22 problem(s) found in 2760 milliseconds (displaying 22 problem(s)). [COMMENTDATE>=20200919 AND NOT K='Hilfsrückzüger' AND K='Umwandlung' AND S='Europe Echecs'] [download as LaTeX]
R: 1. Kh3xBg3 hxg3ep+ 2. g2-g4 Ke6xBd6 3. exd6ep+ d7-d5 4. Sc4-b6, dann 1. Sd6#
Keywords: En passant, Promotion, Defensive Retractor, Type Høeg
Genre: Retro
FEN: 2b4q/1p2p3/pNPk4/8/8/1B2R1K1/1P2PP1P/8
Reprints: feenschach 42 04-07/1978
345 Europe Echecs 241 01/1979
(5) Die Schwalbe 163 02/1997
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-04-07 more...
Genre: Retro
FEN: 2b4q/1p2p3/pNPk4/8/8/1B2R1K1/1P2PP1P/8
Reprints: feenschach 42 04-07/1978
345 Europe Echecs 241 01/1979
(5) Die Schwalbe 163 02/1997
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-04-07 more...
hans: R: -1 Kh7-g8 Tf8-f7
(captures w fxSexSdxDcxTb8=L and KxLf8 s hxg cxSb6 and Lc1 on homesquare (2010-06-21)
A.Buchanan: Couldn't it equally be R: 1. Th4-h8 h6xBg5 etc? Not sure what this problem is driving at, except for what would later be termed Donati theme. (2021-10-24)
Henrik Juel: Yes, it seems that there are several ways to skin this cat
The problem may be the first to show the Donati theme (2021-10-24)
Mario Richter: The stipulation did not ask for "last moves", so it seems sufficient to have the "main events" unique, and this is the case here:
White captured black Bishop f8 on its home square, White pawn f2 captured 4 times to promote to a Bishop (the original wBishop c1 was captured by a black officer), so among the capture objects was bRa8, so the promotion took place on b8. White pawn g2 never left its home file, so it was captured by black pawn h7, leaving only c7xSb6 to explain the b-double pawn.
Btw., in what sense is this Problem "C+"? (2021-10-24)
A.Buchanan: Hi Mario, this is not unsound, just loose. wDh2 prevents e.g. R: 1. Lg3-g1 Kb8-a8, so there seemed at least some interest in the last move. But 3 legal possibilities remain. Is there a typo in the diagram? With wKe8 instead of g8, I think the solution is R: 1. Th4-h8 h6xBg5 2. Lg3-b8 Kb8-a8 3. Tf4-a4+ which is a lot more satisfactory.
I've no idea why the problem has been marked as C+ (2021-10-25)
Mario Richter: I completely agree with Andrew, that e8 is a much better place for the wK (and only this way wQh2 makes any sense), so I'm supposing a typo.
Apropos, the third white retraction shoulkd read 3. Tf4-h4+ ... (2021-10-26)
A.Buchanan: Thanks Mario for correcting my spatio-algebraic dyslexia again :) We are still not using the fact that the White pieces are clustered tightly around wD. Any thoughts? Is there an (online) archive of this magazine? (2021-10-26)
more ...
comment
(captures w fxSexSdxDcxTb8=L and KxLf8 s hxg cxSb6 and Lc1 on homesquare (2010-06-21)
A.Buchanan: Couldn't it equally be R: 1. Th4-h8 h6xBg5 etc? Not sure what this problem is driving at, except for what would later be termed Donati theme. (2021-10-24)
Henrik Juel: Yes, it seems that there are several ways to skin this cat
The problem may be the first to show the Donati theme (2021-10-24)
Mario Richter: The stipulation did not ask for "last moves", so it seems sufficient to have the "main events" unique, and this is the case here:
White captured black Bishop f8 on its home square, White pawn f2 captured 4 times to promote to a Bishop (the original wBishop c1 was captured by a black officer), so among the capture objects was bRa8, so the promotion took place on b8. White pawn g2 never left its home file, so it was captured by black pawn h7, leaving only c7xSb6 to explain the b-double pawn.
Btw., in what sense is this Problem "C+"? (2021-10-24)
A.Buchanan: Hi Mario, this is not unsound, just loose. wDh2 prevents e.g. R: 1. Lg3-g1 Kb8-a8, so there seemed at least some interest in the last move. But 3 legal possibilities remain. Is there a typo in the diagram? With wKe8 instead of g8, I think the solution is R: 1. Th4-h8 h6xBg5 2. Lg3-b8 Kb8-a8 3. Tf4-a4+ which is a lot more satisfactory.
I've no idea why the problem has been marked as C+ (2021-10-25)
Mario Richter: I completely agree with Andrew, that e8 is a much better place for the wK (and only this way wQh2 makes any sense), so I'm supposing a typo.
Apropos, the third white retraction shoulkd read 3. Tf4-h4+ ... (2021-10-26)
A.Buchanan: Thanks Mario for correcting my spatio-algebraic dyslexia again :) We are still not using the fact that the White pieces are clustered tightly around wD. Any thoughts? Is there an (online) archive of this magazine? (2021-10-26)
more ...
comment
Keywords: Promotion (L), Donati Theme (L), Obvious promotion (L)
Genre: Retro
FEN: kBb3KR/pp1pprp1/1p3p2/6p1/8/7P/PPPPP1BQ/6NR
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2021-10-26 more...
Genre: Retro
FEN: kBb3KR/pp1pprp1/1p3p2/6p1/8/7P/PPPPP1BQ/6NR
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2021-10-26 more...
1. bxa5 Sb6 2. axb4 Ta8#
Henrik Juel: analysis
Black captured a3xb2 (not a7xb6, as the SW corner then cannot be released)
The missing white man is [Pe2], which must have promoted on b8
Now the white captures can be seen: axb, exdxcxb, and [Lf8] on f8
The only free white officer is Dd8, so the retroplay must include unpromotion of it on b8
It is impossible to shield Ke8 from check by Db8, so Ke8 has moved and Black may not castle (2022-04-27)
Henrik Juel: solution
1.bxa5 Sb6 2.axb4 Ta8#
not 1.0-0? Lxb6 2.Txa8 Txa8
HC+ Popeye 4.61 (2022-04-27)
Henrik Juel: Andrew, I should have been more precise in recommending your suggestion to introduce the new keyword Organ Pipes
I was talking about the standard meaning of Organ Pipes, which dates back to Sam Loyd, 1859: black LTTL in a problem where each L interferes with each T and vice versa, forming four Grimshaws
You have probably used a pattern search to find all occurrences of black or white LTTL, and you have neglected the interferences
This problem has LTTL in the wrong color, and there are no interferences (2022-04-27)
James Malcom: I agree with Henrik, although White organ pipes still exist, few and far. (2022-04-28)
James Malcom: Until Andrew bumbles back, I've updated the English definition to "A problem *utilizing* the pattern bishop, rook, rook, bishop in a straight line to create multiple Grimshaws." This specifies the purpose and formation of the Organ Pipes. (2022-04-28)
Henrik Juel: Thanks, James (2022-04-28)
A.Buchanan: Hi Guys. I wondered about other uses of organ pipes. In a first pass population of the 500-odd records with the current PDB interface, there’s not much time for thinking. I have multiple tabs open to eliminate the wait time associated with PDB refresh. One could go back and eliminate those which are not grimshaws. Alternatively (and this would be my preference) accept that this is a visual pattern which may occur in non-Grimshaw context. Then use the keyword Grimshaw(4x) to indicate when it’s really Grimshaw. I think it can also occur with white pattern, as a problem by Pal Benko shows. So I blitzed through the d# records, if someone wants to complete the rest that’s good. I think the existence of a few false transient positives is an acceptable price even if we take the narrow definition of Organ Pipes. (2022-04-28)
