Can your engine find mate with this fen?

Discussion of anything and everything relating to chess playing software and machines.

Moderator: Ras

bastiball
Posts: 5361
Joined: Tue Oct 20, 2020 4:18 am
Full name: Basti Dangca

Can your engine find mate with this fen?

Post by bastiball »

[fen]2kb4/q2r4/P3Q1p1/2p5/4BB1P/7P/5P2/6K1 w - - 0 44[/fen]
Basti Dangca
CCRL testing group
Top
Jouni
Posts: 3769
Joined: Wed Mar 08, 2006 8:15 pm
Full name: Jouni Uski

Re: Can your engine find mate with this fen?

Post by Jouni »

Analysis by Crystal 140121:

44.h5 Bc7 45.Bb7+ Qxb7 46.axb7+ Kb8 47.Qxd7 Bxf4 48.hxg6 Ka7 49.Qc6 Be5 50.g7
+- (#10) Depth: 10/16 00:00:00 29kN
Jouni
Top
User avatar
Ajedrecista
Posts: 2164
Joined: Wed Jul 13, 2011 9:04 pm
Location: Madrid, Spain.

Re: Can your engine find mate with this FEN?

Post by Ajedrecista »

Hello:
bastiball wrote: ↑Sun Oct 31, 2021 11:27 am [fen]2kb4/q2r4/P3Q1p1/2p5/4BB1P/7P/5P2/6K1 w - - 0 44[/fen]
Regarding the title of the topic, SF 14 finds a mate easily starting with 44.- Bb7+ (which I would have played OTB without any doubt, just taking black queen, rook and bishop very soon to secure the win). Finding the shortest DTM is another issue: Chest 5.2 confirms that 44.- h5 is the only move with the shortest DTM:

Code: Select all

FEN: 2kb4/q2r4/P3Q1p1/2p5/4BB1P/7P/5P2/6K1 w - - 0 44 

ChestUCI:
FEN: 2kb4/q2r4/P3Q1p1/2p5/4BB1P/7P/5P2/6K1 w - -   (8+6)
Stellungs-Analyse:  C0/R0/K1/P4/X15   W:6/46
Suche nach Matt in 10 ...  (Hash=1024MB)
  10	13:48	 417.312.025	698.367	+M10	h4h5
Suche abgeschlossen ...  (Zeit=4186.58s)
Matt in 10 gefunden !  (1 Lösung in 1:09:46)
 10/10	1:10:58	2.969.127.087	709.200	+M10	h4h5 c5c4 h5xg6 Bd8h4 Be4b7+ Qa7xb7 a6xb7+ Kc8xb7 Qe6xd7+ Kb7b6 g6g7 Bh4xf2+ Kg1xf2 c4c3 g7g8Q c3c2 Qg8b8+ Kb6a6 Qb8b5+
This confirms that Crystal is an excellent mate solver.

Regards from Spain.

Ajedrecista.
Top
bastiball
Posts: 5361
Joined: Tue Oct 20, 2020 4:18 am
Full name: Basti Dangca

Re: Can your engine find mate with this fen?

Post by bastiball »

Ajedrecista wrote: ↑Sun Oct 31, 2021 1:35 pm Hello:
bastiball wrote: ↑Sun Oct 31, 2021 11:27 am [fen]2kb4/q2r4/P3Q1p1/2p5/4BB1P/7P/5P2/6K1 w - - 0 44[/fen]
Regarding the title of the topic, SF 14 finds a mate easily starting with 44.- Bb7+ (which I would have played OTB without any doubt, just taking black queen, rook and bishop very soon to secure the win). Finding the shortest DTM is another issue: Chest 5.2 confirms that 44.- h5 is the only move with the shortest DTM:

Code: Select all

FEN: 2kb4/q2r4/P3Q1p1/2p5/4BB1P/7P/5P2/6K1 w - - 0 44 

ChestUCI:
FEN: 2kb4/q2r4/P3Q1p1/2p5/4BB1P/7P/5P2/6K1 w - -   (8+6)
Stellungs-Analyse:  C0/R0/K1/P4/X15   W:6/46
Suche nach Matt in 10 ...  (Hash=1024MB)
  10	13:48	 417.312.025	698.367	+M10	h4h5
Suche abgeschlossen ...  (Zeit=4186.58s)
Matt in 10 gefunden !  (1 Lösung in 1:09:46)
 10/10	1:10:58	2.969.127.087	709.200	+M10	h4h5 c5c4 h5xg6 Bd8h4 Be4b7+ Qa7xb7 a6xb7+ Kc8xb7 Qe6xd7+ Kb7b6 g6g7 Bh4xf2+ Kg1xf2 c4c3 g7g8Q c3c2 Qg8b8+ Kb6a6 Qb8b5+
This confirms that Crystal is an excellent mate solver.

Regards from Spain.

Ajedrecista.
I thought Bb7 is the best move but Crystal prove how good it is as a mate solver :D
Basti Dangca
CCRL testing group
Top
shahil4242
Posts: 30
Joined: Thu Sep 28, 2017 5:20 pm

Re: Can your engine find mate with this fen?

Post by shahil4242 »

Evaluation based on only material and piece square.

[pgn]
[Event "Computer chess game"]
[Site "ACER-PC"]
[Date "2021.10.31"]
[Round "?"]
[White "Nimko"]
[Black "Nimko"]
[Result "1-0"]
[BlackElo "2000"]
[Time "20:07:29"]
[WhiteElo "2000"]
[SetUp "1"]
[FEN "2kb4/q2r4/P3Q1p1/2p5/4BB1P/7P/5P2/6K1 w - - 0 44"]
[Termination "normal"]
[PlyCount "25"]
[WhiteType "program"]
[BlackType "program"]

44. Bb7+ (Bb7 Qxb7 axb7 Kxb7 Qxd7 Ka6 Qxd8 Ka7) {+14.02/5 0} Qxb7 (Qxb7
axb7 Kxb7 Qxd7 Ka6 Qc8 Ka7 Qb8 Ka6 Qxd8) {-14.22/5 0} 45. axb7+ (axb7 Kxb7
Qxd7 Ka6 Qc8 Ka7 Qb8 Ka6 Qxd8) {+14.22/5 0} Kxb7 (Kxb7 Qxd7 Ka6 Qc8 Ka7 Qb8
Ka6 Qxd8) {-14.22/4 0} 46. Qxd7+ (Qxd7 Ka6 Qc8 Ka7 Qb8 Ka6 Qxd8) {+14.22/4
0} Ka6 (Ka6 Qxd8 c4 Qc8 Kb6 Qxc4 Kb7) {-15.20/5 1} 47. Qxd8 (Qxd8 c4 Qc8
Kb6 Qxc4 Kb7) {+15.20/5 0} c4 (c4 Qc8 Kb6 Be3 Kb5 Qe6 c3) {-15.38/5 0} 48.
Qf6+ (Qf6 Kb5 Qxg6 Kc5 Qd6 Kb5 Be5) {+15.59/5 0} Ka5 (Ka5 Qc6 Kb4 Qb6 Ka3
Be5 Ka4) {-15.63/5 1} 49. Qc6 (Qc6 Kb4 Qb6 Ka3 Be5 Ka4) {+15.63/5 0} Kb4
(Kb4 Be5 g5 hxg5 Kb3) {-15.76/5 0} 50. Be5 (Be5 Kb3 Qb5 Kc2 Qxc4 Kd2 Qe6)
{+15.84/5 0} Kb3 (Kb3 Qb5 Kc2 Qxc4 Kd2 Qe6) {-15.84/4 0} 51. Qb5+ (Qb5 Kc2
Qxc4 Kd2 Qc3 Ke2 Qc2 Kf3 Qxg6) {+16.84/5 0} Kc2 (Kc2 Qxc4 Kd1 Qd3 Kc1 f4 g5
hxg5) {-16.89/5 0} 52. Qxc4+ (Qxc4 Kd1 Qd3 Kc1 f4 g5 hxg5) {+16.89/5 0} Kd1
(Kd1 Qd3 Kc1 f4 g5 hxg5) {-16.89/4 0} 53. Qb3+ (Qd3 Kc1 f4 g5 hxg5)
{+16.89/4 1} Kd2 (Kd2 Bf4 Ke1 Qe3 Kd1 Qd2) {-M4/5 1} 54. Bf4+ (Bf4 Ke2 Qe3
Kd1 Qd2) {+M3/5 1} Ke2 (Ke2 Qe3 Kd1 Qd2) {-M3/5 0} 55. Qe3+ (Qe3 Kd1 Qd2)
{+M2/5 0} Kd1 (Kd1 Qd2) {-M2/5 0} 56. Qd2# (Qd2) {+M1/5 0} 1-0
[/pgn]
Top
amanjpro
Posts: 883
Joined: Sat Mar 13, 2021 1:47 am
Full name: Amanj Sherwany

