Checkmate in ...?

Ajedrecista · Post by **Ajedrecista** » Wed Oct 16, 2024 8:18 pm

Hello:

I won a game today that featured an early queen trap/fork that finished with a checkmate some moves later:

https://lichess.org/oUTxPxoD#black

[pgn][Event "Casual blitz game"]
[Site "https://lichess.org/oUTxPxoD"]
[Date "2024.10.16"]
[White "Anonymous"]
[Black "Anonymous"]
[Result "0-1"]
[UTCDate "2024.10.16"]
[UTCTime "15:58:42"]
[WhiteElo "?"]
[BlackElo "?"]
[Variant "Standard"]
[TimeControl "300+0"]
[ECO "D00"]
[Opening "Queen's Pawn Game: Stonewall Attack"]
[Termination "Normal"]
[Annotator "lichess.org"]

1. d4 d5 2. e3 Nf6 3. Bd3 { D00 Queen's Pawn Game: Stonewall Attack } e6 4. h3 Be7 5. g4 O-O 6. g5 Nfd7 7. h4 c5 8. c3 c4 9. Bc2 Nc6 10. Nf3 e5 11. Nxe5 Ndxe5 12. dxe5 Nxe5 13. Qh5 g6 14. Qe2 Bg4 15. Qd2 Nf3+ 16. Ke2 Nxd2+ 17. Kxd2 f6 18. f4 fxg5 19. hxg5 Bf3 20. Rf1 Be4 21. Bxe4 dxe4+ 22. Ke2 Qd3+ 23. Kf2 h6 24. gxh6 Bh4+ 25. Kg2 Qe2+ 26. Kh3 Qxf1+ 27. Kxh4 Rf5 28. Nd2 Rh5+ 29. Kg3 Rh3+ 30. Kg4 Qg2# { Black wins by checkmate. } 0-1[/pgn]

Although 23.- ..., h6 was not the best move eval-wise, I had in mind 24.- gxh6 (not forced), Bh4+, which luckily happened in the game. Later, I wondered about the fastest checkmate and I think that a good candidate starting point is from 21.- ..., dxe4+:

[d]r2q1rk1/pp2b2p/6p1/6P1/2p1pP2/2P1P3/PP1K4/RNB2R2 w - - 0 22

Code: Select all

FEN: r2q1rk1/pp2b2p/6p1/6P1/2p1pP2/2P1P3/PP1K4/RNB2R2 w - - 0 22

I got a checkmate in 12 moves:

Huntsman:
classical evaluation enabled
[...]
 53/27	02:29	 450.401.451	3.005.140	-M13	Kd2e1 Qd8d3 Rf1f2 Be7xg5 Rf2d2 Qd3xe3+ Ke1d1 Rf8xf4 b2b3 Rf4f1+ Kd1c2 Rf1xc1+ Kc2xc1 Ra8d8 Kc1b2 Rd8xd2+ Nb1xd2 Qe3xd2+ Kb2a3 Bg5e7+ Ka3a4 Qd2xc3 a2a3 Qc3xb3+ Ka4a5 Be7d8+
 54/27	02:49	 511.286.957	3.009.854	-M12	Kd2e1 Qd8d3 Rf1f2 Ra8d8 Bc1d2 Rf8xf4 Rf2xf4 Be7xg5 Rf4f2 Bg5h4 Ke1d1 Bh4xf2 a2a4 Bf2xe3 Kd1c1 Be3xd2+ Nb1xd2 Qd3xd2+ Kc1b1 Qd2d1+ Kb1a2 Qd1xa4+ Ka2b1 Rd8d1+
[...]
 79/25	12:41	2.118.355.185	2.781.472	-M12	Kd2e1 Qd8d3 Rf1f2 Ra8d8 Bc1d2 Rf8xf4 Rf2xf4 Be7xg5 Rf4f2 Bg5h4 Ke1d1 Bh4xf2 a2a4 Bf2xe3 Kd1c1 Be3xd2+ Nb1xd2 Qd3xd2+ Kc1b1 Qd2d1+ Kb1a2 Qd1xa4+ Ka2b1 Rd8d1+

[pgn][Event ""]
[Site ""]
[Date ""]
[White ""]
[Black ""]
[Result "0-1"]
[SetUp "1"]
[FEN "r2q1rk1/pp2b2p/6p1/6P1/2p1pP2/2P1P3/PP1K4/RNB2R2 w - - 0 22"]
[Result "0-1"]

22. Ke1 Qd3 23. Rf2 Rad8 24. Bd2 Rxf4 25. Rxf4 Bxg5 26. Rf2 Bh4 27. Kd1 Bxf2 28. a4 Bxe3 29. Kc1 Bxd2+ 30. Nxd2 Qxd2+ 31. Kb1 Qd1+ 32. Ka2 Qxa4+ 33. Kb1 Rd1# 0-1[/pgn]

Is there a faster checkmate?