A.Buchanan: By the way, these days Deepl is good enough to give us decent translation to Feench & German and as a matter of policy whenever I make a change to a definition I try to align the other two. Other users who do not maintain the glossary are encouraged to propose definitions where there is a gap (E.g. Grimshaw). There are a lot of undefined terms, many very recent. (2022-04-28)
A.Buchanan: Hi Henrik feel free to respond to my response to your message, say thanks for the tags I have added, or add tags yourself to complete the work. The ones I’ve added were mostly the d# and it was a deliberate decision to blast through as a first pass and just add them for now anyway, not “neglected”. Now, I really don’t feel like continuing (2022-04-28)
Henrik Juel: Andrew, I believe that most PDB users appreciate your contributions to the site
I certainly do, so please continue your good work (2022-04-28)
comment
Black captured a3xb2 (not a7xb6, as the SW corner then cannot be released)
The missing white man is [Pe2], which must have promoted on b8
Now the white captures can be seen: axb, exdxcxb, and [Lf8] on f8
The only free white officer is Dd8, so the retroplay must include unpromotion of it on b8
It is impossible to shield Ke8 from check by Db8, so Ke8 has moved and Black may not castle (2022-04-27)
Henrik Juel: solution
1.bxa5 Sb6 2.axb4 Ta8#
not 1.0-0? Lxb6 2.Txa8 Txa8
HC+ Popeye 4.61 (2022-04-27)
Henrik Juel: Andrew, I should have been more precise in recommending your suggestion to introduce the new keyword Organ Pipes
I was talking about the standard meaning of Organ Pipes, which dates back to Sam Loyd, 1859: black LTTL in a problem where each L interferes with each T and vice versa, forming four Grimshaws
You have probably used a pattern search to find all occurrences of black or white LTTL, and you have neglected the interferences
This problem has LTTL in the wrong color, and there are no interferences (2022-04-27)
James Malcom: I agree with Henrik, although White organ pipes still exist, few and far. (2022-04-28)
James Malcom: Until Andrew bumbles back, I've updated the English definition to "A problem *utilizing* the pattern bishop, rook, rook, bishop in a straight line to create multiple Grimshaws." This specifies the purpose and formation of the Organ Pipes. (2022-04-28)
Henrik Juel: Thanks, James (2022-04-28)
A.Buchanan: Hi Guys. I wondered about other uses of organ pipes. In a first pass population of the 500-odd records with the current PDB interface, there’s not much time for thinking. I have multiple tabs open to eliminate the wait time associated with PDB refresh. One could go back and eliminate those which are not grimshaws. Alternatively (and this would be my preference) accept that this is a visual pattern which may occur in non-Grimshaw context. Then use the keyword Grimshaw(4x) to indicate when it’s really Grimshaw. I think it can also occur with white pattern, as a problem by Pal Benko shows. So I blitzed through the d# records, if someone wants to complete the rest that’s good. I think the existence of a few false transient positives is an acceptable price even if we take the narrow definition of Organ Pipes. (2022-04-28)
A.Buchanan: By the way, these days Deepl is good enough to give us decent translation to Feench & German and as a matter of policy whenever I make a change to a definition I try to align the other two. Other users who do not maintain the glossary are encouraged to propose definitions where there is a gap (E.g. Grimshaw). There are a lot of undefined terms, many very recent. (2022-04-28)
A.Buchanan: Hi Henrik feel free to respond to my response to your message, say thanks for the tags I have added, or add tags yourself to complete the work. The ones I’ve added were mostly the d# and it was a deliberate decision to blast through as a first pass and just add them for now anyway, not “neglected”. Now, I really don’t feel like continuing (2022-04-28)
Henrik Juel: Andrew, I believe that most PDB users appreciate your contributions to the site
I certainly do, so please continue your good work (2022-04-28)
comment
1. e3 d5 2. Lc4 d4 3. Se2 d3 4. 0-0 dxc2 5. d4 Kd7 6. d5 Kd6 7. Dd4 Sd7 8. Ld2 c1=L 9. Lb4+ c5 10. dxc6ep+
Keywords: Unique Proof Game, En passant, Non-standard material (l), Castling (wk), Promotion (l), Valladao Task (sww)
Genre: Retro
Computer test: Ergänzung Stelvio 1.2 C+: Keine Lösung: BP 8.5, 9.0. 10. dxc6ep++ Doppelschach.
FEN: r1bq1bnr/pp1npppp/2Pk4/8/1BBQ4/4P3/PP2NPPP/RNb2RK1
Reprints: 92 Shortest Proof Games 11/1991
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-05-25 more...
Genre: Retro
Computer test: Ergänzung Stelvio 1.2 C+: Keine Lösung: BP 8.5, 9.0. 10. dxc6ep++ Doppelschach.
FEN: r1bq1bnr/pp1npppp/2Pk4/8/1BBQ4/4P3/PP2NPPP/RNb2RK1
Reprints: 92 Shortest Proof Games 11/1991
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-05-25 more...
1. Sf3 a5 2. Sd4 a4 3. Sb3 axb3 4. a3 Ta4 5. Ta2 bxa2 6. Tg1 axb1=S 7. Th1 Sc3 8. Tg1 Sb5 9. Th1 Sa7 10. Tg1 b5 11. Th1 Lb7 12. Tg1 Ld5 13. Th1 La2 14. b3 h5 15. Lb2 h4 16. Lf6 h3 17. Lh4 Sf6 18. Da1 Sh5 19. Df6 Tf4 20. Da6 e6 21. Kd1 Dg5 22. Kc1 Dg3 23. hxg3 Lc5 24. gxf4 Le3 25. Lg3 Ke7 26. Lh2 Kf6 27. g3 Kf5 28. Lg2 Kg4 29. La8 Sbc6 30. Kb2 Tb8 31. Ta1 Lb1 32. Lg1 h2 33. Kc3 Kh3 34. Kd3 Kg2 35. Ke4 Kf1 36. Kf3 Ke1 37. Kg4 Kd1 38. Kg5 f6+ 39. Kg6 Kc1 40. Kf7 Sd8+ 41. Ke8 Kb2 42. Ta2+
Sally: Eine eindeutige BwP., die lange Zeit den Längenreord hielt und, wenn auch mit langer Verzögerung, wesentlich zum Boom dieser Gattung in den letzten 15 Jahren beigetragen hat. Im-
mer noch eine faszinierende Aufgabe. Nr. KF-13 Schwalbe Okt. 2005. (2011-12-05)
Moldenhauer: Ergänzung: Keine Lösung: BP 40.5, BP 41.0. (2023-05-20)
comment
mer noch eine faszinierende Aufgabe. Nr. KF-13 Schwalbe Okt. 2005. (2011-12-05)
Moldenhauer: Ergänzung: Keine Lösung: BP 40.5, BP 41.0. (2023-05-20)
comment
Keywords: Unique Proof Game, Move Length Record, Non-standard material, Promotion
Genre: Retro
Computer test: Stelvio 1.17, in 3h.
FEN: Br1nK3/n1pp2p1/Q3pp2/1p5n/5P2/PP2b1P1/RkPPPP1p/1b4B1
Reprints: 1366 FIDE Album 1945-1955 1964
301 Europe Echecs 200 07/1975
(VIII) feenschach 28 05-07/1975
feenschach 38 04-06/1977
78 Shortest Proof Games 11/1991
17a 64 Proof Games 2012
Input: Gerd Wilts, 1995-06-03
Last update: Reto, 2023-04-14 more...
Genre: Retro
Computer test: Stelvio 1.17, in 3h.
FEN: Br1nK3/n1pp2p1/Q3pp2/1p5n/5P2/PP2b1P1/RkPPPP1p/1b4B1
Reprints: 1366 FIDE Album 1945-1955 1964
301 Europe Echecs 200 07/1975
(VIII) feenschach 28 05-07/1975
feenschach 38 04-06/1977
78 Shortest Proof Games 11/1991
17a 64 Proof Games 2012
Input: Gerd Wilts, 1995-06-03
Last update: Reto, 2023-04-14 more...
6 - P0001550
Michel Caillaud
421 Europe Echecs 295 07/1983
A. Hazebrouck gewidmet
1. Preis
(13+12) C+
BP in 35.5
Michel Caillaud
421 Europe Echecs 295 07/1983
A. Hazebrouck gewidmet
1. Preis
(13+12) C+
BP in 35.5
1. h4 c5 2. h5 c4 3. Th4 c3 4. Tc4 b5 5. g4 b4 6. Lg2 b3 7. Lc6 bxa2 8. b4 a5 9. b5 a4 10. b6 a3 11. La4 Sc6 12. b7 d5 13. b8=D d4 14. Dd6 d3 15. Dg6 dxc2 16. d3 fxg6 17. Ld2 c1=L 18. Db3 c2 19. La5 Lh6 20. Sd2 c1=L 21. Sf1 Lcg5 22. f4 Kf7 23. 0-0-0 a1=L 24. fxg5 a2 25. gxh6 Kf6 26. Sh2 Kg5 27. Tf1 Lf6 28. Tff4 a1=L 29. Kb1 Lae5 30. d4 Lb7 31. dxe5 Dd2 32. exf6 Te8 33. f7 Sf6 34. Dd3 Sd7 35. Ld1 Sdb8 36. Sgf3+