Re: Can your engine find mate with this fen?

Post by amanjpro »

Zahak finds mate in 13 rather quickly (10G Hash, and 6 Threads):

Code: Select all

info depth 26 seldepth 25 hashfull 12 tbhits 0 nodes 87950336 nps 4442312 score mate +13 time 19798 pv e4b7 a7b7 a6b7 c8b7 e6d7 b7a6 d7d8 a6b5 d8c7 b5b4 f4d2 b4b5 d2e3 b5c4 c7c5 c4b3 e3g5 b3b2 c5c4 b2a1 g5f6 a1b1 c4b3 b1c1 f6g5
Then switches to mate in 12 after some more time:

Code: Select all

info depth 28 seldepth 23 hashfull 34 tbhits 0 nodes 295162641 nps 5177786 score mate +12 time 57005 pv e4b7 a7b7 a6b7 c8b7 e6d7 b7a6 d7d8 g6g5 f4g5 a6b5 d8d7 b5a5 g5d2 a5b6 d2e3 b6a5 e3c5 a5a6 d7c6 a6a5 c6b6 a5a4 b6b4
Then after a lot more thinking, mate in 11:

Code: Select all

info depth 32 seldepth 21 hashfull 355 tbhits 0 nodes 5216429804 nps 5407715 score mate +11 time 964627 pv e4b7 a7b7 a6b7 c8b7 e6d7 b7a6 d7d8 a6b5 d8d6 g6g5 f4e3 b5b4 d6c5 b4a4 c5b6 a4a3 b6b5 a3a2 e3c1 g5h4 b5b2
But couldn't find mate in 10 in a meaningful time
Top
MOBMAT
Posts: 403
Joined: Sat Feb 04, 2017 11:57 pm
Location: USA

Re: Can your engine find mate with this fen?

Post by MOBMAT »

Houdini 5 with Nav 6 TBs finds h5 +M10 easily and in PV2 finds Bb7+ is +M11.