Regards from Spain.

Ajedrecista.

peter · Post by **peter** » Wed Oct 16, 2024 11:40 pm

Ajedrecista wrote: ↑Wed Oct 16, 2024 8:18 pm[pgn][Event ""]
[Site ""]
[Date ""]
[White ""]
[Black ""]
[Result "0-1"]
[SetUp "1"]
[FEN "r2q1rk1/pp2b2p/6p1/6P1/2p1pP2/2P1P3/PP1K4/RNB2R2 w - - 0 22"]
[Result "0-1"]

22. Ke1 Qd3 23. Rf2 Rad8 24. Bd2 Rxf4 25. Rxf4 Bxg5 26. Rf2 Bh4 27. Kd1 Bxf2 28. a4 Bxe3 29. Kc1 Bxd2+ 30. Nxd2 Qxd2+ 31. Kb1 Qd1+ 32. Ka2 Qxa4+ 33. Kb1 Rd1# 0-1[/pgn]

Is there a faster checkmate?

Guess not.
After some forward- backward with 30 threads of 16x3.5GHz- CPU and 32 G hash, MultiPV=2:

r2q1rk1/pp2b2p/6p1/6P1/2p1pP2/2P1P3/PP1K4/RNB2R2 w - -

Engine: The Huntsman 10 (32768 MB)
von the Stockfish developers (see AUTHORS f

95 17:27 -M12 1.Ke1 Dd3 2.Tf2 Tad8 3.Ld2 Lxg5
4.Te2 Tf5 5.Sa3 Lxf4 6.exf4 Th5
7.Le3 Th1+ 8.Kf2 Th2+ 9.Kg3 Dxe2
10.f5 Dg2+ 11.Kf4 Df3+ 12.Ke5 Dxf5+ (35.816.626.288) 34195

95 17:27 -M11 1.Ke2 Dd3+ 2.Ke1 Lc5 3.b4 Lxe3
4.Lxe3 Dxe3+ 5.Kd1 Txf4 6.Kc2 Txf1
7.Sd2 Txa1 8.Sxc4 De2+ 9.Sd2 Dd1+
10.Kb2 Dxd2+ 11.Kxa1 Dc1+ (35.816.626.288) 34195

Eelco de Groot · Post by **Eelco de Groot** » Thu Oct 17, 2024 9:14 am

Hi guys, some more checkmates if you play play the computer's move 18...Bc5 I think most computers will play, I tried Rebel-Extreme and an old version of Crystal here.

Then I get a line 18...Bc5 19. Ke1 Qb6 but it has not been backward checked:

[d]r4rk1/pp5p/1q3pp1/2bp2P1/2p2PbP/2P1P3/PPB5/RNB1K2R w - - 3 20

Here old version of Crystal will give, I think it is close to optimum already:

[d]r4rk1/pp5p/1q3pp1/2bp2P1/2p2PbP/2P1P3/PPB5/RNB1K2R w - -

Engine: Crystal 5 KWK (1024 MB)
gemaakt door the Stockfish developers (see AUTHORS f

41 402:35 -M17 20.Ld1 Lxe3 21.Lxg4 Lxc1 22.Kd1 Lxf4
23.Tf1 fxg5 24.b3 De3 25.Kc2 De4+
26.Kb2 Lc1+ 27.Kxc1 Txf1+ 28.Kb2 Tf2+
29.Ka3 De7+ 30.Ka4 b5+ 31.Ka5 Dc7+
32.Kb4 Dd6+ 33.Ka5 (21.599.507.336) 894

41 402:35 -M17 20.Lf5 Lxe3 21.Lxg4 Lxc1 22.Kd1 Lxf4
23.Tf1 fxg5 24.b3 De3 25.Kc2 De4+
26.Kb2 Lc1+ 27.Kxc1 Txf1+ 28.Kb2 Tf2+
29.Ka3 De7+ 30.Ka4 b5+ 31.Ka5 Dc7+
32.Kb4 Dd6+ 33.Ka5 (21.599.507.336) 894

