Hello:
I have just won this game:
[pgn][Event "Online game"]
[Site "www.flyordie.com/chess/"]
[Date "2017.02.17"]
[Round "1"]
[White "guest#1296929"]
[Black "OMITTED FOR OBVIOUS REASONS"]
[Result "1-0"]
[WhiteTime "R0:03:59"]
[BlackElo "5"]
[BlackTime "R0:03:29"]
[Termination "normal"]
[TimeControl "300"]
[UTCDate "2017.02.17"]
1. d4 d5 2. c4 e6 3. Nc3 Bb4 4. Qb3 Qd6 5. e3 Ne7 6. Bd2 f5 7. a3 Bxc3 8. Bxc3
b6 9. Nf3 O-O 10. Bd3 e5 11. Nxe5 Qh6 12. cxd5 Nd7 13. d6+ Kh8 14. dxe7 Re8 15.
Nf7+ Kg8 16. Nxh6+ Kh8 17. Qg8+ Rxg8 18. Nf7# 1-0[/pgn]
I know that it is nothing special, but I am satisfied because I played the moves relatively fast. In a five-minute game, clocks ended as follows: white with 3:59 and black with 3:29.
I did a quick search on the forum about 'smothered mate' and I have not seen recent posts on it. Are there any recent examples of computer-computer games with this mate? Or GUIs adjudicate games before it? Thanks in advance.
Regards from Spain.
Ajedrecista.
Smothered mate.
Moderator: Ras
-
Ajedrecista
- Posts: 2242
- Joined: Wed Jul 13, 2011 9:04 pm
- Location: Madrid, Spain.
-
MikeB
- Posts: 4889
- Joined: Thu Mar 09, 2006 6:34 am
- Location: Pen Argyl, Pennsylvania
Re: Smothered mate.
nicely done, to save time, my guess is that most CvsC games are being adjudicated now - but 10 years ago I found one ( out of 689865 games) smothered mate on the CCRL 40/40 database, if you use the definition that all potential escape squares are occupied by his own pieces. .Ajedrecista wrote:Hello:
I have just won this game:
[pgn][Event "Online game"]
[Site "www.flyordie.com/chess/"]
[Date "2017.02.17"]
[Round "1"]
[White "guest#1296929"]
[Black "OMITTED FOR OBVIOUS REASONS"]
[Result "1-0"]
[WhiteTime "R0:03:59"]
[BlackElo "5"]
[BlackTime "R0:03:29"]
[Termination "normal"]
[TimeControl "300"]
[UTCDate "2017.02.17"]
1. d4 d5 2. c4 e6 3. Nc3 Bb4 4. Qb3 Qd6 5. e3 Ne7 6. Bd2 f5 7. a3 Bxc3 8. Bxc3
b6 9. Nf3 O-O 10. Bd3 e5 11. Nxe5 Qh6 12. cxd5 Nd7 13. d6+ Kh8 14. dxe7 Re8 15.
Nf7+ Kg8 16. Nxh6+ Kh8 17. Qg8+ Rxg8 18. Nf7# 1-0[/pgn]
I know that it is nothing special, but I am satisfied because I played the moves relatively fast. In a five-minute game, clocks ended as follows: white with 3:59 and black with 3:29.
I did a quick search on the forum about 'smothered mate' and I have not seen recent posts on it. Are there any recent examples of computer-computer games with this mate? Or GUIs adjudicate games before it? Thanks in advance.
Regards from Spain.
Ajedrecista.
[pgn][Event "CCRL 40/40"]
[Site "CCRL"]
[Date "2007.09.14"]
[Round "91.2"]
[White "Rybka 2.3.2a 64-bit"]
[Black "Scorpio 1.81"]
[Result "1-0"]
[ECO "B33"]
[WhiteElo "2966"]
[BlackElo "2645"]
[PlyCount "79"]
[EventDate "2007.??.??"]
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5 5. Nb5 d6 6. N1c3 Nf6 7. Bg5 a6 8.
Na3 b5 9. Bxf6 gxf6 10. Nd5 Be6 11. Bd3 Rg8 12. O-O Bh3 13. g3 Bxf1 14. Bxf1
Be7 15. c3 Kf8 16. Nc2 Rg6 17. a4 bxa4 18. Nce3 a3 19. Rxa3 Kg8 20. Be2 Bf8 21.
Bh5 Rg5 22. h4 Rg7 23. Nf5 Rg6 24. Qe2 Nb8 25. b4 Kh8 26. Bxg6 fxg6 27. Nfe3
Bh6 28. Nc4 Ra7 29. b5 f5 30. exf5 gxf5 31. Qh5 Qf8 32. Ra4 Bg7 33. b6 Rd7 34.
Na5 Qg8 35. Rc4 Rf7 36. Nc6 Nxc6 37. Rxc6 f4 38. Rc7 Rf8 39. Ne7 f3 40. Ng6#
1-0[/pgn]
although the game was lost , 39. ..f3 was a gross error since it allowed the mate-in-one - it could have extended the game a few moves with Qe6
-
S.Taylor
- Posts: 8514
- Joined: Thu Mar 09, 2006 3:25 am
- Location: Jerusalem Israel
Re: Smothered mate.
I'm sure it comes up in deep search frequently but it would stay FAR FAR AWAY from being played on the board, and almost as far away from shown lines too.Ajedrecista wrote: I did a quick search on the forum about 'smothered mate' and I have not seen recent posts on it. Are there any recent examples of computer-computer games with this mate? Or GUIs adjudicate games before it? Thanks in advance.
Regards from Spain.
Ajedrecista.