Code: Select all

FEN: 2kb4/q2r4/P3Q1p1/2p5/4BB1P/7P/5P2/6K1 w - - 0 44

Houdini 6 (N6):
  31	00:07	 101,630,740	13,529,000	+M13	44.Bb7+ Qxb7 45.axb7+ Kxb7 46.Qxd7+ Kb6 47.Qxd8+ Kb5 48.Qd5 Kb4 49.Bd2+ Kb5 50.Be3 Kb6 51.Qxc5+ Kb7 52.Qb6+ Kc8 53.Qc6+ Kb8 54.Bb6 g5 55.Qc7+ Ka8 56.Qa7+
 31	00:07	 101,630,740	13,529,000	+M10	44.h5 Qb6 45.Bc6 Qa7 46.hxg6 Bf6 47.Qxf6 Rd1+ 48.Kg2 Rd7 49.Qf8+ Rd8 50.Qf5+ Rd7 51.g7 Qc7 52.g8Q+ Qd8 53.Qxd7+
---------------------------------------------------------------------------
 32	00:08	 118,822,107	13,640,000	+M13	44.Bb7+ Qxb7 45.axb7+ Kxb7 46.Qxd7+ Kb6 47.Qxd8+ Kb5 48.Qd5 Kb4 49.Bd2+ Kb5 50.Be3 Kb6 51.Qxc5+ Kb7 52.Qb6+ Kc8 53.Qc6+ Kb8 54.Bb6 g5 55.Qc7+ Ka8 56.Qa7+
 32	00:08	 118,822,107	13,640,000	+M10	44.h5 Qb6 45.Bc6 Qa7 46.hxg6 Bf6 47.Qxf6 Rd1+ 48.Kg2 Rd7 49.Qf8+ Rd8 50.Qf5+ Rd7 51.g7 Qc7 52.g8Q+ Qd8 53.Qxd7+
---------------------------------------------------------------------------
 33	00:10	 149,751,697	13,707,000	+M13	44.Bb7+ Qxb7 45.axb7+ Kxb7 46.Qxd7+ Kb6 47.Qxd8+ Kb5 48.Qd5 Kb4 49.Bd2+ Kb5 50.Be3 Kb6 51.Qxc5+ Kb7 52.Qb6+ Kc8 53.Qc6+ Kb8 54.Bb6 g5 55.Qc7+ Ka8 56.Qa7+
 33	00:10	 149,751,697	13,707,000	+M10	44.h5 Qb6 45.Bc6 Qa7 46.hxg6 Bf6 47.Qxf6 Rd1+ 48.Kg2 Rd7 49.Qf8+ Rd8 50.Qf5+ Rd7 51.g7 Qc7 52.g8Q+ Qd8 53.Qxd7+
---------------------------------------------------------------------------
 34	00:12	 176,928,400	13,769,000	+M13	44.Bb7+ Qxb7 45.axb7+ Kxb7 46.Qxd7+ Kb6 47.Qxd8+ Kb5 48.Qd5 Kb4 49.Bd2+ Kb5 50.Be3 Kb6 51.Qxc5+ Kb7 52.Qb6+ Kc8 53.Qc6+ Kb8 54.Bb6 g5 55.Qc7+ Ka8 56.Qa7+
 34	00:12	 176,928,400	13,769,000	+M10	44.h5 Qb6 45.Bc6 Qa7 46.hxg6 Bf6 47.Qxf6 Rd1+ 48.Kg2 Rd7 49.Qf8+ Rd8 50.Qf5+ Rd7 51.g7 Qc7 52.g8Q+ Qd8 53.Qxd7+
---------------------------------------------------------------------------
 35	00:16	 223,236,650	13,611,000	+M13	44.Bb7+ Qxb7 45.axb7+ Kxb7 46.Qxd7+ Kb6 47.Qxd8+ Kb5 48.Qd5 Kb4 49.Bd2+ Kb5 50.Be3 Kb6 51.Qxc5+ Kb7 52.Qb6+ Kc8 53.Qc6+ Kb8 54.Bb6 g5 55.Qc7+ Ka8 56.Qa7+
 35	00:16	 223,236,650	13,611,000	+M10	44.h5 Qb6 45.Bc6 Qa7 46.hxg6 Bf6 47.Qxf6 Rd1+ 48.Kg2 Rd7 49.Qf8+ Rd8 50.Qf5+ Rd7 51.g7 Qc7 52.g8Q+ Qd8 53.Qxd7+
