SF Dev need 150s (2.5 min) to find Qh6

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Uri Blass
Posts: 8586
Joined: Wed Mar 08, 2006 11:37 pm
Location: Tel-Aviv Israel

Re: SF Dev need 150s (2.5 min) to find Qh6

Post by Uri Blass » Sun May 19, 2019 9:47 am

There are of course studies that stockfish cannot solve in a reasonable time but usually stockifsh does not get in them depths that are higher than 128

Here is one of them when I used almost the latest version




depth 78 is not enough that is surprising because afer 1.Bf8+ Kh7(only move)
depth 42 is enough for stockfish to see a positive score(note that I used contempt=0 for analysis).


Stockfish_19051511_x64_modern:
1/1 00:00 120 60k -0.55 1.Be5
2/2 00:00 410 205k -0.47 1.Rf8 Qe1 2.Bxf4+ Kg7
3/5 00:00 683 342k -0.47 1.Rf8 Qe1 2.Bxf4+ Kg7
4/6 00:00 1k 658k -0.97 1.Be5 Qe1 2.Bxf4+ Kh7 3.Rf8
5/7 00:00 4k 1,311k -1.39 1.Rh8+ Kg6 2.Rf8 Qe1 3.Bxf4 Qxe2+ 4.Kg3
6/9 00:00 6k 1,452k -1.38 1.Rh8+ Kg6 2.Rg8+ Kh7 3.Rf8 Qe1 4.Rxf4 Qxe2+ 5.Kg3 Qe1+ 6.Kh3
7/11 00:00 11k 2,119k -1.18 1.Rf8 Qe1 2.Rxf4 Qxe2+ 3.Kg3 Qf1 4.Rf8
8/10 00:00 12k 2,020k -0.11 1.Rf8 Qe1 2.Bxf4+ Kg7 3.Rf5
9/13 00:00 20k 2,504k -0.19 1.Rf8 Qe1 2.Bxf4+ Kg6 3.e4 Qc3 4.e5 Qxc5 5.Rf6+ Kg7
10/18 00:00 35k 2,473k -0.19 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kf2 Kg6 4.Rg8+ Kh7 5.Rf8 Qh4+ 6.Kf1 Kg6 7.Rg8+ Kf7 8.Rf8+ Ke6 9.Bxf4
11/18 00:00 50k 2,478k -0.15 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kf2 Kg6 4.Rg8+ Kh7 5.Rf8 Qh4+ 6.Kf1 Qh1+ 7.Kf2 Qa1 8.Rxf4 Kg6 9.Kg3 Kg5
12/14 00:00 62k 2,464k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kf2 Qh2+ 4.Kf1
13/20 00:00 79k 2,617k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kf2 Qh2+ 4.Kf1 Qh3+
14/8 00:00 84k 2,629k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kf2 Qh2+ 4.Kf1
15/23 00:00 104k 2,546k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kf2 Qh2+ 4.Kf1 Qh3+
16/10 00:00 117k 2,546k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kf2 Qh2+ 4.Kf1
17/22 00:00 156k 2,650k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kf2 Qh2+ 4.Kf1 Qh1+ 5.Kf2 Kg6 6.Rxf4 Qa1 7.Re4 Qf6 8.Ra4 Qc3 9.Rh4 Qa3 10.Re4 Qb3 11.Rd4 Qb2 12.Re4
18/22 00:00 189k 2,583k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kf2 Qh2+ 4.Kf1
19/22 00:00 204k 2,588k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kf2 Qh2+ 4.Kf1 Qh1+ 5.Kf2 Qh4+
20/29 00:00 249k 2,622k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kf2 Qh2+ 4.Kf1 Qh1+ 5.Kf2 Qh2+
21/25 00:00 289k 2,648k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kf2 Qh2+ 4.Kf1 Kg6 5.Rxf4 Qh1+ 6.Kf2 Qh2+
22/12 00:00 327k 2,682k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kf2 Qh2+ 4.Kf1
23/12 00:00 446k 2,734k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kf2 Qh2+ 4.Kf1
24/22 00:00 694k 2,991k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kf2 Qh2+ 4.Kf1
25/8 00:00 722k 2,998k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kf2 Qh2+ 4.Kf1
26/8 00:00 917k 3,139k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kf2 Qh2+ 4.Kf1
27/14 00:00 1,085k 3,228k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kf2 Qh2+ 4.Kf1
28/34 00:00 1,706k 3,496k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kg1 Kg6 4.Rxf4 Qg3+ 5.Kf1 Qh3+ 6.Kf2 Qe6 7.Ra4 Qd5 8.Re4 Qf7 9.Rd4 Qa7 10.Kg2 Qa3 11.Re4 Qa2 12.Kg3 Qb3 13.Re5 Qc4 14.e4 Qd4 15.Re6+ Kf7 16.Re5
29/42 00:00 2,754k 3,544k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kg1 Qh4
30/7 00:00 2,784k 3,537k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kg1 Qh4
31/36 00:00 3,320k 3,597k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kg1 Qg3+
32/7 00:01 3,681k 3,633k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kg1 Qg3+
33/68 00:01 6,417k 3,746k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kg1 Kg7 4.Rxf4 Qg3+ 5.Kf1 Qh3+
34/11 00:01 7,300k 3,659k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kg1 Kg7 4.Rxf4 Qg3+ 5.Kf1 Qh3+
35/11 00:02 9,374k 3,729k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kg1 Kg7 4.Rxf4 Qg3+ 5.Kf1 Qh3+
36/11 00:02 11,037k 3,791k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kg1 Qg3+
37/13 00:03 12,660k 3,872k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kg1 Qe6 4.Kf2 Qe3+ 5.Kf1 Qc1+ 6.Kf2
38/12 00:05 20,112k 3,980k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kg1 Qe6 4.Kf2 Qe3+ 5.Kf1 Qc1+ 6.Kf2
39/12 00:05 20,250k 3,981k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kg1 Qe6 4.Kf2 Qe3+ 5.Kf1 Qc1+ 6.Kf2
40/57 00:06 27,234k 4,055k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kg1 Qe6 4.Kf2 Qe3+ 5.Kf1 Qc1+ 6.Kf2
41/7 00:07 28,838k 4,058k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kg1 Qh4
42/7 00:08 35,490k 4,039k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kg1 Qh4
43/7 00:09 38,021k 3,992k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kg1 Qh4
44/7 00:10 39,939k 3,973k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kg1 Qh4
45/7 00:14 55,700k 3,875k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kg1 Qg3+
46/10 00:18 74,068k 3,963k 0.00 1.Rf8 Qg3+ 2.Kf1 Kg7 3.Rxf4 Qh3+ 4.Kf2 Qh2+ 5.Kf1
47/7 00:19 78,181k 3,980k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kg1 Qh4
48/87 00:29 116,017k 3,876k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kg1 Kg6 4.Bxf4 Qh4 5.Kf1 Qh1+ 6.Kf2 Qh4+
49/13 00:30 120,235k 3,879k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kg1 Kg6 4.Bxf4 Qh4 5.Kf1 Qh1+ 6.Kf2 Qh4+
50/13 00:38 151,848k 3,912k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kg1 Kg6 4.Bxf4 Qh4 5.Kf1 Qh1+ 6.Kf2 Qh4+
51/13 00:47 188,153k 3,958k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kg1 Kg6 4.Bxf4 Qh4 5.Kf1 Qh1+ 6.Kf2 Qh4+
52/57 01:06 270,497k 4,046k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kg1 Kg6 4.Bxf4 Qe6 5.Kf2 Qc4 6.Bd6 Qh4+ 7.Kg2 Qg5+ 8.Kf2
53/24 01:15 308,866k 4,081k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kg1 Qg3+
54/10 01:44 430,723k 4,104k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kg1 Qg3+
55/7 01:47 442,012k 4,113k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kg1 Qh4
56/81 03:34 895,348k 4,172k 0.00 1.Rf8 Qg3+ 2.Kf1 Kg7 3.Rxf4 Qh3+ 4.Ke1 Qg2 5.Be5+ Kg8 6.Bd6 Qg1+ 7.Kd2 Kh7 8.Be7 Kg6 9.Rf6+ Kg7 10.Rf4 Qg2 11.Rf5 Qh3 12.Rf4 Kg6 13.Rf6+ Kh7 14.Bd6 Qd7 15.Ke3 Qg7 16.Re6 Qg1+ 17.Ke4 h4 18.Re7+ Kh6 19.Re6+ Kg7 20.Kf5 h3 21.Be5+ Kh7 22.Re7+ Kg8 23.Bd6 h2 24.Re8+ Kg7 25.Re7+ Kh8 26.Re8+ Kh7
57/52 03:50 965,216k 4,188k 0.00 1.Rf8 Qg3+ 2.Kf1 Kg7 3.Rxf4 Qh3+ 4.Ke1 Qg2 5.Be5+ Kg8 6.Bd6
58/23 04:22 1,099,546k 4,193k 0.00 1.Rf8 Qg3+ 2.Kf1 Kg7 3.Rxf4 Qh3+ 4.Ke1 Qg2 5.Be5+ Kg8 6.Bd6 Qg1+ 7.Kd2 Kh7 8.Be7 Kg6 9.Rf6+ Kg7 10.Rf4 Qh2 11.Bd6 Qh3
59/91 05:33 1,405,521k 4,210k 0.00 1.Rf8 Qg3+ 2.Kf1 Kg7 3.Rxf4 Qh3+ 4.Ke1 Qg2 5.Be5+ Kg8 6.Bd6 Qg1+ 7.Kd2 Kh7 8.Be7 Kg6 9.Rf6+ Kg7 10.Rf4 Qb1 11.Bd6 Kg6 12.Re4 Qg1 13.Rf4 Qg5 14.Kd3 Qg2 15.Ke3 Qf1 16.Kd2
60/60 07:20 1,854,912k 4,216k 0.00 1.Rf8 Qg3+ 2.Kf1 Kg7 3.Rxf4 Qh3+ 4.Ke1 Qg2 5.Be5+ Kg8 6.Bd6 Qg1+ 7.Kd2 Qg5 8.Ke3 Qg2 9.Re4 Qg1+ 10.Kd3 Qg6 11.Ke3 Qg2 12.Kf4 Kf7 13.Ke3 Qg1+ 14.Kd3 Qc1 15.Re7+ Kf6 16.Re4 Qd1+ 17.Ke3 Qg1+ 18.Kd3 Qc1 19.Be7+ Kg7 20.Bd6 Qd1+ 21.Ke3 Qg1+ 22.Kf4 h4 23.Re6 h3 24.Kf5 h2 25.Re7+ Kh8 26.Re8+ Kh7 27.Re7+ Kh8
61/44 07:33 1,910,148k 4,215k 0.00 1.Rf8 Qg3+ 2.Kf1 Kg7 3.Rxf4 Qh3+ 4.Ke1 Qg2 5.Be5+ Kg8 6.Bd6
62/52 08:40 2,197,946k 4,223k 0.00 1.Rf8 Qg3+ 2.Kf1 Kg7 3.Rxf4 Qh3+ 4.Ke1 Qg2 5.Be5+ Kg8 6.Bd6 Qg1+ 7.Kd2 Qg5 8.Ke3 Qg2 9.Re4 Qg1+ 10.Kd3 Qg6 11.Ke3
63/10 09:23 2,385,110k 4,231k 0.00 1.Rf8 Qg3+ 2.Kf1 Kg7 3.Rxf4 Qh3+ 4.Kg1 Qg3+
64/32 11:27 2,911,236k 4,236k 0.00 1.Rf8 Qg3+ 2.Kf1 Kg7 3.Rxf4 Qh3+ 4.Ke1 Qg2 5.Be5+ Kg8 6.Bd6 Qg1+ 7.Kd2 Qg6 8.Rf8+ Kg7 9.Rf4 Qg2 10.Ke1 Qg1+ 11.Kd2 Kg8 12.Be7 Qf2 13.Rf8+ Kg7 14.Rf4 Kg6 15.Kd3 Qg1 16.Kd2
65/32 12:58 3,267,309k 4,198k 0.00 1.Rf8 Qg3+ 2.Kf1 Kg7 3.Rxf4 Qh3+ 4.Ke1 Qg2 5.Be5+ Kg8 6.Bd6
66/26 15:35 3,904,090k 4,172k 0.00 1.Rf8 Qg3+ 2.Kf1 Kg7 3.Rxf4 Qh3+ 4.Ke1 Qg2 5.Be5+ Kg8 6.Bd6
67/32 18:04 4,523,658k 4,170k 0.00 1.Rf8 Qg3+ 2.Kf1 Kg7 3.Rxf4 Qh3+ 4.Ke1 Qg2 5.Be5+ Kg8 6.Bd6 Qg1+ 7.Kd2 Kh7 8.Be7 Qb1 9.Re4 Kg6 10.Bd6 Qg1 11.Rf4
68/22 18:39 4,675,494k 4,175k 0.00 1.Rf8 Qg3+ 2.Kf1 Kg7 3.Rxf4 Qh3+ 4.Ke1 Qg2 5.Be5+ Kg8 6.Bd6
69/9 23:23 5,902,223k 4,205k 0.00 1.Rf8 Qg3+ 2.Kf1 Kg7 3.Rxf4 Qh3+ 4.Kg1 Qg3+
70/7 25:37 6,476,260k 4,212k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kg1 Qg3+
71/7 26:46 6,779,942k 4,220k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kg1 Qg3+
72/30 53:52 13,869,337k 4,291k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kg1 h4 4.Rxf4 Qg3+ 5.Kf1 Qh3+
73/11 55:15 14,236,657k 4,294k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kg1 h4 4.Rxf4 Qg3+ 5.Kf1 Qh3+
74/11 59:08 15,241,085k 4,295k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kg1 h4 4.Rxf4 Qg3+ 5.Kf1 Qh3+
75/11 1:12:37 18,748,707k 4,302k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kg1 h4 4.Rxf4 Qg3+ 5.Kf1 Qh3+
76/18 2:04:56 32,870,354k 4,385k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kg1 Qg3+
77/7 2:09:14 33,911,297k 4,373k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kg1 Qg3+
78/7 2:24:18 37,523,224k 4,334k 0.00 1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Kg1 Qh4