-
S.Taylor
- Posts: 8514
- Joined: Thu Mar 09, 2006 3:25 am
- Location: Jerusalem Israel
Re: Smothered mate.
Yes, Qe6 was MUCH better. Black must have been a very ancient computer. Maybe on a plane!MikeB wrote: although the game was lost , 39. ..f3 was a gross error since it allowed the mate-in-one - it could have extended the game a few moves with Qe6
-
Colin-G
- Posts: 191
- Joined: Mon Oct 31, 2016 6:30 pm
- Location: England
Re: Smothered mate.
I did a search on my engine-engine match database of 28000+ games for the following -
Nf7# Nf2# Nc2# Nc7# Ng6# Ng3# Nb6# Nb3#
17 games were found, but only one was a smothered mate.
[pgn]
[Event "Computer chess game"]
[Site "PC70"]
[Date "2015.05.23"]
[Round "1"]
[White "MinkoChess 1.3"]
[Black "Amy083"]
[Result "1-0"]
[ECO "D97p"]
[TimeControl "40/240"]
1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 Na6 8.Be2 c5 9.d5 e6 10.O-O exd5 11.exd5 Bf5 12.Be3 Ng4 13.Bf4 Qb6 14.h3 Nf6 15.g4 Bc8 16.Rfe1 Qxb2 17.Rab1 Qa3 18.Rb5 Nb8 19.Bd6 Re8 20.Bxc5 Qa6 21.Bd4 b6 22.g5 Nh5 23.Bxg7 Nxg7 24.Ne4 Nh5 25.Nd6 Rf8 26.Ne5 Bd7 27.Nexf7 Rxf7 28.Nxf7 Ng7 29.Nh6+ Kh8 30.Qf4 Qc8 31.Nf7+ Kg8 32.Bg4 Bf5 33.Nh6+ Kh8 34.Re7 Qc3 35.Bxf5 gxf5 36.Qxf5 Nc6 37.Qf7 Qc1+ 38.Kh2 Nxe7 39.Qg8+ Nxg8 40.Nf7#
Xboard adjudication: Checkmate
1-0
[/pgn]
Nf7# Nf2# Nc2# Nc7# Ng6# Ng3# Nb6# Nb3#
17 games were found, but only one was a smothered mate.
[pgn]
[Event "Computer chess game"]
[Site "PC70"]
[Date "2015.05.23"]
[Round "1"]
[White "MinkoChess 1.3"]
[Black "Amy083"]
[Result "1-0"]
[ECO "D97p"]
[TimeControl "40/240"]
1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 Na6 8.Be2 c5 9.d5 e6 10.O-O exd5 11.exd5 Bf5 12.Be3 Ng4 13.Bf4 Qb6 14.h3 Nf6 15.g4 Bc8 16.Rfe1 Qxb2 17.Rab1 Qa3 18.Rb5 Nb8 19.Bd6 Re8 20.Bxc5 Qa6 21.Bd4 b6 22.g5 Nh5 23.Bxg7 Nxg7 24.Ne4 Nh5 25.Nd6 Rf8 26.Ne5 Bd7 27.Nexf7 Rxf7 28.Nxf7 Ng7 29.Nh6+ Kh8 30.Qf4 Qc8 31.Nf7+ Kg8 32.Bg4 Bf5 33.Nh6+ Kh8 34.Re7 Qc3 35.Bxf5 gxf5 36.Qxf5 Nc6 37.Qf7 Qc1+ 38.Kh2 Nxe7 39.Qg8+ Nxg8 40.Nf7#
Xboard adjudication: Checkmate
1-0
[/pgn]
-
S.Taylor
- Posts: 8514
- Joined: Thu Mar 09, 2006 3:25 am
- Location: Jerusalem Israel
Re: Smothered mate.
How many times in a billion games, might the ending between 2 strong computers be a long vision forced smothered mate?
I don't even know i f there would be ONE.
But how many times in only 1000 games (not a billion) does a critical variation end in a smothtered mate?
Maybe as much as a few!
I don't even know i f there would be ONE.
But how many times in only 1000 games (not a billion) does a critical variation end in a smothtered mate?
Maybe as much as a few!
-
MikeB
- Posts: 4889
- Joined: Thu Mar 09, 2006 6:34 am
- Location: Pen Argyl, Pennsylvania
Re: Smothered mate.
Amy083 could have also extended the game , but chose not to. Amy played some pretty bad moves, a good engine for humans to play.Colin-G wrote:I did a search on my engine-engine match database of 28000+ games for the following -
Nf7# Nf2# Nc2# Nc7# Ng6# Ng3# Nb6# Nb3#
17 games were found, but only one was a smothered mate.
[pgn]
[Event "Computer chess game"]
[Site "PC70"]
[Date "2015.05.23"]
[Round "1"]
[White "MinkoChess 1.3"]
[Black "Amy083"]
[Result "1-0"]
[ECO "D97p"]
[TimeControl "40/240"]
1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 Na6 8.Be2 c5 9.d5 e6 10.O-O exd5 11.exd5 Bf5 12.Be3 Ng4 13.Bf4 Qb6 14.h3 Nf6 15.g4 Bc8 16.Rfe1 Qxb2 17.Rab1 Qa3 18.Rb5 Nb8 19.Bd6 Re8 20.Bxc5 Qa6 21.Bd4 b6 22.g5 Nh5 23.Bxg7 Nxg7 24.Ne4 Nh5 25.Nd6 Rf8 26.Ne5 Bd7 27.Nexf7 Rxf7 28.Nxf7 Ng7 29.Nh6+ Kh8 30.Qf4 Qc8 31.Nf7+ Kg8 32.Bg4 Bf5 33.Nh6+ Kh8 34.Re7 Qc3 35.Bxf5 gxf5 36.Qxf5 Nc6 37.Qf7 Qc1+ 38.Kh2 Nxe7 39.Qg8+ Nxg8 40.Nf7#
Xboard adjudication: Checkmate
1-0
[/pgn]
-
Ajedrecista
- Posts: 2242
- Joined: Wed Jul 13, 2011 9:04 pm
- Location: Madrid, Spain.
