Will black mate here ?

[MOBMAT]

Analysis by CF 041020 x64 SSE41 N:

1. -+ (-#22): 1...Nd3 2.b4 c6 3.Kh7 Kf7 4.Kh8 Nb2 5.Kh7 Nc4 6.Kh8 Na3 7.Kh7 Nb5 8.c4 Nxd4 9.a4 Nb3 10.Kh8 c5 11.bxc5 Nxc5 12.a5 Nb7 13.a6 Nc5 14.Kh7 Nxa6 15.Kh8 Nc5 16.Kh7 a5 17.Kh8 a4 18.Kh7 Nd7 19.Kh8 a3 20.c5 a2 21.Kh7 a1Q 22.c6 Nf8#

Oh that's annoying, I only got to mate in 25 so far

Update: mate in 23

As shown above, it is mate in 22.

Code: Select all

FEN: 5k1K/p1p5/7P/7P/3P4/2P5/PP6/4n3 b - - 0 1

Houdini 6 (N6):
 ...
 55	29:56	13,756,330,906	7,658,000	+M23	1. ... Nd3 2.b4 Nc1 3.a4 Na2 4.d5 Nxc3 5.d6 cxd6 6.b5 d5 7.b6 axb6 8.a5 Nb5 9.Kh7 bxa5 10.Kg6 Kg8 11.Kf5 a4 12.Ke5 d4 13.Ke4 a3 14.h7+ Kxh7
 55	35:31	16,310,753,998	7,653,000	+M23	1. ... Nd3 2.b4 Nc1 3.a4 Na2 4.d5 Nxc3 5.d6 cxd6 6.b5 d5 7.b6 axb6 8.a5 Nb5 9.Kh7 bxa5 10.Kg6 Kg8 11.Kf5 a4 12.Ke5 d4 13.Ke4 a3 14.h7+ Kxh7
 56	38:05	17,434,539,813	7,628,000	+M22	1. ... Nd3 2.b4 c6 3.Kh7 Kf7 4.Kh8 Nb2 5.Kh7 Nc4 6.Kh8 Na3 7.Kh7 Nb5 8.c4 Nxd4 9.a4 Nb3 10.c5 Nd4 11.Kh8 Ne6 12.b5 Nxc5 13.bxc6 Nxa4 14.Kh7 a5 15.Kh8 Nb6 16.Kh7 a4 17.Kh8 a3 18.Kh7 Nc8 19.Kh8 a2 20.c7 a1Q+ 21.Kh7 Qa6 22.Kh8 Qxh6+
 56	43:45	20,139,607,142	7,671,000	+M22	1. ... Nd3 2.b4 c6 3.Kh7 Kf7 4.Kh8 Nb2 5.Kh7 Nc4 6.Kh8 Na3 7.Kh7 Nb5 8.c4 Nxd4 9.a4 Nb3 10.c5 Nd4 11.Kh8 Ne6 12.b5 Nxc5 13.bxc6 Nxa4 14.Kh7 a5 15.Kh8 Nb6 16.Kh7 a4 17.Kh8 a3 18.Kh7 Nc8 19.Kh8 a2 20.c7 a1Q+ 21.Kh7 Qa6 22.Kh8 Qxh6+
 57	44:30	20,500,298,861	7,677,000	+M22	1. ... Nd3 2.b4 c6 3.Kh7 Kf7 4.Kh8 Nb2 5.Kh7 Nc4 6.Kh8 Na3 7.Kh7 Nb5 8.c4 Nxd4 9.a4 Nb3 10.c5 Nd4 11.Kh8 Ne6 12.b5 Nxc5 13.bxc6 Nxa4 14.Kh7 a5 15.Kh8 Nb6 16.Kh7 a4 17.Kh8 a3 18.Kh7 Nc8 19.Kh8 a2 20.c7 a1Q+ 21.Kh7 Qa6 22.Kh8 Qxh6+
