25 problem(s) found in 867 milliseconds (displaying 25 problem(s)). [COMMENTDATE>=20220125 AND K='Dummybauer'] [download as LaTeX]
a) 1. "Ta1-d1+?" ... Td4 2. Txd4# (Completing the illegal castling!)
b) 1. "xc5ep+?" ... Tb5 2. Txb5# (Completing the illegal e.p.!)
c) 1. "xe8=S+?" ... e6 2. Sf6# (Completing the illegal promotion!)
0) 1. Sxe7+! Lxe7 2. f8=B# (Truncating the promotion move!)
n in directmate stipulation #n means that White has n moves to do the job. With n=1.5, therefore, one of the White moves is fractional, so we know we are in the realm of jokes, ho ho!
If White's first move is the fractional one, there are three retro tries which attempt to complete: castling, ep & promotion. However all are illegal:
castling: 8 white pawns, so wTa5 came from h1, dislodging wK.
ep: retracting sBc5 to c7 means wLb8 is promoted, but 8 white pawns.
promotion: white made 7 pawn captures, while sBgh were waylaid.
So we consider that White's second move was the fractional one, by omitting the replacement of wBf8 by an officer.
b) 1. "xc5ep+?" ... Tb5 2. Txb5# (Completing the illegal e.p.!)
c) 1. "xe8=S+?" ... e6 2. Sf6# (Completing the illegal promotion!)
0) 1. Sxe7+! Lxe7 2. f8=B# (Truncating the promotion move!)
n in directmate stipulation #n means that White has n moves to do the job. With n=1.5, therefore, one of the White moves is fractional, so we know we are in the realm of jokes, ho ho!
If White's first move is the fractional one, there are three retro tries which attempt to complete: castling, ep & promotion. However all are illegal:
castling: 8 white pawns, so wTa5 came from h1, dislodging wK.
ep: retracting sBc5 to c7 means wLb8 is promoted, but 8 white pawns.
promotion: white made 7 pawn captures, while sBgh were waylaid.
So we consider that White's second move was the fractional one, by omitting the replacement of wBf8 by an officer.
Keywords: En passant, Start a move but do not finish it, Castling, Promotion (S,B), Valladao Task (half!), Joke (End move, Start move), Dummy Pawn (not! Start move), Complete an unfinished move, waylaid (sBgh)
Genre: Retro, 2#
FEN: 1B1N1bB1/p2ppP2/2P5/R1pk1N2/1r2p3/1P2P1P1/4PP1P/R1K5
Reprints: (III) Quartz 4 1997
Input: Gerd Wilts, 1997-06-21
Last update: A.Buchanan, 2023-04-08 more...
Genre: Retro, 2#
FEN: 1B1N1bB1/p2ppP2/2P5/R1pk1N2/1r2p3/1P2P1P1/4PP1P/R1K5
Reprints: (III) Quartz 4 1997
Input: Gerd Wilts, 1997-06-21
Last update: A.Buchanan, 2023-04-08 more...
1. Sf7! Txf7 2. Ka8 Txc7 3. b8=B! ... Patt
Alfred Pfeiffer: Bis 1904 war nach den Regeln eine "Umwandlung" in Dummy-Bauer erlaubt.
1862 British Chess Association rule:
"Code of Laws of the British Chess Association" In that code, Law XIII said, "When a pawn has reached the eighth square, the player has the option of selecting a piece, whether such piece has previously been lost or not, whose names and powers it shall then assume, or of deciding that it shall remain a pawn."
Die Umwandlung in Dummy-Bauer wure erst 1904 offiziell abgeschafft. Daher würde ich bei Aufgaben aus jener Epoche nicht von "Scherzaufgaben" oder "Umwandlungsscherzen" sprechen. (2020-02-12)
James Malcom: While you are correct, it is the best possible classification for them in the modern era in my opinion. We shall speak of them as such, but shall we at least classify them as such? (2020-02-12)
Mario Richter: Alfred is only partially correct: this strange Law XIII was only valid in the British Chess Association - many other countries had rule sets without allowing dummy pawns (e.g. Germany, Russia, France, to name a few). Or to put it with the words of the 'Philadelphia Times' 03.01.1886 p.7: "the 'Dummy pawn' code of 1862 ... , has never, outside of a very limited circle, received any recognition."
I have nothing against the classification as "joke" and "joke promotion", since we're classifiying the problems from a today's perspective.
In an alternative for is to be found, Daniel VanArsdale, in his Web-article about Loyd's dummy pawn problem (P1265742) uses the term "Liberated promotion" (s. a href="http://www.silcom.com/~barnowl/Sam_Loyd%27s_Dummy_Promotion.html"http://www.silcom.com/~barnowl/Sam_Loyd%27s_Dummy_Promotion.html/a) (2020-02-12)
A.Buchanan: Mario, thanks for the link to VanArsdale's sympathetic article. You allow that a Dummy Pawn problem can be a joke, but so could *anything*, so you conceded nothing. We can do much better than this to respect the diversity of our history, our present and our future. Key idea: there is nothing about "today's perspective" that warrants special treatment.
Different rule sets, different generations of FIDE Laws, different Codex editions, different individuals across time and space are in fundamental disagreement about relatively minor aspects of the rules and problem conventions. A random example today is that the problem world silently ignores the USCF Laws. Is this fair? Probably not. Because their assumptions disagree with one another, not all problems can be "orthodox". But to say that the punishment for losing a theological debate is to be banished to the realms of fairy or joke is too great. It makes a completely unnecessary and cruel zero-sum game of the business.
I think there is merit in moving beyond these secondary squabbles to find a "canonical" set of problem chess rules (1) as a foundation for fairy chess (2) a basis for programming, especially retro conventions and (3) a more comprehensible world for newcomers who are increasingly attracted to our hobby. How to do this without theological acrimony? This canonical set should involve a minimum of imposition: it should based on be a careful but not over-literal reading of the FIDE Laws and Codex today, and grounded in a formal specification language to avoid ambiguity. I've got a plan for this and have shared the first pseudo-code draft with some people already. If you are interested, please get in touch.
So what about problems that don't fit? As a principle, I propose that all problems which were for some group or at some time completely legal and orthodox can *never* lose that status. They are in a special immortal class: "Golden Age". They are neither joke nor fairy, neither illegal nor unsound. They are both orthodox and unorthodox. And we record carefully how each such problem class differs from the canon. We make sure they never become unintelligible. Some are historical but many are being composed today, and there is no shame attached to them. They light up the evolutionary journey of our hobby, and in their rarity they are in some ways more interesting than the vast number of orthodox problems which may be forgotten more quickly.
If a Golden Age problem is submitted to a tourney today, then the "genre" would probably be fairy or retro, but of course this classification is the coarsest level of roll-up for tourney purposes only, and does not mean that the nature of the problem is necessarily fairy or retro.