41 402:35 -M13 20.Tg1 Lxe3 21.Txg4 Lxc1 22.Pd2 De3+
23.Kf1 Tae8 24.Le4 Dxd2 25.f5 dxe4
26.Txc1 e3 27.Kg1 Df2+ 28.Kh1 e2
29.Tcg1 Te3 30.T4g3 Txg3 31.Txg3 Dxg3
32.fxg6 e1D+ (21.599.507.336) 894

41 402:35 -M13 20.Kf1 fxg5 21.Pd2 Lxe3 22.f5 Lxf5
23.Lxf5 Txf5+ 24.Ke1 Lxd2+ 25.Lxd2 Df2+
26.Kd1 Df3+ 27.Kc2 De4+ 28.Kd1 Dxh1+
29.Kc2 De4+ 30.Kd1 Tf1+ 31.Le1 Dxe1+
32.Kc2 Tf2+ (21.599.507.336) 894

The 20.Bd1 Bxe3 line it already had in its memory, after that it is

[d]r4rk1/pp5p/1q3pp1/3p2P1/2p2PbP/2P1b3/PP6/RNBBK2R w - -

Engine: Crystal 5 KWK (1024 MB)
gemaakt door the Stockfish developers (see AUTHORS f

35 20:02 -M16 21.Lxg4 Lxc1 22.Kd1 Lxf4 23.Tf1 fxg5
24.Kc2 De3 25.b3 De4+ 26.Kb2 Lc1+
27.Kxc1 Txf1+ 28.Kb2 Tf2+ 29.Le2 Dxe2+
30.Ka3 De7+ 31.Ka4 b5+ 32.Ka5 Dc5
33.hxg5 Db6+ 34.Kb4 (1.036.213.696) 861

35 20:02 -M11 21.b3 Lxc1 22.Lxg4 Lxf4 23.Kf1 De3
24.Th3 Lg3 25.Txg3 fxg5+ 26.Tf3 Txf3+
27.Lxf3 Dxf3+ 28.Kg1 Dg4+ 29.Kh2 Te8
30.bxc4 Te2+ 31.Kh1 Dg2+ (1.036.213.696) 861

35 20:02 -M11 21.b4 Lxc1 22.Lxg4 Lxf4 23.Pd2 De3+
24.Kf1 fxg5 25.Pf3 Dd3+ 26.Kg1 Le3+
27.Kg2 De2+ 28.Kh3 Txf3+ 29.Lxf3 Dxf3+
30.Kh2 g4 31.Thf1 Dh3+ (1.036.213.696) 861

35 20:02 -M11 21.Tf1 Lxc1 22.Lxg4 Tae8+ 23.Kd1 Dxb2
24.gxf6 Txf6 25.Te1 Txe1+ 26.Kxe1 Lxf4
27.Lh3 Dc2 28.Le6+ Kg7 29.Pd2 Dxd2+
30.Kf1 Lg3+ 31.Lf5 Df2+ (1.036.213.696) 861

so that seems consistent with best line one ply further up. For 20.Kf2 it had at iteration 40

40 366:16 -M14 20.Kf2 fxg5 21.f5 Lxf5 22.Lxf5 Txf5+ 23.Ke2 Lxe3 24.Lxe3 Te8 25.Th3 Dxb2+ 26.Pd2 Dxa1 27.Tf3 Dg1 28.Pe4 Txe4 29.Kd2 Dg2+ 30.Kd1 Txf3 31.Ld2 Td3 32.Kc2 Dxd2+ 33.Kb1 (19.495.027.425) 887

but that disappeared out of the list so here best Mate maybe a little shorter. And for 20.Bd2 it had

41 397:27 -M12 20.Ld2 Lxe3 21.Lf5 Lxd2+ 22.Kf1 De3
23.Le6+ Lxe6 24.Pxd2 fxg5 25.Th2 Txf4+
26.Kg2 Dxd2+ 27.Kh1 De3 28.Td2 Dxd2
29.Te1 Dxe1+ 30.Kg2 Df2+ 31.Kh1 Txh4+ (21.346.987.579) 895

First three moves put into Ajedrecista's commented pgn on Lichess:

[pgn][Event "Casual blitz game"]
[Site "https://lichess.org/oUTxPxoD"]
[Date "2024.10.16"]
[Round "?"]
[White "Anonymous"]
[Black "Anonymous"]
[Result "0-1"]
[ECO "D00"]
[UTCDate "2024.10.16"]
[UTCTime "15:58:42"]
[Variant "Standard"]
[TimeControl "300+0"]
[Opening "Queen's Pawn Game: Stonewall Attack"]
[Termination "Normal"]
[Annotator "lichess.org"]