---------------------------------------------------------------------------
 36	00:19	 265,014,373	13,794,000	+M12	44.Bb7+ Qxb7 45.axb7+ Kxb7 46.Qxd7+ Kb6 47.Qxd8+ Kb5 48.Qd5 Kb4 49.Bd2+ Kb5 50.Qe6 c4 51.Bc3 Kc5 52.Qxg6 Kd5 53.Qb6 Ke4 54.Qd4+ Kf5 55.Qg4+
 36	00:19	 265,014,373	13,794,000	+M10	44.h5 Qb6 45.Bc6 Qa7 46.hxg6 Bf6 47.Qxf6 Rd1+ 48.Kg2 Rd7 49.Qf8+ Rd8 50.Qf5+ Rd7 51.g7 Qc7 52.g8Q+ Qd8 53.Qxd7+
---------------------------------------------------------------------------
 37	00:21	 302,870,564	13,880,000	+M12	44.Bb7+ Qxb7 45.axb7+ Kxb7 46.Qxd7+ Kb6 47.Qxd8+ Kb5 48.Qd5 Kb4 49.Bd2+ Kb5 50.Qe6 c4 51.Bc3 Kc5 52.Qxg6 Kd5 53.Qb6 Ke4 54.Qd4+ Kf5 55.Qg4+
 37	00:21	 302,870,564	13,880,000	+M10	44.h5 Qb6 45.Bc6 Qa7 46.hxg6 Bf6 47.Qxf6 Rd1+ 48.Kg2 Rd7 49.Qf8+ Rd8 50.Qf5+ Rd7 51.g7 Qc7 52.g8Q+ Qd8 53.Qxd7+
---------------------------------------------------------------------------
 38	00:26	 380,652,565	14,098,000	+M12	44.Bb7+ Qxb7 45.axb7+ Kxb7 46.Qxd7+ Kb6 47.Qxd8+ Kb5 48.Qd5 Kb4 49.Bd2+ Kb5 50.Qe6 c4 51.Bc3 Kc5 52.Qxg6 Kd5 53.Qb6 Ke4 54.Qd4+ Kf5 55.Qg4+
 38	00:26	 380,652,565	14,098,000	+M10	44.h5 Qb6 45.Bc6 Qa7 46.hxg6 Bf6 47.Qxf6 Rd1+ 48.Kg2 Rd7 49.Qf8+ Rd8 50.Qf5+ Rd7 51.g7 Qc7 52.g8Q+ Qd8 53.Qxd7+
---------------------------------------------------------------------------
 39	00:42	 636,666,171	14,831,000	+M12	44.Bb7+ Qxb7 45.axb7+ Kxb7 46.Qxd7+ Kb6 47.Qxd8+ Kb5 48.Qd5 Kb4 49.Bd2+ Kb5 50.Qe6 c4 51.Bc3 Kc5 52.Qxg6 Kd5 53.Qb6 Ke4 54.Qd4+ Kf5 55.Qg4+
 39	00:42	 636,666,171	14,831,000	+M10	44.h5 Bc7 45.Bb7+ Qxb7 46.axb7+ Kb8 47.Qxd7 Bxf4 48.hxg6 Ka7 49.g7 Kb6 50.g8Q Ka5 51.b8Q Bxb8 52.Qxb8 Ka6 53.Qbb5+
---------------------------------------------------------------------------
 40	00:44	 663,947,793	14,835,000	+M12	44.Bb7+ Qxb7 45.axb7+ Kxb7 46.Qxd7+ Kb6 47.Qxd8+ Kb5 48.Qd6 Kb4 49.Bd2+ Kc4 50.Qd7 g5 51.hxg5 Kb3 52.Qd3+ Kb2 53.Qc3+ Ka2 54.Bc1 c4 55.Qb2+
 40	00:44	 663,947,793	14,835,000	+M10	44.h5 Be7 45.Bb7+ Qxb7 46.axb7+ Kxb7 47.Qxd7+ Kb6 48.Bc7+ Kb7 49.Bd8+ Ka6 50.Qc6+ Ka7 51.Bc7 gxh5 52.Qb6+ Ka8 53.Qa6+