Re: Smothered mate.
Hello:
I won a 5+0 blitz game today with other smothered checkmate:
[pgn][Event ""]
[Site ""]
[Date "2026.05.18"]
[Round ""]
[TimeControl "300+0"]
[Result "1-0"]
1. d4 c6 2. c4 d5 3. Nf3 Bg4 4. e3 e6 5. cxd5 cxd5 6. Nc3 Nf6 7. Be2 Nc6 8. O-O Bd6 9. Nh4 Bxe2 10. Qxe2 Ne4 11. Nf3 a6 12. Nxe4 dxe4 13. Nd2 f5 14. Qc4 Qf6 15. Nb3 O-O 16. Nc5 Bxh2+ 17. Kxh2 Qh4+ 18. Kg1 Rf6 19. f4 Rh6 20. Nxe6 Na5 21. Qd5 Qh2+ 22. Kf2 Qh4+ 23. Ke2 Qg3 24. Rf2 Rh2 25. Ng5+ Kh8 26. Nf7+ Kg8 27. Nh6+ Kh8 28. Qg8+ Rxg8 29. Nf7# 1-0[/pgn]
I had checkmated with this pattern very few times, so makes me happy when I can. I missed the chance one move earlier, but my opponent was kind enough to give me other chance. Clocks ended as follows: white with 1:26 and black with 1:42.
This game had something more than the nice checkmate: I played 16.- Nc5 and SF 18 thinks that black is better about 0.5 or 0.6 pawns. I expected 16.- ..., Bxc5 like SF, but got surprised with 16.- ..., Bxh2+?!:
[d]r4rk1/1p4pp/p1nbpq2/2N2p2/2QPp3/4P3/PP3PPP/R1B2RK1 b - - 5 16
I am unsure if it could be consider as a Greek gift sacrifice, but my surprise was that SF evaluates below 1 pawn for white, considering that the white king can leave the kingside through f2 at some point. Later than that, you can not expect GM level of play.
My local copy of SF was a bit slow to evaluate 21.- Qd5 as winning after 20.- ..., Na5?, with Multi-PV = 7 and without clearing hash:
------------
This thread is smothered checkmate related. When was this checkmate pattern first recorded? The Wikipedia article surprised me, pointing to the Lucena's book of 1497. YACPDB helped me to identify the problem as checkmate in five moves and I finally found the problem with solution at page 132 of this copy of the book. We can see 'light on right' that early, but the notation is verbous. Each diagramme has got some letters (A, B, C, ...) on key squares of the solutions. For example, in that early smothered mate problem, A=e6 (queen to A, giving check), B=f7, C=h6, D=g8 and E=f7 again, this is, pieces moving to A, B and so on [Qe6+, Nf7+, Nh6+ ('discovered check' as written in the book), Qg8+ and Nf7#]. The diagramme also marks d8 square as I, giving other option: 3.- Nd8+ (knight to I) instead of 3.- Nh6+, followed by 4.- Qe8+, Qf8; 5.- Qxf8#.
[d]rr4k1/6pp/2Q5/3KN3/8/q7/8/8 w - - 0 1
Regards from Spain.
Ajedrecista.
I won a 5+0 blitz game today with other smothered checkmate:
[pgn][Event ""]
[Site ""]
[Date "2026.05.18"]
[Round ""]
[TimeControl "300+0"]
[Result "1-0"]
1. d4 c6 2. c4 d5 3. Nf3 Bg4 4. e3 e6 5. cxd5 cxd5 6. Nc3 Nf6 7. Be2 Nc6 8. O-O Bd6 9. Nh4 Bxe2 10. Qxe2 Ne4 11. Nf3 a6 12. Nxe4 dxe4 13. Nd2 f5 14. Qc4 Qf6 15. Nb3 O-O 16. Nc5 Bxh2+ 17. Kxh2 Qh4+ 18. Kg1 Rf6 19. f4 Rh6 20. Nxe6 Na5 21. Qd5 Qh2+ 22. Kf2 Qh4+ 23. Ke2 Qg3 24. Rf2 Rh2 25. Ng5+ Kh8 26. Nf7+ Kg8 27. Nh6+ Kh8 28. Qg8+ Rxg8 29. Nf7# 1-0[/pgn]
I had checkmated with this pattern very few times, so makes me happy when I can. I missed the chance one move earlier, but my opponent was kind enough to give me other chance. Clocks ended as follows: white with 1:26 and black with 1:42.
This game had something more than the nice checkmate: I played 16.- Nc5 and SF 18 thinks that black is better about 0.5 or 0.6 pawns. I expected 16.- ..., Bxc5 like SF, but got surprised with 16.- ..., Bxh2+?!:
[d]r4rk1/1p4pp/p1nbpq2/2N2p2/2QPp3/4P3/PP3PPP/R1B2RK1 b - - 5 16
I am unsure if it could be consider as a Greek gift sacrifice, but my surprise was that SF evaluates below 1 pawn for white, considering that the white king can leave the kingside through f2 at some point. Later than that, you can not expect GM level of play.
My local copy of SF was a bit slow to evaluate 21.- Qd5 as winning after 20.- ..., Na5?, with Multi-PV = 7 and without clearing hash:
Code: Select all
FEN: r5k1/1p4pp/p3N2r/n4p2/2QPpP1q/4P3/PP4P1/R1B2RK1 w - - 1 21
Stockfish-18-windows-x86-64-sse41-popcnt:
[...]