Dummy Pawn was enjoyed by some, including World Champion Wilhelm Steinitz, and excited wrath among others, including World Champion wannabe Howard Staunton. Now that the dust of controversy from the 1800s has settled, its value today is (1) as a fresh, fecund and paradoxical design space and (2) as a relatively uncontroversial poster-child prototype for Golden Age as a mechanism to allow us all to better agree to disagree. (2022-02-08)
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1862 British Chess Association rule:
"Code of Laws of the British Chess Association" In that code, Law XIII said, "When a pawn has reached the eighth square, the player has the option of selecting a piece, whether such piece has previously been lost or not, whose names and powers it shall then assume, or of deciding that it shall remain a pawn."
Die Umwandlung in Dummy-Bauer wure erst 1904 offiziell abgeschafft. Daher würde ich bei Aufgaben aus jener Epoche nicht von "Scherzaufgaben" oder "Umwandlungsscherzen" sprechen. (2020-02-12)
James Malcom: While you are correct, it is the best possible classification for them in the modern era in my opinion. We shall speak of them as such, but shall we at least classify them as such? (2020-02-12)
Mario Richter: Alfred is only partially correct: this strange Law XIII was only valid in the British Chess Association - many other countries had rule sets without allowing dummy pawns (e.g. Germany, Russia, France, to name a few). Or to put it with the words of the 'Philadelphia Times' 03.01.1886 p.7: "the 'Dummy pawn' code of 1862 ... , has never, outside of a very limited circle, received any recognition."
I have nothing against the classification as "joke" and "joke promotion", since we're classifiying the problems from a today's perspective.
In an alternative for is to be found, Daniel VanArsdale, in his Web-article about Loyd's dummy pawn problem (P1265742) uses the term "Liberated promotion" (s. a href="http://www.silcom.com/~barnowl/Sam_Loyd%27s_Dummy_Promotion.html"http://www.silcom.com/~barnowl/Sam_Loyd%27s_Dummy_Promotion.html/a) (2020-02-12)
A.Buchanan: Mario, thanks for the link to VanArsdale's sympathetic article. You allow that a Dummy Pawn problem can be a joke, but so could *anything*, so you conceded nothing. We can do much better than this to respect the diversity of our history, our present and our future. Key idea: there is nothing about "today's perspective" that warrants special treatment.
Different rule sets, different generations of FIDE Laws, different Codex editions, different individuals across time and space are in fundamental disagreement about relatively minor aspects of the rules and problem conventions. A random example today is that the problem world silently ignores the USCF Laws. Is this fair? Probably not. Because their assumptions disagree with one another, not all problems can be "orthodox". But to say that the punishment for losing a theological debate is to be banished to the realms of fairy or joke is too great. It makes a completely unnecessary and cruel zero-sum game of the business.
I think there is merit in moving beyond these secondary squabbles to find a "canonical" set of problem chess rules (1) as a foundation for fairy chess (2) a basis for programming, especially retro conventions and (3) a more comprehensible world for newcomers who are increasingly attracted to our hobby. How to do this without theological acrimony? This canonical set should involve a minimum of imposition: it should based on be a careful but not over-literal reading of the FIDE Laws and Codex today, and grounded in a formal specification language to avoid ambiguity. I've got a plan for this and have shared the first pseudo-code draft with some people already. If you are interested, please get in touch.
So what about problems that don't fit? As a principle, I propose that all problems which were for some group or at some time completely legal and orthodox can *never* lose that status. They are in a special immortal class: "Golden Age". They are neither joke nor fairy, neither illegal nor unsound. They are both orthodox and unorthodox. And we record carefully how each such problem class differs from the canon. We make sure they never become unintelligible. Some are historical but many are being composed today, and there is no shame attached to them. They light up the evolutionary journey of our hobby, and in their rarity they are in some ways more interesting than the vast number of orthodox problems which may be forgotten more quickly.
If a Golden Age problem is submitted to a tourney today, then the "genre" would probably be fairy or retro, but of course this classification is the coarsest level of roll-up for tourney purposes only, and does not mean that the nature of the problem is necessarily fairy or retro.
Dummy Pawn was enjoyed by some, including World Champion Wilhelm Steinitz, and excited wrath among others, including World Champion wannabe Howard Staunton. Now that the dust of controversy from the 1800s has settled, its value today is (1) as a fresh, fecund and paradoxical design space and (2) as a relatively uncontroversial poster-child prototype for Golden Age as a mechanism to allow us all to better agree to disagree. (2022-02-08)
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Keywords: Dummy Pawn, Golden Age (Dummy Pawn)
Genre: Studies
FEN: 1K5N/pPP3rr/8/6p1/8/4p1k1/4P3/8
Reprints: (14) MatPlus.net Forum 13/5/2020
Input: James Malcom, 2020-02-11
Last update: A.Buchanan, 2023-08-04 more...
Genre: Studies
FEN: 1K5N/pPP3rr/8/6p1/8/4p1k1/4P3/8
Reprints: (14) MatPlus.net Forum 13/5/2020
Input: James Malcom, 2020-02-11
Last update: A.Buchanan, 2023-08-04 more...
1. Sg6 g1=D 2. Se5 Dxc5 3. Sc4#
Nach den "alten Regeln korrekt", aber inkorrekt, wenn "dummy pawns" erlaubt sind:
1. Sg6 g1=B! "and White cannot possibly mate in two more moves."
Nach den "alten Regeln korrekt", aber inkorrekt, wenn "dummy pawns" erlaubt sind:
1. Sg6 g1=B! "and White cannot possibly mate in two more moves."
von Pavitt als Beispiel dafür konstruiert, daß die auf dem Londoner Schachkongress beschlossene Änderung der Umwandlungsregel für den Britischen Schachverband (d.h. die Möglichkeit der UW in einen "dummy pawn") auch Auswirkungen auf die Schachkomposition hat:
1. Probleme, die nach den alten Regeln korrekt waren, können inkorrekt werden (wie dieses)
2. Da andere Schachverbände diese Regel nicht adaptiert haben, muß bei Problemen mit UW stets angegeben werden, nach welchen Regeln zu lösen ist.
Correct according to the "old rules", but incorrect if "dummy pawns" are allowed:
1. Sg6 g1=B! "and White cannot possibly mate in two more moves."
Constructed by Pavitt as an example of how the change in the conversion rule for the British Chess Federation decided at the London Chess Congress (i.e. the possibility of UW into a "dummy pawn") also has implications for chess composition:
1. problems that were correct under the old rules may become incorrect (like this one).