1.d4
{[%eval 0.17] [%clk 0:05:00]}
1...d5
{[%eval 0.23] [%clk 0:05:00]}
2.e3
{[%eval 0.03] [%clk 0:04:58]}
2...Nf6
{[%eval 0.1] [%clk 0:04:59]}
3.Bd3
{[%eval -0.04] [%clk 0:04:56] D00 Queen's Pawn Game: Stonewall Attack}
3...e6
{[%eval 0.13] [%clk 0:04:57]}
4.h3
{[%eval -0.19] [%clk 0:04:54]}
4...Be7
{[%eval 0.04] [%clk 0:04:56]}
5.g4 $6
{(0.04 → -1.03) Inaccuracy. b3 was best. [%eval -1.03] [%clk 0:04:51]}
( 5.b3 O-O 6.Nf3 c5 7.Bb2 b6 8.O-O Nbd7 9.Nbd2 Bb7 )
5...O-O
{[%eval -0.69] [%clk 0:04:54]}
6.g5
{[%eval -0.73] [%clk 0:04:47]}
6...Nfd7
{[%eval -0.34] [%clk 0:04:51]}
7.h4 $6
{(-0.34 → -1.07) Inaccuracy. f4 was best. [%eval -1.07] [%clk 0:04:40]}
( 7.f4 c5 8.c3 Nc6 9.Nd2 cxd4 10.exd4 e5 11.fxe5 Bxg5 12.Ndf3 Bxc1 )
7...c5
{[%eval -0.58] [%clk 0:04:49]}
8.c3 $6
{(-0.58 → -1.28) Inaccuracy. f4 was best. [%eval -1.28] [%clk 0:04:34]}
( 8.f4 c4 )
8...c4 $6
{(-1.28 → -0.69) Inaccuracy. e5 was best. [%eval -0.69] [%clk 0:04:46]}
( 8...e5 9.Be2 )
9.Bc2
{[%eval -0.74] [%clk 0:04:27]}
9...Nc6
{[%eval -0.37] [%clk 0:04:45]}
10.Nf3 $2
{(-0.37 → -1.70) Mistake. Qf3 was best. [%eval -1.7] [%clk 0:03:48]}
( 10.Qf3 )
10...e5
{[%eval -1.67] [%clk 0:04:35]}
11.Nxe5 $6
{(-1.67 → -2.47) Inaccuracy. Nbd2 was best. [%eval -2.47] [%clk 0:03:47]}
( 11.Nbd2 b5 )
11...Ndxe5
{[%eval -2.5] [%clk 0:04:35]}
12.dxe5
{[%eval -2.48] [%clk 0:03:45]}
12...Nxe5
{[%eval -2.37] [%clk 0:04:34]}
13.Qh5 $4
{(-2.37 → -6.30) Blunder. Rg1 was best. [%eval -6.3] [%clk 0:03:42]}
( 13.Rg1 Bc5 14.Nd2 a5 15.Nf1 Re8 16.h5 a4 17.f4 Nc6 18.Kf2 Qc7 )
13...g6
{[%eval -5.94] [%clk 0:04:31]}
14.Qe2
{[%eval -6.63] [%clk 0:03:32]}
14...Bg4
{[%eval -6.47] [%clk 0:04:26]}
15.Qd2
{[%eval -6.76] [%clk 0:03:27]}
15...Nf3+
{[%eval -6.75] [%clk 0:04:24]}
16.Ke2
{[%eval -8.25] [%clk 0:03:24]}
16...Nxd2+
{[%eval -8.05] [%clk 0:04:22]}
17.Kxd2
{[%eval -7.98] [%clk 0:03:19]}
17...f6
{[%eval -7.47] [%clk 0:04:01]}
18.f4
{[%eval -8.77] [%clk 0:02:45]}
18...fxg5
{[%eval -8.62] [%clk 0:03:57]}
( 18...Bc5 19.Ke1 Qb6 {This might be a computer line, see analysis from Crystal and some Rebel - Extreme} )
19.hxg5
{[%eval -9.05] [%clk 0:02:44]}
19...Bf3
{[%eval -7.56] [%clk 0:03:47]}
20.Rf1
{[%eval -7.34] [%clk 0:02:37]}
20...Be4
{[%eval -7.55] [%clk 0:03:44]}
21.Bxe4
{[%eval -9.12] [%clk 0:02:30]}
21...dxe4+
{[%eval -8.79] [%clk 0:03:44]}
22.Ke2
{[%eval -8.79] [%clk 0:02:25]}
22...Qd3+
{[%eval -8.71] [%clk 0:03:37]}
23.Kf2
{[%eval -8.88] [%clk 0:02:23]}
23...h6
{[%eval -8.48] [%clk 0:02:39]}
24.gxh6 $2
{(-8.48 → Mate in 8) Checkmate is now unavoidable. a4 was best. [%eval #-8] [%clk 0:02:16]}
( 24.a4 Bxg5 25.Kg1 Qe2 26.Rf2 Qe1+ 27.Rf1 Qg3+ 28.Kh1 Qh3+ 29.Kg1 Rad8 )
24...Bh4+
{[%eval -11.2] [%clk 0:02:36]}
25.Kg2 $6
{(-11.20 → Mate in 6) Checkmate is now unavoidable. Kg1 was best. [%eval #-6] [%clk 0:02:04]}
( 25.Kg1 Kh7 26.Rf2 Qd1+ 27.Kg2 Bxf2 28.Kxf2 Qxc1 29.a3 Qxb2+ 30.Kg3 Qxa1 )
25...Qe2+
{[%eval #-5] [%clk 0:02:34]}
26.Kh3
{[%eval #-5] [%clk 0:01:55]}
26...Qxf1+
{[%eval #-4] [%clk 0:02:18]}
27.Kxh4
{[%eval #-4] [%clk 0:01:49]}
27...Rf5
{[%eval #-3] [%clk 0:02:11]}
28.Nd2
{[%eval #-2] [%clk 0:01:46]}
28...Rh5+
{[%eval #-1] [%clk 0:01:55]}
29.Kg3
{[%eval #-1] [%clk 0:01:41]}
29...Rh3+
{[%eval #-1] [%clk 0:01:35]}
30.Kg4
{[%eval #-1] [%clk 0:01:23]}
30...Qg2#
{[%clk 0:01:33] Black wins by checkmate.}
0-1
[/pgn]

