it as cooked. Typo? (2023-12-04)
comment
Henrik Juel: duals, e.g., 0... b5 1.Kd8,Kd7,Ta1 (2022-12-05)
A.Buchanan: If WTM, no solution, but since no legal last move for Black, we let Black start:
1...b5
2.Ra1/Ra2/Ra6 b4
3.Kd7/Kd8 Kb7 4.a8=Q#
2.Ra5 b4
3.Rc5 Kxa7 4.Ra5#
3.Kd7/Kd8 Kb7 4.a8=Q#
2.Kd7/Kd8 b4
3.Ra1/Ra2/Ra6/Ra5/Ra4 Kb7 4.a8=Q#
1...b6
2.b4 b5
3.Re3 Kxa7 4.Ra3#
3.Kd7/Kd8 Kb7 4.a8=Q#
2.Kd7/Kd8 b5 3.b4 Kb7 4.a8=Q#
The play is so savagely dualized, that one must marked it as cooked. Typo? (2023-12-04)
comment
Keywords: Miniature Collection (0334424), No legal last move for Black, Minimal, Miniature
Genre: 3#, Retro
Computer test: HC- Popeye v4.87 & trivial retro argument
FEN: k1K5/Pp6/8/8/8/RP6/5B2/8
Input: Zuncke/Bruder, 2010-09-11
Last update: A.Buchanan, 2023-12-04 more...
Genre: 3#, Retro
Computer test: HC- Popeye v4.87 & trivial retro argument
FEN: k1K5/Pp6/8/8/8/RP6/5B2/8
Input: Zuncke/Bruder, 2010-09-11
Last update: A.Buchanan, 2023-12-04 more...
1. ... fxg6! 2. Se2 g5 3. Kg3 g4 4. h3 gxh3 5. Kf2 Kh2 6. Sd4 Kh1 7. Sf5 Kh2 8. Se3 Kh1 9. Sf1 h2 10. Sg3#
1. Tf6? Kxg1 2. Txf7 Kh1 3. Tf1# but BTM
1. Tf6? Kxg1 2. Txf7 Kh1 3. Tf1# but BTM
Keywords: Miniature Collection (0344079), No legal last move for Black, Minimal, Miniature
Genre: n#, Retro
FEN: 8/5p2/6R1/8/8/7K/7P/6Nk
Input: Zuncke/Bruder, 2010-09-12
Last update: A.Buchanan, 2023-12-05 more...
Genre: n#, Retro
FEN: 8/5p2/6R1/8/8/7K/7P/6Nk
Input: Zuncke/Bruder, 2010-09-12
Last update: A.Buchanan, 2023-12-05 more...
15 - P1268181
Nico Georgiadis
Beat Züger
14755 Schweizerische Schachzeitung , p. 21, 10/2009
(2+10) C+
#2
Nico Georgiadis
Beat Züger
14755 Schweizerische Schachzeitung , p. 21, 10/2009
(2+10) C+
#2
Retro: Schwarz kann nicht mehr rochieren.
1. Th3 ... 2. Th8#
1. Th3 ... 2. Th8#
Henrik Juel: .. because last move was done with Ta8 or Ke8 (2023-08-01)
Henrik Juel: C+ Popeye 4.61 and simple analysis (2023-08-01)
comment
Henrik Juel: C+ Popeye 4.61 and simple analysis (2023-08-01)
comment
16 - P1285627
Ravi Shankar
15744 Die Schwalbe 263 10/2013
(2+5) cooked
r#1 vor 13 Zügen
VRZ friedlich
Ravi Shankar
15744 Die Schwalbe 263 10/2013
(2+5) cooked
r#1 vor 13 Zügen
VRZ friedlich
R: 1. Kf4-g4 Tg7-f7 2. Kf3-f4 h2-h1=L 3. Kg2-f3 Tf7-g7 4. Kg1-g2 h3-h2
5. Kg2-g1 h4-h3 6. Kf3-g2 Tg7-f7 7. Kg4-f3 Tf7-g7 8. Kf4-g4 Tg7-f7
9. Ke5-f4 Th6-h5 10. Kd6-e5 Th5-h6 11. Kc5-d6 Th6-h5 12. Kb6-c5 Th5-h6
13. Ka6-b6, dann 1. Ta7 Th6#
Cook: Mehrere Kurzlösungen, z.B.
