Mate in 21

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

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peter
Posts: 3410
Joined: Sat Feb 16, 2008 7:38 am
Full name: Peter Martan

Re: Mate in 21

Post by peter »

acase wrote: ↑Tue Feb 06, 2024 3:13 am I have never found any engine that can get the mate in 25
Well, to "get it" isn't any problem for Huntsman letting him go backward your line:

4bnrq/3pP1pk/3Pp1n1/4p3/6N1/p1pB1P2/PbPpPP2/3N3K w - - 0 1

Analysis by The Huntsman 1:

1.Le4 Lf7 2.e3 Le8 3.Kg2 Lf7 4.Kf1 La1 5.Ke2 Lb2 6.Kd3 Le8 7.Kc4 Lf7 8.Kb5 Lc1 9.Kc5 Lb2 10.Kb6 Le8 11.Kc7 Lf7 12.Kd8 Lc1 13.e8S Lxe8 14.Kxe8 Lb2 15.f4 exf4 16.exf4 La1 17.Ld3 Lb2 18.Kf7 La1 19.f3 e5 20.Le4 Lb2 21.fxe5 Lc1 22.e6 dxe6 23.d7 e5 24.d8D Se6 25.Lxg6#
Weiß setzt Matt.
+- (#25) Tiefe: 103/50 00:02:48 5852MN

Didn't give much time to the engine started from empty hash at root, maybe it would make any DTM- output overnight yet too, but that's always the point with such positions using them for testing engines with, does any winning eval with a thematically correct (?) output- line count as solved or only the best DTM (if known at all for sure) with the full line to mate?

Gustav with 3 flights is only in depth 15 after half an hour, so I didn't let him go on trying from very starting position neither.
After first 10 moves with (from there onwards) 0 flights it gets the rest in about 3 minutes.
1.Le4 Lf7 2.e3 Le8 3.Kg2 Lf7 4.Kf1 La1 5.Ke2 Lb2 6.Kd3 Le8 7.Kc4 Lf7 8.Kb5 Lc1 9.Kc5 Lb2 10.Kb6 Le8 [d]4bnrq/3pP1pk/1K1Pp1n1/4p3/4B1N1/p1p1PP2/PbPp1P2/3N4 w - - 0 11 1.Kb6-c7 Lb2-a1 2.Kc7-d8 Le8-f7 3.e7-e8D Lf7-e8 4.Kd8-e8 La1-b2 5.Bf3-f4 Be5-f4 6.Be3-f4 Lb2-a1 7.Bf2-f3 La1-b2 8.Le4-d3 Lb2-a1 9.Ke8-f7 Be6-e5 10.Ld3-e4 La1-b2 (5)
Peter.
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acase
Posts: 994
Joined: Wed Mar 15, 2006 1:14 am
Location: Columbus, Ohio USA
Full name: Andrew R Case

Re: Mate in 21

Post by acase »

peter wrote: ↑Tue Feb 06, 2024 1:54 pm
acase wrote: ↑Tue Feb 06, 2024 3:13 am I have never found any engine that can get the mate in 25
Well, to "get it" isn't any problem for Huntsman letting him go backward your line:
Well Peter, what I meant was no engine that I've tried finds the full solution from the root position, meaning that none that I've tried announces mate in 25 from the beginning position.
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acase
Posts: 994
Joined: Wed Mar 15, 2006 1:14 am
Location: Columbus, Ohio USA
Full name: Andrew R Case

Re: Mate in 21

Post by acase »

Looks like Crystallite 1.1a finds a mate in 21 on this one after about 4 hours and 11 minutes on my computer:

Code: Select all

FEN: 5bb1/1p2prrn/3pNp2/5Np1/1p5p/6Pk/4B2P/4K3 w - - 0 1

Crystallite 1.1a-bmi2:
NNUE evaluation using nn-793ebdeaf2e5.nnue enabled
 1/1	00:00	 2k	546k	-7.82	1.g3xh4
 2/2	00:00	 3k	1,024k	-7.82	1.g3xh4 Kh3xh2
 3/3	00:00	 5k	1,596k	-7.42	1.g3xh4 Kh3xh2 2.Ne6-c7 g5xh4
 4/4	00:00	 13k	4,212k	-7.29	1.g3xh4 Kh3xh2 2.Ne6-c7 e7-e6
 5/5	00:00	 19k	4,735k	-7.59	1.g3xh4 Kh3xh2 2.Ne6-c7 e7-e6 3.Nf5xg7
 6/7	00:00	 52k	10,323k	-8.02	1.Ke1-f1 Kh3xh2 2.g3xh4 g5-g4 3.Nf5xg7 Bf8xg7
 7/9	00:00	 120k	17,116k	-7.65	1.Nf5-e3 Kh3xh2 2.Ne3-f1+ Kh2-g1 3.g3xh4 f6-f5 4.Nf1-d2 g5-g4
 8/11	00:00	 217k	21,724k	-8.52	1.Ne6-d4 g5-g4 2.g3xh4 e7-e6 3.Nf5-g3 Bf8-e7 4.Ng3-f1 e6-e5
 9/14	00:00	 580k	27,612k	-9.19	1.Ke1-d2 Kh3xh2 2.g3xh4 g5xh4 3.Nf5xh4 Rg7-g1 4.Nh4-f3+ Kh2-g3 5.Nf3xg1 Nh7-g5 6.Ne6-g7 Bf8xg7
 10/16	00:00	 738k	29,504k	-9.30	1.g3-g4 Kh3xh2 2.Ne6-d4 e7-e6 3.Nd4-f3+ Kh2-h1 4.Nf5-e3 Rf7-c7 5.Ne3-d1 b4-b3 6.Nd1-f2+ Kh1-g2 7.Nf2-d1 Rc7-c1
 11/24	00:00	 2,270k	25,218k	-8.23	1.Be2-f1+ Kh3-g4 2.Ne6-d4 h4xg3 3.h2xg3 Kg4-h5 4.Bf1-e2+ g5-g4 5.Nd4-e6 Rg7-g6 6.Be2-d1 Bf8-h6 7.Ne6-d4 b7-b6 8.Nd4-e6 Rf7-g7
 12/22	00:00	 3,751k	24,356k	-8.35	1.Be2-f1+ Kh3-g4 2.Nf5-e3+ Kg4-f3 3.Ne3-d5 Kf3-e4 4.Nd5xb4 Ke4-f5 5.Bf1-c4 b7-b5 6.Ne6-d4+ Kf5-g6 7.Bc4-d3+ f6-f5 8.g3xh4 Kg6-h6 9.Bd3xf5 g5xh4
 13/29	00:00	 6,474k	23,629k	 0.00	1.Ke1-f2 b4-b3 2.Ne6-d4 h4xg3+ 3.h2xg3 b3-b2 4.Be2-f1+ Kh3-g4 5.Bf1-e2+
 14/11	00:00	 6,580k	23,667k	 0.00	1.Ke1-f2 b4-b3 2.Ne6-d4 h4xg3+ 3.h2xg3 b3-b2 4.Be2-f1+ Kh3-g4 5.Bf1-e2+
 15/11	00:00	 6,979k	23,498k	 0.00	1.Ke1-f2 b4-b3 2.Ne6-d4 h4xg3+ 3.h2xg3 b3-b2 4.Be2-f1+ Kh3-g4 5.Bf1-e2+
 16/11	00:00	 7,204k	23,390k	 0.00	1.Ke1-f2 b4-b3 2.Ne6-d4 h4xg3+ 3.h2xg3 b3-b2 4.Be2-f1+ Kh3-g4 5.Bf1-e2+
 17/11	00:00	 7,721k	23,255k	 0.00	1.Ke1-f2 b4-b3 2.Ne6-d4 h4xg3+ 3.h2xg3 b3-b2 4.Be2-f1+ Kh3-g4 5.Bf1-e2+
 18/11	00:00	 9,182k	22,840k	 0.00	1.Ke1-f2 b4-b3 2.Ne6-d4 h4xg3+ 3.h2xg3 b3-b2 4.Be2-f1+ Kh3-g4 5.Bf1-e2+
 19/11	00:00	 10,915k	22,551k	 0.00	1.Ke1-f2 b4-b3 2.Ne6-d4 h4xg3+ 3.h2xg3 b3-b2 4.Be2-f1+ Kh3-g4 5.Bf1-e2+
 20/11	00:00	 12,325k	22,449k	 0.00	1.Ke1-f2 b4-b3 2.Ne6-d4 h4xg3+ 3.h2xg3 b3-b2 4.Be2-f1+ Kh3-g4 5.Bf1-e2+
 21/11	00:00	 15,897k	22,017k	 0.00	1.Ke1-f2 b4-b3 2.Ne6-d4 h4xg3+ 3.h2xg3 b3-b2 4.Be2-f1+ Kh3-g4 5.Bf1-e2+
 22/11	00:01	 23,565k	21,540k	 0.00	1.Ke1-f2 b4-b3 2.Ne6-d4 h4xg3+ 3.h2xg3 b3-b2 4.Be2-f1+ Kh3-g4 5.Bf1-e2+
 23/11	00:01	 36,152k	21,609k	 0.00	1.Ke1-f2 b4-b3 2.Ne6-d4 h4xg3+ 3.h2xg3 b3-b2 4.Be2-f1+ Kh3-g4 5.Bf1-e2+