Rebel - Extreme will play something like this, this is after analysis of position further down, so not what you will see if you get here with empty memory:

[d]r2q1rk1/pp2b2p/5pp1/3p2P1/2p2PbP/2P1P3/PPBK4/RNB4R b - -

Engine: Rebel-EXTREME SMP (1024 MB)
gemaakt door Ed Schroder and Chris Whittington (C) 2

18/43 0:01 -14.57++ 18...Lc5 (2.158.097)
.
.
.

27/56 1:34 -16.15 18...Lc5 19.Lxg6 hxg6 20.b4 d4
21.bxc5 dxe3+ 22.Kc2 Dd3+ 23.Kb2 De2+
24.Ka3 Tae8 25.f5 gxf5 26.Kb4 Dg2
27.Te1 f4 28.Ka3 f5 29.h5 Lxh5 30.g6 b6
31.c6 Dxc6 (104.776.558)

28/53 1:39 -16.25++ 18...Lc5 19.Te1 (110.160.920)

28/57 1:52 -16.35++ 18...Lc5 (123.941.653)

28/52 2:08 -16.27++ 18...Lc5 19.Te1 (142.010.405)

28/61 2:13 -16.32 18...Lc5 19.Lxg6 hxg6 20.b4 d4
21.bxc5 dxe3+ 22.Kc2 Dd3+ 23.Kb2 De2+
24.Ka3 Tae8 25.f5 gxf5 26.Kb4 Dg2
27.Te1 f4 28.gxf6 b6 29.c6 Dxc6
30.Ka3 Txf6 31.Tf1 e2 (147.543.736)

peter · Post by **peter** » Thu Oct 17, 2024 9:25 pm

Hi Eelco!