R: 1.Kf4-g4 Tg7-f7+ 2.Kg3-f4 Tf7-g7+ 3.Kg2-g3 h2-h1=L+ 4.Kf3-g2 Tg7-f7+ 5.Kg3-f3 Tf7-g7 6. Te1-e7, dann 1. Te1-g1 h2xg1=D/T#
5. Kg2-g1 h4-h3 6. Kf3-g2 Tg7-f7 7. Kg4-f3 Tf7-g7 8. Kf4-g4 Tg7-f7
9. Ke5-f4 Th6-h5 10. Kd6-e5 Th5-h6 11. Kc5-d6 Th6-h5 12. Kb6-c5 Th5-h6
13. Ka6-b6, dann 1. Ta7 Th6#
Cook: Mehrere Kurzlösungen, z.B.
R: 1.Kf4-g4 Tg7-f7+ 2.Kg3-f4 Tf7-g7+ 3.Kg2-g3 h2-h1=L+ 4.Kf3-g2 Tg7-f7+ 5.Kg3-f3 Tf7-g7 6. Te1-e7, dann 1. Te1-g1 h2xg1=D/T#
Autordetails: Ravi Shankar S.N. (IND-Bangalore)
Henrik Juel: Problems in this retro genre are called pacific retractors, I believe, so as an English keyword 'Type pacific' is more natural than 'Type pacifistic' (2014-06-17)
Alfred Pfeiffer: Autor "Ravi Shankar" (6 Probleme) = "S. N. Ravishankar" (43 Probleme)? (2018-01-17)
Henrik Juel: Probably yes, Alfred, but this is just my guess (2018-01-17)
Arnold Beine: Der Autor heißt "S. N. Ravi Shankar". Die Schreibweise S. N. Ravishankar" ist definitiv falsch, wie mir vom Autor selbst per Email bestätigt wurde. Bei "Ravi Shankar" handelt es sich ebenfalls um "S. N. Ravi Shankar". (2018-01-18)
Alfred Pfeiffer: Danke für die Auskunft. Damit kann es vereinheitlicht werden.
Ist "Ravi" ein Vorname oder ein Teil des Familiennamens? (2018-01-18)
Henrik Juel: Indian naming conventions are extremely confusing for us in the West, and I certainly do not understand them
The well-known chess player V. Anand is an example:
Our interpretation, that V. is an inital for his first name and Anand is his family name, is not correct at all
Rather, his name is just Anand, and if you need to distinguish between several men called Anand, you might use the 'initial' V., because the first letter in his fathers name is V (except of course that these are translitterations from Hindi or some other Indian language)
For this author I would suggest just Ravi Shankar (2018-01-18)
Arnold Beine: Wie Henrik schon erläutert hat, hat der Autor keinen Familiennamen. Er ist benannt nach zwei unterschiedlichen indischen Gottheiten. Im Zusatz "S N" oder "S. N." stehen das S und N für den Geburtsort des Vaters und den Namen des Vaters. Dieser Zusatz - vom Autor auch oft ohne Abkürzungspunkte geschrieben - taucht manchmal vor und manchmal nach dem Namen auf. Ich habe mich bei der Veröffentlichung seiner Aufgaben für "S. N." - mit Punkt und vor seinem Namen - entschieden, weil es mehr unseren Gepflogenheiten entspricht.