 24/11	00:02	 45,465k	21,547k	 0.00	1.Ke1-f2 b4-b3 2.Ne6-d4 h4xg3+ 3.h2xg3 b3-b2 4.Be2-f1+ Kh3-g4 5.Bf1-e2+
 25/11	00:02	 61,711k	21,791k	 0.00	1.Ke1-f2 b4-b3 2.Ne6-d4 h4xg3+ 3.h2xg3 b3-b2 4.Be2-f1+ Kh3-g4 5.Bf1-e2+
 26/11	00:06	 136,449k	21,394k	 0.00	1.Ke1-f2 b4-b3 2.Ne6-d4 h4xg3+ 3.h2xg3 b3-b2 4.Be2-f1+ Kh3-g4 5.Bf1-e2+
 27/11	00:11	 256,931k	21,739k	 0.00	1.Ke1-f2 b4-b3 2.Ne6-d4 h4xg3+ 3.h2xg3 b3-b2 4.Be2-f1+ Kh3-g4 5.Bf1-e2+
 28/11	00:17	 373,762k	21,709k	 0.00	1.Ke1-f2 b4-b3 2.Ne6-d4 h4xg3+ 3.h2xg3 b3-b2 4.Be2-f1+ Kh3-g4 5.Bf1-e2+
 29/11	00:26	 564,000k	21,560k	 0.00	1.Ke1-f2 b4-b3 2.Ne6-d4 h4xg3+ 3.h2xg3 b3-b2 4.Be2-f1+ Kh3-g4 5.Bf1-e2+
 30/11	01:13	 1,563,349k	21,231k	 0.00	1.Ke1-f2 b4-b3 2.Ne6-d4 h4xg3+ 3.h2xg3 b3-b2 4.Be2-f1+ Kh3-g4 5.Bf1-e2+
 31/11	01:49	 2,383,080k	21,695k	 0.00	1.Ke1-f2 b4-b3 2.Ne6-d4 h4xg3+ 3.h2xg3 b3-b2 4.Be2-f1+ Kh3-g4 5.Bf1-e2+
 32/11	02:28	 3,251,731k	21,886k	 0.00	1.Ke1-f2 b4-b3 2.Ne6-d4 h4xg3+ 3.h2xg3 b3-b2 4.Be2-f1+ Kh3-g4 5.Bf1-e2+
 33/11	10:13	 13,191,113k	21,517k	 0.00	1.Ke1-f2 b4-b3 2.Ne6-d4 h4xg3+ 3.h2xg3 b3-b2 4.Be2-f1+ Kh3-g4 5.Bf1-e2+
 34/11	13:56	 18,225,173k	21,780k	 0.00	1.Ke1-f2 b4-b3 2.Ne6-d4 h4xg3+ 3.h2xg3 b3-b2 4.Be2-f1+ Kh3-g4 5.Bf1-e2+
 35/11	16:17	 21,328,108k	21,828k	 0.00	1.Ke1-f2 b4-b3 2.Ne6-d4 h4xg3+ 3.h2xg3 b3-b2 4.Be2-f1+ Kh3-g4 5.Bf1-e2+
 36/11	21:20	 28,530,856k	22,279k	 0.00	1.Ke1-f2 b4-b3 2.Ne6-d4 h4xg3+ 3.h2xg3 b3-b2 4.Be2-f1+ Kh3-g4 5.Bf1-e2+
 37/41+	4:11:20	323,831,434k	21,473k	+151.49	1.Ke1-f2
 37/41+	4:11:20	323,831,437k	21,473k	+M22	1.Ke1-f2
 37/41	4:11:20	323,831,602k	21,473k	+M21	1.Ke1-f2 b4-b3 2.Be2-f1+ Kh3-g4 3.Nf5-e3+ Kg4-h5 4.g3-g4+ Kh5-h6 5.Ne3-f5+ Kh6-g6 6.Bf1-c4 h4-h3 7.Bc4-d3 b7-b6 8.Bd3-b1 d6-d5 9.Kf2-e3 b6-b5 10.Ke3-d4 b3-b2 11.Kd4-c5 b5-b4 12.Kc5-c6 d5-d4 13.Kc6-d7 d4-d3 14.Bb1xd3 b2-b1Q 15.Bd3xb1 b4-b3 16.Kd7-e8 b3-b2 17.Nf5xe7+ Kg6-h6 18.Ne7-f5+ Kh6-g6 19.Ne6-d4 Rf7-c7 20.Nf5-e7+ Kg6-h6 21.Nd4-f5+
 38/41	4:11:20	323,831,616k	21,473k	+M21	1.Ke1-f2 b4-b3 2.Be2-f1+ Kh3-g4 3.Nf5-e3+ Kg4-h5 4.g3-g4+ Kh5-h6 5.Ne3-f5+ Kh6-g6 6.Bf1-c4 h4-h3 7.Bc4-d3 b7-b6 8.Bd3-b1 d6-d5 9.Kf2-e3 b6-b5 10.Ke3-d4 b3-b2 11.Kd4-c5 b5-b4 12.Kc5-c6 d5-d4 13.Kc6-d7 d4-d3 14.Bb1xd3 b2-b1Q 15.Bd3xb1 b4-b3 16.Kd7-e8 b3-b2 17.Nf5xe7+ Kg6-h6 18.Ne7-f5+ Kh6-g6 19.Ne6-d4 Rf7-c7 20.Nf5-e7+ Kg6-h6 21.Nd4-f5+
 39/41	4:11:20	323,831,651k	21,473k	+M21	1.Ke1-f2 b4-b3 2.Be2-f1+ Kh3-g4 3.Nf5-e3+ Kg4-h5 4.g3-g4+ Kh5-h6 5.Ne3-f5+ Kh6-g6 6.Bf1-c4 h4-h3 7.Bc4-d3 b7-b6 8.Bd3-b1 d6-d5 9.Kf2-e3 b6-b5 10.Ke3-d4 b3-b2 11.Kd4-c5 b5-b4 12.Kc5-c6 d5-d4 13.Kc6-d7 d4-d3 14.Bb1xd3 b2-b1Q 15.Bd3xb1 b4-b3 16.Kd7-e8 b3-b2 17.Nf5xe7+ Kg6-h6 18.Ne7-f5+ Kh6-g6 19.Ne6-d4 Rf7-c7 20.Nf5-e7+ Kg6-h6 21.Nd4-f5+