2. since other chess federations have not adapted this rule, problems with UW must always indicate according to which rules to solve.
s.a. Version P1372932
Henrik Juel: C+ by Popeye 4.61, except for double threat 2.Se5,Se7 (2020-02-26)
A.Buchanan: The defect for me is that the threat 2. Se7 is not separately shown in actual play. Compare: 1. Sg6 g1=D 2. Se5 thr 3. Sc4#,Sxc6# but both threats are forced separately by specific sD moves. (2022-01-26)
comment
1. Probleme, die nach den alten Regeln korrekt waren, können inkorrekt werden (wie dieses)
2. Da andere Schachverbände diese Regel nicht adaptiert haben, muß bei Problemen mit UW stets angegeben werden, nach welchen Regeln zu lösen ist.
Correct according to the "old rules", but incorrect if "dummy pawns" are allowed:
1. Sg6 g1=B! "and White cannot possibly mate in two more moves."
Constructed by Pavitt as an example of how the change in the conversion rule for the British Chess Federation decided at the London Chess Congress (i.e. the possibility of UW into a "dummy pawn") also has implications for chess composition:
1. problems that were correct under the old rules may become incorrect (like this one).
2. since other chess federations have not adapted this rule, problems with UW must always indicate according to which rules to solve.
s.a. Version P1372932
Henrik Juel: C+ by Popeye 4.61, except for double threat 2.Se5,Se7 (2020-02-26)
A.Buchanan: The defect for me is that the threat 2. Se7 is not separately shown in actual play. Compare: 1. Sg6 g1=D 2. Se5 thr 3. Sc4#,Sxc6# but both threats are forced separately by specific sD moves. (2022-01-26)
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Keywords: Dummy Pawn (not!), Promotion (d)
Genre: 3#
Computer test: Popeye 4.61
FEN: K7/2N5/2p5/k1P3R1/p4N2/P2P4/6p1/8
Reprints: chess.stackexchange.com 6/5/2020
Input: Mario Richter, 2020-02-26
Last update: A.Buchanan, 2022-01-26 more...
Genre: 3#
Computer test: Popeye 4.61
FEN: K7/2N5/2p5/k1P3R1/p4N2/P2P4/6p1/8
Reprints: chess.stackexchange.com 6/5/2020
Input: Mario Richter, 2020-02-26
Last update: A.Buchanan, 2022-01-26 more...
4 - P1375084
Edward Nathan Frankenstein
4 British Chess Magazine , p. 21, 1883
(4+3)
Add one Black man, and White mates in three moves
Edward Nathan Frankenstein
4 British Chess Magazine , p. 21, 1883
(4+3)
Add one Black man, and White mates in three moves
(+sBd1, dann) 1. Kf5 Kd3 2. De4+ Kd2 3. Lh6#
Add a black pawn on d1, then ...
Add a black pawn on d1, then ...
Henrik Juel: After the addition of sPd1, C+ Popeye 4.61 (2022-01-26)
Henrik Juel: Other variations
1... Kc4/Ke3 2.Dc2+/Lb4 (2022-01-26)
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Henrik Juel: Other variations
1... Kc4/Ke3 2.Dc2+/Lb4 (2022-01-26)
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Keywords: Dummy Pawn, Golden Age (Dummy Pawn), Add pieces (b)
Genre: 3#, Retro
FEN: 5B2/8/6K1/1p6/3k4/6p1/1P4Q1/8
Input: James Malcom, 2020-04-27
Last update: A.Buchanan, 2023-08-04 more...
Genre: 3#, Retro
FEN: 5B2/8/6K1/1p6/3k4/6p1/1P4Q1/8
Input: James Malcom, 2020-04-27
Last update: A.Buchanan, 2023-08-04 more...
5 - P1375654
Andrew Buchanan
(2) MatPlus.net Forum 09/05/2020
in memory of Wilhelm Steinitz
(13+14) C+
PG in 8.0 (-:
Andrew Buchanan
(2) MatPlus.net Forum 09/05/2020
in memory of Wilhelm Steinitz
(13+14) C+
PG in 8.0 (-:
1. f4 a5 2. f5 a4 3. f6 a3 4. fxe7 axb2 5. exf8=B! bxa1=L 6. Lb2 Ke7! 7. Lf6+ Ke6! 8. Sc3 Dxf8!
Henrik Juel: The solution is almost given away by the keywords
1.f4 a5 2.f5 a4 3.f6 a3 4.fxe7 axb2 5.exf8! bxa1=L 6.Lb2 Ke7 7.Lf6+ Ke6 8.Sc3 Dxf8
Even though Black captures the white man on f8, promotion to DTLS will not work
First Schnoebelen with dummy pawn as the captured man, I would think
Very good, Andrew (2020-05-08)
Henrik Juel: Another first:
Never before was a problem commented in the PDB before it was published... (2020-05-08)
James Malcom: When Andrew messaged me this asking about a PG with two dummies, I came back almost right away with the same idea, albeit in a flawed form-1. a4 f5 2. a5 f4 3. a6 f3 4. axb7 fxe2 5. bxa8=Q exd1 6. Ke2 e6 7. Ke3 Qg5+ 8. Kd4 Qxg2 9. Qf3 Qxh1 10. Qxd1. Great minds think alike after all! The best way. I think, to have two dummies is to have one per side and have both kings make the same journey. An idea to make it all unique is the problem though. (2020-05-08)
A.Buchanan: Haha Henrik thank you. Well I'm in lockdown in Singapore, and it was 9-May already when I posted in Matplus. (2020-05-09)
A.Buchanan: Can claim that this is not Schnoebelen because the pawn wasn't promoted! Just remained as a pawn! But I'm sure the Schnoebelen theme was interpreted in a looser sense in 1860s. Although exponents in that era would have been baffled as to *why* the theme was termed "Schnoebelen", as Philippe was not yet born. (2020-05-09)
Henrik Juel: I am sorry to learn about the Singapore lockdown, but here the merriment has no bounds (apart from the notational dilemma: exf8 is not a promotion and still the PDB animation requires exf8=B) (2020-05-09)
Olaf Jenkner: If you consider each pawn move onto the 8th rank as a promotion then we have the Schnoebelen. (2020-05-09)
A.Buchanan: This is not "non-standard material", removing that keyword. (2022-01-26)
more ...