Vor einigen Jahrhunderten gab es in Deutschland auch noch keine Familiennamen, und würde heute ein Indianer namens "Schneller Hirsch" ein Problem veröffentlichen, könnte man ihm auch keinen Vor- und Familiennamen zuordnen. Ich könnte mir aber vorstellen, dass eine quasi-Zuordnung für die Suchfunktion Sinn machen würde. Aber das zu beurteilen überlasse ich anderen. (2018-01-19)
A.Buchanan: It seems these authors are not the same (2024-02-20)
comment
Henrik Juel: Problems in this retro genre are called pacific retractors, I believe, so as an English keyword 'Type pacific' is more natural than 'Type pacifistic' (2014-06-17)
Alfred Pfeiffer: Autor "Ravi Shankar" (6 Probleme) = "S. N. Ravishankar" (43 Probleme)? (2018-01-17)
Henrik Juel: Probably yes, Alfred, but this is just my guess (2018-01-17)
Arnold Beine: Der Autor heißt "S. N. Ravi Shankar". Die Schreibweise S. N. Ravishankar" ist definitiv falsch, wie mir vom Autor selbst per Email bestätigt wurde. Bei "Ravi Shankar" handelt es sich ebenfalls um "S. N. Ravi Shankar". (2018-01-18)
Alfred Pfeiffer: Danke für die Auskunft. Damit kann es vereinheitlicht werden.
Ist "Ravi" ein Vorname oder ein Teil des Familiennamens? (2018-01-18)
Henrik Juel: Indian naming conventions are extremely confusing for us in the West, and I certainly do not understand them
The well-known chess player V. Anand is an example:
Our interpretation, that V. is an inital for his first name and Anand is his family name, is not correct at all
Rather, his name is just Anand, and if you need to distinguish between several men called Anand, you might use the 'initial' V., because the first letter in his fathers name is V (except of course that these are translitterations from Hindi or some other Indian language)
For this author I would suggest just Ravi Shankar (2018-01-18)
Arnold Beine: Wie Henrik schon erläutert hat, hat der Autor keinen Familiennamen. Er ist benannt nach zwei unterschiedlichen indischen Gottheiten. Im Zusatz "S N" oder "S. N." stehen das S und N für den Geburtsort des Vaters und den Namen des Vaters. Dieser Zusatz - vom Autor auch oft ohne Abkürzungspunkte geschrieben - taucht manchmal vor und manchmal nach dem Namen auf. Ich habe mich bei der Veröffentlichung seiner Aufgaben für "S. N." - mit Punkt und vor seinem Namen - entschieden, weil es mehr unseren Gepflogenheiten entspricht.
Vor einigen Jahrhunderten gab es in Deutschland auch noch keine Familiennamen, und würde heute ein Indianer namens "Schneller Hirsch" ein Problem veröffentlichen, könnte man ihm auch keinen Vor- und Familiennamen zuordnen. Ich könnte mir aber vorstellen, dass eine quasi-Zuordnung für die Suchfunktion Sinn machen würde. Aber das zu beurteilen überlasse ich anderen. (2018-01-19)
A.Buchanan: It seems these authors are not the same (2024-02-20)
comment
Keywords: Defensive Retractor, Type Pacific, Minimal
Genre: Retro, Fairies
FEN: 8/4Rr1p/8/7r/k5K1/8/8/7b
Input: Mario Richter, 2014-06-17
Last update: Alfred Pfeiffer, 2018-01-17 more...
Genre: Retro, Fairies
FEN: 8/4Rr1p/8/7r/k5K1/8/8/7b
Input: Mario Richter, 2014-06-17
Last update: Alfred Pfeiffer, 2018-01-17 more...
R: 1. Kb8xSa8
Compare P0001033.