 40/41	4:11:20	323,831,689k	21,473k	+M21	1.Ke1-f2 b4-b3 2.Be2-f1+ Kh3-g4 3.Nf5-e3+ Kg4-h5 4.g3-g4+ Kh5-h6 5.Ne3-f5+ Kh6-g6 6.Bf1-c4 h4-h3 7.Bc4-d3 b7-b6 8.Bd3-b1 d6-d5 9.Kf2-e3 b6-b5 10.Ke3-d4 b3-b2 11.Kd4-c5 b5-b4 12.Kc5-c6 d5-d4 13.Kc6-d7 d4-d3 14.Bb1xd3 b2-b1Q 15.Bd3xb1 b4-b3 16.Kd7-e8 b3-b2 17.Nf5xe7+ Kg6-h6 18.Ne7-f5+ Kh6-g6 19.Ne6-d4 Rf7-c7 20.Nf5-e7+ Kg6-h6 21.Nd4-f5+
 41/41	4:11:20	323,831,753k	21,473k	+M21	1.Ke1-f2 b4-b3 2.Be2-f1+ Kh3-g4 3.Nf5-e3+ Kg4-h5 4.g3-g4+ Kh5-h6 5.Ne3-f5+ Kh6-g6 6.Bf1-c4 h4-h3 7.Bc4-d3 b7-b6 8.Bd3-b1 d6-d5 9.Kf2-e3 b6-b5 10.Ke3-d4 b3-b2 11.Kd4-c5 b5-b4 12.Kc5-c6 d5-d4 13.Kc6-d7 d4-d3 14.Bb1xd3 b2-b1Q 15.Bd3xb1 b4-b3 16.Kd7-e8 b3-b2 17.Nf5xe7+ Kg6-h6 18.Ne7-f5+ Kh6-g6 19.Ne6-d4 Rf7-c7 20.Nf5-e7+ Kg6-h6 21.Nd4-f5+
 42/41	4:11:20	323,834,032k	21,473k	+M21	1.Ke1-f2 b4-b3 2.Be2-f1+ Kh3-g4 3.Nf5-e3+ Kg4-h5 4.g3-g4+ Kh5-h6 5.Ne3-f5+ Kh6-g6 6.Bf1-c4 h4-h3 7.Bc4-d3 b7-b6 8.Bd3-b1 d6-d5 9.Kf2-e3 b6-b5 10.Ke3-d4 b3-b2 11.Kd4-c5 b5-b4 12.Kc5-c6 d5-d4 13.Kc6-d7 d4-d3 14.Bb1xd3 b2-b1Q 15.Bd3xb1 b4-b3 16.Kd7-e8 b3-b2 17.Nf5xe7+ Kg6-h6 18.Ne7-f5+ Kh6-g6 19.Ne6-d4 Rf7-c7 20.Nf5-e7+ Kg6-h6 21.Nd4-f5+
 43/41	4:11:20	323,836,960k	21,473k	+M21	1.Ke1-f2 b4-b3 2.Be2-f1+ Kh3-g4 3.Nf5-e3+ Kg4-h5 4.g3-g4+ Kh5-h6 5.Ne3-f5+ Kh6-g6 6.Bf1-c4 h4-h3 7.Bc4-d3 b7-b6 8.Bd3-b1 d6-d5 9.Kf2-e3 b6-b5 10.Ke3-d4 b3-b2 11.Kd4-c5 b5-b4 12.Kc5-c6 d5-d4 13.Kc6-d7 d4-d3 14.Bb1xd3 b2-b1Q 15.Bd3xb1 b4-b3 16.Kd7-e8 b3-b2 17.Nf5xe7+ Kg6-h6 18.Ne7-f5+ Kh6-g6 19.Ne6-d4 Rf7-c7 20.Nf5-e7+ Kg6-h6 21.Nd4-f5+
 44/41	4:11:32	324,073,215k	21,473k	+M21	1.Ke1-f2 b4-b3 2.Be2-f1+ Kh3-g4 3.Nf5-e3+ Kg4-h5 4.g3-g4+ Kh5-h6 5.Ne3-f5+ Kh6-g6 6.Bf1-c4 h4-h3 7.Bc4-d3 b7-b6 8.Bd3-b1 d6-d5 9.Kf2-e3 b6-b5 10.Ke3-d4 b3-b2 11.Kd4-c5 b5-b4 12.Kc5-c6 d5-d4 13.Kc6-d7 d4-d3 14.Bb1xd3 b2-b1Q 15.Bd3xb1 b4-b3 16.Kd7-e8 b3-b2 17.Nf5xe7+ Kg6-h6 18.Ne7-f5+ Kh6-g6 19.Ne6-d4 Rf7-c7 20.Nf5-e7+ Kg6-h6 21.Nd4-f5+
 45/41	4:12:13	324,944,386k	21,472k	+M21	1.Ke1-f2 b4-b3 2.Be2-f1+ Kh3-g4 3.Nf5-e3+ Kg4-h5 4.g3-g4+ Kh5-h6 5.Ne3-f5+ Kh6-g6 6.Bf1-c4 h4-h3 7.Bc4-d3 b7-b6 8.Bd3-b1 d6-d5 9.Kf2-e3 b6-b5 10.Ke3-d4 b3-b2 11.Kd4-c5 b5-b4 12.Kc5-c6 d5-d4 13.Kc6-d7 d4-d3 14.Bb1xd3 b2-b1Q 15.Bd3xb1 b4-b3 16.Kd7-e8 b3-b2 17.Nf5xe7+ Kg6-h6 18.Ne7-f5+ Kh6-g6 19.Ne6-d4 Rf7-c7 20.Nf5-e7+ Kg6-h6 21.Nd4-f5+
