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1 problem(s) found in 8331 milliseconds (displaying 1 problem(s)). [COMMENTDATE>=20200919 AND NOT K='Hilfsrückzüger' AND NOT S='Sem Schachmatnych Not' AND K='Konsekutive Umwandlungen 9'] [download as LaTeX]

1 - P1381570
Grigory Popov

1st-5th Prize, Vladislav Tarasiuk-50 JT
P1381570
(11+12) cooked
#33
1. a8=D! Da5 2. Dxa5 Txa5 3. b8=D Ta1 4. Da8+ Txa8 5. e8=D Ta1 6. Da8+ Txa8 7. La3 Txa3 8. g8=D Ta1 9. Da8+ Txa8 10. c8=D Ta1 11. Dc6+ e4 12. Da4 Txa4 13. h8=D Tb4 14. Sc3 Tb2 15. d8=D Te2 16. Sxe2 dxe2+ 17. Kxe2 Kg2 18. Da1 Sf4+ 19. Kd2 f1=S+ 20. Kc3 Se2+ 21. Kxc4 Le3 22. f8=D Seg3 23. Dfa3 Sd2+ 24. Kb5 Lf4 25. Dd1 Sdf1 26. Da2,Db2+ Sd2 27. Daxd2,D8xd2+ Lxd2 28. D8xd2,D2xd2+ Kh3 29. Df2 e3 30. Dxe3 f4 31. Df2 Sf1 32. Ddf3+ Sg3 33. D2g2#
play all play one stop play next play all
http://www.arves.org/arves/index.php/en/awards/awards-replayable/1341-tarasiuk-50-jt-2018

Reprint: http://superproblem.ru/archive/probl/N/Popov-33-2018.gif
Cook: Mate in 14 with changed colours and sides:
1... a2-a1D 2.Da3-b3 d2-d1D 3.Db3-b6 Da1-a8 4.Db6-c7 Sd8-c6 5.Sh6-f5 Da8-d8 6.Td4-a4 Dd1-d4 7.Ta4xd4 g2-g1D 8.Td4-a4 Dd8-f6 9.Kh8-h7 Df6-g6 10.Kh7xg6 Dg1xg4 11.Kg6-f6 Dg4xf5 12.Be4xf5 e2-e1D 13.Ta4-a8 Sc6-b8 14.Dc7-c8 De1-e8 15.f7xe8D#
2... b2-b1D 3.Db3-d5 d2-d1D 4.Dd5-g5 Dd1xd4 5.Be4-e5 Dd4xe5 6.Bf4xe5 Da1xe5 7.Dg5xe5 Sd8-e6 8.De5-f6 Db1-b7 9.Sh6-f5 Db7-b2 10.Df6xb2 e2-e1D 11.Db2-b8 Se6-d8 12.Db8xd8 De1-e8 13.f7xe8D#
2... b2-b1T 3.Db3-d5 Tb1-b7 4.Dd5-e5 Da1xd4 5.De5xd4 Tb7xf7 6.Sh6xf7 d2-d1D 7.Dd4-f6 Sd8-c6 8.Sf7-h6 Kf8-e8 9.Df6-e6 Sc6-e7 10.De6xe7#
2... Da1-a5 3.Db3-d5 d2-d1D 4.Dd5-g5 Dd1xd4 5.Be4-e5 Dd4xe5 6.Bf4xe5 Sd8xf7 7.Lg8xf7 nebst 8.Dg5-e7/Dg5-g7/Dg5-g8#
2... Da1-a7 3.Db3-b5 Da7xf7 4.Lg8xf7 Sd8xf7 5.Sh6xf7 b2-b1D 6.Db5-d7 Db1-b7 7.Dd7xb7 nebst 8.Db7-e7#
2... Da1-a8 3.Td4-a4 Da8-a7 4.Ta4xa7 b2-b1D 5.Ta7-e7 Db1-a1 6.Be4-e5 Da1-a4 7.Db3xa4 droht 8.Da4-e8/Te7-e8#
2... e2-e1D 3.Db3-b8 Da1-a5 4.Bd6-d7 De1xe4 5.Td4xe4 Da5-c3 6.Te4-e5 Dc3xe5 7.Bf4xe5 nebst 8.Db8-d6/Db8xd8#
1... a2-a1T 2.Td4-d5 Ta1xa3 3.Td5-e5 Sd8-e6 4.Te5xe6 Ta3-a8 5.Bd6-d7 Ta8-b8 6.Te6-e8 Tb8xe8 7.d7xe8D#
James Malcom: This may very well be impossible to C+ with Gustav, but there is an alternative for manual/partial testing by using chess.com's free analysis. When you enter in the position, it completely agrees with the first full 14 moves. It ponders on 15. between which pawn to queen. If you manually enter 15. d8=Q, then the following engine evaluation generally agrees with the solution, and eventually is will find the mate on some point. (2020-11-06)
A.Buchanan: It’s not a matter of style whether you have space after comma in the solution. It’s incorrect syntax for the editor (2020-11-06)
edderiofer: According to this Reddit thread, there is a refutation 1...Qb6 : https://www.reddit.com/r/chess/comments/zslnov/this_2018_awardwinning_study_is_wrong_can_you/

I can confirm that Lichess' analysis agrees; after 1.Qa8 Qb6 Lichess eventually returns a mate for Black for every white move but 2.d8=Q, and after 2...Qb3 (any) Black has mate in twelve. (2022-12-23)
edderiofer: According to this Reddit thread, there is a refutation 1...Qb6 : https://www.reddit.com/r/chess/comments/zslnov/this_2018_awardwinning_study_is_wrong_can_you/

I can confirm that Lichess' analysis agrees; after 1.Qa8 Qb6 Lichess eventually returns a mate for Black for every white move but 2.d8=Q, and after 2...Qb3 (any) Black has mate in twelve. (2022-12-23)
Olaf Jenkner: Gustav confirms that black can mate in 14 moves. (2022-12-23)
James Malcom: I emailed Popov about this, and he suggested Rd5-c5. How does this correction fare? (2023-01-07)
Olaf Jenkner: Now white can mate in 14 moves. There are 3 full length variations:

1. b8=D c3 2. a8=D+ e4 3. Dxa6 c2 4. Dxd3 cxd1=D+ 5. Dxd1 Tc3 6. Dbb1 Kh2 7. h8=D Kh1 8. g8=D Te3 9. Dxh4 g4 10. Dxe4+ fxe4 11. Dgxg4 Te1+ 12. Dxe1 fxe1D+ 13. D4xe1 La7 14. Dg2#
1. ... e4 2. a8=D Da5 3. Dxa5 Txa5 4. Db1 c3 5. d8=D c2 6. Dxd3 Kh2 7. Dd6+ Kh1 8. Dxc2 Ta1 9. g8=D Tb1 10. Ddd3 Txd1+ 11. Dcxd1 Kh2 12. Dxh3+ Kxh3 13. Dxg5 e3 14. Dg2#
1. ... Da5 2. a8=D+ e4 und weiter wie oben (2023-01-13)
comment
Keywords: konsekutive Umwandlungen 9 (DDDDDDDsD), Promotion key, under-promotion (s)
Genre: n#
FEN: 5B2/PPPPPPPP/q7/3rppp1/2p4p/3p3n/5p2/3N1Kbk
Input: James Malcom, 2020-11-06
Last update: Olaf Jenkner, 2022-12-23 more...
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