acase
Posts: 688
Joined: Wed Mar 15, 2006 12:14 am
Location: Columbus, Ohio USA
Full name: Andrew R Case

Re: SF Dev need 150s (2.5 min) to find Qh6

Post by acase » Sun May 19, 2019 10:10 am

MikeB wrote:
Sun May 19, 2019 2:56 am
acase wrote:
Sun May 19, 2019 1:53 am
Nordlandia wrote:
Wed May 15, 2019 3:01 pm
As further depth require more thinking time. Qh6 ain't considered until about 2 minutes and 30s of analysis time.



Analysis by Stockfish 150519 64 BMI2:

1.Qh6 is winning.
The position is equal: = (0.18 ++) Depth: 59/48 00:02:50 3083MN, tb=31436423
15.05.2019)

i7-5960X, 4.5GHz, 7-cores used.
Takes almost 1 minute on my computer with the latest development version of Stockfish with default settings.


Code: Select all

New game
1b2k1q1/4ppPp/1pK5/3pP3/3P4/1P6/8/2Q5 w - - 0 1

Analysis by Stockfish 170519 64 BMI2:

1.Kb7 f6 2.Kxb8 Kf7+ 3.Kc7 fxe5 4.Qc6 e6 5.Kxb6 Qd8+ 6.Kb5 Qe7 7.dxe5 Kxg7 8.Qc3 Qb7+ 9.Ka4 Qa6+ 10.Kb4 Qb6+ 11.Ka4 Kg6 12.Qd3+ Kg5 
  -/+ (-1.38)  Depth: 13/31   00:00:00  899kN
1.Kb7 f5 2.Kxb8 Kf7+ 3.Kc7 Qxg7 4.Qc6 Qg6 5.Qxd5+ Qe6 6.Qh1 h6 7.Qf1 Ke8 8.Qc4 
  -/+ (-1.00)  Depth: 14/31   00:00:00  1180kN
1.Kb7 f6 2.Qc6+ Kf7 3.Qxd5+ e6 4.Qd7+ Kg6 5.d5 exd5 6.Qg4+ Kf7 7.Qd7+ 
  = (0.00)  Depth: 15/31   00:00:00  2204kN
1.Kb7 f6 2.Qc6+ Kf7 3.Qxd5+ e6 4.Qd7+ Kg6 5.d5 exd5 6.Qg4+ Kf7 7.Qd7+ 
  = (0.00)  Depth: 16/31   00:00:00  2412kN
1.Kb7 f6 2.Qc6+ Kf7 3.Qxd5+ e6 4.Qd7+ Kg6 5.d5 exd5 6.e6 Bh2 7.e7 Qb8+ 8.Ka6 Qa8+ 9.Kb5 Qa5+ 10.Kc6 Qa8+ 
  = (0.00)  Depth: 17/31   00:00:00  2560kN
1.Kb7 f6 2.Qc6+ Kf7 3.Qxd5+ e6 4.Qd7+ Kg6 5.d5 exd5 6.e6 Bh2 7.Kxb6 Bg1+ 8.Kc6 Qa8+ 9.Kb5 Qb8+ 10.Ka4 Qa8+ 
  = (0.00)  Depth: 18/31   00:00:00  2973kN
1.Kb7 f6 2.Qc6+ Kf7 3.Qxd5+ e6 4.Qd7+ Kg6 5.d5 exd5 6.e6 Bh2 7.e7 Qb8+ 8.Kc6 Qa8+ 9.Kxb6 Qb8+ 10.Kc6 Qa8+ 
  = (0.00)  Depth: 19/31   00:00:00  3027kN
1.Kb7 f6 2.Qc6+ Kf7 3.Qxd5+ e6 4.Qd7+ Kg6 5.d5 exd5 6.e6 Bh2 7.e7 Qb8+ 8.Kc6 Qa8+ 9.Kxb6 Qb8+ 10.Kc6 Qa8+ 
  = (0.00)  Depth: 20/31   00:00:00  3339kN
1.Kb7 f6 2.Qc6+ Kf7 3.Qxd5+ e6 4.Qd7+ Kg6 5.d5 exd5 6.e6 Bg3 7.e7 Qb8+ 8.Ka6 Qa8+ 9.Kb5 Qa5+ 10.Kc6 Qa8+ 11.Kxb6 Bf2+ 12.Kb5 Qb8+ 13.Ka4 Qa8+ 
  = (0.00)  Depth: 21/42   00:00:00  3930kN
1.Kb7 f6 2.Qc6+ Kf7 3.Qxd5+ e6 4.Qd7+ Kg6 5.d5 exd5 6.e6 Bg3 7.e7 Qb8+ 8.Ka6 Qa8+ 9.Kb5 Qa5+ 10.Kc6 Qa8+ 11.Kxb6 Bf2+ 12.Kb5 Qb8+ 13.Ka4 Qa8+ 
  = (0.00)  Depth: 22/42   00:00:00  4854kN
1.Kb7 f5 2.Qh6 e6 3.Qf6 f4 4.Kxb8 f3 5.Kb7 Qf7+ 6.Kc6 Qxf6 7.g8Q+ Qf8 8.Qxe6+ Qe7 9.Qc8+ Qd8 10.Qf5 Qa8+ 11.Kxb6 Qb8+ 12.Kc6 Qa8+ 13.Kb5 Qb8+ 
  = (0.00)  Depth: 23/42   00:00:00  6066kN
1.Kb7 f5 2.Qh6 e6 3.Qf6 f4 4.Kxb8 f3 5.Kb7 Qf7+ 6.Kc6 Qxf6 7.g8Q+ Qf8 8.Qxe6+ Qe7 9.Qc8+ Qd8 10.Qf5 Qa8+ 11.Kxb6 Qb8+ 12.Kc6 Qa8+ 13.Kc7 Qd8+ 14.Kc6 
  = (0.00)  Depth: 24/42   00:00:00  10145kN
1.Kb7 f5 2.Qh6 e6 3.Qf6 f4 4.Kxb8 f3 5.Kc7 Qf7+ 6.Kc6 Qxf6 7.g8Q+ Qf8 8.Qxe6+ Qe7 9.Qc8+ Qd8 10.Qf5 Qa8+ 11.Kxb6 Qb8+ 12.Kc6 Qa8+ 13.Kb6 
  = (0.00)  Depth: 25/49   00:00:00  11293kN
1.Kb7 f5 2.Qh6 e6 3.Qf6 f4 4.Kxb8 f3 5.Kb7 Qf7+ 6.Kc6 Qxf6 7.g8Q+ Qf8 8.Qxe6+ Qe7 9.Qc8+ Qd8 10.Qf5 Qa8+ 11.Kxb6 Qb8+ 12.Kc6 Qa8+ 
  = (0.00)  Depth: 26/25   00:00:00  15325kN
1.Kb7 f5 2.Qh6 e6 3.Qf6 f4 4.Kxb8 f3 5.Kb7 Qf7+ 6.Kc6 Qxf6 7.g8Q+ Qf8 8.Qxe6+ Qe7 9.Qxd5 f2 10.Qg8+ Qf8 11.Qe6+ Qe7 
  = (0.00)  Depth: 27/23   00:00:01  18710kN
1.Kb7 f5 2.Qh6 e6 3.Qf6 f4 4.Kxb8 f3 5.b4 f2 6.Kc7 Qf7+ 7.Kc6 Qxf6 8.g8Q+ Qf8 9.Qxe6+ Qe7 10.Qc8+ Qd8 11.Qe6+ 
  = (0.00)  Depth: 28/22   00:00:01  20194kN
1.Kb7 f5 2.Qh6 e6 3.Qf6 f4 4.Kxb8 f3 5.b4 f2 6.Kc7 Qf7+ 7.Kc8 Qxf6 8.g8Q+ Qf8 9.Qxe6+ Qe7 10.Qg8+ Qf8 
  = (0.00)  Depth: 29/27   00:00:01  24186kN
1.Kb7 f5 2.Qh6 e6 3.Qf6 f4 4.Kxb8 f3 5.b4 f2 6.Qxf2 Qxg7 7.b5 Qe7 8.Qc2 h5 9.Qg6+ Kd8 10.Qxh5 Qc7+ 11.Ka8 Qc8+ 12.Ka7 Qc7+ 
  = (0.00)  Depth: 30/38   00:00:01  31286kN
1.Kb7 f5 2.Qh6 e6 3.Qf6 f4 4.Kxb8 f3 5.b4 f2 6.Qxf2 Qxg7 7.b5 Qe7 8.Qc2 h5 9.Qg6+ Kd8 10.Qg8+ Qe8 11.Qh7 Qxb5 12.Qxh5 Qc6 13.Qh8+ Qe8 14.Qg7 Qc6 
  = (0.00)  Depth: 31/38   00:00:01  40342kN
1.Kb7 f5 2.Qh6 e6 3.Qf6 f4 4.Kxb8 f3 5.b4 f2 6.Qxf2 Qxg7 7.b5 Qe7 8.Qc2 h5 9.Qg6+ Kd8 10.Qg8+ Qe8 11.Qg5+ Qe7 12.Qxh5 Qc7+ 13.Ka8 Qc8+ 14.Ka7 Qc7+ 
  = (0.00)  Depth: 32/38   00:00:01  44412kN
1.Kb7 f5 2.Qh6 e6 3.Qf6 f4 4.Kxb8 f3 5.b4 f2 6.Qxf2 Qxg7 7.b5 Qe7 8.Qc2 h5 9.Qg6+ Kd8 10.Qg8+ Qe8 11.Qg5+ Qe7 12.Qxh5 Qc7+ 13.Ka8 Qc8+ 14.Ka7 Qc7+ 
  = (0.00)  Depth: 33/38   00:00:01  55608kN
1.Kb7 f5 2.Qh6 e6 3.Qf6 f4 4.Kxb8 f3 5.b4 f2 6.Qxf2 Qxg7 7.b5 Qe7 8.Qc2 h5 9.Qg6+ Kd8 10.Qg8+ Qe8 11.Qg5+ Qe7 12.Qxh5 Qc7+ 13.Ka8 Qc8+ 14.Ka7 Qc7+ 
  = (0.00)  Depth: 34/38   00:00:02  61192kN
1.Kb7 f5 2.Qh6 e6 3.Qf6 f4 4.Kxb8 f3 5.b4 f2 6.Qxf2 Qxg7 7.b5 Qe7 8.Qc2 h5 9.Qg6+ Kd8 10.Qg8+ Qe8 11.Qg5+ Qe7 12.Qxh5 Qc7+ 13.Ka8 Qc8+ 14.Ka7 Qc7+ 