---------------------------------------------------------------------------
18/5 00:00 419.247 521.451 0,00 Qc4c5 Qh4h1+ Kg1f2 Qh1h4+
18/7 00:00 419.247 521.451 0,00 Qc4c3 Qh4h2+ Kg1f2 Qh2h4+ Kf2g1
18/9 00:00 419.247 521.451 0,00 Qc4a4 Qh4h2+ Kg1f2 Rh6h3 Ne6g5 Qh2g3+ Kf2g1 Qg3h2+
18/5 00:00 419.247 521.451 0,00 Qc4c2 Qh4h2+ Kg1f2 Qh2h4+
18/5 00:00 419.247 521.451 0,00 Qc4b4 Qh4h1+ Kg1f2 Qh1h4+
18/13 00:00 419.247 521.451 0,00 Qc4c7 Qh4h2+ Kg1f2 Qh2h4+
18/31 00:00 419.247 521.451 0,00 Qc4d5 Qh4h1+ Kg1f2 Qh1h4+ Kf2e2 Qh4g4+ Ke2e1 Qg4g3+ Ke1d1 Qg3g4+ Kd1d2 Qg4xg2+ Kd2c3 Kg8h8 Rf1e1 Ra8c8+ Kc3b4 Na5c4 Qd5xb7 Rc8e8
---------------------------------------------------------------------------
19/27 00:01 553.305 523.963 0,00 Qc4a4 Qh4h2+ Kg1f2 Rh6h3 Ne6g5 Qh2g3+ Kf2g1 Qg3h2+
19/5 00:01 553.305 523.963 0,00 Qc4c2 Qh4h2+ Kg1f2 Qh2h4+
19/7 00:01 553.305 523.963 0,00 Qc4c3 Qh4h2+ Kg1f2 Qh2h4+
19/5 00:01 553.305 523.963 0,00 Qc4b4 Qh4h1+ Kg1f2 Qh1h4+
19/7 00:01 553.305 523.963 0,00 Qc4c5 Qh4h1+ Kg1f2 Qh1h4+
19/5 00:01 553.305 523.963 0,00 Qc4c7 Qh4h2+ Kg1f2 Qh2h4+
19/31 00:01 553.305 523.963 +0,02 Qc4d5 Qh4h1+ Kg1f2 Qh1h4+ Kf2e2 Qh4g4+ Ke2e1 Qg4g3+ Ke1d1 Qg3g4+ Kd1d2 Qg4xg2+ Kd2c3 Kg8h8 Rf1e1 Ra8c8+ Kc3b4 Na5c4 Qd5xb7 Nc4d6 Re1e2 Nd6xb7 Re2xg2 Rh6xe6 b2b3 Re6b6+ Kb4a4
---------------------------------------------------------------------------
20/6 00:01 661.441 544.395 0,00 Qc4c2 Qh4h2+ Kg1f2 Qh2h4+ Kf2g1
20/10 00:01 661.441 544.395 0,00 Qc4a4 Qh4h2+ Kg1f2 Rh6h3 Ne6g5 Qh2g3+ Kf2g1 Qg3h2+ Kg1f2
20/5 00:01 661.441 544.844 0,00 Qc4c7 Qh4h2+ Kg1f2 Qh2h4+
20/5 00:01 661.441 544.844 0,00 Qc4b4 Qh4h1+ Kg1f2 Qh1h4+
20/6 00:01 661.441 544.844 0,00 Qc4c3 Qh4h2+ Kg1f2 Qh2h4+ Kf2g1
20/6 00:01 661.441 544.844 0,00 Qc4c5 Qh4h1+ Kg1f2 Qh1h4+ Kf2g1
20/48 00:01 661.441 544.844 +0,09 Qc4d5 Qh4h1+ Kg1f2 Qh1h4+ Kf2e2 Qh4g4+ Ke2d2 Qg4xg2+ Kd2c3 Kg8h8 Rf1e1 Ra8c8+ Kc3b4 Na5c4 Qd5xb7 a6a5+ Kb4a4 Nc4d6 Re1e2 Qg2g6 Qb7xg7+ Qg6xg7 Ne6xg7 Rc8c4+ b2b4 Rc4xb4+ Ka4xa5 Rb4b7 Ka5a6 Rb7b8 d4d5 Kh8xg7 Bc1b2+ Rb8xb2 Re2xb2 Nd6c4+ Ka6b7 Nc4xb2 a2a4 Nb2c4
---------------------------------------------------------------------------
21/5 00:02 1.165.130 563.409 0,00 Qc4c2 Qh4h2+ Kg1f2 Qh2h4+
21/9 00:02 1.165.130 563.409 0,00 Qc4a4 Qh4h2+ Kg1f2 Rh6h3 Ne6g5 Qh2g3+ Kf2g1 Qg3h2+
21/5 00:02 1.165.130 563.409 0,00 Qc4c7 Qh4h2+ Kg1f2 Qh2h4+
21/7 00:02 1.165.130 563.409 0,00 Qc4c3 Qh4h2+ Kg1f2 Qh2h4+
21/7 00:02 1.165.130 563.409 0,00 Qc4b4 Qh4h1+ Kg1f2 Qh1h4+ Kf2g1
21/5 00:02 1.165.130 563.409 0,00 Qc4c5 Qh4h2+ Kg1f2 Qh2h4+
21/54 00:02 1.165.130 563.409 +0,03 Qc4d5 Qh4h1+ Kg1f2 Qh1h4+ Kf2e2 Qh4g4+ Ke2e1 Qg4g3+ Ke1d2 Qg3xg2+ Kd2c3 Kg8h8 Rf1e1 Ra8c8+ Kc3b4 Na5c4 Qd5xb7 Nc4d6 Re1e2 Nd6xb7 Re2xg2 Rh6xe6 b2b3 g7g6 Bc1d2