---------------------------------------------------------------------------
 41	00:50	 756,362,568	14,936,000	+M12	44.Bb7+ Qxb7 45.axb7+ Kxb7 46.Qxd7+ Kb6 47.Qxd8+ Kb5 48.Qd6 Kb4 49.Bd2+ Kc4 50.Qd7 g5 51.hxg5 Kb3 52.Qd3+ Kb2 53.Qc3+ Ka2 54.Bc1 c4 55.Qb2+
 41	00:50	 756,362,568	14,936,000	+M10	44.h5 Be7 45.Bb7+ Qxb7 46.axb7+ Kxb7 47.Qxd7+ Kb6 48.Bc7+ Kb7 49.Bd8+ Ka6 50.Qc6+ Ka7 51.Bc7 gxh5 52.Qb6+ Ka8 53.Qa6+
---------------------------------------------------------------------------
 42	00:56	 855,528,435	15,097,000	+M11	44.Bb7+ Qxb7 45.axb7+ Kxb7 46.Qxd7+ Kb6 47.Qxd8+ Kb5 48.Qd5 Kb4 49.Be3 g5 50.Qxc5+ Kb3 51.Bd2 gxh4 52.Qc3+ Ka2 53.Bc1 Kb1 54.Qb2+
 42	00:56	 855,528,435	15,097,000	+M10	44.h5 Be7 45.Bb7+ Qxb7 46.axb7+ Kxb7 47.Qxd7+ Kb6 48.Bc7+ Kb7 49.Bd8+ Ka6 50.Qc6+ Ka7 51.Bc7 gxh5 52.Qb6+ Ka8 53.Qa6+
---------------------------------------------------------------------------
 43	01:03	 967,160,870	15,236,000	+M11	44.Bb7+ Qxb7 45.axb7+ Kxb7 46.Qxd7+ Kb6 47.Qxd8+ Kb5 48.Qd6 Kb4 49.Be3 Kb3 50.Qxc5 g5 51.Bd2 gxh4 52.Qc3+ Ka2 53.Bc1 Kb1 54.Qb2+
 43	01:03	 967,160,870	15,236,000	+M10	44.h5 Be7 45.Bb7+ Qxb7 46.axb7+ Kxb7 47.Qxd7+ Kb6 48.Bc7+ Kb7 49.Bd8+ Ka6 50.Qc6+ Ka7 51.Bc7 gxh5 52.Qb6+ Ka8 53.Qa6+
---------------------------------------------------------------------------
 44	01:10	1,077,470,762	15,317,000	+M11	44.Bb7+ Qxb7 45.axb7+ Kxb7 46.Qxd7+ Kb6 47.Qxd8+ Kb5 48.Qd6 Kb4 49.Be3 Kb3 50.Qxc5 g5 51.Bd2 gxh4 52.Qc3+ Ka2 53.Bc1 Kb1 54.Qb2+
 44	01:10	1,077,470,762	15,317,000	+M10	44.h5 Be7 45.Bb7+ Qxb7 46.axb7+ Kxb7 47.Qxd7+ Kb6 48.Bc7+ Kb7 49.Bd8+ Ka6 50.Qc6+ Ka7 51.Bc7 gxh5 52.Qb6+ Ka8 53.Qa6+
---------------------------------------------------------------------------
 45	01:18	1,217,434,746	15,447,000	+M11	44.Bb7+ Qxb7 45.axb7+ Kxb7 46.Qxd7+ Kb6 47.Qxd8+ Kb5 48.Qd6 Kb4 49.Be3 Kb3 50.Qxc5 g5 51.Bd2 gxh4 52.Qc3+ Ka2 53.Bc1 Kb1 54.Qb2+
 45	01:18	1,217,434,746	15,447,000	+M10	44.h5 Be7 45.Bb7+ Qxb7 46.axb7+ Kxb7 47.Qxd7+ Kb6 48.Bc7+ Kb7 49.Bd8+ Ka6 50.Qc6+ Ka7 51.Bc7 gxh5 52.Qb6+ Ka8 53.Qa6+