5 Frolkin-Ceriani-Umwandlungen: 4 schwarze Läufer und 1 weiße Dame! Eine der bahnbrechenden frühen KBPs.
5 Frolkin-Ceriani-Umwandlungen: 4 schwarze Läufer und 1 weiße Dame! Eine der bahnbrechenden frühen KBPs.
Silvio Baier: Der wesentliche thematische Inhalt ist bereits nach 31,5 Zügen erreicht. Bis dahin ist es C+ (Euclide 0.98). (2010-08-04)
James Malcom: Is this fully C+ then? (2021-01-27)
Henrik Juel: No, only the first 31.5 moves are tested OK (2021-01-27)
James Malcom: No Henrik, as in is the entire problem testable. (2021-01-27)
Henrik Juel: I guess that testing the entire problem would take an unreasonably long time (2021-04-06)
A.Buchanan: It might be possible these days: the motivation for stopping at 31.5 is that the promotion theme had been demonstrated by then. But there’s still e.g. bSb8 as random impostor (2021-04-07)
Moldenhauer: Computerprüfung: C+ Stelvio 1.11 50:24:34 Stunden.(hh:mm:ss)
Keine Lösung: BP 34.5, BP 35.0. (2023-05-08)
Henrik Juel: Thanks for your patience, Moldenhauer; more than two days... (2023-05-08)
comment
James Malcom: Is this fully C+ then? (2021-01-27)
Henrik Juel: No, only the first 31.5 moves are tested OK (2021-01-27)
James Malcom: No Henrik, as in is the entire problem testable. (2021-01-27)
Henrik Juel: I guess that testing the entire problem would take an unreasonably long time (2021-04-06)
A.Buchanan: It might be possible these days: the motivation for stopping at 31.5 is that the promotion theme had been demonstrated by then. But there’s still e.g. bSb8 as random impostor (2021-04-07)
Moldenhauer: Computerprüfung: C+ Stelvio 1.11 50:24:34 Stunden.(hh:mm:ss)
Keine Lösung: BP 34.5, BP 35.0. (2023-05-08)
Henrik Juel: Thanks for your patience, Moldenhauer; more than two days... (2023-05-08)
comment
Keywords: Ceriani-Frolkin Theme (llllD), Unique Proof Game, Castling, Promotion (llllD), Impostor (s)
Genre: Retro
Computer test: Computerprüfung: C+ Stelvio 1.11 50:24:34 Stunden.(hh:mm:ss) Keine Lösung: BP 34.5, BP 35.0.
FEN: 1n2rb1r/1b2pPpp/2n3pP/B5kP/2R2RP1/3Q1N2/3qP2N/1K1B4
Reprints: 25 Shortest Proof Games 11/1991
(1) diagrammes 103 10-12/1992
(A) Quartz 22 10-12/2002
(8-a) Die Schwalbe 250A 08/2011
Input: Gerd Wilts, 1995-06-03
Last update: James Malcom, 2021-04-07 more...
Genre: Retro
Computer test: Computerprüfung: C+ Stelvio 1.11 50:24:34 Stunden.(hh:mm:ss) Keine Lösung: BP 34.5, BP 35.0.
FEN: 1n2rb1r/1b2pPpp/2n3pP/B5kP/2R2RP1/3Q1N2/3qP2N/1K1B4
Reprints: 25 Shortest Proof Games 11/1991
(1) diagrammes 103 10-12/1992
(A) Quartz 22 10-12/2002
(8-a) Die Schwalbe 250A 08/2011
Input: Gerd Wilts, 1995-06-03
Last update: James Malcom, 2021-04-07 more...
1. ... bxa6ep! 2. Txe2 axb7 3. Td2 b8=D 4. De2 Db1#
1. Dc6? bxc6 2. Ld7 cxd7 3. Ke1,Kxe2 d8=D 4. Kf1 Dd1# too slow
R: 1. a7-a5 e3xLf4 2. Ld6-f4 d2xTe3 3. Ta3-e3 b4-b5 4. Ta6-a3 b3-b4 5. Tc6xBa6 a5-a6 6. Tc8-c6 a4-a5 7. Tg8-c8 a3-a4 8. Lf8-d6 a2-a3 9. e7xDf6,e7xTf6
The forward play gives shortest h# in 3.5 moves, *if* e.p. is on. Otherwise the shortest is a mildly dualized 4.0 moves. So our mission is clear: assuming that Black moved last, what was that move? The position looks very open - how can one ever know? There is a knot in the south-east corner, which will only be resolved by wQ/R visiting g1.
White pawns have captured dxexf & hxg, accounting for BSP. So wPa was waylaid while wPc promoted to B. Black pawns captured dxexfxgxh, exf as well as wBf1 captured at home and wPa. That's 7 units, but bPc must also have captured to allow wPc to promote (to B on c8). So all captured units are accounted for. bPc promoted (bPh7 came from h6, so is bPd). We can't undo any of the Black pawn captures now, but we can undo d2xe3xf4, to release 2 Black units.
We can unpromote bPc, but we can't undo its capture to release a White unit, until wBh3 has unpromoted. The only White unit we can get now is from e7xf6. So this means that the two Black units we can release must be B & R, so they can retreat to f8 & g8 respectively. The timing is very tight, and there is only one way to do it. The black rook must visit a6 to unwaylay wPa, which gives White 5 more tempi, just enough.
bPc promoted on b1 to R, so we would need to undo the cage to get that. Therefore all we can do is send wQg1, then Rf1-f2 f2-f3 etc. bPa must retract immediately tp a7, so that wPa when unwaylaid can make fully 4 unmoves. Black officers are arranged to give unique retro & forward play (although with minor dual for the try) with Sh8 not just retro dressing but ensuring unique retraction Tg8-c8 not Th8-c8.
1. Dc6? bxc6 2. Ld7 cxd7 3. Ke1,Kxe2 d8=D 4. Kf1 Dd1# too slow
R: 1. a7-a5 e3xLf4 2. Ld6-f4 d2xTe3 3. Ta3-e3 b4-b5 4. Ta6-a3 b3-b4 5. Tc6xBa6 a5-a6 6. Tc8-c6 a4-a5 7. Tg8-c8 a3-a4 8. Lf8-d6 a2-a3 9. e7xDf6,e7xTf6
The forward play gives shortest h# in 3.5 moves, *if* e.p. is on. Otherwise the shortest is a mildly dualized 4.0 moves. So our mission is clear: assuming that Black moved last, what was that move? The position looks very open - how can one ever know? There is a knot in the south-east corner, which will only be resolved by wQ/R visiting g1.
White pawns have captured dxexf & hxg, accounting for BSP. So wPa was waylaid while wPc promoted to B. Black pawns captured dxexfxgxh, exf as well as wBf1 captured at home and wPa. That's 7 units, but bPc must also have captured to allow wPc to promote (to B on c8). So all captured units are accounted for. bPc promoted (bPh7 came from h6, so is bPd). We can't undo any of the Black pawn captures now, but we can undo d2xe3xf4, to release 2 Black units.
We can unpromote bPc, but we can't undo its capture to release a White unit, until wBh3 has unpromoted. The only White unit we can get now is from e7xf6. So this means that the two Black units we can release must be B & R, so they can retreat to f8 & g8 respectively. The timing is very tight, and there is only one way to do it. The black rook must visit a6 to unwaylay wPa, which gives White 5 more tempi, just enough.
bPc promoted on b1 to R, so we would need to undo the cage to get that. Therefore all we can do is send wQg1, then Rf1-f2 f2-f3 etc. bPa must retract immediately tp a7, so that wPa when unwaylaid can make fully 4 unmoves. Black officers are arranged to give unique retro & forward play (although with minor dual for the try) with Sh8 not just retro dressing but ensuring unique retraction Tg8-c8 not Th8-c8.
A.Buchanan: Another surprising motivation for e.p. I love Sh8. Sorry for W3 dual in the try play else the stipulation could be h#4*. I can’t fix it but it’s hard to improve on MC. Very enjoyable (2021-10-23)
A.Buchanan: Non-standard material is where the diagram contains for a player more than 1 queen or bishop of a hue or more than 2 rooks or knights. Obtrusive material is standard material, but there is some cheap reason why the unit must be promoted, most commonly that a bishop's home square remains blockaded by pawns. These categories are disjoint: no piece is ever both. Many problems in PDB do not apply this consistently, but the distinction goes back a long way in chess problem history, and is discussed by Morse.
Honestly, I dislike the word "obtrusive" whose negativity (while perhaps valid in forward problems) is inappropriate for retros. One distinguished composer objected to this tag being assigned to one of his problems. Nevertheless the concept has some interest. Renaming is a perilous business, but I am looking for suggestions... :) (2021-10-24)
A.Buchanan: Another distinction that comes to mind between "non-standard material" and "obtrusive promotion" is that normally in the former, one can't immediately point to which of the non-standard pieces was promoted: it's just that there's too many; while for the latter, one can usually point to a specific unit immediately.
"Obvious" is a candidate replacement for "obtrusive", but this might commit a cardinal sin of trying to nail down a perfectly useful and inherently vague term. Both "obvious" & "obtrusive" begin with "ob" which is helpful. What do you think? (2021-10-24)
Henrik Juel: I am curious about the award; why did this problem with good forward play and excellent retro-play only obtain a Commendation?
Maybe the judge did not like that Lh3 obviously is obtrusive...