---------------------------------------------------------------------------
22/6 00:02 1.324.542 563.634 0,00 Qc4c2 Qh4h2+ Kg1f2 Qh2h4+ Kf2g1
22/5 00:02 1.324.542 563.634 0,00 Qc4c7 Qh4h1+ Kg1f2 Qh1h4+
22/9 00:02 1.324.542 563.634 0,00 Qc4a4 Qh4h2+ Kg1f2 Rh6h3 Ne6g5 Qh2g3+ Kf2g1 Qg3h2+
22/9 00:02 1.324.542 563.634 0,00 Qc4c3 Qh4h2+ Kg1f2 Qh2h4+ Kf2g1
22/7 00:02 1.324.542 563.634 0,00 Qc4b4 Qh4h1+ Kg1f2 Qh1h4+
22/5 00:02 1.324.542 563.634 0,00 Qc4c5 Qh4h2+ Kg1f2 Qh2h4+
22/69 00:02 1.324.542 563.634 +0,10 Qc4d5 Qh4h1+ Kg1f2 Qh1h4+ Kf2e2 Qh4g4+ Ke2e1 Qg4g3+ Ke1d2 Qg3xg2+ Kd2c3 Kg8h8 Rf1e1 Ra8c8+ Kc3b4 Na5c4 Qd5xb7 Nc4d6 Re1e2 Nd6xb7 Re2xg2 Rh6xe6 b2b3 g7g6 Kb4a4 Kh8g8 Bc1b2 Re6c6 b3b4 Rc6c2 Rg2xc2 Rc8xc2 Ka4b3 Rc2e2 d4d5 Re2xe3+ Kb3c4 Re3e2
---------------------------------------------------------------------------
23/5 00:04 2.513.941 596.427 0,00 Qc4c2 Qh4h2+ Kg1f2 Qh2h4+
23/26 00:04 2.513.941 596.427 0,00 Qc4a4 Qh4h2+ Kg1f2 Rh6h3 Ne6g5 Qh2g3+ Kf2g1 Qg3h2+
23/9 00:04 2.513.941 596.427 0,00 Qc4c7 Qh4h1+ Kg1f2 Qh1h4+
23/5 00:04 2.513.941 596.427 0,00 Qc4c3 Qh4h2+ Kg1f2 Qh2h4+
23/7 00:04 2.513.941 596.427 0,00 Qc4b4 Qh4h1+ Kg1f2 Qh1h4+
23/5 00:04 2.513.941 596.427 0,00 Qc4c5 Qh4h2+ Kg1f2 Qh2h4+
23/57 00:04 2.513.941 596.427 +0,23 Qc4d5 Qh4h1+ Kg1f2 Qh1h4+ Kf2e2 Qh4g4+ Ke2e1 Qg4g3+ Ke1d2 Qg3xg2+ Kd2c3 Kg8h8 Rf1e1 Ra8c8+ Kc3b4 Na5c4 Qd5xb7 Nc4d6 Re1e2 Nd6xb7 Re2xg2 Rh6xe6 b2b3 Re6d6
---------------------------------------------------------------------------
24/9 00:05 3.304.844 594.931 0,00 Qc4a4 Qh4h2+ Kg1f2 Rh6h3 Ne6g5 Qh2g3+ Kf2g1 Qg3h2+
24/6 00:05 3.304.844 595.038 0,00 Qc4c2 Qh4h2+ Kg1f2 Qh2h4+ Kf2g1
24/5 00:05 3.304.844 595.038 0,00 Qc4c3 Qh4h2+ Kg1f2 Qh2h4+
24/8 00:05 3.304.844 595.038 0,00 Qc4b4 Qh4h1+ Kg1f2 Qh1h4+
24/5 00:05 3.304.844 595.038 0,00 Qc4c5 Qh4h2+ Kg1f2 Qh2h4+
24/15 00:05 3.304.844 595.038 0,00 Qc4c7 Qh4h1+ Kg1f2 Qh1h4+ Kf2g1
24/55 00:05 3.304.844 595.038 +0,33 Qc4d5 Qh4h1+ Kg1f2 Qh1h4+ Kf2e2 Qh4g4+ Ke2d2 Qg4xg2+ Kd2c3 Kg8h8 Rf1e1 Ra8c8+ Kc3b4 Na5c4 Qd5xb7 Nc4d6 Re1e2 Nd6xb7 Re2xg2 Rh6xe6 b2b3 Kh8g8 Kb4a4 Re6d6
---------------------------------------------------------------------------
25/9 00:06 4.088.112 600.486 0,00 Qc4a4 Qh4h2+ Kg1f2 Rh6h3 Ne6g5 Qh2g3+ Kf2g1 Qg3h2+
25/5 00:06 4.088.112 600.486 0,00 Qc4c5 Qh4h2+ Kg1f2 Qh2h4+
25/6 00:06 4.088.112 600.486 0,00 Qc4c3 Qh4h2+ Kg1f2 Qh2h4+ Kf2g1
25/6 00:06 4.088.112 600.486 0,00 Qc4c2 Qh4h2+ Kg1f2 Qh2h4+ Kf2g1
25/7 00:06 4.088.112 600.486 0,00 Qc4b4 Qh4h1+ Kg1f2 Qh1h4+ Kf2g1
25/6 00:06 4.088.112 600.486 0,00 Qc4c7 Qh4h1+ Kg1f2 Qh1h4+ Kf2g1