---------------------------------------------------------------------------
 46	01:27	1,365,383,166	15,567,000	+M11	44.Bb7+ Qxb7 45.axb7+ Kxb7 46.Qxd7+ Kb6 47.Qxd8+ Kb5 48.Qd6 Kb4 49.Be3 Kb3 50.Qxc5 g5 51.Bd2 gxh4 52.Qc3+ Ka2 53.Bc1 Kb1 54.Qb2+
 46	01:27	1,365,383,166	15,567,000	+M10	44.h5 Be7 45.Bb7+ Qxb7 46.axb7+ Kxb7 47.Qxd7+ Kb6 48.Bc7+ Kb7 49.Bd8+ Ka6 50.Qc6+ Ka7 51.Bc7 gxh5 52.Qb6+ Ka8 53.Qa6+
---------------------------------------------------------------------------
 47	01:39	1,556,113,886	15,631,000	+M11	44.Bb7+ Qxb7 45.axb7+ Kxb7 46.Qxd7+ Kb6 47.Qxd8+ Kb5 48.Qd6 Kb4 49.Be3 Kb3 50.Qxc5 g5 51.Bd2 gxh4 52.Qc3+ Ka2 53.Bc1 Kb1 54.Qb2+
 47	01:39	1,556,113,886	15,631,000	+M10	44.h5 Be7 45.Bb7+ Qxb7 46.axb7+ Kxb7 47.Qxd7+ Kb6 48.Bc7+ Kb7 49.Bd8+ Ka6 50.Qc6+ Ka7 51.Bc7 gxh5 52.Qb6+ Ka8 53.Qa6+
---------------------------------------------------------------------------
 48	01:54	1,798,359,722	15,756,000	+M11	44.Bb7+ Qxb7 45.axb7+ Kxb7 46.Qxd7+ Kb6 47.Qxd8+ Kb5 48.Qd6 Kb4 49.Be3 Kb3 50.Qxc5 g5 51.Bd2 gxh4 52.Qc3+ Ka2 53.Bc1 Kb1 54.Qb2+
 48	01:54	1,798,359,722	15,756,000	+M10	44.h5 Be7 45.Bb7+ Qxb7 46.axb7+ Kxb7 47.Qxd7+ Kb6 48.Bc7+ Kb7 49.Bd8+ Ka6 50.Qc6+ Ka7 51.Bc7 gxh5 52.Qb6+ Ka8 53.Qa6+
---------------------------------------------------------------------------
 49	02:09	2,061,460,155	15,912,000	+M11	44.Bb7+ Qxb7 45.axb7+ Kxb7 46.Qxd7+ Kb6 47.Qxd8+ Kb5 48.Qd6 Kb4 49.Be3 Kb3 50.Qxc5 g5 51.Bd2 gxh4 52.Qc3+ Ka2 53.Bc1 Kb1 54.Qb2+
 49	02:09	2,061,460,155	15,912,000	+M10	44.h5 Be7 45.Bb7+ Qxb7 46.axb7+ Kxb7 47.Qxd7+ Kb6 48.Bc7+ Kb7 49.Bd8+ Ka6 50.Qc6+ Ka7 51.Bc7 gxh5 52.Qb6+ Ka8 53.Qa6+
---------------------------------------------------------------------------
 50	02:27	2,354,813,992	16,000,000	+M11	44.Bb7+ Qxb7 45.axb7+ Kxb7 46.Qxd7+ Kb6 47.Qxd8+ Kb5 48.Qd6 Kb4 49.Be3 Kb3 50.Qxc5 g5 51.Bd2 gxh4 52.Qc3+ Ka2 53.Bc1 Kb1 54.Qb2+
 50	02:27	2,354,813,992	16,000,000	+M10	44.h5 Be7 45.Bb7+ Qxb7 46.axb7+ Kxb7 47.Qxd7+ Kb6 48.Bc7+ Kb7 49.Bd8+ Ka6 50.Qc6+ Ka7 51.Bc7 gxh5 52.Qb6+ Ka8 53.Qa6+