Added some more forward- backward- lines of Huntsman's:

[pgn][Event "Casual blitz game"]
[Site "lichess.org"]
[Date "2024.10.16"]
[Round "?"]
[White "Anonymous"]
[Black "Anonymous"]
[Result "0-1"]
[ECO "D00"]
[Annotator "Ajedrecista"]
[PlyCount "60"]
[EventDate "2024.??.??"]
[EventType "blitz"]
[TimeControl "300"]

1. d4 d5 2. e3 Nf6 3. Bd3 {D00 Queen's Pawn Game: Stonewall Attack} e6 4. h3 Be7 5. g4 O-O 6. g5 Nfd7 7. h4 c5 8. c3 c4 9. Bc2 Nc6 10. Nf3 e5 11. Nxe5 Ndxe5 12. dxe5 Nxe5 13. Qh5 g6 14. Qe2 Bg4 15. Qd2 Nf3+ 16. Ke2 Nxd2+ 17. Kxd2 f6 18. f4 fxg5 $5 (18... Bc5 {Eelco} 19. Ke1 (19. Bxg6 hxg6 20. b4 d4 21. bxc5 dxc3+ 22. Kxc3 Qa5+ 23. Kc2 Qa4+ 24. Kb2 Bf5 25. e4 Qb4+ 26. Kc2 Bxe4+ 27. Kd1 Rfe8 28. Be3 Bxh1 29. a3 Qb2 30. Nd2 Bf3+ 31. Nxf3 Rxe3 32. Nd2 Rd8 33. gxf6 Rxd2#) (19. Rh3 $6 Bxh3 20. Ke1 Qb6 21. Nd2 Bxe3 22. Nf3 Rfe8 23. Kd1 Bg4 24. Be4 Rxe4 25. gxf6 Bxc1 26. Kxc1 Re1+ 27. Nxe1 Qe3+ 28. Kc2 Qe2+ 29. Kc1 Qd1#) (19. Bd1 Bxe3+ 20. Ke1 Bxc1 21. Bxg4 Qb6 22. Kd1 Bxf4 23. Rf1 Qxb2 24. Rxf4 Rae8 25. Bf3 Re3 26. Bxd5+ Kh8 27. Rd4 Rfe8 28. Be4 R8xe4 29. Rd8+ Kg7 30. Rd7+ Kf8 31. Rd8+ Ke7 32. gxf6+ Kxd8 33. Nd2 Re1#) (19. Re1 $5 Re8 20. b4 d4 21. Bd1 Rxe3 22. bxc5 Rh3 23. Bb2 dxc3+ 24. Kc1 cxb2+ 25. Kxb2 Qd4+ 26. Kc1 Rh2 27. Be2 Re8 28. gxf6 Rexe2 29. f7+ Kxf7 30. Rxe2 Rh1+ 31. Kc2 Bf5+ 32. Re4 Bxe4#) 19... Qb6 20. Bd1 Bxe3 21. Bxg4 Bxc1 22. Kd1 Bxf4 23. Rf1 Qxb2 24. Rxf4 Rae8 25. Bf3 Re3 26. Bxd5+ Kh8 27. Rd4 Rd3+ 28. Ke1 Qc1+ 29. Kf2 fxg5+ 30. Rf4 Rxf4+ 31. Bf3 Rdxf3+ 32. Kg2 Qf1+ 33. Kh2 Rxh4#) 19. hxg5 $6 (19. Rg1 $5 gxf4 20. Bxg6 fxe3+ 21. Kc2 Rf2+ 22. Nd2 hxg6 23. Rxg4 Qf8 24. Rxg6+ Kh7 25. b4 exd2 26. Bxd2 Qf5+ 27. Kc1 Qxg6 28. a4 Qd3 29. Ra2 Rf1+ 30. Kb2 Qxd2+ 31. Ka3 Qxc3#) (19. b4 $5 d4 20. Be4 dxc3+ 21. Kc2 Bf3 22. Nxc3 Bxe4+ 23. Nxe4 Qd3+ 24. Kb2 c3+ 25. Kb3 Qd5+ 26. Kc2 Qxe4+ 27. Kb3 Rfd8 28. a3 Qd5+ 29. Kc2 Qd3+ 30. Kb3 c2+ 31. Ka2 Qc4+ 32. Kb2 Bf6#) (19. Bd1 d4 20. Bxg4 dxe3+ 21. Ke1 Qd5 22. Rh2 Qe4 23. Be2 Qxf4 24. Rh3 Qf2+ 25. Kd1 Rad8+ 26. Bd2 exd2 27. Rh1 Bc5 28. Bxc4+ Kg7 29. b3 Rfe8 30. Be6 Rxe6 31. c4 Qe2+ 32. Kc2 d1=Q+ 33. Kc3 Qdd3#) (19. b3 d4 20. Ba3 dxc3+ 21. Kc1 Qd5 22. e4 Qd4 23. Bxe7 Qe3+ 24. Nd2 Bf3 25. Kb1 Bxh1 26. Nf3 Bxf3 27. a4 Qd2 28. Ba3 Bxe4 29. Ra2 Rxf4 30. Rb2 cxb3 31. Ka1 cxb2+ 32. Bxb2 Qxc2 33. hxg5 Qb1#) (19. Bxg6 $6 hxg6 20. Rg1 d4 21. exd4 Bb4 22. b3 Rxf4 23. Kc2 Bf5+ 24. Kb2 Bxc3+ 25. Nxc3 Rf2+ 26. Bd2 Rxd2+ 27. Kc1 Qxd4 28. Rg3 Rc2+ 29. Kb1 Qd2 30. Rxg5 Rb2#) 19... Bf3 $6 (19... Rxf4 $1 20. Bf5 d4 21. Be6+ Bxe6 22. exf4 Qd5 23. Rh2 Qe4 24. Re2 Qxf4+ 25. Ke1 Qxc1+ 26. Kf2 Rf8+ 27. Kg2 Qf1+ 28. Kh2 Qxe2+ 29. Kg3 Qf2#) 20. Rf1 Be4 21. Bxe4 $6 (21. Kd1 Qb6 22. Bxe4 dxe4 23. Rf2 Rad8+ 24. Kc2 Rf5 25. b4 a5 26. a3 Rd3 27. Ra2 axb4 28. cxb4 Bxb4 29. Rb2 Qc6 30. Rxb4 c3 31. a4 Ra5 32. Rb3 Rc5 33. Ba3 Qxa4 34. Bxc5 Qa2+ 35. Kc1 Qxf2 36. Rxc3 Qe2 37. Rxd3 exd3 38. Nd2 Qe1+ 39. Kb2 Qxd2+ 40. Kb3 Qc2+ 41. Kb4 d2 42. Kb5 d1=Q 43. Kb6 Qd8+ 44. Kb5 Qd5 45. Kb4 Qdxc5#) 21... dxe4+ 22. Ke2 (22. Ke1 $1 Qd3 23. Rf2 Rad8 24. Bd2 Rxf4 (24... Bxg5 25. Re2 Rf5 26. Na3 Bxf4 27. exf4 Rh5 28. Be3 Rh1+ 29. Kf2 Rh2+ 30. Kg3 Qxe2 31. f5 Qg2+ 32. Kf4 Qf3+ 33. Ke5 Qxf5#) 25. Rxf4 Bxg5 26. Rf2 Bh4 27. Kd1 Bxf2 28. Kc1 Bxe3 29. b4 Bxd2+ 30. Kb2 Bc1+ 31. Kxc1 Qe2 32. Nd2 Rxd2 33. Rb1 Qd1# {1-0 2024}) 22... Qd3+ 23. Kf2 (23. Ke1 Bxg5 24. Bd2 Rxf4 25. Rxf4 Bxf4 26. Kd1 Bxe3 27. Kc1 Bxd2+ 28. Nxd2 Rd8 29. a4 Qxd2+ 30. Kb1 Qd1+ 31. Ka2 Qxa4+ 32. Kb1 Rd1#) 23... h6 24. gxh6 Bh4+ 25. Kg2 Qe2+ 26. Kh3 Qxf1+ 27. Kxh4 Rf5 28. Nd2 Rh5+ 29. Kg3 Rh3+ 30. Kg4 Qg2# {Normal Black wins by checkmate.} 0-1
[/pgn]