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1.f4 a5 2.f5 a4 3.f6 a3 4.fxe7 axb2 5.exf8! bxa1=L 6.Lb2 Ke7 7.Lf6+ Ke6 8.Sc3 Dxf8
Even though Black captures the white man on f8, promotion to DTLS will not work
First Schnoebelen with dummy pawn as the captured man, I would think
Very good, Andrew (2020-05-08)
Henrik Juel: Another first:
Never before was a problem commented in the PDB before it was published... (2020-05-08)
James Malcom: When Andrew messaged me this asking about a PG with two dummies, I came back almost right away with the same idea, albeit in a flawed form-1. a4 f5 2. a5 f4 3. a6 f3 4. axb7 fxe2 5. bxa8=Q exd1 6. Ke2 e6 7. Ke3 Qg5+ 8. Kd4 Qxg2 9. Qf3 Qxh1 10. Qxd1. Great minds think alike after all! The best way. I think, to have two dummies is to have one per side and have both kings make the same journey. An idea to make it all unique is the problem though. (2020-05-08)
A.Buchanan: Haha Henrik thank you. Well I'm in lockdown in Singapore, and it was 9-May already when I posted in Matplus. (2020-05-09)
A.Buchanan: Can claim that this is not Schnoebelen because the pawn wasn't promoted! Just remained as a pawn! But I'm sure the Schnoebelen theme was interpreted in a looser sense in 1860s. Although exponents in that era would have been baffled as to *why* the theme was termed "Schnoebelen", as Philippe was not yet born. (2020-05-09)
Henrik Juel: I am sorry to learn about the Singapore lockdown, but here the merriment has no bounds (apart from the notational dilemma: exf8 is not a promotion and still the PDB animation requires exf8=B) (2020-05-09)
Olaf Jenkner: If you consider each pawn move onto the 8th rank as a promotion then we have the Schnoebelen. (2020-05-09)
A.Buchanan: This is not "non-standard material", removing that keyword. (2022-01-26)
more ...
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Keywords: Unique Proof Game, Schnoebelen Theme (B), Phoenix (l), Prentos Theme (B), Ceriani-Frolkin Theme (B), Dummy Pawn, Golden Age (Dummy Pawn), Promotion (Bl)
Genre: Retro
Computer test: Jacobi v0.7.4 2020-05-08
FEN: rnb2qnr/1ppp1ppp/4kB2/8/8/2N5/P1PPP1PP/b2QKBNR
Input: A.Buchanan, 2020-05-08
Last update: A.Buchanan, 2023-08-04 more...
Genre: Retro
Computer test: Jacobi v0.7.4 2020-05-08
FEN: rnb2qnr/1ppp1ppp/4kB2/8/8/2N5/P1PPP1PP/b2QKBNR
Input: A.Buchanan, 2020-05-08
Last update: A.Buchanan, 2023-08-04 more...
1. f4 b5 2. f5 b4 3. f6 b3 4. fxe7 bxc2 5. exf8=B cxb1=L 6. Da4 Ke7 7. Dh4+ Ke6 8. g4 Se7 9. Lg2 Txf8 10. Lb7 Sc6 11. Lxc8 Tb8
Henrik Juel: What is the joke, James?
Natch 3.1 found no solution (2020-08-26)
James Malcom: The solution has now been added in, Henrik.
This PG has two purposes.
1) It is another exploration of what themes be realized with the dummy pawn involves.
2) It is also to push the boundaries of how long a dummy pawn PG can be made. (2020-08-27)
Henrik Juel: Thanks, James
Apparently you also extended the proof game; the one I tested was in 10.5
The solution shows the Schnoebelen theme, by the way (2020-08-27)
Henrik Juel: You forgot to remove wPf2 from the diagram position (2020-08-27)
James Malcom: Removed, and yes I did manage to find a way to extend it by a ply, in theme for its purpose. The version is also C+. (2020-08-27)
A.Buchanan: I think sLb1 is kind of anti-Belfort Any way to replace it with a Phoenix/Prenix knight? (2020-08-27)
Henrik Juel: Strictly speaking, this is not Belfort, which requires two units to stand away
As Andrew suggests, if sLb1 were a black knight, we would have Belfort (2020-08-27)
A.Buchanan: It's limiting to just talk about Belfort Theme - one historical tourney which had a fiddly constraint about the number of pieces exhibiting the property. Want really to talk more generally about Belfort *Effect*, which is a property of a single unit (2022-01-26)
comment
Natch 3.1 found no solution (2020-08-26)
James Malcom: The solution has now been added in, Henrik.
This PG has two purposes.
1) It is another exploration of what themes be realized with the dummy pawn involves.
2) It is also to push the boundaries of how long a dummy pawn PG can be made. (2020-08-27)
Henrik Juel: Thanks, James
Apparently you also extended the proof game; the one I tested was in 10.5
The solution shows the Schnoebelen theme, by the way (2020-08-27)
Henrik Juel: You forgot to remove wPf2 from the diagram position (2020-08-27)
James Malcom: Removed, and yes I did manage to find a way to extend it by a ply, in theme for its purpose. The version is also C+. (2020-08-27)
A.Buchanan: I think sLb1 is kind of anti-Belfort Any way to replace it with a Phoenix/Prenix knight? (2020-08-27)
Henrik Juel: Strictly speaking, this is not Belfort, which requires two units to stand away
As Andrew suggests, if sLb1 were a black knight, we would have Belfort (2020-08-27)
A.Buchanan: It's limiting to just talk about Belfort Theme - one historical tourney which had a fiddly constraint about the number of pieces exhibiting the property. Want really to talk more generally about Belfort *Effect*, which is a property of a single unit (2022-01-26)
comment
Keywords: Belfort (L), Dummy Pawn, Schnoebelen Theme, Golden Age (Dummy Pawn), Ceriani-Frolkin Theme (B), Prentos Theme (B), Unique Proof Game, Non-standard material (l)
Genre: Retro
Computer test: Jacobi v.0.7.5
FEN: 1rBq1r2/p1ppnppp/2n1k3/8/6PQ/8/PP1PP2P/RbB1K1NR
Input: James Malcom, 2020-08-26
Last update: A.Buchanan, 2023-08-04 more...
Genre: Retro
Computer test: Jacobi v.0.7.5
FEN: 1rBq1r2/p1ppnppp/2n1k3/8/6PQ/8/PP1PP2P/RbB1K1NR
Input: James Malcom, 2020-08-26
Last update: A.Buchanan, 2023-08-04 more...
1. h8=T+! Sh6 2. exd8=K! b3 3. a8=sS! b2 4. b8=sL! La7 5. e4 Lb8 6. e5 La7 7. e6 Lb8 8. e7 La7 9. e8=B! Lb8 10. Ta4 La7 11. Txa7 g4#
A rather... complicated "joke."
A rather... complicated "joke."
A.Buchanan: If one allows promotion to sB (and there seems no reason to disallow it since promotion to pawn, king and foreign units are allowed) then the problem is cooked. There is no universally agreed notion of how a pawn can move if it starts on the first rank. Does it get a double hop, and if so on which rank? But the problem is unsound in any case. (2022-02-10)
James Malcom: That is if, yes. But I don't think this problem ought to be left as is: a demonstration of the levels of absurdity and tomfoolery old rules used to allow. Promotion to a piece of another color and dummies were loopholes, yes, but promotion to a black pawn was never included, not even implicitly. All pawns are pieces, but not all pieces are pawns. (2022-02-10)
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James Malcom: That is if, yes. But I don't think this problem ought to be left as is: a demonstration of the levels of absurdity and tomfoolery old rules used to allow. Promotion to a piece of another color and dummies were loopholes, yes, but promotion to a black pawn was never included, not even implicitly. All pawns are pieces, but not all pieces are pawns. (2022-02-10)
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Keywords: Joke promotion (Ksl), Dummy Pawn, konsekutive Umwandlungen 5 (TKslB), under-promotion key (T), Excelsior white, Golden Age (Dummy Pawn), Illegal position (no wK), Joke
Genre: s#, Fairies
Computer test: Difficult to test at the moment because no engine allows both normal and adversarial promotion.