 57	49:19	22,779,934,740	7,696,000	+M22	1. ... Nd3 2.b4 c6 3.Kh7 Kf7 4.Kh8 Nb2 5.Kh7 Nc4 6.Kh8 Na3 7.Kh7 Nb5 8.c4 Nxd4 9.a4 Nb3 10.c5 Nd4 11.Kh8 Ne6 12.b5 Nxc5 13.bxc6 Nxa4 14.Kh7 a5 15.Kh8 Nb6 16.Kh7 a4 17.Kh8 a3 18.Kh7 Nc8 19.Kh8 a2 20.c7 a1Q+ 21.Kh7 Qa6 22.Kh8 Qxh6+
 58	50:37	23,181,097,228	7,631,000	+M22	1. ... Nd3 2.b4 c6 3.Kh7 Kf7 4.Kh8 Nb2 5.Kh7 Nc4 6.Kh8 Na3 7.Kh7 Nb5 8.c4 Nxd4 9.a4 Nb3 10.c5 Nd4 11.Kh8 Ne6 12.b5 Nxc5 13.bxc6 Nxa4 14.c7 Nb6 15.Kh7 Nc8 16.Kh8 a5 17.Kh7 a4 18.Kh8 a3 19.Kh7 a2 20.Kh8 a1Q+ 21.Kh7 Qa6 22.Kh8 Qxh6+
 58	57:49	26,310,017,748	7,582,000	+M22	1. ... Nd3 2.b4 c6 3.Kh7 Kf7 4.Kh8 Nb2 5.Kh7 Nc4 6.Kh8 Na3 7.Kh7 Nb5 8.c4 Nxd4 9.a4 Nb3 10.c5 Nd4 11.Kh8 Ne6 12.b5 Nxc5 13.bxc6 Nxa4 14.c7 Nb6 15.Kh7 Nc8 16.Kh8 a5 17.Kh7 a4 18.Kh8 a3 19.Kh7 a2 20.Kh8 a1Q+ 21.Kh7 Qa6 22.Kh8 Qxh6+
 59	59:21	26,758,907,181	7,513,000	+M22	1. ... Nd3 2.b4 c6 3.Kh7 Kf7 4.Kh8 Nb2 5.Kh7 Nc4 6.Kh8 Na3 7.Kh7 Nb5 8.c4 Nxd4 9.a4 Nb3 10.c5 Nd4 11.Kh8 Ne6 12.b5 Nxc5 13.bxc6 Nxa4 14.c7 Nb6 15.Kh7 Nc8 16.Kh8 a5 17.Kh7 a4 18.Kh8 a3 19.Kh7 a2 20.Kh8 a1Q+ 21.Kh7 Qa6 22.Kh8 Qxh6+
 59	1:09:48	30,605,090,230	7,307,000	+M22	1. ... Nd3 2.b4 c6 3.Kh7 Kf7 4.Kh8 Nb2 5.Kh7 Nc4 6.Kh8 Na3 7.Kh7 Nb5 8.c4 Nxd4 9.a4 Nb3 10.c5 Nd4 11.Kh8 Ne6 12.b5 Nxc5 13.bxc6 Nxa4 14.c7 Nb6 15.Kh7 Nc8 16.Kh8 a5 17.Kh7 a4 18.Kh8 a3 19.Kh7 a2 20.Kh8 a1Q+ 21.Kh7 Qa6 22.Kh8 Qxh6+
 60	1:12:19	31,421,126,970	7,240,000	+M22	1. ... Nd3 2.b4 c6 3.Kh7 Kf7 4.Kh8 Nb2 5.Kh7 Nc4 6.Kh8 Na3 7.Kh7 Nb5 8.c4 Nxd4 9.a4 Nb3 10.c5 Nd4 11.Kh8 Ne6 12.b5 Nxc5 13.bxc6 Nxa4 14.c7 Nb6 15.Kh7 Nc8 16.Kh8 a5 17.Kh7 a4 18.Kh8 a3 19.Kh7 a2 20.Kh8 a1Q+ 21.Kh7 Qa6 22.Kh8 Qxh6+