Gerald Ettl: steht der sLh5 vielleicht auf h2 ?? (2023-07-02)
SCHRECKE: Why not R: Kb8xLa8? (2023-07-03)
Mario Richter: Wie "SCHRECKE" mit seiner Frage schon illustriert hat: mit dem sL auf h2 wäre das Problem inkorrekt, da neben R: 1. Kb8xSa8 auch R: 1. Kb8xLa8 als letzter Zug möglich gewesen wäre. Grund sind die etwas verwirrenden Dead-Reckoning-Regeln: mit sLh5 kann zuletzt nicht Kb8xLa8 geschehen sein, da in der Stellung wKb8 - sKb6 sLh5 sLa8 wegen der unzureichendes-Material-zum-Mattsetzen-Regel das Spiel schon in dieser Position beendet gewesen wäre, der wK als gar nicht mehr zur Ausführung eines Zuges geommen wäre ... (2023-07-03)
Mario Richter: Dear James, I suggest that you undo last change and put the black bishop back on h5! (2023-07-03)
A.Buchanan: There are 17 valid squares for the wB. Got to be on a light square for reasons given. Also it can't occupy or attack c8. And can't be attacking a8 because BTM. I think h5 selection was random, but could argue for any. (2023-07-04)
A.Buchanan: Or maybe bBa4, with which White by his last move avoided a completely sound #12. (2023-07-04)
Gerald Ettl: Dann waere es vielleicht ganz sinnvoll man schreibt die Bedingung unter das Diagramm. (2023-07-04)
A.Buchanan: Hi Gerald, it's not a condition, it's a FIDE rule since 1997, invented by a problemist who is also a rules committee member (Igor Vereschchagin) and approved by the rules committee (headed by FIDE Head International Arbiter Stewart Reuben), backed up by a WFCC convention since 2015 (Kjell Widlert & Michel Caillaud, responding to a request from some endgame studiers who understood that it was a real thing. Like 50M rule, it applies by default for retro problems. And the PDB keywords here give the game away anyway. If it was a forward stipulation, then I would indeed add a stipulation, e.g. P1208623. Please enjoy the madness that is DP rule :) P.S. I have found recently that it was really invented by Shakespeare. (2023-07-04)
Gerald Ettl: Ich spiele nicht nach den FIDE-Regel. (2023-07-04)
Olaf Jenkner: Allright.
https://www.skat-online.com/regeln-hilfe/regelwerk/internationale-skatordnung.html (2023-07-05)
comment
Gerald Ettl: steht der sLh5 vielleicht auf h2 ?? (2023-07-02)
SCHRECKE: Why not R: Kb8xLa8? (2023-07-03)
Mario Richter: Wie "SCHRECKE" mit seiner Frage schon illustriert hat: mit dem sL auf h2 wäre das Problem inkorrekt, da neben R: 1. Kb8xSa8 auch R: 1. Kb8xLa8 als letzter Zug möglich gewesen wäre. Grund sind die etwas verwirrenden Dead-Reckoning-Regeln: mit sLh5 kann zuletzt nicht Kb8xLa8 geschehen sein, da in der Stellung wKb8 - sKb6 sLh5 sLa8 wegen der unzureichendes-Material-zum-Mattsetzen-Regel das Spiel schon in dieser Position beendet gewesen wäre, der wK als gar nicht mehr zur Ausführung eines Zuges geommen wäre ... (2023-07-03)
Mario Richter: Dear James, I suggest that you undo last change and put the black bishop back on h5! (2023-07-03)
A.Buchanan: There are 17 valid squares for the wB. Got to be on a light square for reasons given. Also it can't occupy or attack c8. And can't be attacking a8 because BTM. I think h5 selection was random, but could argue for any. (2023-07-04)
A.Buchanan: Or maybe bBa4, with which White by his last move avoided a completely sound #12. (2023-07-04)
Gerald Ettl: Dann waere es vielleicht ganz sinnvoll man schreibt die Bedingung unter das Diagramm. (2023-07-04)
A.Buchanan: Hi Gerald, it's not a condition, it's a FIDE rule since 1997, invented by a problemist who is also a rules committee member (Igor Vereschchagin) and approved by the rules committee (headed by FIDE Head International Arbiter Stewart Reuben), backed up by a WFCC convention since 2015 (Kjell Widlert & Michel Caillaud, responding to a request from some endgame studiers who understood that it was a real thing. Like 50M rule, it applies by default for retro problems. And the PDB keywords here give the game away anyway. If it was a forward stipulation, then I would indeed add a stipulation, e.g. P1208623. Please enjoy the madness that is DP rule :) P.S. I have found recently that it was really invented by Shakespeare. (2023-07-04)
Gerald Ettl: Ich spiele nicht nach den FIDE-Regel. (2023-07-04)
Olaf Jenkner: Allright.