FEN: 2Rr2n1/PPpBP2P/1pP5/1N4pk/1p4Rb/6pP/4P1P1/1Q6
Input: James Malcom, 2020-11-14
Last update: A.Buchanan, 2023-12-11 more...
Genre: s#, Fairies
Computer test: Difficult to test at the moment because no engine allows both normal and adversarial promotion.
FEN: 2Rr2n1/PPpBP2P/1pP5/1N4pk/1p4Rb/6pP/4P1P1/1Q6
Input: James Malcom, 2020-11-14
Last update: A.Buchanan, 2023-12-11 more...
SCHRECKE: Die Idee ist als Miniatur darstellbar!
W: Kh4,Ta1,Ld1,Sg1 (4) - S: Kh2,Be2,Bf2 (3)
Lösung: 1.e1B Lf3 2.f:g1B Ta2# (2022-01-25)
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W: Kh4,Ta1,Ld1,Sg1 (4) - S: Kh2,Be2,Bf2 (3)
Lösung: 1.e1B Lf3 2.f:g1B Ta2# (2022-01-25)
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Keywords: Dummy Pawn, Golden Age (Dummy Pawn)
Genre: h#
Computer test: C+, popeye 4.87, bedingung UWnur D T L S B
FEN: 8/8/8/8/3RP2K/4P3/5ppk/7B
Input: James Malcom, 2022-01-16
Last update: A.Buchanan, 2023-08-04 more...
Genre: h#
Computer test: C+, popeye 4.87, bedingung UWnur D T L S B
FEN: 8/8/8/8/3RP2K/4P3/5ppk/7B
Input: James Malcom, 2022-01-16
Last update: A.Buchanan, 2023-08-04 more...
1. e1=B Lf3 2. d1=B Le3 3. f1=B Tb2#
AB: economy record for 3 Dummy Pawns in h#. Meredith. Black moves open 6 lines, White moves close 3 lines.
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Keywords: Dummy Pawn, Golden Age (Dummy Pawn)
Genre: h#
Computer test: C+ Popeye 4.79
FEN: 8/8/1Rb1qr2/8/7K/8/3ppp1k/r1BB4
Input: A.Buchanan, 2022-01-26
Last update: A.Buchanan, 2023-08-04 more...
Genre: h#
Computer test: C+ Popeye 4.79
FEN: 8/8/1Rb1qr2/8/7K/8/3ppp1k/r1BB4
Input: A.Buchanan, 2022-01-26
Last update: A.Buchanan, 2023-08-04 more...
10 - P1398666
James Malcom
Michael Schreckenbach
Andrew Buchanan
PDB Website 26/01/2022
(4+3) C+
h#2 (-:
James Malcom
Michael Schreckenbach
Andrew Buchanan
PDB Website 26/01/2022
(4+3) C+
h#2 (-:
1. g1=B Lf3 2. e1=B Te2#
AB: economy record for 2 Dummy Pawns in h#. Miniature. Aimless promotion.
Henrik Juel: wPg3 prevents cooks like 1.Kg1 Kg3 2.e1=DTLSB Txe1# (2022-01-27)
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Henrik Juel: wPg3 prevents cooks like 1.Kg1 Kg3 2.e1=DTLSB Txe1# (2022-01-27)
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Keywords: Dummy Pawn, Golden Age (Dummy Pawn), Miniature, Tempo Move (Promotion)
Genre: h#
Computer test: C+ Popeye 4.79
FEN: 8/8/8/8/4R2K/6P1/4p1pk/7B
Input: A.Buchanan, 2022-01-27
Last update: A.Buchanan, 2023-08-04 more...
Genre: h#
Computer test: C+ Popeye 4.79
FEN: 8/8/8/8/4R2K/6P1/4p1pk/7B
Input: A.Buchanan, 2022-01-27
Last update: A.Buchanan, 2023-08-04 more...
11 - P1398987
Ado Kraemer
Andrew Buchanan
PDB Website 10/02/2022
AK, correction AB
(2+8)
#3
(-:
hint rot13.com:qrynl pubvpr bs cebzbgrq havg
Ado Kraemer
Andrew Buchanan
PDB Website 10/02/2022
AK, correction AB
(2+8)
#3
(-:
hint rot13.com:qrynl pubvpr bs cebzbgrq havg
1. "b8..."
1. ... g2 "...=S!" 2. Sd7 g3 3. Sf6#
1. ... h2 "...=D!" 2. Df8 Th3 3. Dxh6#
If White were prescient, they could choose which unit to promote to, based on knowledge of Black's next move. As it is, White plays 1.b8, then only chooses the promotion officer when Black's response is known.
1. ... g2 "...=S!" 2. Sd7 g3 3. Sf6#
1. ... h2 "...=D!" 2. Df8 Th3 3. Dxh6#
If White were prescient, they could choose which unit to promote to, based on knowledge of Black's next move. As it is, White plays 1.b8, then only chooses the promotion officer when Black's response is known.
Supersedes the dualized and inexact P1373527
White waits for Black to move before selecting the promoted unit.
Under this joke, a dummy pawn exists ephemerally, but not via the Dummy Pawn rule.
Position comfortably legal.
Henrik Juel: Andrew, how does one decode the rot13 hint? (2022-02-10)
Henrik Juel: Never mind, Andrew; write the english alphabet in two rows and code/decode between rows
abcdefghijklm
nopqrstuvwxyz
so the gobbledygook translates to
delay choice of promoted unit (2022-02-10)
Henrik Juel: ... the rows should be written with a fixed font, of course, but I do not know how to accomplish this in a PDB comment (2022-02-10)
A.Buchanan: Hi Henrik: got to rot13.com and put the text in the input box, read it from the output box. Because 13=26/2, this works for both encryption and decryption.
Trying to do this for new jokes to create a level playing field. If you want a hint as to the silly trick, but would still enjoy solving the chess afterwards, then check out the rot13. (2022-02-10)
A.Buchanan: The real challenge is getting animation to work properly in this site. (2022-02-10)
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White waits for Black to move before selecting the promoted unit.
Under this joke, a dummy pawn exists ephemerally, but not via the Dummy Pawn rule.