 60	1:45:13	45,845,362,134	7,261,000	+M22	1. ... Nd3 2.b4 c6 3.Kh7 Kf7 4.Kh8 Nb2 5.Kh7 Nc4 6.Kh8 Na3 7.Kh7 Nb5 8.c4 Nxd4 9.a4 Nb3 10.c5 Nd4 11.Kh8 Ne6 12.b5 Nxc5 13.bxc6 Nxa4 14.c7 Nb6 15.Kh7 Nc8 16.Kh8 a5 17.Kh7 a4 18.Kh8 a3 19.Kh7 a2 20.Kh8 a1Q+ 21.Kh7 Qa6 22.Kh8 Qxh6+
 61	1:47:47	47,063,198,052	7,277,000	+M22	1. ... Nd3 2.b4 c6 3.Kh7 Kf7 4.Kh8 Nb2 5.Kh7 Nc4 6.Kh8 Na3 7.Kh7 Nb5 8.c4 Nxd4 9.a4 Nb3 10.c5 Nd4 11.Kh8 Ne6 12.b5 Nxc5 13.bxc6 Nxa4 14.Kh7 Nb6 15.c7 a5 16.Kh8 Nc8 17.Kh7 a4 18.Kh8 a3 19.Kh7 a2 20.Kh8 a1Q+ 21.Kh7 Qa6 22.Kh8 Qxh6+
 61	1:56:46	51,247,053,009	7,314,000	+M22	1. ... Nd3 2.b4 c6 3.Kh7 Kf7 4.Kh8 Nb2 5.Kh7 Nc4 6.Kh8 Na3 7.Kh7 Nb5 8.c4 Nxd4 9.a4 Nb3 10.c5 Nd4 11.Kh8 Ne6 12.b5 Nxc5 13.bxc6 Nxa4 14.Kh7 Nb6 15.c7 a5 16.Kh8 Nc8 17.Kh7 a4 18.Kh8 a3 19.Kh7 a2 20.Kh8 a1Q+ 21.Kh7 Qa6 22.Kh8 Qxh6+
 62	1:58:07	51,947,407,228	7,329,000	+M22	1. ... Nd3 2.b4 c6 3.Kh7 Kf7 4.Kh8 Nb2 5.Kh7 Nc4 6.Kh8 Na3 7.Kh7 Nb5 8.c4 Nxd4 9.a4 Nb3 10.c5 Nd4 11.Kh8 Ne6 12.b5 Nxc5 13.bxc6 Nxa4 14.Kh7 Nb6 15.c7 a5 16.Kh8 Nc8 17.Kh7 a4 18.Kh8 a3 19.Kh7 a2 20.Kh8 a1Q+ 21.Kh7 Qa6 22.Kh8 Qxh6+
 62	2:06:48	56,181,879,506	7,384,000	+M22	1. ... Nd3 2.b4 c6 3.Kh7 Kf7 4.Kh8 Nb2 5.Kh7 Nc4 6.Kh8 Na3 7.Kh7 Nb5 8.c4 Nxd4 9.a4 Nb3 10.c5 Nd4 11.Kh8 Ne6 12.b5 Nxc5 13.bxc6 Nxa4 14.Kh7 Nb6 15.c7 a5 16.Kh8 Nc8 17.Kh7 a4 18.Kh8 a3 19.Kh7 a2 20.Kh8 a1Q+ 21.Kh7 Qa6 22.Kh8 Qxh6+
 63	2:07:55	56,698,101,120	7,386,000	+M22	1. ... Nd3 2.b4 c6 3.Kh7 Kf7 4.Kh8 Nb2 5.Kh7 Nc4 6.Kh8 Na3 7.Kh7 Nb5 8.c4 Nxd4 9.a4 Nb3 10.c5 Nd4 11.Kh8 Ne6 12.b5 Nxc5 13.bxc6 Nxa4 14.Kh7 Nb6 15.c7 a5 16.Kh8 Nc8 17.Kh7 a4 18.Kh8 a3 19.Kh7 a2 20.Kh8 a1Q+ 21.Kh7 Qa6 22.Kh8 Qxh6+