https://www.skat-online.com/regeln-hilfe/regelwerk/internationale-skatordnung.html (2023-07-05)
comment
Keywords: Type B, Last Move? (KxS), Dead Position, Economy record (Last Move? Type B), Rex solus (W), Aristocrat, Miniature, Minimal
Genre: Retro
FEN: K7/8/1k6/7b/8/8/8/8
Reprints: Retros mailing list 20/02/2007
Input: A.Buchanan, 2015-01-07
Last update: James Malcom, 2023-07-03 more...
Genre: Retro
FEN: K7/8/1k6/7b/8/8/8/8
Reprints: Retros mailing list 20/02/2007
Input: A.Buchanan, 2015-01-07
Last update: James Malcom, 2023-07-03 more...
18 - P1301781
Stanislav Vokal
784 Seven Chess Notes 2008
Spezielle ehrende Erwähnung
(2+5) C+
#2
b) -Ta7
Stanislav Vokal
784 Seven Chess Notes 2008
Spezielle ehrende Erwähnung
(2+5) C+
#2
b) -Ta7
a) 1. ... 0-0-0?
1. Dh7! Kd8 2. Dd7#
b) 1. Dh7? 0-0-0!
1. Dxb7! droht 2. De7,Dxa8#
1. ... Kd8 2. Dd7#
1. ... Kf8 2. Df7#
1. Dh7! Kd8 2. Dd7#
b) 1. Dh7? 0-0-0!
1. Dxb7! droht 2. De7,Dxa8#
1. ... Kd8 2. Dd7#
1. ... Kf8 2. Df7#
1. ... ??
1. Df6! droht 2. De7#,Dxh8#
1. ... Kf8 2. Dxh8#
1. ... Tg8,Tf8 2. De7#
1. ... 0-0?? illegal
1. Df6! droht 2. De7#,Dxh8#
1. ... Kf8 2. Dxh8#
1. ... Tg8,Tf8 2. De7#
1. ... 0-0?? illegal
Henrik Juel: The author name must be a pseudonym (2018-11-22)
Henrik Juel: double threat (2024-02-26)
A.Buchanan: (1) A comment from Volker might be helpful: was it really "John Doe", or is that Volker's joke? (2) What does C+ mean? A discussion in Facebook yesterday suggested "conforms with the author's expectation". Here each of the two threats is separately realized - to me that's sufficient. (2024-02-27)
Henrik Juel: I dislike the dual after 1... h6,h5 (2024-02-27)
comment
Henrik Juel: double threat (2024-02-26)
A.Buchanan: (1) A comment from Volker might be helpful: was it really "John Doe", or is that Volker's joke? (2) What does C+ mean? A discussion in Facebook yesterday suggested "conforms with the author's expectation". Here each of the two threats is separately realized - to me that's sufficient. (2024-02-27)
Henrik Juel: I dislike the dual after 1... h6,h5 (2024-02-27)
comment
Keywords: Minimal (D), Cant Castler, Miniature, Castling position, Doppeldrohung, Model mate (Gnaden-)
Genre: 2#, Retro
FEN: 4k2r/5p1p/3K4/8/8/8/5Q2/8
Input: Felber, Volker, 2018-11-22
Last update: Gunter Jordan, 2024-02-27 more...
Genre: 2#, Retro
FEN: 4k2r/5p1p/3K4/8/8/8/5Q2/8
Input: Felber, Volker, 2018-11-22
Last update: Gunter Jordan, 2024-02-27 more...
R: 1. Bc7xTb8=L Tb7-b8, dann 1. Ta7 c8=D#
Der letzte Zug von Weiß muß: Bc7xTb8 und wird Läufer gewesen sein. Schwarz hat vorher Tb7-b8+ gezogen. Nach Rücknahme des letzten Zuges von Weiß und des letzten Zuges von Schwarz ergibt sich daher die Stellung : Weiß: Kh8 Bc7; Schwarz: Ka8, Tb7. Schwarz zieht daher jetzt, um das Matt in einem Zug zu ermöglichen: Tb7-a7 worauf Weiß mit c7-c8=D matt setzt.