Position comfortably legal.
Henrik Juel: Andrew, how does one decode the rot13 hint? (2022-02-10)
Henrik Juel: Never mind, Andrew; write the english alphabet in two rows and code/decode between rows
abcdefghijklm
nopqrstuvwxyz
so the gobbledygook translates to
delay choice of promoted unit (2022-02-10)
Henrik Juel: ... the rows should be written with a fixed font, of course, but I do not know how to accomplish this in a PDB comment (2022-02-10)
A.Buchanan: Hi Henrik: got to rot13.com and put the text in the input box, read it from the output box. Because 13=26/2, this works for both encryption and decryption.
Trying to do this for new jokes to create a level playing field. If you want a hint as to the silly trick, but would still enjoy solving the chess afterwards, then check out the rot13. (2022-02-10)
A.Buchanan: The real challenge is getting animation to work properly in this site. (2022-02-10)
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Keywords: Joke (delayed promotion), Minimal, Dummy Pawn (not! Delayed promo)
Genre: Fairies
FEN: 8/1P5K/6pp/6pk/6pr/6pp/8/8
Input: A.Buchanan, 2022-02-10
Last update: A.Buchanan, 2023-05-21 more...
Genre: Fairies
FEN: 8/1P5K/6pp/6pk/6pr/6pp/8/8
Input: A.Buchanan, 2022-02-10
Last update: A.Buchanan, 2023-05-21 more...
James Malcom: I had a thought looking at this again. Does n7/1P2P3/Q3P3/1r6/N1k1KP2/Pr6/B2p1p2/n7 work to save another piece? (2022-04-02)
A.Buchanan: James, yes your version does save another unit for your lovely idea. Beyond this, a version n7/1P2P3/Q7/Br6/2kPKP2/1r6/B2p1p2/n7 saves another unit, and forces a unique order on the Black promotions too. To avoid distracting unachievable threats, set NoThreat as well as the usual NoShortVariations. Your composition has driven me finally to report a long-standing Olive bug that cruelly punishes we Dummy Pawn enthusiasts: https://github.com/dturevski/olive-gui/issues/54. (2022-04-03)
James Malcom: Thanks for the verification and shaving off a unit, Andrew. (2022-04-03)
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A.Buchanan: James, yes your version does save another unit for your lovely idea. Beyond this, a version n7/1P2P3/Q7/Br6/2kPKP2/1r6/B2p1p2/n7 saves another unit, and forces a unique order on the Black promotions too. To avoid distracting unachievable threats, set NoThreat as well as the usual NoShortVariations. Your composition has driven me finally to report a long-standing Olive bug that cruelly punishes we Dummy Pawn enthusiasts: https://github.com/dturevski/olive-gui/issues/54. (2022-04-03)
James Malcom: Thanks for the verification and shaving off a unit, Andrew. (2022-04-03)
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Keywords: Dummy Pawn, Golden Age (Dummy Pawn), Superseded by (P1411297)
Genre: Fairies, r#
Computer test: Henrik Juel: C+ Popeye 4.87 (2022-04-02)
FEN: n7/1P2P3/Q7/Br6/2kPKP2/1r6/B2p1p2/n7
Input: James Malcom, 2022-04-02
Last update: A.Buchanan, 2023-12-14 more...
Genre: Fairies, r#
Computer test: Henrik Juel: C+ Popeye 4.87 (2022-04-02)
FEN: n7/1P2P3/Q7/Br6/2kPKP2/1r6/B2p1p2/n7
Input: James Malcom, 2022-04-02
Last update: A.Buchanan, 2023-12-14 more...
1. Dh7!
Keywords: Dummy Pawn (in diagram), Golden Age (Dummy Pawn)
FEN: 4b3/2R1N1n1/8/4p1p1/1N1k2r1/4p1r1/7Q/2Kp4
Input: James Malcom, 2023-01-14
Last update: A.Buchanan, 2023-08-04 more...
FEN: 4b3/2R1N1n1/8/4p1p1/1N1k2r1/4p1r1/7Q/2Kp4
Input: James Malcom, 2023-01-14
Last update: A.Buchanan, 2023-08-04 more...
1. e4 Sf6 2. Ke2 Sd5 3. exd5 g5 4. d6 Lh6 5. dxc7 0-0 6. cxb8 Da5 7. Ke3 g4+ 8. f4 gxf3ep+
Objective: record achievement of task. Promotion can be to either minor officer, but prefer to keep the "stem cell" to avoid arbitrary choice of non-standard material.
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Keywords: Unique Proof Game, Dummy Pawn (in diagram), Valladao Task, Golden Age (Dummy Pawn), Castling (sk), En passant
Genre: Retro
Computer test: HJ: with wSd8 C+ Stelvio 1.0
FEN: rn1P1rk1/ppp2p1p/3p1n1b/8/8/4Kp2/PPPP2PP/RNBQ1BNR
Input: A.Buchanan, 2023-03-19
Last update: A.Buchanan, 2023-08-04 more...
Genre: Retro
Computer test: HJ: with wSd8 C+ Stelvio 1.0
FEN: rn1P1rk1/ppp2p1p/3p1n1b/8/8/4Kp2/PPPP2PP/RNBQ1BNR
Input: A.Buchanan, 2023-03-19
Last update: A.Buchanan, 2023-08-04 more...
1. e4 Sf6 2. Ke2 Sd5 3. exd5 g5 4. d6 Lh6 5. dxc7 0-0 6. cxb8 Da5 7. Ke3 g4+ 8. f4 gxf3ep+
Objective: record achievement of task. Promotion can be to any officer, but prefer to keep the "stem cell" to avoid arbitrary choice of non-standard material.
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Keywords: Unique Proof Game, Dummy Pawn (in diagram), Valladao Task, Golden Age (Dummy Pawn), Castling (sk), En passant
Genre: Retro
Computer test: HJ: with wSb8 C+ Stelvio 1.0
FEN: rPb2rk1/pp1ppp1p/7b/q7/8/4Kp2/PPPP2PP/RNBQ1BNR
Input: A.Buchanan, 2023-03-19
Last update: A.Buchanan, 2023-08-04 more...
Genre: Retro
Computer test: HJ: with wSb8 C+ Stelvio 1.0
FEN: rPb2rk1/pp1ppp1p/7b/q7/8/4Kp2/PPPP2PP/RNBQ1BNR
Input: A.Buchanan, 2023-03-19
Last update: A.Buchanan, 2023-08-04 more...
1. d4 Sf6 2. Kd2 Se4+ 3. Ke3 Sc5 4. dxc5 g5 5. c6 Lh6 6. cxb7 0-0 7. bxc8 g4+ 8. f4 gxf3ep+
Objective: record achievement of task. Promotion can be to any officer, but prefer to keep the "stem cell" to avoid arbitrary choice of non-standard material.