 46/41	4:12:50	325,751,457k	21,472k	+M21	1.Ke1-f2 b4-b3 2.Be2-f1+ Kh3-g4 3.Nf5-e3+ Kg4-h5 4.g3-g4+ Kh5-h6 5.Ne3-f5+ Kh6-g6 6.Bf1-c4 h4-h3 7.Bc4-d3 b7-b6 8.Bd3-b1 d6-d5 9.Kf2-e3 b6-b5 10.Ke3-d4 b3-b2 11.Kd4-c5 b5-b4 12.Kc5-c6 d5-d4 13.Kc6-d7 d4-d3 14.Bb1xd3 b2-b1Q 15.Bd3xb1 b4-b3 16.Kd7-e8 b3-b2 17.Nf5xe7+ Kg6-h6 18.Ne7-f5+ Kh6-g6 19.Ne6-d4 Rf7-c7 20.Nf5-e7+ Kg6-h6 21.Nd4-f5+
 47/41	4:13:57	327,178,394k	21,472k	+M21	1.Ke1-f2 b4-b3 2.Be2-f1+ Kh3-g4 3.Nf5-e3+ Kg4-h5 4.g3-g4+ Kh5-h6 5.Ne3-f5+ Kh6-g6 6.Bf1-c4 h4-h3 7.Bc4-d3 b7-b6 8.Bd3-b1 d6-d5 9.Kf2-e3 b6-b5 10.Ke3-d4 b3-b2 11.Kd4-c5 b5-b4 12.Kc5-c6 d5-d4 13.Kc6-d7 d4-d3 14.Bb1xd3 b2-b1Q 15.Bd3xb1 b4-b3 16.Kd7-e8 b3-b2 17.Nf5xe7+ Kg6-h6 18.Ne7-f5+ Kh6-g6 19.Ne6-d4 Rf7-c7 20.Nf5-e7+ Kg6-h6 21.Nd4-f5+
 48/41	4:15:23	329,022,975k	21,472k	+M21	1.Ke1-f2 b4-b3 2.Be2-f1+ Kh3-g4 3.Nf5-e3+ Kg4-h5 4.g3-g4+ Kh5-h6 5.Ne3-f5+ Kh6-g6 6.Bf1-c4 h4-h3 7.Bc4-d3 b7-b6 8.Bd3-b1 d6-d5 9.Kf2-e3 b6-b5 10.Ke3-d4 b3-b2 11.Kd4-c5 b5-b4 12.Kc5-c6 d5-d4 13.Kc6-d7 d4-d3 14.Bb1xd3 b2-b1Q 15.Bd3xb1 b4-b3 16.Kd7-e8 b3-b2 17.Nf5xe7+ Kg6-h6 18.Ne7-f5+ Kh6-g6 19.Ne6-d4 Rf7-c7 20.Nf5-e7+ Kg6-h6 21.Nd4-f5+
 49/41	4:17:40	331,972,627k	21,472k	+M21	1.Ke1-f2 b4-b3 2.Be2-f1+ Kh3-g4 3.Nf5-e3+ Kg4-h5 4.g3-g4+ Kh5-h6 5.Ne3-f5+ Kh6-g6 6.Bf1-c4 h4-h3 7.Bc4-d3 b7-b6 8.Bd3-b1 d6-d5 9.Kf2-e3 b6-b5 10.Ke3-d4 b3-b2 11.Kd4-c5 b5-b4 12.Kc5-c6 d5-d4 13.Kc6-d7 d4-d3 14.Bb1xd3 b2-b1Q 15.Bd3xb1 b4-b3 16.Kd7-e8 b3-b2 17.Nf5xe7+ Kg6-h6 18.Ne7-f5+ Kh6-g6 19.Ne6-d4 Rf7-c7 20.Nf5-e7+ Kg6-h6 21.Nd4-f5+
 50/41	4:21:39	337,166,964k	21,476k	+M21	1.Ke1-f2 b4-b3 2.Be2-f1+ Kh3-g4 3.Nf5-e3+ Kg4-h5 4.g3-g4+ Kh5-h6 5.Ne3-f5+ Kh6-g6 6.Bf1-c4 h4-h3 7.Bc4-d3 b7-b6 8.Bd3-b1 d6-d5 9.Kf2-e3 b6-b5 10.Ke3-d4 b3-b2 11.Kd4-c5 b5-b4 12.Kc5-c6 d5-d4 13.Kc6-d7 d4-d3 14.Bb1xd3 b2-b1Q 15.Bd3xb1 b4-b3 16.Kd7-e8 b3-b2 17.Nf5xe7+ Kg6-h6 18.Ne7-f5+ Kh6-g6 19.Ne6-d4 Rf7-c7 20.Nf5-e7+ Kg6-h6 21.Nd4-f5+
 51/41	4:28:47	346,605,213k	21,492k	+M21	1.Ke1-f2 b4-b3 2.Be2-f1+ Kh3-g4 3.Nf5-e3+ Kg4-h5 4.g3-g4+ Kh5-h6 5.Ne3-f5+ Kh6-g6 6.Bf1-c4 h4-h3 7.Bc4-d3 b3-b2 8.Kf2-e3 b2-b1Q 9.Bd3xb1 b7-b6 10.Ke3-d3 d6-d5 11.Kd3-d4 b6-b5 12.Kd4-c5 b5-b4 13.Kc5-c6 d5-d4 14.Kc6-d7 b4-b3 15.Kd7-e8 d4-d3 16.Bb1xd3 b3-b2 17.Nf5xe7+ Kg6-h6 18.Ne7-f5+ Kh6-g6 19.Ne6-d4 Bf8-b4 20.Nf5-e7+ Kg6-h6 21.Nd4-f5+
 52/41	4:38:20	359,424,180k	21,522k	+M21	1.Ke1-f2 b4-b3 2.Be2-f1+ Kh3-g4 3.Nf5-e3+ Kg4-h5 4.g3-g4+ Kh5-h6 5.Ne3-f5+ Kh6-g6 6.Bf1-c4 h4-h3 7.Bc4-d3 b3-b2 8.Kf2-e3 b2-b1Q 9.Bd3xb1 b7-b6 10.Ke3-d3 d6-d5 11.Kd3-d4 b6-b5 12.Kd4-c5 b5-b4 13.Kc5-c6 d5-d4 14.Kc6-d7 b4-b3 15.Kd7-e8 d4-d3 16.Bb1xd3 b3-b2 17.Nf5xe7+ Kg6-h6 18.Ne7-f5+ Kh6-g6 19.Ne6-d4 Bf8-b4 20.Nf5-e7+ Kg6-h6 21.Nd4-f5+