. (2021-10-24)
A.Buchanan: Yes, and the lovely P0001117 with a similar obtrusion only received 12th Lob! But there may have been other factors. I do observe that "non-standard material" is arguably a worse defect than "obtrusive material", but the term doesn't cause offence because it's objective and non-judgemental. "obtrusive" is more subjective and inherently pejorative. To have such terms in the glossary is to put curators in an invidious position. I think the concept has its place, but I would like to replace it with something less scornful. I'm up for "obvious". It's an easy and reversible change: let's do it and see if mobs of protesters form outside the gate :) (2021-10-24)
A.Buchanan: Have changed "obtrusive material" to the non-pejorative "obvious promotion". It may still be regarded as a defect. As a placeholder, I have also changed the unclear German "mit Umwandlungfigur(en)" to "augenscheinlich Umwandlungfigur". A native German speaker I'm sure will propose a better term. (2021-10-26)
A.Buchanan: “offensichtlich” it is thanks Mario (2021-10-26)
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A.Buchanan: Non-standard material is where the diagram contains for a player more than 1 queen or bishop of a hue or more than 2 rooks or knights. Obtrusive material is standard material, but there is some cheap reason why the unit must be promoted, most commonly that a bishop's home square remains blockaded by pawns. These categories are disjoint: no piece is ever both. Many problems in PDB do not apply this consistently, but the distinction goes back a long way in chess problem history, and is discussed by Morse.
Honestly, I dislike the word "obtrusive" whose negativity (while perhaps valid in forward problems) is inappropriate for retros. One distinguished composer objected to this tag being assigned to one of his problems. Nevertheless the concept has some interest. Renaming is a perilous business, but I am looking for suggestions... :) (2021-10-24)
A.Buchanan: Another distinction that comes to mind between "non-standard material" and "obtrusive promotion" is that normally in the former, one can't immediately point to which of the non-standard pieces was promoted: it's just that there's too many; while for the latter, one can usually point to a specific unit immediately.
"Obvious" is a candidate replacement for "obtrusive", but this might commit a cardinal sin of trying to nail down a perfectly useful and inherently vague term. Both "obvious" & "obtrusive" begin with "ob" which is helpful. What do you think? (2021-10-24)
Henrik Juel: I am curious about the award; why did this problem with good forward play and excellent retro-play only obtain a Commendation?
Maybe the judge did not like that Lh3 obviously is obtrusive...
. (2021-10-24)
A.Buchanan: Yes, and the lovely P0001117 with a similar obtrusion only received 12th Lob! But there may have been other factors. I do observe that "non-standard material" is arguably a worse defect than "obtrusive material", but the term doesn't cause offence because it's objective and non-judgemental. "obtrusive" is more subjective and inherently pejorative. To have such terms in the glossary is to put curators in an invidious position. I think the concept has its place, but I would like to replace it with something less scornful. I'm up for "obvious". It's an easy and reversible change: let's do it and see if mobs of protesters form outside the gate :) (2021-10-24)
A.Buchanan: Have changed "obtrusive material" to the non-pejorative "obvious promotion". It may still be regarded as a defect. As a placeholder, I have also changed the unclear German "mit Umwandlungfigur(en)" to "augenscheinlich Umwandlungfigur". A native German speaker I'm sure will propose a better term. (2021-10-26)
A.Buchanan: “offensichtlich” it is thanks Mario (2021-10-26)
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Keywords: En passant, Last Moves?, Obvious promotion (L), En passant as key, Promotion (D)
Genre: h#, Retro
FEN: 7n/1p3pp1/4bp1p/pP6/4qPP1/5PrB/4PrPp/3k3K
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2021-10-24 more...
Genre: h#, Retro
FEN: 7n/1p3pp1/4bp1p/pP6/4qPP1/5PrB/4PrPp/3k3K
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2021-10-24 more...
1. f4 h5 2. f5 h4 3. f6 h3 4. fxe7 f5 5. d4 Kf7 6. e8=T Kg6 7. Te6+ Kh5 8. Ta6 bxa6 9. Dd2 Lb7 10. e4 Lc6 11. e5 La4 12. e6 Sc6 13. e7 Db8 14. e8=T Db3 15. Te5 Te8 16. d5 Te6 17. dxe6 Lb4 18. Ta5 Lc3 19. Lb5 f4 20. e7 f3 21. e8=T f2+ 22. Ke2 f1=S 23. Tb8 Sxh2 24. Tb6 cxb6 25. Sf3 bxa5 26. Se5 Sf3 27. Sg4 Sfd4+
Cook: 1. f4 h5 2. f5 h4 3. f6 h3 4. fxe7 f5 5. e4 Kf7 6. e8=T f4 7. Te6 f3 8. Ta6 bxa6 9. e5 Kg6 10. e6 Lb7 11. e7 Lc6 12. e8=T La4 13. Te5 Sc6 14. Ta5 Db8 15. d4 Db3 16. Lb5 f2 17. Ke2 f1=S 18. Sf3 Te8 19. Se5 Kh5 20. d5 Te6 21. dxe6 Sxh2 22. e7 Sf3 23. e8=T Lb4 24. Tb8 Lc3 25. Tb6 cxb6 26. Sg4 bxa5 27. Dd2 Sd4
Cook: 1. f4 h5 2. f5 h4 3. f6 h3 4. fxe7 f5 5. e4 Kf7 6. e8=T f4 7. Te6 f3 8. Ta6 bxa6 9. e5 Kg6 10. e6 Lb7 11. e7 Lc6 12. e8=T La4 13. Te5 Sc6 14. Ta5 Db8 15. d4 Db3 16. Lb5 f2 17. Ke2 f1=S 18. Sf3 Te8 19. Se5 Kh5 20. d5 Te6 21. dxe6 Sxh2 22. e7 Sf3 23. e8=T Lb4 24. Tb8 Lc3 25. Tb6 cxb6 26. Sg4 bxa5 27. Dd2 Sd4
Keywords: Ceriani-Frolkin Theme (TTT), Unique Proof Game, Non-standard material, Promotion (s)
Genre: Retro
Computer test: Computerprüfung: Cooked Stelvio 1.11 1 Sekunde. Keine Lösung: BP 26.0, BP 26.5.
FEN: 6nr/p2p2p1/p1n5/pB5k/b2n2N1/1qb4p/PPPQK1P1/RNB4R
Reprints: 21 Shortest Proof Games 11/1991
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-05-08 more...
Genre: Retro
Computer test: Computerprüfung: Cooked Stelvio 1.11 1 Sekunde. Keine Lösung: BP 26.0, BP 26.5.
FEN: 6nr/p2p2p1/p1n5/pB5k/b2n2N1/1qb4p/PPPQK1P1/RNB4R
Reprints: 21 Shortest Proof Games 11/1991
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-05-08 more...
1. b4 h5 2. Lb2 h4 3. Dc1 h3 4. Kd1 hxg2 5. h4 e5 6. h5 e4 7. h6 e3 8. h7 exf2 9. e4 f5 10. Se2 g1=L 11. Lg2 f1=L 12. e5 Lb6 13. d4 Lfc5 14. dxc5 f4 15. cxb6 f3 16. Df4 f2 17. Sc1 La6 18. Sd2 f1=L 19. Tb1 Lfb5 20. c4 Se7 21. cxb5 Tg8 22. hxg8=L g5 23. Lc4 d5 24. bxa6 Lf5 25. e6 Sc8 26. e7 Kf7 27. e8=L+ Kg8 28. Leb5 c6 29. Tf1 cxb5 30. Tf2 Sc6 31. Sf1 dxc4+ 32. Ld5+
Cook: 1. b4 e5 2. Lb2 e4 3. Dc1 e3 4. Kd1 exf2 5. g4 Ld6 6. g5 Lxh2 7. g6 Kf8 8. gxf7 g5 9. Lg2 f1=L 10. e4 Lb5 11. Se2 Lg1 12. Th4 h5 13. e5 Kg7 14. c4 Th6 15. cxb5 Ta6 16. Tc4 Lc5 17. d4 h4 18. e6 h3 19. e7 h2 20. e8=D d5 21. bxa6 Se7 22. Db5 c6 23. Sd2 cxb5 24. Sf1 h1=D 25. f8=T Dh6 26. Tf2 Db6 27. Df4 Lf5 28. Tb1 Kg8 29. dxc5 Sc8 30. cxb6 Sc6 31. Sc1 dxc4+ 32. Ld5+
Cook: 1. b4 e5 2. Lb2 e4 3. Dc1 e3 4. Kd1 exf2 5. g4 Ld6 6. g5 Lxh2 7. g6 Kf8 8. gxf7 g5 9. Lg2 f1=L 10. e4 Lb5 11. Se2 Lg1 12. Th4 h5 13. e5 Kg7 14. c4 Th6 15. cxb5 Ta6 16. Tc4 Lc5 17. d4 h4 18. e6 h3 19. e7 h2 20. e8=D d5 21. bxa6 Se7 22. Db5 c6 23. Sd2 cxb5 24. Sf1 h1=D 25. f8=T Dh6 26. Tf2 Db6 27. Df4 Lf5 28. Tb1 Kg8 29. dxc5 Sc8 30. cxb6 Sc6 31. Sc1 dxc4+ 32. Ld5+
Paulo Roque: obs: Cook: 26...D6b6 (2008-12-24)
paul: See P0001634 as correction. (2010-09-25)
Moldenhauer: Computerprüfung: Cooked Stelvio 1.6 in 31:54:04 Stunden. (hh:mm:ss).