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Keywords: Unique Proof Game, Dummy Pawn (in diagram), Valladao Task, Golden Age (Dummy Pawn), Castling (sk), En passant
Genre: Retro
Computer test: HJ: with wSc8 C+ Stelvio 1.0
FEN: rnPq1rk1/p1pppp1p/7b/8/8/4Kp2/PPP1P1PP/RNBQ1BNR
Input: A.Buchanan, 2023-03-19
Last update: A.Buchanan, 2023-08-04 more...
Genre: Retro
Computer test: HJ: with wSc8 C+ Stelvio 1.0
FEN: rnPq1rk1/p1pppp1p/7b/8/8/4Kp2/PPP1P1PP/RNBQ1BNR
Input: A.Buchanan, 2023-03-19
Last update: A.Buchanan, 2023-08-04 more...
1. d4 Sc6 2. Kd2 Se5 3. dxe5 Sf6 4. exf6 g5 5. fxe7 Lh6 6. exd8 0-0 7. Ke3 g4+ 8. f4 gxf3ep+
Objective: record achievement of task. Promotion can be to either minor officer, but prefer to keep the "stem cell" to avoid arbitrary choice of non-standard material.
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Keywords: Unique Proof Game, Dummy Pawn (in diagram), Valladao Task, Golden Age (Dummy Pawn), Castling (sk), En passant
Genre: Retro
Computer test: HJ: with wSd8 C+ Stelvio 1.0
FEN: r1bP1rk1/pppp1p1p/7b/8/8/4Kp2/PPP1P1PP/RNBQ1BNR
Input: A.Buchanan, 2023-03-19
Last update: A.Buchanan, 2023-08-04 more...
Genre: Retro
Computer test: HJ: with wSd8 C+ Stelvio 1.0
FEN: r1bP1rk1/pppp1p1p/7b/8/8/4Kp2/PPP1P1PP/RNBQ1BNR
Input: A.Buchanan, 2023-03-19
Last update: A.Buchanan, 2023-08-04 more...
1. f4 e6 2. f5 Lc5 3. f6 Se7 4. fxe7 Lb6 5. exd8 c5 6. Kf2 0-0 7. Ke3 c4+ 8. d4 cxd3ep+
Objective: record achievement of task. Promotion can be to either minor officer, but prefer to keep the "stem cell" to avoid arbitrary choice of non-standard material.
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Keywords: Unique Proof Game, Dummy Pawn (in diagram), Valladao Task, Golden Age (Dummy Pawn), Castling (sk), En passant
Genre: Retro
Computer test: HJ: with wSd8 C+ Stelvio 1.0
FEN: rnbP1rk1/pp1p1ppp/1b2p3/8/8/3pK3/PPP1P1PP/RNBQ1BNR
Input: A.Buchanan, 2023-03-19
Last update: A.Buchanan, 2023-08-04 more...
Genre: Retro
Computer test: HJ: with wSd8 C+ Stelvio 1.0
FEN: rnbP1rk1/pp1p1ppp/1b2p3/8/8/3pK3/PPP1P1PP/RNBQ1BNR
Input: A.Buchanan, 2023-03-19
Last update: A.Buchanan, 2023-08-04 more...
1. f4 d5 2. f5 Ld7 3. f6 Lc6 4. fxe7 Sd7 5. exf8 Dg5 6. Kf2 0-0-0 7. Kf3 d4+ 8. e4 dxe3ep+
Objective: record achievement of task. Promotion can be to either minor officer, but prefer to keep the "stem cell" to avoid arbitrary choice of non-standard material.
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Keywords: Unique Proof Game, Dummy Pawn (in diagram), Valladao Task, Golden Age (Dummy Pawn), Castling (sg), En passant
Genre: Retro
Computer test: HJ: with wSf8, C+ Stelvio 1.0
FEN: 2kr1Pnr/pppn1ppp/2b5/6q1/8/4pK2/PPPP2PP/RNBQ1BNR
Input: A.Buchanan, 2023-03-19
Last update: A.Buchanan, 2023-08-04 more...
Genre: Retro
Computer test: HJ: with wSf8, C+ Stelvio 1.0
FEN: 2kr1Pnr/pppn1ppp/2b5/6q1/8/4pK2/PPPP2PP/RNBQ1BNR
Input: A.Buchanan, 2023-03-19
Last update: A.Buchanan, 2023-08-04 more...
1. cxd8=B+ Kd6 2. e8=B+ Ke6 3. Lc4+ Kxf6 4. Le7+ Kxg6 5. g8=B Txh3#
Improvement in move number and economy over P1379580.
Improvement in move number and economy over P1379580.
SCHRECKE: Here is a s#7 with 4 dummy pawns: QnRn1B1K/P1P1P1P1/k1N5/3p2p1/2PPB1P1/8/4p1pR/4Nbrr
1. axb8=B+! Kb6 2. Da7+ Kxc6 3. cxd8=B+ Kd6 4. e8=B+ Ke6 5. Lxd5+ Kf6 6. Le7+ Kg6 7. g8=B Txh2#
Who makes it better? (2023-06-07)
James Malcom: Wonderfully done. I had an illegal scheme for four I never realized, but now it is done: 1RrRq1BK/pP1P1PP1/Pk2N1N1/p3p1p1/p2PP1P1/3Q3p/6pr/6Bb
I see no improvements to yours, yet. (2023-06-07)
comment
1. axb8=B+! Kb6 2. Da7+ Kxc6 3. cxd8=B+ Kd6 4. e8=B+ Ke6 5. Lxd5+ Kf6 6. Le7+ Kg6 7. g8=B Txh2#
Who makes it better? (2023-06-07)
James Malcom: Wonderfully done. I had an illegal scheme for four I never realized, but now it is done: 1RrRq1BK/pP1P1PP1/Pk2N1N1/p3p1p1/p2PP1P1/3Q3p/6pr/6Bb
I see no improvements to yours, yet. (2023-06-07)
comment
Keywords: Dummy Pawn (x3), Golden Age (Dummy Pawn), Construction record
Genre: s#
Computer test: Popeye 4.69
FEN: 2Rn1B1K/2P1P1P1/P1k2NN1/6p1/6P1/7R/6pr/5BQb
Input: James Malcom, 2023-06-06
Last update: A.Buchanan, 2023-08-04 more...
Genre: s#
Computer test: Popeye 4.69
FEN: 2Rn1B1K/2P1P1P1/P1k2NN1/6p1/6P1/7R/6pr/5BQb
Input: James Malcom, 2023-06-06
Last update: A.Buchanan, 2023-08-04 more...