Cook: Co-NLs
R: 1. Ba7xLb8=L Kb7xTa8, dann 1. Ka6 axb8=D,axb8=T
R: 1. Ba7xSb8=L Kb7xTa8, dann 1. Ka6 axb8=D,axb8=T
Der letzte Zug von Weiß muß: Bc7xTb8 und wird Läufer gewesen sein. Schwarz hat vorher Tb7-b8+ gezogen. Nach Rücknahme des letzten Zuges von Weiß und des letzten Zuges von Schwarz ergibt sich daher die Stellung : Weiß: Kh8 Bc7; Schwarz: Ka8, Tb7. Schwarz zieht daher jetzt, um das Matt in einem Zug zu ermöglichen: Tb7-a7 worauf Weiß mit c7-c8=D matt setzt.
Cook: Co-NLs
R: 1. Ba7xLb8=L Kb7xTa8, dann 1. Ka6 axb8=D,axb8=T
R: 1. Ba7xSb8=L Kb7xTa8, dann 1. Ka6 axb8=D,axb8=T
Forderung im 'Boten von der Ybbs': "Weiß nimmt seinen letzten Zug zurück, dann nimmt Schwarz seinen letzten Zug zurück und dann zieht Schwarz so, daß Weiß in einem Zug matt-setzen kann!"
Motto: "Das Waidhofner Problem"
als Autor ist angegeben "Dr. S. Knirt", dabei dürfte es sich um ein Pseudonym von Dr. Otto Trinks handeln (S.Knirt rückwärts gelesen ergibt trinKS)
Adrian Storisteanu: See P0002517. (2024-03-19)
comment
Motto: "Das Waidhofner Problem"
als Autor ist angegeben "Dr. S. Knirt", dabei dürfte es sich um ein Pseudonym von Dr. Otto Trinks handeln (S.Knirt rückwärts gelesen ergibt trinKS)
Adrian Storisteanu: See P0002517. (2024-03-19)
comment
Keywords: Help retractor, Aristocrat, Minimal, Miniature, under-promotion (L), Promotion in the mating move
Genre: Retro
FEN: kB5K/8/8/8/8/8/8/8
Reprints: 13 Bote von der Ybbs 28/12/1929
Input: Mario Richter, 2021-05-14
Last update: Alfred Pfeiffer, 2021-08-16 more...
Genre: Retro
FEN: kB5K/8/8/8/8/8/8/8
Reprints: 13 Bote von der Ybbs 28/12/1929
Input: Mario Richter, 2021-05-14
Last update: Alfred Pfeiffer, 2021-08-16 more...
1. bxa3+ Kd4 2. Kb2#
Chess problem by AI program ChatGPT
Q: Can you give an example of a chess retrograde analysis problem?
A: A retrograde analysis problem in chess is a problem where the goal is to determine the sequence of moves that led to a given position. For example:
White to move and mate in 2
[FEN "8/8/1p6/1P6/3k4/8/8/K7 w - - 0 1"]
In this problem, the goal is to determine the two moves (one for white and one for black) that led to the position shown. The solution is 1. bxa3+ Kd4 2. Kb2#
Henrik Juel: I do not understand this at all
It seems that ChatGPT is worthless for retro problems (2023-01-29)
A.Buchanan: Generally ChatGPT is amazing. We have entered a new age. Interacting with it reminds me of the first time I sent emails, or used a browser: we have crossed a frontier into engage with a function that will soon be commonplace. I already use it as a work tool for the last week. However it has limited skills and I was surprised it even attempted to construct a chess problem. It’s failure is humorous and kind of dreamlike (2023-01-30)
Henrik Juel: Thanks for your clarification, Andrew
ChatGPT is so amazing that it will give you a grade of B on some university exams; using it is obviously cheating, but do you enforce it?