 53/41	4:59:28	387,933,849k	21,590k	+M21	1.Ke1-f2 b4-b3 2.Be2-f1+ Kh3-g4 3.Nf5-e3+ Kg4-h5 4.g3-g4+ Kh5-h6 5.Ne3-f5+ Kh6-g6 6.Bf1-c4 h4-h3 7.Bc4-d3 b7-b6 8.Bd3-b1 d6-d5 9.Kf2-e3 d5-d4+ 10.Ke3-e4 d4-d3 11.Bb1xd3 b6-b5 12.Ke4-d5 b5-b4 13.Kd5-c6 b3-b2 14.Kc6-d7 b2-b1Q 15.Bd3xb1 b4-b3 16.Kd7-e8 b3-b2 17.Nf5xe7+ Kg6-h6 18.Ne7-f5+ Kh6-g6 19.Ne6-d4 Rf7-c7 20.Nf5-e7+ Kg6-h6 21.Nd4-f5+
 54/41	5:36:02	437,429,253k	21,695k	+M21	1.Ke1-f2 b4-b3 2.Be2-f1+ Kh3-g4 3.Nf5-e3+ Kg4-h5 4.g3-g4+ Kh5-h6 5.Ne3-f5+ Kh6-g6 6.Bf1-c4 h4-h3 7.Bc4-d3 b7-b6 8.Bd3-b1 d6-d5 9.Kf2-e3 d5-d4+ 10.Ke3-e4 b6-b5 11.Ke4-d5 b5-b4 12.Kd5-c6 b3-b2 13.Kc6-d7 d4-d3 14.Bb1xd3 b2-b1Q 15.Bd3xb1 b4-b3 16.Kd7-e8 b3-b2 17.Nf5xe7+ Kg6-h6 18.Ne7-f5+ Kh6-g6 19.Ne6-d4 Rf7-c7 20.Nf5-e7+ Kg6-h6 21.Nd4-f5+
 55/41	6:52:16	540,652,085k	21,857k	+M21	1.Ke1-f2 b4-b3 2.Be2-f1+ Kh3-g4 3.Nf5-e3+ Kg4-h5 4.g3-g4+ Kh5-h6 5.Ne3-f5+ Kh6-g6 6.Bf1-c4 h4-h3 7.Bc4-d3 b7-b6 8.Bd3-b1 d6-d5 9.Kf2-e3 b3-b2 10.Ke3-d4 b6-b5 11.Kd4-c5 b5-b4 12.Kc5-c6 d5-d4 13.Kc6-d7 d4-d3 14.Bb1xd3 b2-b1Q 15.Bd3xb1 b4-b3 16.Kd7-e8 b3-b2 17.Nf5xe7+ Kg6-h6 18.Ne7-f5+ Kh6-g6 19.Ne6-d4 Rf7-c7 20.Nf5-e7+ Kg6-h6 21.Nd4-f5+
 56/51	6:53:14	541,908,853k	21,856k	+M21	1.Ke1-f2 b4-b3 2.Be2-f1+ Kh3-g4 3.Nf5-e3+ Kg4-h5 4.g3-g4+ Kh5-h6 5.Ne3-f5+ Kh6-g6 6.Bf1-c4 h4-h3 7.Bc4-d3 b7-b6 8.Bd3-b1 d6-d5 9.Kf2-e3 d5-d4+ 10.Ke3-e4 b6-b5 11.Ke4-d5 b5-b4 12.Kd5-c6 b3-b2 13.Kc6-d7 d4-d3 14.Bb1xd3 b2-b1Q 15.Bd3xb1 b4-b3 16.Kd7-e8 b3-b2 17.Nf5xe7+ Kg6-h6 18.Ne7-f5+ Kh6-g6 19.Ne6-d4 Rf7-c7 20.Nf5-e7+ Kg6-h6 21.Nd4-f5+
 57/51	7:21:24	580,427,937k	21,916k	+M21	1.Ke1-f2 b4-b3 2.Be2-f1+ Kh3-g4 3.Nf5-e3+ Kg4-h5 4.g3-g4+ Kh5-h6 5.Ne3-f5+ Kh6-g6 6.Bf1-c4 h4-h3 7.Bc4-d3 b7-b6 8.Bd3-b1 d6-d5 9.Kf2-e3 d5-d4+ 10.Ke3-e4 b6-b5 11.Ke4-d5 b5-b4 12.Kd5-c6 b3-b2 13.Kc6-d7 d4-d3 14.Bb1xd3 b2-b1Q 15.Bd3xb1 b4-b3 16.Kd7-e8 b3-b2 17.Nf5xe7+ Kg6-h6 18.Ne7-f5+ Kh6-g6 19.Ne6-d4 Rf7-c7 20.Nf5-e7+ Kg6-h6 21.Nd4-f5+
[pgn][Event "Mate in 20 (or21?)"] [Site "WORKSTATION-PC"] [Date "2024.02.06"] [Round "?"] [White "Crystallite 1.1a-bmi2"] [Black "?"] [Result "1-0"] [Time "21:51:59"] [TimeControl "0"] [SetUp "1"] [FEN "5bb1/1p2prrn/3pNp2/5Np1/1p5p/6Pk/4B2P/4K3 w - - 0 1"] [Termination "normal"] [PlyCount "41"] [WhiteType "program"] [BlackType "program"] 1. Kf2 {+M21/57 26485 Crystallite 1.1a-bmi2} b3 2. Bf1+ Kg4 3. Ne3+ Kh5 4. g4+ Kh6 5. Nf5+ Kg6 6. Bc4 h3 7. Bd3 b6 8. Bb1 d5 9. Ke3 d4+ 10. Ke4 b5 11. Kd5 b4 12. Kc6 b2 13. Kd7 d3 14. Bxd3 b1=Q 15. Bxb1 b3 16. Ke8 b2 17. Nxe7+ Kh6 18. Nf5+ Kg6 19. Ned4 Rc7 20. Ne7+ Kh6 21. Ndf5# 1-0 [/pgn]