---------------------------------------------------------------------------
 51	02:46	2,686,139,222	16,140,000	+M11	44.Bb7+ Qxb7 45.axb7+ Kxb7 46.Qxd7+ Kb6 47.Qxd8+ Kb5 48.Qd6 Kb4 49.Be3 Kb3 50.Qxc5 g5 51.Bd2 gxh4 52.Qc3+ Ka2 53.Bc1 Kb1 54.Qb2+
 51	02:46	2,686,139,222	16,140,000	+M10	44.h5 Be7 45.Bb7+ Qxb7 46.axb7+ Kxb7 47.Qxd7+ Kb6 48.Bc7+ Kb7 49.Bd8+ Ka6 50.Qc6+ Ka7 51.Bc7 gxh5 52.Qb6+ Ka8 53.Qa6+
---------------------------------------------------------------------------
 52	03:09	3,083,826,307	16,282,000	+M11	44.Bb7+ Qxb7 45.axb7+ Kxb7 46.Qxd7+ Kb6 47.Qxd8+ Kb5 48.Qd6 Kb4 49.Be3 Kb3 50.Qxc5 g5 51.Bd2 gxh4 52.Qc3+ Ka2 53.Bc1 Kb1 54.Qb2+
 52	03:09	3,083,826,307	16,282,000	+M10	44.h5 Be7 45.Bb7+ Qxb7 46.axb7+ Kxb7 47.Qxd7+ Kb6 48.Bc7+ Kb7 49.Bd8+ Ka6 50.Qc6+ Ka7 51.Bc7 gxh5 52.Qb6+ Ka8 53.Qa6+
---------------------------------------------------------------------------
 52	03:12	3,141,160,765	16,296,000	+M11	44.Bb7+ Qxb7 45.axb7+ Kxb7 46.Qxd7+ Kb6 47.Qxd8+ Kb5 48.Qd6 Kb4 49.Be3 Kb3 50.Qxc5 g5 51.Bd2 gxh4 52.Qc3+ Ka2 53.Bc1 Kb1 54.Qb2+
 53	03:12	3,141,160,765	16,296,000	+M10	44.h5 Be7 45.Bb7+ Qxb7 46.axb7+ Kxb7 47.Qxd7+ Kb6 48.Bc7+ Kb7 49.Bd8+ Ka6 50.Qc6+ Ka7 51.Bc7 gxh5 52.Qb6+ Ka8 53.Qa6+
i7-6700K @ 4.00Ghz 32Gb, Win 10 Home, EGTBs on PCI SSD
Benchmark: Stockfish15.1 NNUE x64 bmi2 (nps): 1277K
Top
User avatar
Marek Soszynski
Posts: 587
Joined: Wed May 10, 2006 7:28 pm
Location: Birmingham, England

Re: Can your engine find mate with this fen?

Post by Marek Soszynski »

Jouni wrote: ↑Sun Oct 31, 2021 12:00 pm Analysis by Crystal 140121:

44.h5 Bc7 45.Bb7+ Qxb7 46.axb7+ Kb8 47.Qxd7 Bxf4 48.hxg6 Ka7 49.Qc6 Be5 50.g7
+- (#10) Depth: 10/16 00:00:00 29kN
Results are variable. On my system with several tries, Crystal 3.2 never got it at all, Houdidit got it nearly (but not) every time, the latest ShashChess (with 1 of the 4 threads full depth) got it but less often than Houdidit. Houdidit and ShashChess either got it quickly or not at all.
Marek Soszynski
Top

Return to “Computer Chess Club: General Topics”