In my youth calculators were developing fast; initially I banned the use of calculators in my OR exam, but the students were unhappy about it, saying that they were allowed in high school; I was forced to allow calculators, but then the poor students pointed out that the rich students had an unfair advantage; I then bought a few hundred cheap calculators and let the students borrow one for the exam (the rich students were still mad, but had to accept their lot in the social-democratic society of Danmark) (2023-01-30)
comment
Q: Can you give an example of a chess retrograde analysis problem?
A: A retrograde analysis problem in chess is a problem where the goal is to determine the sequence of moves that led to a given position. For example:
White to move and mate in 2
[FEN "8/8/1p6/1P6/3k4/8/8/K7 w - - 0 1"]
In this problem, the goal is to determine the two moves (one for white and one for black) that led to the position shown. The solution is 1. bxa3+ Kd4 2. Kb2#
Henrik Juel: I do not understand this at all
It seems that ChatGPT is worthless for retro problems (2023-01-29)
A.Buchanan: Generally ChatGPT is amazing. We have entered a new age. Interacting with it reminds me of the first time I sent emails, or used a browser: we have crossed a frontier into engage with a function that will soon be commonplace. I already use it as a work tool for the last week. However it has limited skills and I was surprised it even attempted to construct a chess problem. It’s failure is humorous and kind of dreamlike (2023-01-30)
Henrik Juel: Thanks for your clarification, Andrew
ChatGPT is so amazing that it will give you a grade of B on some university exams; using it is obviously cheating, but do you enforce it?
In my youth calculators were developing fast; initially I banned the use of calculators in my OR exam, but the students were unhappy about it, saying that they were allowed in high school; I was forced to allow calculators, but then the poor students pointed out that the rich students had an unfair advantage; I then bought a few hundred cheap calculators and let the students borrow one for the exam (the rich students were still mad, but had to accept their lot in the social-democratic society of Danmark) (2023-01-30)
comment
Keywords: Joke, Kindergarten Problem, Minimal, Miniature
Genre: 2#, Retro
FEN: 8/8/1p6/1P6/3k4/8/8/K7
Reprints: Facebook 05/07/2023
Input: A.Buchanan, 2023-01-29
Last update: A.Buchanan, 2023-07-05 more...
Genre: 2#, Retro
FEN: 8/8/1p6/1P6/3k4/8/8/K7
Reprints: Facebook 05/07/2023
Input: A.Buchanan, 2023-01-29
Last update: A.Buchanan, 2023-07-05 more...
22 - P1409983
Andrey Frolkin
Werner Keym
1.67 Eigenartige Schachprobleme , p. 196, 2010
(10+2)
Letzter Zug?
Andrey Frolkin
Werner Keym
1.67 Eigenartige Schachprobleme , p. 196, 2010
(10+2)
Letzter Zug?
R: 1. g3xBh4 h5-h4 and e.g. 2. Kf4-g5 Kh4-h3
Keywords: Economy record (Last Move? Type A), Last Move? (BxB), Non-standard material (L), Type A, Type B (a fortiori), Economy record (Last Move? Type B), Minimal
Genre: Retro
FEN: 8/1p5P/6PP/5BK1/6PP/5B1k/6NP/8
Input: A.Buchanan, 2023-05-28
Last update: A.Buchanan, 2023-05-31 more...
Genre: Retro
FEN: 8/1p5P/6PP/5BK1/6PP/5B1k/6NP/8
Input: A.Buchanan, 2023-05-28
Last update: A.Buchanan, 2023-05-31 more...
23 - P1410903
Mu-Tsun Tsai
Dream Yeh
MatPlus.net Forum 14/07/2023
(16+2)
What is curious about this position?
Mu-Tsun Tsai
Dream Yeh
MatPlus.net Forum 14/07/2023
(16+2)
What is curious about this position?