25/46 00:06 4.088.112 600.486 +0,33 Qc4d5 Qh4h1+ Kg1f2 Qh1h4+ Kf2e2 Qh4g4+ Ke2d2 Qg4xg2+ Kd2c3 Kg8h8 Rf1e1 Ra8c8+ Kc3b4 Na5c4 Qd5xb7 Nc4d6 Re1e2 Nd6xb7 Re2xg2 Rh6xe6 b2b3 Kh8g8 Kb4a4 Re6b6 Rg2g1
---------------------------------------------------------------------------
26/10 00:10 6.224.992 615.300 0,00 Qc4a4 Qh4h2+ Kg1f2 Rh6h3 Ne6g5 Qh2g3+ Kf2g1 Qg3h2+ Kg1f2
26/6 00:10 6.224.992 615.300 0,00 Qc4c5 Qh4h2+ Kg1f2 Qh2h4+ Kf2g1
26/8 00:10 6.224.992 615.300 0,00 Qc4c3 Qh4h2+ Kg1f2 Qh2h4+ Kf2e2 Qh4g4+ Ke2f2
26/5 00:10 6.224.992 615.300 0,00 Qc4c2 Qh4h2+ Kg1f2 Qh2h4+
26/10 00:10 6.224.992 615.300 0,00 Qc4b4 Qh4h1+ Kg1f2 Qh1h4+ Kf2e2 Qh4g4+ Ke2f2
26/6 00:10 6.224.992 615.300 0,00 Qc4c7 Qh4h1+ Kg1f2 Qh1h4+ Kf2g1
26/64 00:10 6.224.992 615.300 +0,33 Qc4d5 Qh4h2+ Kg1f2 Qh2h4+ g2g3 Qh4h2+ Kf2e1 Qh2xg3+ Ke1d1 Qg3g4+ Kd1d2 Qg4g2+ Kd2c3 Kg8h8 Rf1e1 Ra8c8+ Kc3b4 Na5c4 Qd5xb7 Nc4d6 Re1e2 Nd6xb7 Re2xg2 Rh6xe6 b2b3 Kh8g8 Kb4a4 g7g6 Rg2h2
---------------------------------------------------------------------------
27/9 00:11 7.019.168 618.865 0,00 Qc4a4 Qh4h2+ Kg1f2 Rh6h3 Ne6g5 Qh2g3+ Kf2g1 Qg3h2+
27/5 00:11 7.019.168 618.865 0,00 Qc4c3 Qh4h2+ Kg1f2 Qh2h4+
27/8 00:11 7.019.168 618.865 0,00 Qc4c5 Qh4h2+ Kg1f2 Qh2h4+ Kf2e2 Qh4g4+ Ke2f2
27/6 00:11 7.019.168 618.865 0,00 Qc4c2 Qh4h2+ Kg1f2 Qh2h4+ Kf2g1
27/7 00:11 7.019.168 618.865 0,00 Qc4b4 Qh4h1+ Kg1f2 Qh1h4+ Kf2g1
27/6 00:11 7.019.168 618.865 0,00 Qc4c7 Qh4h1+ Kg1f2 Qh1h4+ Kf2g1
27/61 00:11 7.019.168 618.865 +0,30 Qc4d5 Qh4h2+ Kg1f2 Qh2h4+ Kf2e2 Qh4g4+ Ke2d2 Qg4xg2+ Kd2c3 Kg8h8 Rf1e1 Ra8c8+ Kc3b4 Na5c4 Qd5xb7 Nc4d6 Re1e2 Nd6xb7 Re2xg2 Rh6xe6 b2b3 Kh8g8 Kb4a4 Re6c6 Bc1b2 g7g6 Ra1h1 Rc6c2 Rg2h2
---------------------------------------------------------------------------
28/9 00:25 15.801.465 630.117 0,00 Qc4a4 Qh4h2+ Kg1f2 Rh6h3 Ne6g5 Qh2g3+ Kf2g1 Qg3h2+
28/6 00:25 15.801.465 630.117 0,00 Qc4c3 Qh4h2+ Kg1f2 Qh2h4+ Kf2g1
28/6 00:25 15.801.465 630.117 0,00 Qc4c5 Qh4h2+ Kg1f2 Qh2h4+ Kf2g1
28/6 00:25 15.801.465 630.117 0,00 Qc4c2 Qh4h2+ Kg1f2 Qh2h4+ Kf2g1
28/7 00:25 15.801.465 630.117 0,00 Qc4b4 Qh4h1+ Kg1f2 Qh1h4+ Kf2g1
28/5 00:25 15.801.465 630.117 0,00 Qc4c7 Qh4h1+ Kg1f2 Qh1h4+
28/63 00:25 15.801.465 630.117 +1,40 Qc4d5 Qh4h2+ Kg1f2 Qh2h4+ Kf2e2 Qh4g4+ Ke2e1 Qg4g3+ Rf1f2 Rh6h1+ Ke1e2 Qg3g4+ Ke2d2 Qg4d1+ Kd2c3 Qd1d3+ Kc3b4 Na5c6+ Kb4c5 Qd3b5+ Kc5d6 Qb5b4+ Qd5c5 Qb4e1 Kd6c7 Rh1h6 b2b3
---------------------------------------------------------------------------
29/10 00:54 32.892.770 607.864 0,00 Qc4a4 Qh4h2+ Kg1f2 Rh6h3 Ne6g5 Qh2g3+ Kf2g1 Qg3h2+ Kg1f2
29/6 00:54 32.892.770 607.864 0,00 Qc4c3 Qh4h2+ Kg1f2 Qh2h4+ Kf2g1
29/5 00:54 32.892.770 607.864 0,00 Qc4b4 Qh4h1+ Kg1f2 Qh1h4+
29/6 00:54 32.892.770 607.864 0,00 Qc4c2 Qh4h2+ Kg1f2 Qh2h4+ Kf2g1