  = (0.00)  Depth: 35/38   00:00:02  67024kN
1.Kb7 f5 2.Qh6 e6 3.Qf6 f4 4.Kxb8 f3 5.b4 f2 6.Qxf2 Qxg7 7.b5 Qe7 8.Qc2 h5 9.Qg6+ Kd8 10.Qg8+ Qe8 11.Qg5+ Qe7 12.Qxh5 Qc7+ 13.Ka8 Qc8+ 14.Ka7 Qc7+ 
  = (0.00)  Depth: 36/38   00:00:02  82216kN
1.Kb7 f5 2.Qh6 e6 3.Qf6 f4 4.Kxb8 f3 5.b4 f2 6.Qxf2 Qxg7 7.b5 Qe7 8.Qc2 h5 9.Qg6+ Kd8 10.Qg8+ Qe8 11.Qg5+ Qe7 12.Qxh5 Qc7+ 13.Ka8 Qc8+ 14.Ka7 Qc7+ 
  = (0.00)  Depth: 37/37   00:00:03  97512kN
1.Kb7 f5 2.Qh6 e6 3.Qf6 f4 4.Kxb8 f3 5.b4 f2 6.Qxf2 Qxg7 7.b5 Qe7 8.Qc2 h5 9.Qg6+ Kd8 10.Qg8+ Qe8 11.Qg5+ Qe7 12.Qxh5 Qc7+ 13.Ka8 Qc8+ 14.Ka7 Qc7+ 
  = (0.00)  Depth: 38/45   00:00:03  127MN
1.Kb7 f5 2.Qh6 e6 3.Qf6 f4 4.Kxb8 f3 5.b4 f2 6.Qxf2 Qxg7 7.b5 Qe7 8.Qc2 h5 9.Qg6+ Kd8 10.Qg8+ Qe8 11.Qg5+ Qe7 12.Qxh5 Qc7+ 13.Ka8 Qc8+ 14.Ka7 Qc7+ 
  = (0.00)  Depth: 39/37   00:00:04  169MN
1.Kb7 f5 2.Qh6 e6 3.Qf6 f4 4.Kxb8 f3 5.b4 f2 6.Qxf2 Qxg7 7.b5 Qe7 8.Qc2 h5 9.Qg6+ Kd8 10.Qg8+ Qe8 11.Qg5+ Qe7 12.Qxh5 Qc7+ 13.Ka8 Qc8+ 14.Ka7 Qc7+ 
  = (0.00)  Depth: 40/37   00:00:05  179MN
1.Kb7 f5 2.Qh6 e6 3.Qf6 f4 4.Kxb8 f3 5.b4 f2 6.Qxf2 Qxg7 7.b5 Qe7 8.Qc2 h5 9.Qg6+ Kd8 10.Qg8+ Qe8 11.Qg5+ Qe7 12.Qxh5 Qc7+ 13.Ka8 Qc8+ 14.Ka7 Qc7+ 15.Ka6 Qc8+ 16.Kxb6 Qc7+ 17.Ka6 Qc8+ 18.Ka5 Qc3+ 19.Kb6 
  = (0.00)  Depth: 41/38   00:00:06  224MN
1.Kb7 f5 2.Qh6 e6 3.Qf6 f4 4.Kxb8 f3 5.b4 f2 6.Qxf2 Qxg7 7.b5 Qe7 8.Qc2 h5 9.Qg6+ Kd8 10.Qg8+ Qe8 11.Qg7 Qe7 12.Qh8+ Qe8 
  = (0.00)  Depth: 42/25   00:00:08  305MN
1.Kb7 f5 2.Qh6 e6 3.Qf6 f4 4.Kxb8 f3 5.b4 f2 6.Qxf2 Qxg7 7.b5 Qe7 8.Qc2 h5 9.Qg6+ Kd8 10.Qg8+ Qe8 11.Qg5+ Qe7 12.Qxh5 Qc7+ 13.Ka8 Qc8+ 14.Ka7 Qc7+ 15.Ka6 Qc8+ 16.Kxb6 Qc7+ 17.Ka6 Qc8+ 18.Ka5 Qc3+ 19.Ka6 
  = (0.00)  Depth: 43/38   00:00:10  379MN
1.Kb7 f5 2.Qh6 e6 3.Qf6 f4 4.Kxb8 f3 5.b4 f2 6.Qxf2 Qxg7 7.b5 Qe7 8.Qc2 h5 9.Qg6+ Kd8 10.Qg8+ Qe8 11.Qg5+ Qe7 12.Qxh5 Qc7+ 13.Ka8 Qc8+ 14.Ka7 Qc7+ 15.Ka6 Qc8+ 16.Kxb6 Qc7+ 17.Ka6 Qc8+ 18.Ka5 Qc3+ 19.Ka6 
  = (0.00)  Depth: 44/31   00:00:17  661MN
1.Kb7 f5 2.Qh6 e6 3.Qf6 f4 4.Kxb8 f3 5.b4 f2 6.Qxf2 Qxg7 7.b5 Qe7 8.Qc2 h5 9.Qg6+ Kd8 10.Qg8+ Qe8 11.Qg5+ Qe7 12.Qxh5 Qc7+ 13.Ka8 Qc8+ 14.Ka7 Qc7+ 15.Ka6 Qc8+ 16.Kxb6 Qc7+ 17.Ka6 Qc8+ 18.Ka5 Qc3+ 19.Ka6 
  = (0.00)  Depth: 45/37   00:00:18  698MN
1.Kb7 f5 2.Qh6 e6 3.Qf6 f4 4.Kxb8 f3 5.b4 f2 6.Qxf2 Qxg7 7.b5 Qe7 8.Qc2 h5 9.Qg6+ Kd8 10.Qg8+ Qe8 11.Qg5+ Qe7 12.Qxh5 Qc7+ 13.Ka8 Qc8+ 14.Ka7 Qc7+ 15.Ka6 Qc8+ 16.Kxb6 Qc7+ 17.Ka6 Qc8+ 18.Ka5 Qc3+ 19.Ka6 
  = (0.00)  Depth: 46/37   00:00:20  754MN
1.Kb7 f5 2.Qh6 e6 3.Qf6 f4 4.Kxb8 f3 5.b4 f2 6.Qxf2 Qxg7 7.b5 Qe7 8.Qc2 h5 9.Qg6+ Kd8 10.Qg8+ Qe8 11.Qg5+ Qe7 12.Qxh5 Kd7 13.Qh3 Qd8+ 14.Kb7 Qc8+ 15.Ka7 Qc7+ 16.Ka6 Qc8+ 17.Kxb6 Qb8+ 18.Ka6 Qa8+ 19.Kb6 
  = (0.00)  Depth: 47/38   00:00:27  1046MN
1.Kb7 f5 2.Qh6 e6 3.Qf6 f4 4.Kxb8 f3 5.b4 f2 6.Qxf2 Qxg7 7.b5 Qe7 8.Qc2 h5 9.Qg6+ Kd8 10.Qg8+ Qe8 11.Qg5+ Qe7 12.Qxh5 Qc7+ 13.Ka8 Qc8+ 14.Ka7 Qc7+ 
  = (0.00)  Depth: 48/37   00:00:32  1222MN
1.Qh6 
  = (0.09 ++)  Depth: 49/66   00:00:59  2262MN
1.Qh6 
  = (0.19 ++)  Depth: 49/66   00:01:01  2335MN
1.Qh6 
  +/= (0.33 ++)  Depth: 49/67   00:01:03  2394MN
1.Qh6 
  +/= (0.53 ++)  Depth: 49/69   00:01:04  2443MN
1.Qh6 
  +/- (0.79 ++)  Depth: 49/69   00:01:06  2515MN
1.Qh6 
  +/- (1.15 ++)  Depth: 49/69   00:01:07  2572MN
1.Qh6 
  +- (1.62 ++)  Depth: 49/69   00:01:09  2632MN
1.Qh6 
  +- (2.23 ++)  Depth: 49/69   00:01:11  2717MN
1.Qh6 
  +- (3.01 ++)  Depth: 49/69   00:01:13  2799MN
1.Qh6 
  +- (4.01 ++)  Depth: 49/69   00:01:16  2906MN
1.Qh6 
  +- (5.29 ++)  Depth: 49/73   00:01:18  2986MN
1.Qh6 
  +- (6.90 ++)  Depth: 49/154   00:01:21  3114MN
1.Qh6 Kd8 2.Qg5 Ke8 3.Qf5 e6 4.Qf6 h5 5.Qh6 f5 6.Qxh5+ Ke7 7.Qh4+ Ke8 8.Qh6 f4 9.Qg6+ Ke7 10.Qf6+ Ke8 11.Kb7 Ba7 12.Kxa7 Qf7+ 13.Kb8 Qxf6 14.g8Q+ Qf8 15.Qxe6+ Qe7 16.Qg8+ Qf8 17.Qxd5 Qf5 18.Qc6+ Kf7 19.Qc7+ Kg6 20.Qd6+ Kg7 21.e6 Qf8+ 22.Kc7 Qxd6+ 23.Kxd6 f3 24.d5 f2 25.e7 f1Q 26.e8Q Qa6 27.Kc7 Qa7+ 28.Kc6 Qa6 29.Qe7+ Kg6 30.Qe6+ Kg5 31.d6 b5+ 32.Kc5 b4 33.Qe5+ Kg4 34.d7 Qa5+ 35.Kd6 Qd8 36.Qe7 Qb6+ 37.Kd5 Qb7+ 38.Ke6 Qe4+ 39.Kd6 
  +- (8.08)  Depth: 49/154   00:01:46  4185MN
I guess some people might be interested in looking at "Honey" when I get around to releasing it. New SF derivative based on SF, Sugar 1.6.1 and McCain with a little bit of corchess thrown in as well. The run below was exceptionally fast . Out of 10 runs using 23 threads using 12 cores (8192M hash), twice it took over 10 seconds , with 14 seconds being the longest, twice it was under 1 second , similar to below and the other 6 runs were about 3 to 4 seconds. Single core/thread (256M hash ) with avg of 1.76M nps, it took 2:41 and 283M searched nodes.