I'll see what Crystallite can do with the Blathy mate in 25 problem while I'm at work.
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Ignacio
Posts: 178
Joined: Wed Mar 08, 2006 8:15 pm

Re: Mate in 21

Post by Ignacio »

peter wrote: ↑Tue Feb 06, 2024 1:54 pm
acase wrote: ↑Tue Feb 06, 2024 3:13 am I have never found any engine that can get the mate in 25
Well, to "get it" isn't any problem for Huntsman letting him go backward your line:

4bnrq/3pP1pk/3Pp1n1/4p3/6N1/p1pB1P2/PbPpPP2/3N3K w - - 0 1

Analysis by The Huntsman 1:

1.Le4 Lf7 2.e3 Le8 3.Kg2 Lf7 4.Kf1 La1 5.Ke2 Lb2 6.Kd3 Le8 7.Kc4 Lf7 8.Kb5 Lc1 9.Kc5 Lb2 10.Kb6 Le8 11.Kc7 Lf7 12.Kd8 Lc1 13.e8S Lxe8 14.Kxe8 Lb2 15.f4 exf4 16.exf4 La1 17.Ld3 Lb2 18.Kf7 La1 19.f3 e5 20.Le4 Lb2 21.fxe5 Lc1 22.e6 dxe6 23.d7 e5 24.d8D Se6 25.Lxg6#
Weiß setzt Matt.
+- (#25) Tiefe: 103/50 00:02:48 5852MN

Didn't give much time to the engine started from empty hash at root, maybe it would make any DTM- output overnight yet too, but that's always the point with such positions using them for testing engines with, does any winning eval with a thematically correct (?) output- line count as solved or only the best DTM (if known at all for sure) with the full line to mate?

Gustav with 3 flights is only in depth 15 after half an hour, so I didn't let him go on trying from very starting position neither.
After first 10 moves with (from there onwards) 0 flights it gets the rest in about 3 minutes.
1.Le4 Lf7 2.e3 Le8 3.Kg2 Lf7 4.Kf1 La1 5.Ke2 Lb2 6.Kd3 Le8 7.Kc4 Lf7 8.Kb5 Lc1 9.Kc5 Lb2 10.Kb6 Le8 [d]4bnrq/3pP1pk/1K1Pp1n1/4p3/4B1N1/p1p1PP2/PbPp1P2/3N4 w - - 0 11 1.Kb6-c7 Lb2-a1 2.Kc7-d8 Le8-f7 3.e7-e8D Lf7-e8 4.Kd8-e8 La1-b2 5.Bf3-f4 Be5-f4 6.Be3-f4 Lb2-a1 7.Bf2-f3 La1-b2 8.Le4-d3 Lb2-a1 9.Ke8-f7 Be6-e5 10.Ld3-e4 La1-b2 (5)
Gustav (with f0, z4 and aus 1) finds mate in 25 in 27 seconds.
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acase
Posts: 994
Joined: Wed Mar 15, 2006 1:14 am
Location: Columbus, Ohio USA
Full name: Andrew R Case