1 Lösung mit 20 cooks. (2024-01-07)
comment
paul: See P0001634 as correction. (2010-09-25)
Moldenhauer: Computerprüfung: Cooked Stelvio 1.6 in 31:54:04 Stunden. (hh:mm:ss).
1 Lösung mit 20 cooks. (2024-01-07)
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Keywords: Ceriani-Frolkin Theme (lllLL), Unique Proof Game, Promotion (lllLL)
Genre: Retro
FEN: r1nq2k1/pp6/PPn5/1p1B1bp1/1Pp2Q2/8/PB3R2/1RNK1N2
Reprints: 26 Shortest Proof Games 11/1991
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2021-04-06 more...
Genre: Retro
FEN: r1nq2k1/pp6/PPn5/1p1B1bp1/1Pp2Q2/8/PB3R2/1RNK1N2
Reprints: 26 Shortest Proof Games 11/1991
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2021-04-06 more...
1. b4 c5 2. b5 Sc6 3. bxc6 b5 4. c7 La6 5. c8=L d6 6. Lf5 Tc8 7. d4 Tc6 8. d5 Db8 9. dxc6 e6 10. c7 Le7 11. c8=S Ld8 12. Se7 Lb6 13. Sg6 hxg6 14. h4 Ke7 15. h5 Kf6 16. h6 Se7 17. h7 Te8 18. h8=T gxf5 19. Th4 Sg6 20. Te4 fxe4
Cook: 1. b4 c5 2. b5 Sc6 3. bxc6 b5 4. d4 La6 5. d5 Tc8 6. d6 Tc7 7. dxc7 Db8 8. c8=L d6 9. Lf5 e6 10. h4 Ke7 11. h5 Kf6 12. c7 Le7 13. c8=S Ld8 14. Se7 Lb6 15. Sg6 Se7 16. h6 hxg6 17. h7 Te8 18. h8=T gxf5 19. Th4 Sg6 20. Te4 fxe4
Cook: 1. b4 c5 2. b5 Sc6 3. bxc6 b5 4. d4 La6 5. d5 Tc8 6. d6 Tc7 7. dxc7 Db8 8. c8=L d6 9. Lf5 e6 10. h4 Ke7 11. h5 Kf6 12. c7 Le7 13. c8=S Ld8 14. Se7 Lb6 15. Sg6 Se7 16. h6 hxg6 17. h7 Te8 18. h8=T gxf5 19. Th4 Sg6 20. Te4 fxe4
Henrik Juel: Dual: ... 4.d4 La6 5.d5 Tc8 6.d6 Tc7 7.dxc7 Db8 8.c8L d6 9.Lf5 ... (2004-02-12)
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Keywords: Ceriani-Frolkin Theme (TLS), Unique Proof Game, Homebase (W), Promotion
Genre: Retro
Computer test: Ergänzung Stelvio 1.2. Keine Lösung BP 19.0, BP 19.5.
FEN: 1q2r3/p4pp1/bb1ppkn1/1pp5/4p3/8/P1P1PPP1/RNBQKBNR
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-05-21 more...
Genre: Retro
Computer test: Ergänzung Stelvio 1.2. Keine Lösung BP 19.0, BP 19.5.
FEN: 1q2r3/p4pp1/bb1ppkn1/1pp5/4p3/8/P1P1PPP1/RNBQKBNR
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-05-21 more...
1. Lf1 2. Kh3 3. Kh4 4. Lh3 5. fxg3ep 6. Kh5 7. Kg6 8. Kf7 9. Ke8 10. 0-0-0 11. Td7 a8=D#
The cluster of tries: Kh2-g1-f1-e1-d2-...-e8 0-0-0 Td7 is 12 moves: just too long.
In the diagram, e.p. is not permitted because last move might be g3-g4. So first shift sK to h4. Following the e.p., check that wK does now have prior move: Kf4-f3. Now sK scampers to e8 where through consequent forgetfulness it recovers castling rights.
The cluster of tries: Kh2-g1-f1-e1-d2-...-e8 0-0-0 Td7 is 12 moves: just too long.
In the diagram, e.p. is not permitted because last move might be g3-g4. So first shift sK to h4. Following the e.p., check that wK does now have prior move: Kf4-f3. Now sK scampers to e8 where through consequent forgetfulness it recovers castling rights.
Keywords: En passant, Castling (sg), Seriesmover, Consequent, Valladao Task, Promotion in the mating move (D), Switchback (l), Promotion (D), Königswanderung
Genre: Retro, Fairies
FEN: r7/P1p5/pp6/5pp1/5pP1/5K1b/4rp1k/8
Input: Gerd Wilts, 1995-06-03
Last update: James Malcom, 2021-09-14 more...
Genre: Retro, Fairies
FEN: r7/P1p5/pp6/5pp1/5pP1/5K1b/4rp1k/8
Input: Gerd Wilts, 1995-06-03
Last update: James Malcom, 2021-09-14 more...
12 - P0001629
Andrey Frolkin
498 Europe Echecs 355/356 07-08/1988
2. ehrende Erwähnung
(14+14) C+
BP in 26,5
Andrey Frolkin
498 Europe Echecs 355/356 07-08/1988
2. ehrende Erwähnung
(14+14) C+
BP in 26,5
1. Sc3 c5 2. Sd5 c4 3. Sxe7 c3 4. Sg6 hxg6 5. Sf3 Th5 6. Sd4 Ta5 7. Sb5 f5 8. Sa3 Df6 9. Sb1 La3 10. Tg1 d6 11. Th1 Ld7 12. Tg1 La4 13. Th1 Kd7 14. Tg1 Kc6 15. Th1 Kb5 16. Tg1 Sc6 17. Th1 Te8 18. Tg1 Te3 19. Th1 Td3 20. cxd3 c2 21. Tg1 cxd1=S 22. Th1 Sc3 23. Tg1 Se4 24. Th1 Dc3 25. Tg1 Sgf6 26. Th1 Se8 27. Tg1
Moldenhauer: Computerprüfung: C+ Stelvio 1.11 1 Sekunde.
Keine Lösung: BP 25.5, BP 26.0. (2023-04-02)
comment
Keine Lösung: BP 25.5, BP 26.0. (2023-04-02)
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Keywords: Unique Proof Game, Non-standard material, Pendulum (T x15), Promotion, Impostor (S)
Genre: Retro
Computer test: Stelvio 1.11
FEN: 4n3/pp4p1/2np2p1/rk3p2/b3n3/b1qP4/PP1PPPPP/RNB1KBR1
Reprints: 502 Europe Echecs 358 10/1988
102 Shortest Proof Games 11/1991
Input: Gerd Wilts, 1995-06-03
Last update: James Malcom, 2023-05-02 more...
Genre: Retro
Computer test: Stelvio 1.11
FEN: 4n3/pp4p1/2np2p1/rk3p2/b3n3/b1qP4/PP1PPPPP/RNB1KBR1
Reprints: 502 Europe Echecs 358 10/1988
102 Shortest Proof Games 11/1991
Input: Gerd Wilts, 1995-06-03
Last update: James Malcom, 2023-05-02 more...
1. b3 h5 2. La3 h4 3. Dc1 h3 4. Kd1 hxg2 5. h4 e5 6. h5 e4 7. h6 e3 8. h7 exf2 9. e4 f5 10. Se2 g1=L 11. Lg2 f1=L 12. e5 Lb6 13. d4 Lfc5 14. dxc5 f4 15. cxb6 f3 16. Df4 f2 17. Sc1 La6 18. Lc5 f1=L 19. a3 Lfb5 20. c4 Se7 21. cxb5 Tg8 22. hxg8=L g5 23. Lc4 d5 24. bxa6 Lf5 25. e6 Sc8 26. e7 Kf7 27. e8=L+ Kg8 28. Leb5 c6 29. Ta2 cxb5 30. Tc2 Sc6 31. Sa2 dxc4+
paul: Correction of P0001580 (2010-09-25)
Silvio Baier: Mit 30....dc+ ist das C+ (Euclide 0.98, Retractor für den letzten Zug) (2011-07-08)
James Malcom: So this is fully C+? (2021-01-27)
Henrik Juel: No, another problem in 30.0 moves ending with 30. Tc2 dxc4+ is tested OK (2021-01-27)
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Silvio Baier: Mit 30....dc+ ist das C+ (Euclide 0.98, Retractor für den letzten Zug) (2011-07-08)
James Malcom: So this is fully C+? (2021-01-27)
Henrik Juel: No, another problem in 30.0 moves ending with 30. Tc2 dxc4+ is tested OK (2021-01-27)
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Keywords: Ceriani-Frolkin Theme (lllLL), Unique Proof Game, Promotion (lllLL)
Genre: Retro
Computer test: Computerprüfung: C+ Stelvio 1.11 65:30:51 Stunden. (hh:mm:ss) Keine Lösung: BP 30.0, BP 30.5.