And some output at position after 18.f4:

r2q1rk1/pp2b2p/5pp1/3p2P1/2p2PbP/2P1P3/PPBK4/RNB4R b - - 0 1

Analysis by The Huntsman 1:

18...Lc5 19.Ld1 Lxe3+ 20.Ke1 Lxc1 21.Lxg4 Db6 22.Kd1 Lxf4 23.Tf1 Dxb2 24.Txf4 fxg5 25.Tf3 Tae8 26.hxg5 Dxa1 27.Txf8+ Txf8 28.Le2 Dxb1+ 29.Kd2 Db2+ 30.Ke1 Dc1+ 31.Ld1 Dxc3+ 32.Ke2 Dd3+ 33.Ke1 Tf1#
Tiefe: 57/32 00:09:48 21715MN

Chris Formula · Post by **Chris Formula** » Sat Oct 19, 2024 6:54 pm

Ajedrecista wrote: ↑Wed Oct 16, 2024 8:18 pm
[pgn][Event ""]
[Site ""]
[Date ""]
[White ""]
[Black ""]
[Result "0-1"]
[SetUp "1"]
[FEN "r2q1rk1/pp2b2p/6p1/6P1/2p1pP2/2P1P3/PP1K4/RNB2R2 w - - 0 22"]
[Result "0-1"]