1. axb8=B+! Kb6 2. Da7+ Kxc6 3. cxd8=B+ Kd6 4. e8=B+ Ke6 5. Lxd5+ Kf6 6. Le7+ Kg6 7. g8=B Txh2#
Commented on P1410177
Commented on P1410177
SCHRECKE: Dear James, the authors should be Malcolm/Schreckenbach. (2023-07-11)
James Malcom: Done. (2023-07-12)
comment
James Malcom: Done. (2023-07-12)
comment
Keywords: Dummy Pawn (x4), Construction record
Genre: s#
Computer test: Popeye 4.69
FEN: QnRn1B1K/P1P1P1P1/k1N5/3p2p1/2PPB1P1/8/4p1pR/4Nbrr
Input: James Malcom, 2023-07-11
Last update: James Malcom, 2023-07-12 more...
Genre: s#
Computer test: Popeye 4.69
FEN: QnRn1B1K/P1P1P1P1/k1N5/3p2p1/2PPB1P1/8/4p1pR/4Nbrr
Input: James Malcom, 2023-07-11
Last update: James Malcom, 2023-07-12 more...
1. Tg8! (Zugzwang)
1. ... Txg8 2. hxg8
1. ... Tf8 2. gxf8
1. ... Td8 2. cxd8
1. ... Txg8 2. hxg8
1. ... Tf8 2. gxf8
1. ... Td8 2. cxd8
SCHRECKE: Have a look at this: R4q1k/pPP3R1/rp3PKn/p5PQ/P7/8/8/8
s#2, 1. f7! - 6(!) dummy promotions (2023-07-28)
SCHRECKE: In my work a black rook on f8 is better! (2023-07-28)
A.Buchanan: Yes this is a great improvement. I can't see how one might get a 7th (2023-07-28)
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s#2, 1. f7! - 6(!) dummy promotions (2023-07-28)
SCHRECKE: In my work a black rook on f8 is better! (2023-07-28)
A.Buchanan: Yes this is a great improvement. I can't see how one might get a 7th (2023-07-28)
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Keywords: Dummy Pawn, Golden Age (Dummy Pawn), Superseded by (P1411367)
Genre: s#
Computer test: C+, popeye 4.87
FEN: 2b1r2R/1pPpk1PP/1P3pB1/4pK2/4N3/8/8/8
Input: Miguel Ambrona, 2023-07-26
Last update: A.Buchanan, 2023-07-29 more...
Genre: s#
Computer test: C+, popeye 4.87
FEN: 2b1r2R/1pPpk1PP/1P3pB1/4pK2/4N3/8/8/8
Input: Miguel Ambrona, 2023-07-26
Last update: A.Buchanan, 2023-07-29 more...
23 - P1411297
James Malcom
Andrew Buchanan
OP020 The Hopper Magazine I02 25/6/2022
(9+9)
r#6 Dummy Pawn Rule
James Malcom
Andrew Buchanan
OP020 The Hopper Magazine I02 25/6/2022
(9+9)
r#6 Dummy Pawn Rule
SCHRECKE: C+, popeye 4.87
1. Da6! droht 2. f4 h1=D,L#
1. ... h1=B! 2. bxa8=B! g4!
3. f4 droht 4. Lxd2 droht 5. Le1 fxe1D,T#
3. ... f1=B! 4. e8=B! d1=B!
5. Le1 Sc2 6. Lb1 Te3# (2023-09-09)
comment
1. Da6! droht 2. f4 h1=D,L#
1. ... h1=B! 2. bxa8=B! g4!
3. f4 droht 4. Lxd2 droht 5. Le1 fxe1D,T#
3. ... f1=B! 4. e8=B! d1=B!
5. Le1 Sc2 6. Lb1 Te3# (2023-09-09)
comment
Keywords: Dummy Pawn, Golden Age (Dummy Pawn)
Genre: r#, Fairies
FEN: n7/1P2P3/7Q/Br4p1/2kPK3/1r3PP1/B2p1p1p/n7
Input: Miguel Ambrona, 2023-07-27
Last update: James Malcom, 2023-09-09 more...
Genre: r#, Fairies
FEN: n7/1P2P3/7Q/Br4p1/2kPK3/1r3PP1/B2p1p1p/n7
Input: Miguel Ambrona, 2023-07-27
Last update: James Malcom, 2023-09-09 more...
SCHRECKE: C+, popeye 4.87
1. f7! (Zugzwang)
1. ... Txa8 2. bxa8
1. ... Tb8 2. cxb8
1. ... Tc8 2. bxc8
1. ... Td8 2. cxd8
1. ... Te8 2. fxe8
1. ... Tg8 2. fxg8 (2023-07-29)
SCHRECKE: Hi Andrew, thanks for the diagram. (2023-07-29)
comment
1. f7! (Zugzwang)
1. ... Txa8 2. bxa8
1. ... Tb8 2. cxb8
1. ... Tc8 2. bxc8
1. ... Td8 2. cxd8
1. ... Te8 2. fxe8
1. ... Tg8 2. fxg8 (2023-07-29)
SCHRECKE: Hi Andrew, thanks for the diagram. (2023-07-29)
comment
Keywords: Dummy Pawn, Golden Age (Dummy Pawn)
Genre: s#
FEN: R4r1k/pPP3R1/rp3PKn/p5PQ/P7/8/8/8
Input: A.Buchanan, 2023-07-29
Last update: A.Buchanan, 2023-07-29 more...
Genre: s#
FEN: R4r1k/pPP3R1/rp3PKn/p5PQ/P7/8/8/8
Input: A.Buchanan, 2023-07-29
Last update: A.Buchanan, 2023-07-29 more...
1. b4 h5 2. b5 h4 3. b6 h3 4. b7 h2 5. b8=B Lxg7#
Keywords: Dummy Pawn, Golden Age (Dummy Pawn), Economy record (dummy pawn excelsior), Excelsior, Non-standard material (TL)
Genre: s#
Computer test: C+ Popeye v4.87
FEN: 2R1R2b/3kp1R1/7p/2P5/8/8/BP6/KB5p
Input: A.Buchanan, 2023-08-08
Last update: A.Buchanan, 2023-12-18 more...
Genre: s#
Computer test: C+ Popeye v4.87
FEN: 2R1R2b/3kp1R1/7p/2P5/8/8/BP6/KB5p
Input: A.Buchanan, 2023-08-08
Last update: A.Buchanan, 2023-12-18 more...
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https://pdb.dieschwalbe.de/search.jsp?expression=COMMENTDATE%3E%3D20220125+AND+K%3D%27Dummybauer%27
The problems of this query have been registered by the following contributors:
Gerd Wilts (1)James Malcom (9)
Mario Richter (1)
A.Buchanan (12)
Miguel Ambrona (2)
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: Hurray I've got the animation working! I agree with Henrik's stipulation. There is a dummy pawn on f8, but not by the Dummy Pawn rule. Instead it's the joke that does it. If Dummy Rule applied, the move would be full length! :) (2022-02-09)
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