FEN: r1nq2k1/pp6/PPn5/1pB2bp1/2p2Q2/PP6/N1R3B1/1N1K3R
Reprints: 580 Ukrainisches Album 1986-1990
26 Shortest Proof Games 11/1991
H25 FIDE Album 1986-1988 1995
(H25) Die Schwalbe 156, p. 237, 12/1995
feenschach 141 06/2001
Thema Danicum 105 2002
(C) Quartz 22 10-12/2002
H2 The Problemist 07/2010
(18) Die Schwalbe 250A 08/2011
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-05-08 more...
Genre: Retro
Computer test: Computerprüfung: C+ Stelvio 1.11 65:30:51 Stunden. (hh:mm:ss) Keine Lösung: BP 30.0, BP 30.5.
FEN: r1nq2k1/pp6/PPn5/1pB2bp1/2p2Q2/PP6/N1R3B1/1N1K3R
Reprints: 580 Ukrainisches Album 1986-1990
26 Shortest Proof Games 11/1991
H25 FIDE Album 1986-1988 1995
(H25) Die Schwalbe 156, p. 237, 12/1995
feenschach 141 06/2001
Thema Danicum 105 2002
(C) Quartz 22 10-12/2002
H2 The Problemist 07/2010
(18) Die Schwalbe 250A 08/2011
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-05-08 more...
14 - P0001653
Philippe Leroy
522 Europe Echecs 373 01/1990
(12+13)
BP in 60.0
Es fand ein ep-Schlag statt. Welcher?
Philippe Leroy
522 Europe Echecs 373 01/1990
(12+13)
BP in 60.0
Es fand ein ep-Schlag statt. Welcher?
1. a3 b5 2. a4 b4 3. a5 c5 4. a6 Lb7 5. axb7 a5 6. c4 bxc3ep 7. e4 f5 8. e5 Sf6 9. exf6 c2 10. De2 d5 11. De4 dxe4 12. g4 h5 13. g5 Th6 14. gxh6 g5 15. Se2 h4 16. Sg3 hxg3 17. f7+ Kd7 18. d4 c4 19. d5 Ta6 20. h7 g2 21. h8=L g1=L 22. Lc3 a4 23. La5 g4 24. h4 Lh2 25. h5 g3 26. h6 g2 27. h7 g1=L 28. h8=L a3 29. Lhc3 a2 30. f3 Ld4 31. Lcb4 Lh8 32. La3 c3 33. Le3 c1=L 34. Lg1 c2 35. Sc3 Tf6 36. Sa4 Sa6 37. b8=L Lch6 38. Lba7 Lb8 39. Th4 c1=L 40. d6 Kc6 41. d7 Db6 42. d8=L Lcg5 43. Lc7 e3 44. Lch2 e5 45. Sc5 Sc7 46. Tb4 e4 47. Kd1 e2+ 48. Kc2 e1=L 49. f4 Leh4 50. Kc3 e3 51. Kd4 e2 52. Ke5 e1=L 53. Td1 a1=L 54. Td7 Leg3 55. Sa4 Df2 56. Sb6 Lfg7 57. Lb5+ Kc5 58. Lc6 Sd5+ 59. Tc7 Sxf4 60. f8=L+ Td6
James Malcom: A very interesting retro problem, with long-winded bishops promotions to cover its en passant tracks. (2021-01-24)
Hans-Jürgen Manthey: damit der Player klappt, muß 38. La7 in 38. Lba7 geändert werden. (2021-01-25)
James Malcom: Fixed. (2021-01-25)
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Hans-Jürgen Manthey: damit der Player klappt, muß 38. La7 in 38. Lba7 geändert werden. (2021-01-25)
James Malcom: Fixed. (2021-01-25)
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Keywords: Constrained problem, En passant, Non-standard material, Promotion, Non-Unique Proof Game
Genre: Retro
FEN: 1b3B1b/B1R3b1/1NBr3b/B1k1Kpb1/1R3n1b/B5b1/1P3q1B/b5B1
Input: Gerd Wilts, 1995-06-03
Last update: James Malcom, 2021-01-25 more...
Genre: Retro
FEN: 1b3B1b/B1R3b1/1NBr3b/B1k1Kpb1/1R3n1b/B5b1/1P3q1B/b5B1
Input: Gerd Wilts, 1995-06-03
Last update: James Malcom, 2021-01-25 more...
1. h4 d5 2. h5 d4 3. h6 d3 4. hxg7 h5 5. g4 h4 6. g5 h3 7. e4 h2 8. Sh3 Th6 9. Tg1 h1=D 10. e5 Dc6 11. Lg2 Dc3 12. dxc3 Tc6 13. e6 Sh6 14. g8=L Lg7 15. exf7 Kf8 16. Sd2 e5 17. Sf3 e4 18. Sh4 d2 19. Ke2 e3 20. Kf3 e2 21. g6 e1=D 22. Tb1 Dee7 23. De1 d1=T 24. Lg5 Da3 25. bxa3 Td4 26. Tb3 Tb4 27. cxb4 Lb2 28. Le7 Kg7 29. f8=S Sa6 30. Lc4 Sf7 31. Sd7 Kh6 32. Sb6 cxb6 33. g7 Sc7 34. La6 bxa6 35. g8=T Lb7 36. Tg5 Tc8 37. Ta5 bxa5
Cook: 1. h4 d5 2. h5 e5 3. h6 f5 4. hxg7 h5 5. Sa3 h4 6. Sc4 h3 7. Sb6 h2 8. e4 Th3 9. exf5 Ta3 10. Sh3 Sa6 11. Tg1 h1=D 12. g4 Df3 13. f6 Dc3 14. dxc3 cxb6 15. Tb1 Sc7 16. La6 bxa6 17. bxa3 Lb4 18. cxb4 Sh6 19. g8=L d4 20. Ld5 Kf8 21. Lg2 e4 22. Ke2 e3 23. Kf3 e2 24. f7 Kg7 25. f8=S e1=L 26. Sg6 Lc3 27. Sh4 d3 28. g5 d2 29. De1 d1=T 30. g6 Td6 31. Lg5 Tc6 32. Le7 Sf7 33. Tb3 Kh6 34. g7 Lb2 35. g8=T Lb7 36. Tg5 Tc8 37. Ta5 bxa5
Cook: 1. h4 d5 2. h5 e5 3. h6 f5 4. hxg7 h5 5. Sa3 h4 6. Sc4 h3 7. Sb6 h2 8. e4 Th3 9. exf5 Ta3 10. Sh3 Sa6 11. Tg1 h1=D 12. g4 Df3 13. f6 Dc3 14. dxc3 cxb6 15. Tb1 Sc7 16. La6 bxa6 17. bxa3 Lb4 18. cxb4 Sh6 19. g8=L d4 20. Ld5 Kf8 21. Lg2 e4 22. Ke2 e3 23. Kf3 e2 24. f7 Kg7 25. f8=S e1=L 26. Sg6 Lc3 27. Sh4 d3 28. g5 d2 29. De1 d1=T 30. g6 Td6 31. Lg5 Tc6 32. Le7 Sf7 33. Tb3 Kh6 34. g7 Lb2 35. g8=T Lb7 36. Tg5 Tc8 37. Ta5 bxa5
A.Buchanan: The unsoundness in this non-unique PG is that 6 promotions (apparently intended) are not forced (2023-05-11)
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Keywords: Ceriani-Frolkin Theme (dLdtST), Promotion, Non-Unique Proof Game, konsekutive Umwandlungen 6
Genre: Retro
Computer test: Computerprüfung: many solutions Stelvio 1.11 48 Sekunden. Keine Lösung: BP 36.0, BP 36.5.
FEN: 2rq4/pbn1Bn2/p1r4k/p7/1P5N/PR3K1N/PbP2PB1/4Q1R1
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-05-11 more...
Genre: Retro
Computer test: Computerprüfung: many solutions Stelvio 1.11 48 Sekunden. Keine Lösung: BP 36.0, BP 36.5.
FEN: 2rq4/pbn1Bn2/p1r4k/p7/1P5N/PR3K1N/PbP2PB1/4Q1R1
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-05-11 more...
16 - P0004249
Alexander Kislyak
588 Europe Echecs 425 07/1994
(8+14)
a) Welches waren die letzten 14 Einzelzüge?
b) Geschichte der BBa2, a7, h2 und h7?