22. Ke1 Qd3 23. Rf2 Rad8 24. Bd2 Rxf4 25. Rxf4 Bxg5 26. Rf2 Bh4 27. Kd1 Bxf2 28. a4 Bxe3 29. Kc1 Bxd2+ 30. Nxd2 Qxd2+ 31. Kb1 Qd1+ 32. Ka2 Qxa4+ 33. Kb1 Rd1# 0-1[/pgn]

Is there a faster checkmate?

Regards from Spain.

Ajedrecista.

Position: r2q1rk1/pp2b2p/6p1/6P1/2p1pP2/2P1P3/PP1K4/RNB2R2 w - - 0 22

Analysis by Stockfish Tinapa 3.1.8 SE
#-11/52 22.Ke2 Qd3+ 23.Ke1 Rad8 24.b4 Bxg5 25.Bd2 Bh4+ 26.Kd1 Qxf1+ 27.Kc2 Rxd2+ 28.Nxd2 Qd3+ 29.Kb2 Qxd2+ 30.Kb1 Bf6 31.a4 Bxc3 32.a5 Qb2#

Brunetti · Post by **Brunetti** » Sat Oct 19, 2024 8:00 pm

Chris Formula wrote: ↑Sat Oct 19, 2024 6:54 pm Analysis by Stockfish Tinapa 3.1.8 SE
#-11/52 22.Ke2

Hi,
best is 22. Ke1, there's no reason to play 22. Ke1. Why not 22. Kc2 then?

Alex

Chris Formula · Post by **Chris Formula** » Sat Oct 19, 2024 8:31 pm

[/quote]
Hi,
best is 22. Ke1, there's no reason to play 22. Ke1. Why not 22. Kc2 then?

Alex
[/quote]

Does Ke1 lead to mate in 10 or less?

Brunetti · Post by **Brunetti** » Sat Oct 19, 2024 8:49 pm

Chris Formula wrote: ↑Sat Oct 19, 2024 8:31 pm Does Ke1 lead to mate in 10 or less?

Are you searching for the best move for White or Black? Because Ke2 isn't the best move for either side!

Alex

Chris Formula · Post by **Chris Formula** » Sat Oct 19, 2024 9:08 pm

[/quote]
Are you searching for the best move for White or Black? Because Ke2 isn't the best move for either side!

Alex
[/quote]

searching for a line (not necessarily best move) to answer the original question: "Is there a faster checkmate?"

Vinvin · Post by **Vinvin** » Mon Oct 21, 2024 5:52 pm

Brunetti wrote: ↑Sat Oct 19, 2024 8:00 pm
Chris Formula wrote: ↑Sat Oct 19, 2024 6:54 pm Analysis by Stockfish Tinapa 3.1.8 SE
#-11/52 22.Ke2
Hi,
best is 22. Ke1, there's no reason to play 22. Ke1. Why not 22. Kc2 then?

Alex

Ke2, mate in 11 and Ke1 mate in 12.

Code: Select all

 32/22	05:18	 2.056.259k	6.463k	-M11	1.Ke2 Qd3+ 2.Ke1 Rad8 3.b4 Bxg5 4.Bd2 Bh4+ 5.Kd1 Qxf1+ 6.Kc2 Rxd2+ 7.Nxd2 Qd3+ 8.Kb2 Qxd2+ 9.Kb1 Bf6 10.b5 Qxc3 11.a3 Qb2+
 33/24	05:18	 2.056.259k	6.463k	-M12	1.Ke1 Qd3 2.Rf2 Rad8 3.Rd2 Qxe3+ 4.Kd1 Rxd2+ 5.Bxd2 Qd3 6.b4 Rxf4 7.Kc1 Rf2 8.Kb2 Rxd2+ 9.Nxd2 Qxd2+ 10.Kb1 Bxg5 11.a3 Qxc3 12.a4 Qb3+

Checkmate in ...?

Checkmate in ...?

Re: Checkmate in ...?

Re: Checkmate in ...?

Re: Checkmate in ...?

Re: Checkmate in ...?

Re: Checkmate in ...?

Re: Checkmate in ...?

Re: Checkmate in ...?

Re: Checkmate in ...?

Re: Checkmate in ...?