R: 1. d5xe6ep# e7-e5 2. d4-d5+
Mu-Tsun Tsai: Previous record is P1410861 (2023-07-14)
Mu-Tsun Tsai: Original design was 8/2N5/3PPkPR/rP6/B5PP/8/3PPN2/B2RqQK1, but that leads to a surprising cook: remove both d2 and f2, and retract -1. fxe6ep# e7 -2. Rd4+! (2023-07-14)
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Mu-Tsun Tsai: Original design was 8/2N5/3PPkPR/rP6/B5PP/8/3PPN2/B2RqQK1, but that leads to a surprising cook: remove both d2 and f2, and retract -1. fxe6ep# e7 -2. Rd4+! (2023-07-14)
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Keywords: Economy record, En passant, En passant in the retro play, Last Moves? (3), Minimal
Genre: Retro, Fairies
FEN: 3Q1R2/2N1PP2/5k2/7P/2P4P/6N1/3PPP2/B2BqRK1
Input: James Malcom, 2023-07-14
Last update: James Malcom, 2023-09-09 more...
Genre: Retro, Fairies
FEN: 3Q1R2/2N1PP2/5k2/7P/2P4P/6N1/3PPP2/B2BqRK1
Input: James Malcom, 2023-07-14
Last update: James Malcom, 2023-09-09 more...
1. Dxa2 Th4 2. Da4 Txa4#
1. Dxb2 0-0?? 2. Da3 Lxa3# because Ke1 moved to let Ka1 in
1. Dxb2 0-0?? 2. Da3 Lxa3# because Ke1 moved to let Ka1 in
25 - P1414063
Andrew Buchanan
The Puzzling Side of Chess 228 31/10/2023
(14+2)
Dead position, with check, maximizing the number of legal but unplayable moves.
Andrew Buchanan
The Puzzling Side of Chess 228 31/10/2023
(14+2)
Dead position, with check, maximizing the number of legal but unplayable moves.
20 legal but unplayable moves.
Black just played c6xd5+ or exd5+, not d6-d5? which would have ended the game in prior dead position.
Henrik Juel: The position is displayed by clicking on one of the five animation symbols and then moving the cursor (2023-12-14)
Henrik Juel: ... and then moving the cursor up (2023-12-14)
A.Buchanan: I think the phrase "legal but unplayable" is happier than "impossible", so I will use the former (2023-12-14)
A.Buchanan: Have reverted to the mode in which PDB shows the diagram directly, rather than having to click animation. (2023-12-16)
more ...
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Henrik Juel: ... and then moving the cursor up (2023-12-14)
A.Buchanan: I think the phrase "legal but unplayable" is happier than "impossible", so I will use the former (2023-12-14)
A.Buchanan: Have reverted to the mode in which PDB shows the diagram directly, rather than having to click animation. (2023-12-16)
more ...
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Keywords: Construction record, Minimal, Dead Position, Type C, Non-standard material (TTLSSSS)
Genre: Retro, Mathematics
FEN: B5Bk/2NRN3/1N3N2/R2p2R1/2KR1N2/4N3/6Q1/8
Input: A.Buchanan, 2023-12-14
Last update: A.Buchanan, 2023-12-16 more...
Genre: Retro, Mathematics
FEN: B5Bk/2NRN3/1N3N2/R2p2R1/2KR1N2/4N3/6Q1/8
Input: A.Buchanan, 2023-12-14
Last update: A.Buchanan, 2023-12-16 more...
Show statistic for complete result. Show search result faster by using ids.
https://pdb.dieschwalbe.de/search.jsp?expression=COMMENTDATE%3E%3D20220810+AND+G%3D%27Retro%27+AND+NOT+A%3D%27Nouguier%2C+Henri%27+AND+K%3D%27Minimal%27
The problems of this query have been registered by the following contributors:
Gerd Wilts (11)Frank Müller (2)
Zuncke/Bruder (2)
Mario Richter (2)
A.Buchanan (4)
Rainer Staudte (1)
Felber, Volker (1)
James Malcom (1)
Miguel Ambrona (1)
Miguel Ambrona: The fix proposed by Adrian works.
Verified with Deadpos v.2.2. (2024-01-12)
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