Alexander Kislyak
588 Europe Echecs 425 07/1994
(8+14)
a) Welches waren die letzten 14 Einzelzüge?
b) Geschichte der BBa2, a7, h2 und h7?
R: 1. Ta1xBa2 f4-f5 2. h7-h5 f3-f4 3. Th6-h2 f2-f3 4. Th1xBh6 h5-h6 5. Lf7-e8 h4-h5 6. Lb3-f7 h3-h4 7. Ld1-b3 h2-h3
AV: The 4 rook-pawns made all varieties : capture (...axb6), small step (h2-h3), long step (...h7-h5) and... no move at all (...Rxa2+) ! (2014-12-04)
Hans-Jürgen Manthey: R: 1. Ta1xBa2 f4-f5 2. h7-h5 f3-f4 3. Th6-h2 f2-f3 4. Th1xBh6 h5-h6 5. Lf7-e8 h4-h5 6. Lb3-f7 h3-h4 7. Ld1-b3 h2-h3 8. c2xDd1=L Db1-d1 9. c3-c2 Dc2-b1 10. d4xTc3 Da4-c2 11. Tb1-h1 Tc1-c3 12. e5xLd4 Th1-c1 13. Tf1-b1 Db3-a4 14. Tc1xLf1 Dd1-b3 15. Lh6-f8 De1-d1 16. Ke8-d8 Dd1-e1 17. Kf8-e8 Db3-d1 Kg7-f8 Sd6-c8 Le3-h6 Tf8-b8 Tc6-c1 Tf4-f8 Tc1-a1 Sc4-d6 Tf6-c6 Kb8-a7 Da3-b2 Kc8-b8 Kf7-g7 Kd8-c8 Ke6-f7 Ke8-d8 Kd5-e6 Db1-b3 Te6-f6 Kf8-e8 a7xBb6 Kg7-f8 Tf6-e6 Kh6-g7 Tf8-f6 Kg5-h6 Db3-a3 Sa3-c4 Tc6-c1 Kg4-g5 Tf6-c6 Kf3-g4 Tb8-f8 Lb2-d4 Tf8-f6 b5-b6 Th8-f8 Tf8-f4 Ke6-d5 Tc8-f8 Kf7-e6 Ke4-f3 Kg7-f7 Tf8xLc8 Lh6-e3 Tf4-f8 f6xSe5 Sf3-e5 Dg8-b3 Kd4-e4 Dd8-g8 Kc3-d4 Kf8-g7 Kc2-c3 Ke8-f8 Kd1-c2 Lf8-h6 Ke1-d1 g7-g6 Dd1-b1 f7-f6 c2xSd3 Se5-d3+ Lc1-b2 Sg4-e5 Tb4-f4 Sf6-g4 Tb1-b4 Sg8-f6 Sg1-f3 Sb6-a8 Ta1-b1 Sd5-b6 Sb1-a3 Sb4-d5 Lb2-c1 Sc6-b4 b4-b5 Ta8-b8 Lc1-b2 Sb8-c6 b2-b4 (2021-07-24)
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Hans-Jürgen Manthey: R: 1. Ta1xBa2 f4-f5 2. h7-h5 f3-f4 3. Th6-h2 f2-f3 4. Th1xBh6 h5-h6 5. Lf7-e8 h4-h5 6. Lb3-f7 h3-h4 7. Ld1-b3 h2-h3 8. c2xDd1=L Db1-d1 9. c3-c2 Dc2-b1 10. d4xTc3 Da4-c2 11. Tb1-h1 Tc1-c3 12. e5xLd4 Th1-c1 13. Tf1-b1 Db3-a4 14. Tc1xLf1 Dd1-b3 15. Lh6-f8 De1-d1 16. Ke8-d8 Dd1-e1 17. Kf8-e8 Db3-d1 Kg7-f8 Sd6-c8 Le3-h6 Tf8-b8 Tc6-c1 Tf4-f8 Tc1-a1 Sc4-d6 Tf6-c6 Kb8-a7 Da3-b2 Kc8-b8 Kf7-g7 Kd8-c8 Ke6-f7 Ke8-d8 Kd5-e6 Db1-b3 Te6-f6 Kf8-e8 a7xBb6 Kg7-f8 Tf6-e6 Kh6-g7 Tf8-f6 Kg5-h6 Db3-a3 Sa3-c4 Tc6-c1 Kg4-g5 Tf6-c6 Kf3-g4 Tb8-f8 Lb2-d4 Tf8-f6 b5-b6 Th8-f8 Tf8-f4 Ke6-d5 Tc8-f8 Kf7-e6 Ke4-f3 Kg7-f7 Tf8xLc8 Lh6-e3 Tf4-f8 f6xSe5 Sf3-e5 Dg8-b3 Kd4-e4 Dd8-g8 Kc3-d4 Kf8-g7 Kc2-c3 Ke8-f8 Kd1-c2 Lf8-h6 Ke1-d1 g7-g6 Dd1-b1 f7-f6 c2xSd3 Se5-d3+ Lc1-b2 Sg4-e5 Tb4-f4 Sf6-g4 Tb1-b4 Sg8-f6 Sg1-f3 Sb6-a8 Ta1-b1 Sd5-b6 Sb1-a3 Sb4-d5 Lb2-c1 Sc6-b4 b4-b5 Ta8-b8 Lc1-b2 Sb8-c6 b2-b4 (2021-07-24)
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1. h4 a5 2. h5 Ta6 3. h6 Tb6 4. hxg7 Tb3 5. Th6 b5 6. Ta6 h5 7. axb3 h4 8. Ta4 h3 9. Th4 h2 10. c4 h1=T 11. Dc2 Th3 12. Dg6 Tc3 13. Th1 Thh3 14. Db6 Thf3 15. exf3 a4 16. Ld3 a3 17. Le4 a2 18. d3 a1=T 19. Le3 Ta4 20. Ld4 Tb4 21. Ta1 Ta4
White Rooks are permuted. Black Rooks are promotees. A very nice maneuver.
White Rooks are permuted. Black Rooks are promotees. A very nice maneuver.
Moldenhauer: Computerprüfung: C+ Stevio 1.11 00:49:45 Minuten.(hh:mm:ss)
Keine Lösung: BP20.0, BP 20.5. (2023-03-16)
Henrik Juel: Hello Moldenhauer
Your tests with Stelvio are much appreciated
Did you notice any improvement by version 1.11 over version 1.0? (2023-03-16)
Moldenhauer: Hallo Henrik Juel
Danke! Seit der neuen Version Stelvio 1.11 hat sich die Anzahl der Strategien reduziert.
Beispiel: P1000406 von 6775 auf 4994, was natürlich das Tempo erhöht. Habe ich zufällig bemerkt.
Dieses Beispiel habe ich auch gespeichert. Herr Reto Aschwanden schrieb glaube ich auch darüber.
Bei mir laufen immer mehrere Stelvios gleichzeitig. Vielleicht ist mein Rechner deshalb
gegenüber anderen langsamer. AMD Ryzen 3950X 16 Kerne 3 Jahre alt. (2023-03-16)
Henrik Juel: Thanks, Moldenhauer (2023-03-20)
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Keine Lösung: BP20.0, BP 20.5. (2023-03-16)
Henrik Juel: Hello Moldenhauer
Your tests with Stelvio are much appreciated
Did you notice any improvement by version 1.11 over version 1.0? (2023-03-16)
Moldenhauer: Hallo Henrik Juel
Danke! Seit der neuen Version Stelvio 1.11 hat sich die Anzahl der Strategien reduziert.
Beispiel: P1000406 von 6775 auf 4994, was natürlich das Tempo erhöht. Habe ich zufällig bemerkt.
Dieses Beispiel habe ich auch gespeichert. Herr Reto Aschwanden schrieb glaube ich auch darüber.
Bei mir laufen immer mehrere Stelvios gleichzeitig. Vielleicht ist mein Rechner deshalb
gegenüber anderen langsamer. AMD Ryzen 3950X 16 Kerne 3 Jahre alt. (2023-03-16)
Henrik Juel: Thanks, Moldenhauer (2023-03-20)
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Keywords: Unique Proof Game, Interchange (TT), Promotion
Genre: Retro
Computer test: Stelvio 1.11
FEN: 1nbqkbn1/2ppppP1/1Q6/1p6/r1PBB3/1PrP1P2/1P3PP1/RN2K1NR
Input: Gerd Wilts, 1996-06-16
Last update: Silvio Baier, 2023-03-20 more...
Genre: Retro
Computer test: Stelvio 1.11
FEN: 1nbqkbn1/2ppppP1/1Q6/1p6/r1PBB3/1PrP1P2/1P3PP1/RN2K1NR
Input: Gerd Wilts, 1996-06-16
Last update: Silvio Baier, 2023-03-20 more...