Code: Select all

dep	score	nodes	time	(not shown:  tbhits	knps	seldep)
 38	+13.06 	3.96G	1:59.92	Qh6 Kd8 Qh3 e6 Qh4+ Ke8 Qf6 b5 b4 h5 Qh6 f5 Qxh5+ Ke7 Qg5+ Ke8 Qg6+ Kd8 Qf6+ Ke8 Kb7 f4 Kxb8 f3 Qxf3 Qxg7 Qe2 Kf8 Qf1+ Ke7 Qxb5 Qh8+ Kc7 Qd8+ Kb7 Kf7 Qc6 Qg8 b5 Qg4 Qc5 Qg3 b6 Kg6 Kc6 Qb3 b7 Kg5 Qe7+ Kg4 Qg7+ Kf3 Qf8+ Ke4 b8=Q 
 38	+11.99!	3.31G	1:40.89	Qh6! 
 38	+10.88!	2.89G	1:28.54	Qh6! 
 38	+9.63!	2.63G	1:20.82	Qh6! 
 38	+9.26?	2.20G	1:08.14	Qh6 Kd8? 
 37	+9.31 	2.08G	1:04.54	Qh6 Kd8 Qh3 e6 Qh4+ Ke8 Qf6 b5 b4 h5 Qh6 f5 Qxh5+ Ke7 Qg5+ Ke8 Qg6+ Kd8 Qf6+ Ke8 Kb7 f4 Kxb8 f3 Qxf3 Qxg7 Qe2 Kf7 Qf1+ Ke7 Qxb5 Qf8+ Kc7 Qd8+ Kb7 Kf7 Qc6 Qh4 Qd7+ Kf8 b5 Qg4 Qd6+ Kg7 Qc5 Kh6 b6 Qh5 Kc6 Qe8+ Kd6 Qf8+ Kxe6 Qg8+ Kd 
 37	+8.59!	1.77G	0:54.66	Qh6! 
 37	+8.26?	1.62G	0:50.05	Qh6 Kd8? 
 36	+8.31 	1.40G	0:43.66	Qh6 Kd8 Qh3 e6 Qh4+ Ke8 Qf6 b5 b4 h5 Qh6 f5 Qxh5+ Ke7 Qg5+ Ke8 Qg6+ Kd8 Qf6+ Ke8 Kb7 f4 Kxb8 f3 Qxf3 Qxg7 Qe2 Qh8 Qxb5+ Kf7+ Kc7 Kg6 Qd3+ Kg7 Qg3+ Kf7 Qf2+ Kg8 Qg2+ Kf8 Qg6 Qh3 Qf6+ Kg8 b5 Qc3+ Kb7 Qh3 b6 Kh7 Qe7+ Kg6 Kc7 Qc3+ Q 
 35	+8.00 	1.04G	0:32.70	Qh6 Kd8 Qh3 e6 Qh4+ Ke8 Qf6 h5 Qh6 f5 Qxh5+ Ke7 Qg5+ Ke8 Qg6+ Kd8 Qf6+ Ke8 Kb7 f4 Kxb8 f3 Qxf3 Qxg7 Qc3 Qg4 Kc7 Ke7 Kxb6 Kf7 b4 Kg6 b5 Qg5 Ka6 Qd8 b6 Qa8+ Kb5 Kf5 Qc7 Qe8+ Qc6 Qf8 Qc2+ Kg4 b7 Qe8+ Kb6 Qf8 Qg6+ Kh3 Kc6 Kh4 Qxe6 Q 
 35	+7.98!	899.0M	0:28.52	Qh6! 
 34	+7.43 	760.8M	0:24.32	Qh6 Kd8 Qh3 e6 Qh4+ Ke8 Qf6 h5 Qh6 f5 Qxh5+ Ke7 Qg5+ Ke8 Qg6+ Kd8 Qf6+ Ke8 Kb7 f4 Kxb8 f3 Qxf3 Qxg7 Qc3 Qg4 Kc7 Kf7 Kd6 Qg5 Qc7+ Kg6 Qe7 Qf4 Qxe6+ Kh5 Qxd5 Kh4 Kc6 Qf8 Qd7 Qa8+ Kxb6 Qb8+ Qb7 Qf8 e6 Qf6 Qh7+ Kg3 Qc7+ Kg4 Qd7 Kg5 
 33	+7.35 	633.2M	0:20.40	Qh6 Kd8 Qh3 e6 Qh4+ Ke8 Qf6 h5 Qh6 f5 Qxh5+ Ke7 Qg5+ Ke8 Qg6+ Kd8 Qf6+ Ke8 Kb7 f4 Kxb8 f3 Qxf3 Qxg7 Qc3 Qg4 Kc7 Ke7 Kxb6 Kf7 b4 Kg6 b5 Qf5 Kc6 Qf8 Qd3+ Kh6 Qh3+ Kg5 Qxe6 Qa8+ Kc5 Kf4 Qxd5 Qa3+ Kb6 Ke3 Qd6 Qd3 
 33	+6.83!	550.5M	0:17.88	Qh6! 
 33	+6.05?	543.9M	0:17.69	Qh6 b5? 
 33	+7.02!	492.8M	0:16.18	Qh6! 
 33	+6.56!	426.4M	0:14.13	Qh6! 
 32	+6.10 	327.4M	0:10.78	Qh6 Kd8 Qh3 e6 Qh4+ Ke8 Qf6 b5 b4 h6 Qxh6 f5 Qg6+ Kd8 Qf6+ Ke8 Kb7 f4 Kxb8 f3 Qxf3 Qxg7 Qe2 Qf8 Qxb5+ Kf7+ Kc7 Kg6 Qd3+ Kg5 Qg3+ Kh5 Qh3+ Kg5 Qxe6 Qa8 b5 Qa7+ Kc6 Qa8+ Kc5 Qa3+ Kb6 Qa8 Qc6 Qb8+ Kc5 Kf4 e6 Ke4 Qxd5+ Kd3 e7 Qc8+  
 31	+5.69 	284.0M	0:09.44	Qh6 Kd8 Qh3 e6 Qh4+ Ke8 Qf6 h5 Qh6 f5 Qxh5+ Ke7 Qg5+ Ke8 Qg6+ Kd8 Qf6+ Ke8 Kb7 f4 Kxb8 f3 Qxf3 Qxg7 Qc3 Qg4 Kc7 Ke7 Kxb6 Kf7 b4 Kg6 b5 Qf5 Kc6 Qf8 Qg3+ Kh7 Qh3+ Kg7 Qg4+ Kh7 Qxe6 Qa8+ Kc5 Qa5 Qf7+ Kh6 Qf6+ Kh5 Kxd5 Qc7 
 31	+5.43!	257.8M	0:08.63	Qh6! 
 31	+4.75?	252.0M	0:08.44	Qh6 b5? 
 31	+5.49!	241.3M	0:08.10	Qh6! 
 31	+5.01!	193.4M	0:06.57	Qh6! 
 31	+4.80?	190.3M	0:06.47	Qh6 e6? 
 30	+4.85 	171.5M	0:05.86	Qh6 Kd8 Qh3 e6 Qh4+ Ke8 Qf6 b5 b4 h5 Qh6 f5 Qxh5+ Ke7 Qg5+ Ke8 Qg6+ Kd8 Qf6+ Ke8 Kb7 f4 Kxb8 f3 Qxf3 Qxg7 Qe2 Kd8 Qc2 Qg1 Qc8+ Ke7 Qb7+ Kd8 Qb6+ Ke7 Qd6+ Kf7 Qd7+ Kf8 Qxb5 Qh2 Qc5+ Kg7 Kc7 Kg6 b5 Qh7+ Kd6 Qb7 b6 Kf5 Qc2+ Kf4 Qc 
 30	+4.66!	159.1M	0:05.44	Qh6! 
 29	+4.32 	131.3M	0:04.53	Qh6 Kd8 Qh3 e6 Qh4+ Ke8 Qf6 h5 Qh6 f5 Qxh5+ Ke7 Qg5+ Kf7 Qf6+ Ke8 Kb7 f4 Kxb8 f3 Qxf3 Qxg7 Qc3 Qg4 Kc7 Kf7 Kd6 Qh4 Qc7+ Kg6 Qd7 Kf5 Qxe6+ Ke4 Qxd5+ Kd3 Kc6 Qh8 Qd6 Qh1+ Kxb6 Qh2 Qd7 Qh6+ e6 
 29	+4.10!	122.0M	0:04.23	Qh6! 
 29	+3.81!	112.8M	0:03.93	Qh6! 
 28	+3.53 	98.7M  	0:03.46	Qh6 e6 Qf6 h6 Qxh6 f5 Qg6+ Kd8 Qf6+ Ke8 Kb7 f4 Kxb8 f3 Qxf3 Qxg7 Qc3 Qg4 Kc7 Ke7 Kxb6 Kf7 b4 Qe2 Qc5 Kg6 b5 Kf5 Kc7 Qh5 b6 Qf7+ Kd6 Qb7 Qc2+ Kg5 
 28	+3.46!	91.7M  	0:03.22	Qh6! 
 28	+3.22!	85.4M  	0:03.00	Qh6! 
 27	+2.97 	73.8M  	0:02.61	Qh6 Kd8 Qh3 e6 Qh4+ Ke8 Qf6 h5 Qh6 f5 Qxh5+ Ke7 Qg5+ Ke8 Qg6+ Kd8 Qf6+ Ke8 Kb7 f4 Kxb8 f3 Qxf3 Qxg7 Qc3 Qh6 Qc6+ Kf8 Kc7 Qh7+ Kxb6 Qb1 Qd6+ Kf7 Qd7+ Kf8 Qd8+ Kg7 Qe7+ Kh8 b4 Qe4 Qc5 Kh7 
 26	+2.50 	60.3M  	0:02.15	Qh6 b5 b4 Kd8 Qh3 e6 Qh4+ Ke8 Qf6 h6 Qxh6 f5 Qg6+ Kd8 Qf6+ Ke8 Kb7 f4 Kxb8 f3 Qxf3 Qxg7 Qe2 Kd8 Qc2 Qg4 Qc5 Qg7 Qc8+ Ke7 Qb7+ Kf8 Qxb5 Qe7 Qc5 
 25	+1.68 	39.0M  	0:01.42	Qh6 b5 b4 Kd8 Qh3 e6 Qh4+ Ke8 Qf6 h5 Qh6 f5 Qxh5+ Ke7 Qg5+ Ke8 Qg6+ Ke7 Qf6+ Ke8 Kb7 f4 Kxb8 f3 Qxf3 Qxg7 Qc3 Qg1 Qc5 Kf7 Qxb5 Kg6 Qc5 Kf5 b5 Ke4 b6 
 24	+0.89 	28.1M  	0:01.04	Qh6 Kd8 Qg5 b5 Kb7 Ke8 Kxb8 Kd7+ Ka7 Ke6 Kb6 f6 Qg4+ f5 Qg5 Kf7 Qxf5+ Kxg7 Qd7 Qf7 e6 Qf8 Kxb5 Kf6 b4 Qb8+ Ka4 Qg3 Qxd5 
 23	+0.43 	22.3M  	0:00.83	Qh6 b5 Kb7 e6 Kxb8 Kd7+ Ka7 b4 Qg5 h6 Qg1 h5 Ka6 h4 Ka5 h3 Qg5 h2 Qh6 h1=Q Qxh1 Qxg7 Qf1 Ke7 
 22	  0.00 	14.5M  	0:00.56	Qh6 f6 Qh5+ Kd8 Qf5 Ke8 Qh5+ 
 21	  0.00 	10.2M  	0:00.40	Kb7 f6 Qc6+ Kf7 Qxd5+ Kxg7 exf6+ Kh8 Qxg8+ Kxg8 fxe7 Kf7 Kxb8 Kxe7 
 20	  0.00 	4.80M  	0:00.19	Kb7 f6 Qc6+ Kf7 Qxd5+ Kxg7 exf6+ Kh8 Qxg8+ Kxg8 fxe7 Kf7 Kxb8 Kxe7 
 19	  0.00 	3.99M  	0:00.15	Kb7 f6 Qc6+ Kf7 Qxd5+ e6 Qd7+ Kg6 d5 exd5 e6 Bg3 e7 Qb8+ Kc6 Qa8+ Kxb6 Bf2+ Kb5 Qb8+ Ka4 Qa8+ 
 18	  0.00 	3.34M  	0:00.13	Kb7 f6 Qc6+ Kf7 Qxd5+ Kxg7 exf6+ Kh8 Qxg8+ Kxg8 fxe7 Kf7 Kxb8 Kxe7 
 17	  0.00 	2.72M  	0:00.10	Kb7 f6 Qc6+ Kf7 Qxd5+ Kxg7 exf6+ Kh8 Qxg8+ Kxg8 fxe7 Kf7 Kxb8 Kxe7 
 16	  0.00 	2.51M  	0:00.10	Kb7 f6 Qc6+ Kf7 Qxd5+ Kxg7 exf6+ Kh8 Qxg8+ Kxg8 fxe7 Kf7 Kxb8 Kxe7 
 15	  0.00 	2.50M  	0:00.09	Kb7 f6 Qc6+ Kf7 Qxd5+ e6 Qd7+ Kg6 d5 exd5 Qg4+ Kf7 Qd7+ 
 14	  0.00 	2.18M  	0:00.08	Kb7 f6 Qc6+ Kf7 Qxd5+ Kxg7 exf6+ exf6 Qxg8+ Kxg8 Kxb8 h5 d5 
 13	 -0.84 	1.73M  	0:00.07	Kb7 f5 Qc8+ Kf7 Qxf5+ Kxg7 Qg5+ Kf8 Qf4+ Ke8 Kxb8 Qg6 Kb7 b5 
 12	 -1.15 	1.03M  	0:00.04	Kb7 f6 Kxb8 Kf7+ Kb7 fxe5 dxe5 Qxg7 Qf1+ Kg8 e6 Qg6 Qe1 d4 Qh4 
 11	 -1.01 	621409	0:00.03	Kb7 f6 Kxb8 Kf7+ Kb7 Qxg7 exf6 Qxf6 Qh1 Qf5 Kxb6 h5 Kc5 Kf6 Qh2 Ke6 
 10	 -1.01 	252248	0:00.01	Kb7 f5 Kxb8 Kf7+ Kc7 e6 b4 b5 Qc6 Kxg7 Qxb5 
  9	 -1.03 	109699	0:00.01	Kb7 f6 Kxb8 Kf7+ Kb7 fxe5 dxe5 Qxg7 e6+ Kf6 Qc6 Qg2 
  8	 -1.01 	67530  	0:00.00	Kb7 f6 Kxb8 Kf7+ Kb7 fxe5 dxe5 
  7	 -1.08 	51364  	0:00.00	Kb7 f6 Kxb8 Kf7+ Kb7 fxe5 
  6	 -1.28 	25543  	0:00.00	Kb7 f6 Kxb8 Kf7+ Kc7 fxe5 Qf1+ Kxg7 
  5	 -0.93 	14346  	0:00.00	Kb7 
  4	 -1.58 	9493    	0:00.00	Qg5 Ba7 Qg2 e6 
  3	 -1.51 	5577    	0:00.00	Kb5 f6 exf6 
  2	 -1.41 	1607    	0:00.00	Qg5 e6 
  1	 -1.70 	1214    	0:00.00	Qg5 
  1	Found 1511 tablebases 
Here is another run with Stockfish where it took 5 seconds, I'm sure if I ran it 10 times that it would find the move sooner on some runs and longer on others.

Code: Select all

New game
1b2k1q1/4ppPp/1pK5/3pP3/3P4/1P6/8/2Q5 w - - 0 1

Analysis by Stockfish 170519 64 BMI2:

1.Kb7 f6 2.Kxb8 fxe5 3.Qc6+ Kf7+ 4.Kc7 e6 5.Kxb6 Qd8+ 6.Kb5 Qe7 7.dxe5 Kxg7 8.b4 h5 9.Qc3 Qb7+ 10.Kc5 Qc7+ 11.Kd4 Qb6+ 12.Kd3 
  -/+ (-1.24)  Depth: 13/34   00:00:00  1101kN
1.Kb7 f6 2.Kxb8 fxe5 3.Qc6+ Kf7+ 4.Kc7 e6 5.Kxb6 Qd8+ 6.Ka6 Kxg7 7.dxe5 Kf7 8.b4 h5 
  -/+ (-1.07)  Depth: 14/34   00:00:00  1269kN
1.Kb7 f6 2.Qc6+ Kf7 3.Qxd5+ e6 4.Qd7+ Kg6 5.d5 exd5 6.Qg4+ Kf7 7.Qd7+ 
  = (0.00)  Depth: 15/40   00:00:00  2811kN
1.Kb7 f6 2.Qc6+ Kf7 3.Qxd5+ e6 4.Qd7+ Kg6 5.d5 exd5 6.Qg4+ Kf7 7.Qd7+ 
  = (0.00)  Depth: 16/14   00:00:00  2926kN
1.Kb7 f5 2.e6 Qxe6 3.Qg5 Qd7+ 4.Kxb8 Qd8+ 5.Kb7 Kf7 6.Qxf5+ Kxg7 7.Qg5+ Kf8 8.Qf5+ 
  = (0.00)  Depth: 17/18   00:00:00  3883kN
1.Kb7 f5 2.e6 Qxe6 3.Qg5 Qd7+ 4.Kxb8 Qd8+ 5.Kb7 Kf7 6.Qxf5+ Kxg7 7.Qg5+ Kf8 8.Qf5+ 
  = (0.00)  Depth: 18/18   00:00:00  3896kN
1.Kb7 f5 2.e6 Qxe6 3.Qg5 Qd7+ 4.Kxb8 Qd8+ 5.Kb7 Kf7 6.Qxf5+ Kxg7 7.Qg5+ Kf8 8.Qf5+ Kg8 9.Qg5+ 
  = (0.00)  Depth: 19/18   00:00:00  4177kN
1.Kb7 f5 2.e6 Qxe6 3.Qg5 Qd7+ 4.Kxb8 Qd8+ 5.Kb7 Kf7 6.Qxf5+ Kxg7 7.Qg5+ Kf8 8.Qf5+ Kg8 9.Qg5+ 
  = (0.00)  Depth: 20/18   00:00:00  4240kN
1.Kb7 f5 2.e6 Qxe6 3.Qg5 Qd7+ 4.Kxb8 Qd8+ 5.Kb7 Kf7 6.Qxf5+ Kxg7 7.Qg5+ Kf8 8.Qf5+ Kg8 9.Qg5+ 
  = (0.00)  Depth: 21/18   00:00:00  4561kN
1.Kb7 f5 2.e6 Qxe6 3.Qg5 Qd7+ 4.Kxb8 Qd8+ 5.Kb7 Kf7 6.Qxf5+ Kxg7 7.Qg5+ Kf8 8.Qf5+ Kg7 
  = (0.00)  Depth: 22/41   00:00:00  6423kN
1.Kb7 f5 2.e6 Qxe6 3.Qg5 Qd7+ 4.Kxb8 Qd8+ 5.Kb7 Kf7 6.Qxf5+ Kxg7 7.Qg5+ Kf8 8.Qf5+ Ke8 9.Qxh7 Qd7+ 10.Kxb6 Qd6+ 11.Kb5 Qb8+ 12.Kc6 Qa8+ 13.Kb5 Qb7+ 14.Kc5 Qa7+ 15.Kc6 
  = (0.00)  Depth: 23/41   00:00:00  6623kN
1.Kb7 f5 2.e6 Qxe6 3.Qg5 Qd7+ 4.Kxb8 Qd8+ 5.Kb7 Kf7 6.Qxf5+ Kxg7 7.Qg5+ Kf8 8.Qf5+ Ke8 9.Qxh7 Qd7+ 10.Kxb6 Qd6+ 11.Kb5 Qb8+ 12.Kc6 Qa8+ 13.Kb5 Qb7+ 14.Kc5 Qa7+ 15.Kc6 
  = (0.00)  Depth: 24/42   00:00:00  7030kN
1.Kb7 f5 2.e6 Qxe6 3.Qg5 Qd7+ 4.Kxb8 Qd8+ 5.Kb7 Kf7 6.Qxf5+ Kxg7 7.Qg5+ Kf8 8.Qf5+ Ke8 9.Qxh7 Qd7+ 10.Kxb6 Qd6+ 11.Kb5 Qb8+ 12.Kc6 Qa8+ 13.Kb5 Qb7+ 14.Kc5 Qa7+ 15.Kc6 
  = (0.00)  Depth: 25/42   00:00:00  8657kN
1.Kb7 f5 2.e6 Qxe6 3.Qg5 Qd7+ 4.Kxb8 Qd8+ 5.Kb7 Kf7 6.Qxf5+ Kxg7 7.Qg5+ Kf8 8.Qf5+ Ke8 9.Qxh7 Qd7+ 10.Kxb6 Qd6+ 11.Kb5 Qb8+ 12.Kc6 Qa8+ 13.Kb5 Qb7+ 14.Kc5 Qa7+ 15.Kc6 
  = (0.00)  Depth: 26/42   00:00:00  10627kN
1.Kb7 f5 2.e6 Qxe6 3.Qg5 Qd7+ 4.Kxb8 Qd8+ 5.Kb7 Kf7 6.g8Q+ Qxg8 7.Qxf5+ Kg7 8.Qe5+ Kf8 9.Kxb6 Qg6+ 10.Ka5 Ke8 11.Qxd5 Qd6 12.Qc5 Kd7 13.b4 h5 14.Qxh5 Qc7+ 15.Ka4 Qc2+ 16.Ka5 
  = (0.00)  Depth: 27/59   00:00:01  30125kN
1.Kb7 f5 2.e6 Qxe6 3.Qg5 Qd7+ 4.Kxb8 Qd8+ 5.Kb7 Kf7 6.g8Q+ Qxg8 7.Qxf5+ Kg7 8.Qe5+ Kf8 9.Qb8+ Kg7 10.Qe5+ 
  = (0.00)  Depth: 28/59   00:00:01  36563kN
1.Kb7 f5 2.Qh6 e6 3.Qf6 f4 4.Kxb8 f3 5.Kb7 Qf7+ 6.Kc6 Qxf6 7.g8Q+ Qf8 8.Qxe6+ Qe7 9.Qg8+ Qf8 10.Qg4 Qf7 11.Qc8+ Ke7 12.Qd7+ Kf8 13.e6 Qf6 14.Qc8+ Kg7 15.Qc7+ Kf8 
  = (0.00)  Depth: 29/59   00:00:01  37027kN
1.Kb7 f5 2.Qh6 e6 3.Qf6 f4 4.Kxb8 f3 5.Kb7 Qf7+ 6.Kc6 Qxf6 7.g8Q+ Qf8 8.Qxe6+ Qe7 9.Qg8+ Qf8 10.Qg4 Qf7 11.Qc8+ Ke7 12.Qd7+ Kf8 13.e6 Qf6 14.Qc8+ Kg7 15.Qc7+ Kf8 16.Qb8+ Kg7 17.Qg3+ Kf8 
  = (0.00)  Depth: 30/59   00:00:01  43327kN
1.Kb7 f5 2.Qh6 e6 3.Qf6 f4 4.Kxb8 f3 5.Kb7 Qf7+ 6.Kc6 Qxf6 7.g8Q+ Qf8 8.Qxe6+ Qe7 9.Qg8+ Qf8 10.Qg4 Qf7 11.Qc8+ Ke7 12.Qd7+ Kf8 13.e6 Qf6 14.Qc8+ Kg7 15.Qc7+ Kf8 16.Qb8+ Kg7 17.Qg3+ Kf8 
  = (0.00)  Depth: 31/59   00:00:01  54262kN
1.Kb7 f5 2.Qh6 e6 3.Qf6 f4 4.Kxb8 f3 5.Kb7 Qf7+ 6.Kc6 Qxf6 7.g8Q+ Qf8 8.Qxe6+ Qe7 9.Qg8+ Qf8 10.Qg4 Qf7 11.Qc8+ Ke7 12.Qd7+ Kf8 13.e6 Qf6 14.Qc8+ Kg7 15.Qc7+ Kf8 16.Qb8+ Kg7 17.Qg3+ Kf8 
  = (0.00)  Depth: 32/59   00:00:02  60859kN
1.Kb7 f5 2.Qh6 e6 3.Qf6 f4 4.Kxb8 f3 5.Kb7 Qf7+ 6.Kc6 Qxf6 7.g8Q+ Qf8 8.Qxe6+ Qe7 9.Qg8+ Qf8 10.Qg4 Qf7 11.Qc8+ Ke7 12.Qd7+ Kf8 13.e6 Qf6 14.Qc8+ Kg7 15.Qc7+ Kf8 16.Qb8+ Kg7 17.Qg3+ Kf8 
  = (0.00)  Depth: 33/59   00:00:02  63738kN
1.Kb7 f5 2.Qh6 e6 3.Qf6 f4 4.Kxb8 f3 5.Kb7 Qf7+ 6.Kc6 Qxf6 7.g8Q+ Qf8 8.Qxe6+ Qe7 9.Qg8+ Qf8 10.Qg4 Qf7 11.Qc8+ Ke7 12.Qd7+ Kf8 13.e6 Qf6 14.Qc8+ Kg7 15.Qc7+ Kf8 16.Qb8+ Kg7 17.Qg3+ Kf8 