 63	2:25:56	67,124,350,796	7,665,000	+M22	1. ... Nd3 2.b4 c6 3.Kh7 Kf7 4.Kh8 Nb2 5.Kh7 Nc4 6.Kh8 Na3 7.Kh7 Nb5 8.c4 Nxd4 9.a4 Nb3 10.c5 Nd4 11.Kh8 Ne6 12.b5 Nxc5 13.bxc6 Nxa4 14.Kh7 Nb6 15.c7 a5 16.Kh8 Nc8 17.Kh7 a4 18.Kh8 a3 19.Kh7 a2 20.Kh8 a1Q+ 21.Kh7 Qa6 22.Kh8 Qxh6+
 64	2:29:10	68,716,665,228	7,677,000	+M22	1. ... Nd3 2.b4 c6 3.Kh7 Kf7 4.Kh8 Nb2 5.Kh7 Nc4 6.Kh8 Na3 7.Kh7 Nb5 8.c4 Nxd4 9.a4 Nb3 10.c5 Nd4 11.Kh8 Ne6 12.b5 Nxc5 13.bxc6 Nxa4 14.Kh7 Nb6 15.c7 a5 16.Kh8 Nc8 17.Kh7 a4 18.Kh8 a3 19.Kh7 a2 20.Kh8 a1Q+ 21.Kh7 Qa6 22.Kh8 Qxh6+
 64	2:43:24	75,310,070,774	7,681,000	+M22	1. ... Nd3 2.b4 c6 3.Kh7 Kf7 4.Kh8 Nb2 5.Kh7 Nc4 6.Kh8 Na3 7.Kh7 Nb5 8.c4 Nxd4 9.a4 Nb3 10.c5 Nd4 11.Kh8 Ne6 12.b5 Nxc5 13.bxc6 Nxa4 14.Kh7 Nb6 15.c7 a5 16.Kh8 Nc8 17.Kh7 a4 18.Kh8 a3 19.Kh7 a2 20.Kh8 a1Q+ 21.Kh7 Qa6 22.Kh8 Qxh6+
 65	2:45:47	76,310,989,441	7,671,000	+M22	1. ... Nd3 2.b4 c6 3.Kh7 Kf7 4.Kh8 Nb2 5.Kh7 Nc4 6.Kh8 Na3 7.Kh7 Nb5 8.c4 Nxd4 9.a4 Nb3 10.c5 Nd4 11.Kh8 Ne6 12.b5 Nxc5 13.bxc6 Nxa4 14.Kh7 Nb6 15.c7 a5 16.Kh8 Nc8 17.Kh7 a4 18.Kh8 a3 19.Kh7 a2 20.Kh8 a1Q+ 21.Kh7 Qa6 22.Kh8 Qxh6+
 65	3:12:20	88,069,660,099	7,631,000	+M22	1. ... Nd3 2.b4 c6 3.Kh7 Kf7 4.Kh8 Nb2 5.Kh7 Nc4 6.Kh8 Na3 7.Kh7 Nb5 8.c4 Nxd4 9.a4 Nb3 10.c5 Nd4 11.Kh8 Ne6 12.b5 Nxc5 13.bxc6 Nxa4 14.Kh7 Nb6 15.c7 a5 16.Kh8 Nc8 17.Kh7 a4 18.Kh8 a3 19.Kh7 a2 20.Kh8 a1Q+ 21.Kh7 Qa6 22.Kh8 Qxh6+
 66	3:17:23	90,287,371,170	7,623,000	+M22	1. ... Nd3 2.b4 c6 3.Kh7 Kf7 4.Kh8 Nb2 5.Kh7 Nc4 6.Kh8 Na3 7.Kh7 Nb5 8.c4 Nxd4 9.a4 Nb3 10.c5 Nd4 11.Kh8 Ne6 12.b5 Nxc5 13.bxc6 Nxa4 14.Kh7 Nb6 15.Kh8 Nc8 16.c7 a5 17.Kh7 a4 18.Kh8 a3 19.Kh7 a2 20.Kh8 a1Q+ 21.Kh7 Qg1 22.Kh8 Qg8+