Re: Mate in 21

Post by acase »

Ignacio wrote: ↑Wed Feb 07, 2024 6:22 pm
peter wrote: ↑Tue Feb 06, 2024 1:54 pm
acase wrote: ↑Tue Feb 06, 2024 3:13 am I have never found any engine that can get the mate in 25
Well, to "get it" isn't any problem for Huntsman letting him go backward your line:

4bnrq/3pP1pk/3Pp1n1/4p3/6N1/p1pB1P2/PbPpPP2/3N3K w - - 0 1

Analysis by The Huntsman 1:

1.Le4 Lf7 2.e3 Le8 3.Kg2 Lf7 4.Kf1 La1 5.Ke2 Lb2 6.Kd3 Le8 7.Kc4 Lf7 8.Kb5 Lc1 9.Kc5 Lb2 10.Kb6 Le8 11.Kc7 Lf7 12.Kd8 Lc1 13.e8S Lxe8 14.Kxe8 Lb2 15.f4 exf4 16.exf4 La1 17.Ld3 Lb2 18.Kf7 La1 19.f3 e5 20.Le4 Lb2 21.fxe5 Lc1 22.e6 dxe6 23.d7 e5 24.d8D Se6 25.Lxg6#
Weiß setzt Matt.
+- (#25) Tiefe: 103/50 00:02:48 5852MN

Didn't give much time to the engine started from empty hash at root, maybe it would make any DTM- output overnight yet too, but that's always the point with such positions using them for testing engines with, does any winning eval with a thematically correct (?) output- line count as solved or only the best DTM (if known at all for sure) with the full line to mate?

Gustav with 3 flights is only in depth 15 after half an hour, so I didn't let him go on trying from very starting position neither.
After first 10 moves with (from there onwards) 0 flights it gets the rest in about 3 minutes.
1.Le4 Lf7 2.e3 Le8 3.Kg2 Lf7 4.Kf1 La1 5.Ke2 Lb2 6.Kd3 Le8 7.Kc4 Lf7 8.Kb5 Lc1 9.Kc5 Lb2 10.Kb6 Le8 [d]4bnrq/3pP1pk/1K1Pp1n1/4p3/4B1N1/p1p1PP2/PbPp1P2/3N4 w - - 0 11 1.Kb6-c7 Lb2-a1 2.Kc7-d8 Le8-f7 3.e7-e8D Lf7-e8 4.Kd8-e8 La1-b2 5.Bf3-f4 Be5-f4 6.Be3-f4 Lb2-a1 7.Bf2-f3 La1-b2 8.Le4-d3 Lb2-a1 9.Ke8-f7 Be6-e5 10.Ld3-e4 La1-b2 (5)
Gustav (with f0, z4 and aus 1) finds mate in 25 in 27 seconds.
Thanks, unfortunately I don't have the mate finder Gustav.
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peter
Posts: 3410
Joined: Sat Feb 16, 2008 7:38 am
Full name: Peter Martan

Re: Mate in 21

Post by peter »

Ignacio wrote: ↑Wed Feb 07, 2024 6:22 pm Gustav (with f0, z4 and aus 1) finds mate in 25 in 27 seconds.
z4 means max. 4 black moves and aus1 = one exception?
With these parameters and f0 Gustav says no mate in 25 at my trial, regards
Peter.
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peter
Posts: 3410
Joined: Sat Feb 16, 2008 7:38 am
Full name: Peter Martan

Re: Mate in 21

Post by peter »

peter wrote: ↑Wed Feb 07, 2024 10:47 pm
Ignacio wrote: ↑Wed Feb 07, 2024 6:22 pm Gustav (with f0, z4 and aus 1) finds mate in 25 in 27 seconds.
z4 means max. 4 black moves and aus1 = one exception?
With these parameters and f0 Gustav says no mate in 25 at my trial, regards
Have to apologize, mistyped parameters or fen in Gustav before as it seems, tried again:

Code: Select all

*****  Gustav 4.2 e   64 Bit  *****    Berechnung beendet am  8.2.2024  01:12

Matt in 25 Zügen, Weiß beginnt, ,   

Lösung gefunden bei folgenden Parametern: 
Fluchtfelder: 0, max. Zugzahl Schwarz: 4, Ausnahmen: 1
alle Lösungen suchen / keine Duale in Kurzvarianten anzeigen / Lösungstiefe: 10
Zugzahl unbekannt / Hashtabelle: 8192 MB

Lösezeit:  :                48,24 s        Zaehler: 8.725492

1.Ld3-e4 Lb2-a1 2.Kh1-g1 La1-b2 3.Kg1-f1 Lb2-a1 4.Be2-e3 La1-b2 5.Kf1-e2 Lb2-a1 6.Ke2-d3 La1-b2 7.Kd3-c4 Lb2-a1 8.Kc4-b4 La1-b2 9.Kb4-a5 Lb2-a1 10.Ka5-b6 La1-b2 (15)
Peter.
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