  = (0.00)  Depth: 34/59   00:00:02  85173kN
1.Kb7 f5 2.Qh6 e6 3.Qf6 f4 4.Kxb8 f3 5.Kb7 Qf7+ 6.Kc6 Qxf6 7.g8Q+ Qf8 8.Qxe6+ Qe7 9.Qg8+ Qf8 10.Qg4 Qf7 11.Qc8+ Ke7 12.Qd7+ Kf8 13.e6 Qf6 14.Qc8+ Kg7 15.Qc7+ Kf8 16.Qb8+ Kg7 17.Qg3+ Kf8 
  = (0.00)  Depth: 35/33   00:00:03  98451kN
1.Qh6 
  = (0.09 ++)  Depth: 36/43   00:00:05  173MN
1.Qh6 
  = (0.19 ++)  Depth: 36/47   00:00:05  178MN
1.Qh6 
  +/= (0.33 ++)  Depth: 36/47   00:00:05  181MN
1.Qh6 
  +/= (0.53 ++)  Depth: 36/47   00:00:05  199MN
1.Qh6 
  +/- (0.79 ++)  Depth: 36/47   00:00:05  207MN
1.Qh6 
  +/- (1.15 ++)  Depth: 36/47   00:00:06  218MN
1.Qh6 Kd8 2.Qg5 Ke8 3.Qf5 e6 4.Qf6 b5 5.b4 h5 6.Qh6 f5 7.Qxh5+ Ke7 8.Qg5+ Ke8 9.Qg6+ Ke7 10.Qf6+ Ke8 11.Kb7 f4 12.Kxb8 f3 13.Kc7 Qf7+ 14.Kc6 Qxf6 15.g8Q+ Qf8 16.Qxe6+ Qe7 17.Qg8+ Qf8 18.Qxd5 Qxb4 19.Qd7+ Kf8 20.Qd8+ Kf7 21.Qf6+ Ke8 22.e6 Qe7 23.Qh8+ Qf8 24.Qh5+ Ke7 25.Qc5+ Ke8 26.Qxb5 
  +/- (1.58)  Depth: 36/52   00:00:06  226MN
1.Qh6 Kd8 2.Qg5 Ke8 3.Qf5 e6 4.Qf6 b5 5.b4 h5 6.Qh6 f5 7.Qxh5+ Ke7 8.Qg5+ Ke8 9.Qg6+ Ke7 10.Qf6+ Ke8 11.Kb7 f4 12.Kxb8 f3 13.Kc7 Qf7+ 14.Kc6 Qxf6 15.g8Q+ Qf8 16.Qxe6+ Qe7 17.Qg8+ Qf8 18.Qxd5 Qxb4 19.Qd7+ Kf8 20.Qd8+ Kf7 21.Qf6+ Ke8 22.e6 Qe7 23.Qh8+ Qf8 24.Qh5+ Ke7 25.Qc5+ Ke8 26.Qxb5 
  +- (1.67 ++)  Depth: 37/40   00:00:07  267MN
1.Qh6 Kd8 2.Qg5 Ke8 3.Qf5 e6 4.Qf6 b5 5.b4 h5 6.Qh6 f5 7.Qxh5+ Ke7 8.Qg5+ Ke8 9.Qg6+ Ke7 10.Qf6+ Ke8 11.Kb7 f4 12.Kxb8 f3 13.Kc7 Qf7+ 14.Kc6 Qxf6 15.g8Q+ Qf8 16.Qxe6+ Qe7 17.Qg8+ Qf8 18.Qxd5 Qxb4 19.Qd7+ Kf8 20.Qd8+ Kf7 21.Qf6+ Ke8 22.e6 Qe7 23.Qh8+ Qf8 24.Qh5+ Ke7 25.Qc5+ Ke8 26.Qxb5 
  +- (1.76 ++)  Depth: 37/56   00:00:07  280MN
1.Qh6 Kd8 2.Qg5 Ke8 3.Qf5 e6 4.Qf6 b5 5.b4 h5 6.Qh6 f5 7.Qxh5+ Ke7 8.Qg5+ Ke8 9.Qg6+ Ke7 10.Qf6+ Ke8 11.Kb7 f4 12.Kxb8 f3 13.Kc7 Qf7+ 14.Kc6 Qxf6 15.g8Q+ Qf8 16.Qxe6+ Qe7 17.Qg8+ Qf8 18.Qxd5 Qxb4 19.Qd7+ Kf8 20.Qd8+ Kf7 21.Qf6+ Ke8 22.e6 Qe7 23.Qh8+ Qf8 24.Qh5+ Ke7 25.Qc5+ Ke8 26.Qxb5 
  +- (1.91 ++)  Depth: 37/56   00:00:07  283MN
1.Qh6 Kd8 2.Qg5 Ke8 3.Qf5 e6 4.Qf6 b5 5.b4 h5 6.Qh6 f5 7.Qxh5+ Ke7 8.Qg5+ Ke8 9.Qg6+ Ke7 10.Qf6+ Ke8 11.Kb7 f4 12.Kxb8 f3 13.Kc7 Qf7+ 14.Kc6 Qxf6 15.g8Q+ Qf8 16.Qxe6+ Qe7 17.Qg8+ Qf8 18.Qxd5 Qxb4 19.Qd7+ Kf8 20.Qd8+ Kf7 21.Qf6+ Ke8 22.e6 Qe7 23.Qh8+ Qf8 24.Qh5+ Ke7 25.Qc5+ Ke8 26.Qxb5 
  +- (2.10 ++)  Depth: 37/56   00:00:08  288MN
1.Qh6 Kd8 2.Qg5 Ke8 3.Qf5 e6 4.Qf6 b5 5.b4 h5 6.Qh6 f5 7.Qxh5+ Ke7 8.Qg5+ Ke8 9.Qg6+ Ke7 10.Qf6+ Ke8 11.Kb7 f4 12.Kxb8 f3 13.Kc7 Qf7+ 14.Kc6 Qxf6 15.g8Q+ Qf8 16.Qxe6+ Qe7 17.Qg8+ Qf8 18.Qxd5 Qxb4 19.Qd7+ Kf8 20.Qd8+ Kf7 21.Qf6+ Ke8 22.e6 Qe7 23.Qh8+ Qf8 24.Qh5+ Ke7 25.Qc5+ Ke8 26.Qxb5 
  +- (2.37 ++)  Depth: 37/56   00:00:08  292MN
1.Qh6 Kd8 2.Qg5 Ke8 3.Qf5 e6 4.Qf6 b5 5.b4 h5 6.Qh6 f5 7.Qxh5+ Ke7 8.Qg5+ Ke8 9.Qg6+ Ke7 10.Qf6+ Ke8 11.Kb7 f4 12.Kxb8 f3 13.Kc7 Qf7+ 14.Kc6 Qxf6 15.g8Q+ Qf8 16.Qxe6+ Qe7 17.Qg8+ Qf8 18.Qxd5 Qxb4 19.Qd7+ Kf8 20.Qd8+ Kf7 21.Qf6+ Ke8 22.e6 Qe7 23.Qh8+ Qf8 24.Qh5+ Ke7 25.Qc5+ Ke8 26.Qxb5 
  +- (2.73 ++)  Depth: 37/56   00:00:08  304MN
1.Qh6 Kd8 2.Qg5 Ke8 3.Qf5 e6 4.Qf6 b5 5.b4 h5 6.Qh6 f5 7.Qxh5+ Ke7 8.Qg5+ Ke8 9.Qg6+ Ke7 10.Qf6+ Ke8 11.Kb7 f4 12.Kxb8 f3 13.Kc7 Qf7+ 14.Kc6 Qxf6 15.g8Q+ Qf8 16.Qxe6+ Qe7 17.Qg8+ Qf8 18.Qxd5 Qxb4 19.Qd7+ Kf8 20.Qd8+ Kf7 21.Qf6+ Ke8 22.e6 Qe7 23.Qh8+ Qf8 24.Qh5+ Ke7 25.Qc5+ Ke8 26.Qxb5 
  +- (3.20 ++)  Depth: 37/56   00:00:08  311MN
1.Qh6 Kd8 2.Qg5 Ke8 3.Qf5 e6 4.Qf6 b5 5.b4 h5 6.Qh6 f5 7.Qxh5+ Ke7 8.Qg5+ Ke8 9.Qg6+ Ke7 10.Qf6+ Ke8 11.Kb7 f4 12.Kxb8 f3 13.Kc7 Qf7+ 14.Kc6 Qxf6 15.g8Q+ Qf8 16.Qxe6+ Qe7 17.Qg8+ Qf8 18.Qxd5 Qxb4 19.Qd7+ Kf8 20.Qd8+ Kf7 21.Qf6+ Ke8 22.e6 Qe7 23.Qh8+ Qf8 24.Qh5+ Ke7 25.Qc5+ Ke8 26.Qxb5 
  +- (3.81 ++)  Depth: 37/56   00:00:08  320MN
1.Qh6 Kd8 2.Qh3 e6 3.Qh4+ Ke8 4.Qf6 h5 5.Qh6 f5 6.Qxh5+ Ke7 7.Qg5+ Kf7 8.Qf6+ Ke8 9.Kb7 f4 10.Kxb8 f3 11.Qxf3 Qxg7 12.Qc3 Qg1 13.Kc7 Kf7 14.Kxb6 Kg6 15.b4 Qf1 16.Qc5 Qf7 17.b5 Kf5 18.Ka6 Qg8 19.b6 Qa8+ 20.Kb5 Ke4 21.Qc7 Qe8+ 22.Qc6 