 66	3:37:31	101,229,122,926	7,755,000	+M22	1. ... Nd3 2.b4 c6 3.Kh7 Kf7 4.Kh8 Nb2 5.Kh7 Nc4 6.Kh8 Na3 7.Kh7 Nb5 8.c4 Nxd4 9.a4 Nb3 10.c5 Nd4 11.Kh8 Ne6 12.b5 Nxc5 13.bxc6 Nxa4 14.Kh7 Nb6 15.Kh8 Nc8 16.c7 a5 17.Kh7 a4 18.Kh8 a3 19.Kh7 a2 20.Kh8 a1Q+ 21.Kh7 Qg1 22.Kh8 Qg8+
 67	3:41:27	103,666,246,414	7,802,000	+M22	1. ... Nd3 2.b4 c6 3.Kh7 Kf7 4.Kh8 Nb2 5.Kh7 Nc4 6.Kh8 Na3 7.Kh7 Nb5 8.c4 Nxd4 9.a4 Nb3 10.c5 Nd4 11.Kh8 Ne6 12.b5 Nxc5 13.bxc6 Nxa4 14.c7 Nb6 15.Kh7 a5 16.Kh8 Nc8 17.Kh7 a4 18.Kh8 a3 19.Kh7 a2 20.Kh8 a1Q+ 21.Kh7 Qc1 22.Kh8 Qxh6+
 67	4:21:09	122,966,522,030	7,847,000	+M22	1. ... Nd3 2.b4 c6 3.Kh7 Kf7 4.Kh8 Nb2 5.Kh7 Nc4 6.Kh8 Na3 7.Kh7 Nb5 8.c4 Nxd4 9.a4 Nb3 10.c5 Nd4 11.Kh8 Ne6 12.b5 Nxc5 13.bxc6 Nxa4 14.c7 Nb6 15.Kh7 a5 16.Kh8 Nc8 17.Kh7 a4 18.Kh8 a3 19.Kh7 a2 20.Kh8 a1Q+ 21.Kh7 Qc1 22.Kh8 Qxh6+
 68	4:24:26	124,324,402,624	7,835,000	+M22	1. ... Nd3 2.b4 c6 3.Kh7 Kf7 4.Kh8 Nb2 5.Kh7 Nc4 6.Kh8 Na3 7.Kh7 Nb5 8.c4 Nxd4 9.a4 Nb3 10.c5 Nd4 11.Kh8 Ne6 12.b5 Nxc5 13.bxc6 Nxa4 14.c7 Nb6 15.Kh7 a5 16.Kh8 Nc8 17.Kh7 a4 18.Kh8 a3 19.Kh7 a2 20.Kh8 a1Q+ 21.Kh7 Qc1 22.Kh8 Qxh6+
 68	4:52:25	139,974,948,792	7,977,000	+M22	1. ... Nd3 2.b4 c6 3.Kh7 Kf7 4.Kh8 Nb2 5.Kh7 Nc4 6.Kh8 Na3 7.Kh7 Nb5 8.c4 Nxd4 9.a4 Nb3 10.c5 Nd4 11.Kh8 Ne6 12.b5 Nxc5 13.bxc6 Nxa4 14.c7 Nb6 15.Kh7 a5 16.Kh8 Nc8 17.Kh7 a4 18.Kh8 a3 19.Kh7 a2 20.Kh8 a1Q+ 21.Kh7 Qc1 22.Kh8 Qxh6+
 69	4:55:23	141,692,328,966	7,994,000	+M22	1. ... Nd3 2.b4 c6 3.Kh7 Kf7 4.Kh8 Nb2 5.Kh7 Nc4 6.Kh8 Na3 7.Kh7 Nb5 8.c4 Nxd4 9.a4 Nb3 10.c5 Nd4 11.Kh8 Ne6 12.b5 Nxc5 13.bxc6 Nxa4 14.c7 Nb6 15.Kh7 Nc8 16.Kh8 a5 17.Kh7 a4 18.Kh8 a3 19.Kh7 a2 20.Kh8 a1Q+ 21.Kh7 Qc1 22.Kh8 Qxh6+