29/7 00:54 32.892.770 607.864 0,00 Qc4c5 Qh4h2+ Kg1f2 Qh2h4+
29/6 00:54 32.892.770 607.864 0,00 Qc4c7 Qh4h1+ Kg1f2 Qh1h4+ Kf2g1
29/77 00:54 32.892.770 607.864 +2,00 Qc4d5 Qh4h1+ Kg1f2 Qh1h4+ Kf2e2 Qh4g4+ Ke2e1 Qg4g3+ Rf1f2 Rh6h1+ Ke1e2 Qg3g4+ Ke2d2 Qg4d1+ Kd2c3 Qd1d3+ Kc3b4 Na5c6+ Kb4c5 Qd3b5+ Kc5d6 Qb5xd5+ Kd6xd5 Nc6b4+ Kd5d6 a6a5 a2a3 Ra8a6+ Kd6d7 Nb4d5 g2g4
---------------------------------------------------------------------------
30/5 01:00 36.503.179 605.801 0,00 Qc4c3 Qh4h2+ Kg1f2 Qh2h4+
30/10 01:00 36.503.179 605.801 0,00 Qc4a4 Qh4h2+ Kg1f2 Rh6h3 Ne6g5 Qh2g3+ Kf2g1 Qg3h2+ Kg1f2
30/5 01:00 36.503.179 605.801 0,00 Qc4c5 Qh4h2+ Kg1f2 Qh2h4+
30/9 01:00 36.503.179 605.801 0,00 Qc4b4 Qh4h1+ Kg1f2 Qh1h4+ Kf2g1
30/6 01:00 36.503.179 605.801 0,00 Qc4c7 Qh4h1+ Kg1f2 Qh1h4+ Kf2g1
30/6 01:00 36.503.179 605.801 0,00 Qc4c2 Qh4h2+ Kg1f2 Qh2h4+ Kf2g1
30/83 01:00 36.503.179 605.801 +2,07 Qc4d5 Qh4h2+ Kg1f2 Qh2h4+ Kf2e2 Qh4g4+ Ke2e1 Qg4g3+ Rf1f2 Rh6h1+ Ke1e2 Qg3g4+ Ke2d2 Qg4d1+ Kd2c3 Qd1d3+ Kc3b4 Na5c6+ Kb4c5 Qd3b5+ Kc5d6 Qb5xd5+ Kd6xd5 Nc6b4+ Kd5d6 a6a5 a2a3 Ra8a6+ Kd6d7 Nb4d5 Ne6c7 a5a4
---------------------------------------------------------------------------
31/38 01:04 38.711.643 602.572 0,00 Qc4b4 Qh4h2+ Kg1f2 Rh6h3 Ne6g5 Qh2g3+ Kf2e2 Rh3h2 Rf1f2 Rh2xg2 Rf2xg2 Qg3xg2+ Ke2e1 Qg2g1+ Ke1d2 Ra8c8 Qb4xa5 b7b5 Kd2e2 h7h6 Bc1d2 Qg1g2+ Ke2e1 h6xg5 Qa5xa6 Qg2g3+ Ke1f1 Qg3f3+ Kf1e1 Qf3g3+
31/35 01:04 38.711.643 602.572 0,00 Qc4c3 Qh4h2+ Kg1f2 Qh2h4+
31/6 01:04 38.711.643 602.572 0,00 Qc4c7 Qh4h1+ Kg1f2 Qh1h4+ Kf2g1
31/6 01:04 38.711.643 602.572 0,00 Qc4c2 Qh4h1+ Kg1f2 Qh1h4+
31/5 01:04 38.711.643 602.572 0,00 Qc4c5 Qh4h2+ Kg1f2 Qh2h4+
31/10 01:04 38.711.643 602.572 0,00 Qc4a4 Qh4h2+ Kg1f2 Rh6h3 Ne6g5 Qh2g3+ Kf2g1 Qg3h2+ Kg1f2
31/78 01:04 38.711.643 602.572 +1,97 Qc4d5 Qh4h2+ Kg1f2 Qh2h4+ Kf2e2 Qh4g4+ Ke2e1 Qg4g3+ Rf1f2 Rh6h1+ Ke1e2 Qg3g4+ Ke2d2 Qg4d1+ Kd2c3 Qd1d3+ Kc3b4 Na5c6+ Kb4c5 Qd3b5+ Kc5d6 Qb5xd5+ Kd6xd5 Nc6b4+ Kd5d6 a6a5 a2a3 Ra8a6+ Kd6d7 Nb4d5 Ne6c7 Nd5f6+ Kd7c8 Ra6b6
---------------------------------------------------------------------------
32/39 01:15 44.649.783 594.513 0,00 Qc4b4 Qh4h2+ Kg1f2 Rh6h3 Ne6g5 Qh2g3+ Kf2e2 Rh3h2 Rf1f2 Rh2xg2 Rf2xg2 Qg3xg2+ Ke2e1 Qg2g1+ Ke1d2 Ra8c8 Qb4xa5 b7b5 Kd2e2 h7h6 Bc1d2 Qg1g2+ Ke2e1 h6xg5 Qa5xa6 Qg2g3+ Ke1f1 Qg3f3+ Kf1e1 Qf3g3+
32/6 01:15 44.649.783 594.513 0,00 Qc4c3 Qh4h2+ Kg1f2 Qh2h4+ Kf2g1
32/6 01:15 44.649.783 594.513 0,00 Qc4c7 Qh4h1+ Kg1f2 Qh1h4+ Kf2g1
32/7 01:15 44.649.783 594.513 0,00 Qc4c5 Qh4h2+ Kg1f2 Qh2h4+
32/9 01:15 44.649.783 594.513 0,00 Qc4a4 Qh4h2+ Kg1f2 Rh6h3 Ne6g5 Qh2g3+ Kf2g1 Qg3h2+
32/52 01:15 44.649.783 594.513 0,00 Qc4c2 Qh4h1+ Kg1f2 Qh1h4+ Kf2g1