  +- (4.11)  Depth: 37/56   00:00:09  337MN
1.Qh6 Kd8 2.Qh3 e6 3.Qh4+ Ke8 4.Qf6 h5 5.Qh6 f5 6.Qxh5+ Ke7 7.Qg5+ Kf7 8.Qf6+ Ke8 9.Kb7 f4 10.Kxb8 f3 11.Qxf3 Qxg7 12.Qc3 Qg1 13.Kc7 Kf7 14.Kxb6 Kg6 15.b4 Qf1 16.Qc5 Qf7 17.b5 Kf5 18.Ka6 Qg8 19.b6 Qa8+ 20.Kb5 Ke4 21.Qc7 Qe8+ 22.Qc6 
  +- (4.20 ++)  Depth: 38/56   00:00:10  387MN
1.Qh6 Kd8 2.Qh3 e6 3.Qh4+ Ke8 4.Qf6 h5 5.Qh6 f5 6.Qxh5+ Ke7 7.Qg5+ Kf7 8.Qf6+ Ke8 9.Kb7 f4 10.Kxb8 f3 11.Qxf3 Qxg7 12.Qc3 Qg1 13.Kc7 Kf7 14.Kxb6 Kg6 15.b4 Qf1 16.Qc5 Qf7 17.b5 Kf5 18.Ka6 Qg8 19.b6 Qa8+ 20.Kb5 Ke4 21.Qc7 Qe8+ 22.Qc6 
  +- (4.30 ++)  Depth: 38/63   00:00:10  391MN
1.Qh6 Kd8 2.Qh3 e6 3.Qh4+ Ke8 4.Qf6 h5 5.Qh6 f5 6.Qxh5+ Ke7 7.Qg5+ Kf7 8.Qf6+ Ke8 9.Kb7 f4 10.Kxb8 f3 11.Qxf3 Qxg7 12.Qc3 Qg1 13.Kc7 Kf7 14.Kxb6 Kg6 15.b4 Qf1 16.Qc5 Qf7 17.b5 Kf5 18.Ka6 Qg8 19.b6 Qa8+ 20.Kb5 Ke4 21.Qc7 Qe8+ 22.Qc6 
  +- (4.44 ++)  Depth: 38/63   00:00:10  402MN
1.Qh6 Kd8 2.Qh3 e6 3.Qh4+ Ke8 4.Qf6 h5 5.Qh6 f5 6.Qxh5+ Ke7 7.Qg5+ Kf7 8.Qf6+ Ke8 9.Kb7 f4 10.Kxb8 f3 11.Qxf3 Qxg7 12.Qc3 Qg1 13.Kc7 Kf7 14.Kxb6 Kg6 15.b4 Qf1 16.Qc5 Qf7 17.b5 Kf5 18.Ka6 Qg8 19.b6 Qa8+ 20.Kb5 Ke4 21.Qc7 Qe8+ 22.Qc6 
  +- (4.63 ++)  Depth: 38/63   00:00:11  417MN
1.Qh6 Kd8 2.Qh3 e6 3.Qh4+ Ke8 4.Qf6 h5 5.Qh6 f5 6.Qxh5+ Ke7 7.Qg5+ Kf7 8.Qf6+ Ke8 9.Kb7 f4 10.Kxb8 f3 11.Qxf3 Qxg7 12.Qc3 Qg1 13.Kc7 Kf7 14.Kxb6 Kg6 15.b4 Qf1 16.Qc5 Qf7 17.b5 Kf5 18.Ka6 Qg8 19.b6 Qa8+ 20.Kb5 Ke4 21.Qc7 Qe8+ 22.Qc6 
  +- (4.90 ++)  Depth: 38/63   00:00:11  435MN
1.Qh6 Kd8 2.Qh3 e6 3.Qh4+ Ke8 4.Qf6 h5 5.Qh6 f5 6.Qxh5+ Ke7 7.Qg5+ Kf7 8.Qf6+ Ke8 9.Kb7 f4 10.Kxb8 f3 11.Qxf3 Qxg7 12.Qc3 Qg1 13.Kc7 Kf7 14.Kxb6 Kg6 15.b4 Qf1 16.Qc5 Qf7 17.b5 Kf5 18.Ka6 Qg8 19.b6 Qa8+ 20.Kb5 Ke4 21.Qc7 Qe8+ 22.Qc6 
  +- (5.26 ++)  Depth: 38/63   00:00:12  476MN
1.Qh6 Kd8 2.Qh3 e6 3.Qh4+ Ke8 4.Qf6 b5 5.b4 h5 6.Qh6 f5 7.Qxh5+ Ke7 8.Qg5+ Ke8 9.Qg6+ Kd8 10.Qf6+ Ke8 11.Kb7 Ba7 12.Kxa7 f4 13.Kb8 f3 14.Qxf3 Qxg7 15.Qe2 Kd8 16.Qc2 Qd7 17.Qc5 Ke8 18.Qc8+ Qd8 19.Qxd8+ Kxd8 20.Kb7 Kd7 21.Kb6 Kc8 22.Kc6 Kd8 23.Kxb5 Kc7 24.Ka6 Kd7 25.b5 
  +- (5.44)  Depth: 38/63   00:00:13  489MN
1.Qh6 Kd8 2.Qh3 e6 3.Qh4+ Ke8 4.Qf6 b5 5.b4 h5 6.Qh6 f5 7.Qxh5+ Ke7 8.Qg5+ Ke8 9.Qg6+ Kd8 10.Qf6+ Ke8 11.Kb7 Ba7 12.Kxa7 f4 13.Kb8 f3 14.Qxf3 Qxg7 15.Qe2 Kd8 16.Qc2 Qd7 17.Qc5 Ke8 18.Qc8+ Qd8 19.Qxd8+ Kxd8 20.Kb7 Kd7 21.Kb6 Kc8 22.Kc6 Kd8 23.Kxb5 Kc7 24.Ka6 Kd7 25.b5 
  +- (5.53 ++)  Depth: 39/58   00:00:14  552MN
1.Qh6 Kd8 2.Qh3 e6 3.Qh4+ Ke8 4.Qf6 b5 5.b4 h5 6.Qh6 f5 7.Qxh5+ Ke7 8.Qg5+ Ke8 9.Qg6+ Kd8 10.Qf6+ Ke8 11.Kb7 Ba7 12.Kxa7 f4 13.Kb8 f3 14.Qxf3 Qxg7 15.Qe2 Kd8 16.Qc2 Qd7 17.Qc5 Ke8 18.Qc8+ Qd8 19.Qxd8+ Kxd8 20.Kb7 Kd7 21.Kb6 Kc8 22.Kc6 Kd8 23.Kxb5 Kc7 24.Ka6 Kd7 25.b5 
  +- (5.63 ++)  Depth: 39/59   00:00:14  567MN
1.Qh6 Kd8 2.Qh3 e6 3.Qh4+ Ke8 4.Qf6 b5 5.b4 h5 6.Qh6 f5 7.Qxh5+ Ke7 8.Qg5+ Ke8 9.Qg6+ Kd8 10.Qf6+ Ke8 11.Kb7 Ba7 12.Kxa7 f4 13.Kb8 f3 14.Qxf3 Qxg7 15.Qe2 Kd8 16.Qc2 Qd7 17.Qc5 Ke8 18.Qc8+ Qd8 19.Qxd8+ Kxd8 20.Kb7 Kd7 21.Kb6 Kc8 22.Kc6 Kd8 23.Kxb5 Kc7 24.Ka6 Kd7 25.b5 
  +- (5.77 ++)  Depth: 39/59   00:00:15  578MN
1.Qh6 Kd8 2.Qh3 e6 3.Qh4+ Ke8 4.Qf6 b5 5.b4 h5 6.Qh6 f5 7.Qxh5+ Ke7 8.Qg5+ Ke8 9.Qg6+ Kd8 10.Qf6+ Ke8 11.Kb7 Ba7 12.Kxa7 f4 13.Kb8 f3 14.Qxf3 Qxg7 15.Qe2 Kd8 16.Qc2 Qd7 17.Qc5 Ke8 18.Qc8+ Qd8 19.Qxd8+ Kxd8 20.Kb7 Kd7 21.Kb6 Kc8 22.Kc6 Kd8 23.Kxb5 Kc7 24.Ka6 Kd7 25.b5 
  +- (5.97 ++)  Depth: 39/59   00:00:15  591MN
1.Qh6 Kd8 2.Qh3 e6 3.Qh4+ Ke8 4.Qf6 b5 5.b4 h5 6.Qh6 f5 7.Qxh5+ Ke7 8.Qg5+ Ke8 9.Qg6+ Kd8 10.Qf6+ Ke8 11.Kb7 Ba7 12.Kxa7 f4 13.Kb8 f3 14.Qxf3 Qxg7 15.Qe2 Kd8 16.Qc2 Qd7 17.Qc5 Ke8 18.Qc8+ Qd8 19.Qxd8+ Kxd8 20.Kb7 Kd7 21.Kb6 Kc8 22.Kc6 Kd8 23.Kxb5 Kc7 24.Ka6 Kd7 25.b5 
  +- (6.23 ++)  Depth: 39/59   00:00:16  612MN
1.Qh6 e6 
  +- (5.30 --)  Depth: 39/62   00:00:17  660MN
1.Qh6 e6 
  +- (5.97 ++)  Depth: 39/62   00:00:17  664MN
1.Qh6 e6 
  +- (6.58 ++)  Depth: 39/62   00:00:18  733MN
1.Qh6 e6 
  +- (7.36 ++)  Depth: 39/62   00:00:20  793MN