1. Kb8 Ka4 2. Kc8 Ka3 3. Kd8 Ka4 4. Ke8 Ka3 5. Kf8 Ka4 6. Kg7 Ka3 7. Kf6 Ka4 8. Kg5 Ka3 9. Kf4 Ka4 10. Kxe4 Ka3 11. Kd3 Ka4 12. e4 Ka3 13. e3 Ka4 14. e2 Ka3 15. e1=D Ka4 16. Dxe6 Ka3 17. Dd7 cxd7 18. Kc2 d8=D 19. Kb1 Dd1#
Keywords: Promotion (Dd), Entblockung, Ceriani-Frolkin Theme (d), Model mate, Königswanderung, Switchback (K), Kindergarten Problem, Pronkin Theme (D)
Genre: h#
Computer test: Gustav 4.1d
FEN: 8/k1p1p3/1pP1P2p/1P2p2P/1Pp1P3/KpP5/1P6/8
Input: Hans-Jürgen Schäfer, 1999-01-01
Last update: A.Buchanan, 2021-04-06 more...
Genre: h#
Computer test: Gustav 4.1d
FEN: 8/k1p1p3/1pP1P2p/1P2p2P/1Pp1P3/KpP5/1P6/8
Input: Hans-Jürgen Schäfer, 1999-01-01
Last update: A.Buchanan, 2021-04-06 more...
1. Sc5 Kxf2 2. e1=S Kg3 3. Lh5 Kxh3 4. d1=L Kg3 5. Lg5 h4 6. c1=S hxg5 7. Dh7 g6 8. b1=L gxh7 9. Le8 h8=D#,L#
Umwandlungsdual
Moldenhauer: Computerprüfung: C+ Gustav 4.1d in 12 Min. 45 Sek. (2022-07-03)
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Moldenhauer: Computerprüfung: C+ Gustav 4.1d in 12 Min. 45 Sek. (2022-07-03)
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1. Lb4! droht 2. Lc5 ... 3. d3#
1. ... Lxf6 2. f5+ Ke5 3. d4#
1. ... g5 2. fxg5+ Ke5 3. d4#
1. ... g1=D 2. d3+ Kd4 3. Dxg1# 2. ... Ke3 3. Lc5#
1. ... Kd4 2. De6 ... 3. Dd5#
1. ... Lxf6 2. f5+ Ke5 3. d4#
1. ... g5 2. fxg5+ Ke5 3. d4#
1. ... g1=D 2. d3+ Kd4 3. Dxg1# 2. ... Ke3 3. Lc5#
1. ... Kd4 2. De6 ... 3. Dd5#
1. Lf5! e1=S 2. Lg4 g1=S 3. Se4 a1=D 4. Lc8+ Kb5 5. Sd6#
Keywords: Brian Stephenson Collection (36900), Promotion (sD), konsekutive Umwandlungen 3 (ssd), Holst promotion (zweifach, sS), Staggered preplans
Genre: n#
Computer test: Juel: Popeye 4.61
FEN: 3N2K1/3B4/kB6/2P5/pp6/6N1/p3p1p1/8
Reprints: XVI. Die Schwalbe 22, p. 80, 08/1973
118 Ausgewählte Schachaufgaben [Zucker] , p. 62, 1989
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2023-10-01 more...
Genre: n#
Computer test: Juel: Popeye 4.61
FEN: 3N2K1/3B4/kB6/2P5/pp6/6N1/p3p1p1/8
Reprints: XVI. Die Schwalbe 22, p. 80, 08/1973
118 Ausgewählte Schachaufgaben [Zucker] , p. 62, 1989
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2023-10-01 more...
1. g5 2. g4 3. gxh3 4. h2 5. h1=L 6. Lxc6 7. Le8 8. c5 9. c4 10. c3 11. c2 12. c1=L 13. Ld2 14. Lxa5 15. Ld8 16. a5 17. a4 18. a3 19. a2 20. a1=L 21. Lxb2 22. Lc1 23. Lxh6 24. Lf8 25. h5 26. h4 27. h3 28. h2 29. h1=L 30. L1c6 31. L6d7 f6#
4 sL-Umwandlungen
4 sL-Umwandlungen
Erich Bartel: Bei der angegebenen Quelle dürfte es sich um einen Nachdruck handeln.
Lt. dem mir vorliegenden Original-Heft ist die Erstquelle:
1894 Europe Echecs (162) VII 1972.---
weiterer Nachdruck:
2) 81 feenschach (16) VIII 1973 (2009-07-27)
SBD: The 1978 second edition of Rice and Dickins The Serieshelpmate gives the BCM source, so perhaps the error crept in by the citation of the secondary source through the book? (2009-08-01)
Anton Baumann: C+ Alybadix (2020-11-17)
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Lt. dem mir vorliegenden Original-Heft ist die Erstquelle:
1894 Europe Echecs (162) VII 1972.---
weiterer Nachdruck:
2) 81 feenschach (16) VIII 1973 (2009-07-27)
SBD: The 1978 second edition of Rice and Dickins The Serieshelpmate gives the BCM source, so perhaps the error crept in by the citation of the secondary source through the book? (2009-08-01)
Anton Baumann: C+ Alybadix (2020-11-17)
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Keywords: Excelsior black, Promotions to bishops, Seriesmover
Genre: Fairies
FEN: 8/p1p1kppp/2P1p2P/P3PP2/8/7P/1P6/5K2
Reprints: British Chess Magazine 08/1972
81) feenschach 16, p. 114, 08/1973
Input: HBae, 2009-02-06
Last update: Alfred Pfeiffer, 2017-01-18 more...
Genre: Fairies
FEN: 8/p1p1kppp/2P1p2P/P3PP2/8/7P/1P6/5K2
Reprints: British Chess Magazine 08/1972
81) feenschach 16, p. 114, 08/1973
Input: HBae, 2009-02-06
Last update: Alfred Pfeiffer, 2017-01-18 more...
Show statistic for complete result. Show search result faster by using ids.
https://pdb.dieschwalbe.de/search.jsp?expression=COMMENTDATE%3E%3D20200919+AND+NOT+K%3D%27Hilfsr%C3%BCckz%C3%BCger%27+AND+K%3D%27Umwandlung%27+AND+S%3D%27Europe+Echecs%27
The problems of this query have been registered by the following contributors:
Gerd Wilts (17)Hans-Jürgen Schäfer (2)
Brian Stephenson (2)
HBae (1)
Henrik Juel: ... as wLb3 is a pawn promoted on e8 or g8
Nice type Høeg defensive retractor
Here are some other explanatory comments
In retraction 1 White chooses to move his king back to h3; Black could choose to supplement a black man on g3 (or nothing), but supplementing a pawn is the only way to maintain legality (Kh3 stands in double check from Lc8 and Dh8); again moving Pg3 back to h3 and White supplementing a pawn on g4 is forced (this e.p. case is the only one where the supplementing does no happen on the abandoned square)
In retraction 2 the white retraction is forced, and then moving Kd6 back to d7 to uncheck is illegal because of the double check from Sb6 and Pc6, so Black must uncheck by moving Kd6 back to e6 and White choose to supplement a pawn on the abandoned square
In retraction 3 White chooses to move Pd6 back to e5, forcing another e.p. situation (2023-04-08)
Henrik Juel: The Proca type is easy to define: White and Black alternate retractions, until White can mate with a forward move
The Høeg type is usually defined the same way, except that the other side decides which man (if any) was captured; but this can be detailed as follows:
1. White chooses a man and 'moves it back'
2. Black chooses which man (if any) to 'supplement' on the abandoned square
(only now is the white retraction complete)
3. Black chooses a man and 'moves it back'
4. White chooses which man (if any) to 'supplement' on the abandoned square
(only now is the black retraction complete)
etc. etc. until, following a white retraction, White can mate with a forward move
In tries, Black can ruin the white plan by mating White with a forward move after a black retraction
It goes without saying that the resulting retractions must be legal
'supplement' is my (poor) translation of the danish term 'supplere'; maybe 'add' would be better
'the abandoned square' needs a special interpretation in the e.p. case, which happens twice in this problem
These details may be the cause why new type Høeg defensive retractors are rarely seen, as type Proca is more natural and straightforward (2023-04-08)
A.Buchanan: Thanks Henrik. Yesterday, I went through all the defensive retractors to clear up keywords & genres. There were a very few where the stip did not specify the VRZ Type, and others where Anticirce did not specify Calvet vs Cheylan. The answers are probably obvious to you, and if you want to comment on those, then I will update the stips & keywords.
A more general question: Typ Friedlich appears to be the German for Type Pacific: can we standardize on one? (2023-04-08)
Henrik Juel: Thanks Andrew for enabling me to post my type Høeg spiel once again
Anticirce without specification usually means that both Calvet and Cheylan work
Friedlich is indeed german for Pacific, and as the PDB is a german product, I guess we must live with the present conditions (2023-04-08)
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