32/84 01:15 44.649.783 594.513 +1,93 Qc4d5 Qh4h2+ Kg1f2 Qh2h4+ Kf2e2 Qh4g4+ Ke2e1 Qg4g3+ Rf1f2 Rh6h1+ Ke1e2 Qg3g4+ Ke2d2 Qg4d1+ Kd2c3 Qd1d3+ Kc3b4 Na5c6+ Kb4c5 Qd3b5+ Kc5d6 Qb5xd5+ Kd6xd5 Nc6b4+ Kd5d6 a6a5 a2a3 Ra8a6+ Kd6d7 Nb4d5 Ne6c7 Nd5f6+ Kd7d8 Ra6d6+ Kd8c8 Rd6e6
---------------------------------------------------------------------------
33/8 03:17 115.376.529 585.168 0,00 Qc4b4 Ra8c8 Bc1d2 Qh4h1+ Kg1f2 Qh1h4+ Kf2g1
33/5 03:17 115.376.529 585.171 0,00 Qc4c3 Qh4h2+ Kg1f2 Qh2h4+
33/9 03:17 115.376.529 585.171 0,00 Qc4a4 Qh4h2+ Kg1f2 Rh6h3 Ne6g5 Qh2g3+ Kf2g1 Qg3h2+
33/6 03:17 115.376.529 585.171 0,00 Qc4c5 Qh4h2+ Kg1f2 Qh2h4+ Kf2g1
33/15 03:17 115.376.529 585.171 0,00 Qc4c7 Qh4h1+ Kg1f2 Qh1h4+ Kf2g1
33/61 03:17 115.376.529 585.171 0,00 Qc4c2 Qh4h2+ Kg1f2 Qh2h4+
33/97 03:17 115.376.529 585.171 +2,43 Qc4d5 Qh4h2+ Kg1f2 Qh2h4+ Kf2e2 Qh4g4+ Ke2e1 Qg4g3+ Rf1f2 Rh6h1+ Ke1e2 Qg3g4+ Ke2d2 Qg4d1+ Kd2c3 Qd1d3+ Kc3b4 Na5c6+ Kb4c5 Qd3b5+ Kc5d6 Qb5b4+ Qd5c5 Qb4e1 Kd6c7 Rh1h6 d4d5 Qe1xf2 Kc7xb7 Rh6xe6 d5xe6 Kg8h8
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34/5 03:43 129.712.972 581.570 0,00 Qc4c3 Qh4h2+ Kg1f2 Qh2h4+
34/9 03:43 129.712.972 581.570 0,00 Qc4a4 Qh4h2+ Kg1f2 Rh6h3 Ne6g5 Qh2g3+ Kf2g1 Qg3h2+
34/5 03:43 129.712.972 581.570 0,00 Qc4c5 Qh4h2+ Kg1f2 Qh2h4+
34/9 03:43 129.712.972 581.570 0,00 Qc4b4 Ra8c8 Bc1d2 Qh4h1+ Kg1f2 Qh1h4+
34/8 03:43 129.712.972 581.570 0,00 Qc4c7 Qh4h1+ Kg1f2 Qh1h4+ Kf2e2 Qh4g4+ Ke2f2
34/5 03:43 129.712.972 581.570 0,00 Qc4c2 Qh4h2+ Kg1f2 Qh2h4+
34/80 03:43 129.712.972 581.570 +2,54 Qc4d5 Qh4h2+ Kg1f2 Qh2h4+ Kf2e2 Qh4g4+ Ke2e1 Qg4g3+ Rf1f2 Rh6h1+ Ke1e2 Qg3g4+ Ke2d2 Qg4d1+ Kd2c3 Qd1d3+ Kc3b4 Na5c6+ Kb4c5 Qd3b5+ Kc5d6 Qb5b4+ Qd5c5 Qb4e1 Kd6c7 Rh1h6 d4d5 Qe1xf2 Kc7xb7 Rh6xe6 d5xe6 Ra8b8+ Kb7c7 h7h6This thread is smothered checkmate related. When was this checkmate pattern first recorded? The Wikipedia article surprised me, pointing to the Lucena's book of 1497. YACPDB helped me to identify the problem as checkmate in five moves and I finally found the problem with solution at page 132 of this copy of the book. We can see 'light on right' that early, but the notation is verbous. Each diagramme has got some letters (A, B, C, ...) on key squares of the solutions. For example, in that early smothered mate problem, A=e6 (queen to A, giving check), B=f7, C=h6, D=g8 and E=f7 again, this is, pieces moving to A, B and so on [Qe6+, Nf7+, Nh6+ ('discovered check' as written in the book), Qg8+ and Nf7#]. The diagramme also marks d8 square as I, giving other option: 3.- Nd8+ (knight to I) instead of 3.- Nh6+, followed by 4.- Qe8+, Qf8; 5.- Qxf8#.
[d]rr4k1/6pp/2Q5/3KN3/8/q7/8/8 w - - 0 1
Regards from Spain.
Ajedrecista.