ChiefPushesWood
Posts: 58
Joined: Thu Nov 08, 2018 5:30 pm
Full name: Chief PushesWood

Re: SF Dev need 150s (2.5 min) to find Qh6

Post by ChiefPushesWood » Mon May 20, 2019 12:32 am

Hey Uri,
I know (I think) you don't play CC anymore, but if you were to, which engine would be your main engine today? I was just looking at your post and I was just wondering.

CPW

Uri Blass
Posts: 8586
Joined: Wed Mar 08, 2006 11:37 pm
Location: Tel-Aviv Israel

Re: SF Dev need 150s (2.5 min) to find Qh6

Post by Uri Blass » Mon May 20, 2019 1:38 am

I do not know.

I do not have a gpu today so I do not use lc0.

It may be interesting to know how many studies stockfish cannot solve in a reasonable time but can see the solution after I show it to it.

Here is one of them.
I think that the problem is that engines do not have evaluation of at least a draw and at most a draw.

There are 6 moves that have 0.00 evaluation based on multi-pv
1.Rxf8
1.gxf7
1.Rb1
1.Re4+
1.Rd8
1.Rb6

1.Rxf8 is the choice because this move looks better at small depths but I believe that chess engines should prove perpetual check for black after
1.Rxf8 so score it as -0.01 or 0.00 if both sides can force a draw.
I believe that engines should be able to prove that black can force a draw in all the other lines except Rb1 when white is the side that can force a draw so Rb1 should be evaluated as better only for this reason even without seeing the win because a move when one side can force a draw and you are not sure that the opponent can force a draw is at least a draw and better than a draw so the score should be at least 0.01 for white.




Stockfish_19051511_x64_modern:
1/2 00:00 916 305k +14.48 1.Re8+ Kf1 2.Rxf8
2/4 00:00 3k 647k +14.19 1.Re4+ Kf2 2.Rxf8 Qc7+ 3.Kh3
3/5 00:00 5k 1,022k +13.54 1.gxf7 Qc7+ 2.Kg2 Qxb8 3.Qe4+ Kd1 4.gxh6
4/7 00:00 7k 1,234k +12.56 1.Rb1 Bd6+ 2.Kh1 Qxb1 3.gxf7 Qb7+ 4.Re4+ Kd1
5/6 00:00 8k 1,291k +13.05 1.Rb1 Bd6+ 2.Kh1 Qxb1 3.gxf7
6/7 00:00 8k 1,379k +13.05 1.Rb1 Bd6+ 2.Kh1 Qxb1 3.gxf7 Qb3
7/10 00:00 9k 1,264k +13.11 1.Rb1 Bd6+ 2.Kh1 Qxb1 3.gxf7 Qb3 4.Qe4+ Kd1 5.Rd4+ Kc1 6.Qe1+ Kb2 7.Qd2+ Kxa3
8/9 00:00 11k 1,369k +13.05 1.Rb1 Bd6+ 2.Kh1 Qxb1 3.gxf7 Qxh7 4.g6 Qh8 5.Re4+ Kd1
9/17 00:00 50k 1,867k +11.12 1.gxf7 Bd6+ 2.Kg2 Qd2+ 3.Kh3 Qh2+ 4.Kg4 Qg3+ 5.Kf5 Qd3+ 6.Re4+ Kf2 7.Rbe8 hxg5 8.hxg5
10/15 00:00 58k 1,922k +11.12 1.gxf7 Bd6+ 2.Kh3 Qe3+ 3.Kg4 Qe2+ 4.Kf5 Qd3+ 5.Re4+ Kf2 6.Rbe8 hxg5 7.hxg5 Qd5+ 8.Kg6
11/23 00:00 534k 3,844k +7.28 1.Rb1 Bd6+ 2.Kg1 Bc5+ 3.Kg2 Qxb1 4.gxf7 Qb2+ 5.Kh1 Qc1 6.f8Q Bxf8 7.Qf5 Bc5 8.Rg4 Be3 9.Kh2 Qc7+ 10.Kh3 Qc3 11.Qe4 Kd2
12/26 00:00 537k 3,836k +7.69 1.Rb1 Bd6+ 2.Kg1 Bc5+ 3.Kg2 Qxb1 4.gxf7 Qb2+ 5.Kh1 Qc1 6.f8Q Bxf8 7.Qf5 Bc5 8.Rg4 Be3 9.Kh2
13/22 00:00 542k 3,846k +7.87 1.Rb1 Bd6+ 2.Kg1 Bc5+ 3.Kg2 Qxb1 4.gxf7 Qb2+ 5.Kh1 Qc1 6.f8Q Bxf8 7.Qf5 Bc5 8.Rg4 Be3 9.Kh2 hxg5 10.hxg5 Qd1 11.Kh3
14/28 00:00 595k 3,814k +7.28 1.Rb1 Bd6+ 2.Kg1 Bc5+ 3.Kg2 Qxb1 4.gxf7 Qb2+ 5.Kh1 Qc1 6.f8Q Bxf8 7.Qf5 Bc5 8.Rg4 Be3 9.Kh2 Qc7+ 10.Kh3 Qc3 11.Qe4 Kd2
15/28 00:00 644k 3,742k +6.94 1.Rb1 Bd6+ 2.Kg1 Bc5+ 3.Kg2 Qxb1 4.gxf7 Qb2+ 5.Kh1 Qc1 6.f8Q Bxf8 7.Qf5 Bc5 8.Rg4 Be3 9.Kh2 Qc7+ 10.Kh3 Qc3 11.Rg2 hxg5 12.hxg5 Bc5+ 13.Rg3
16/32 00:00 650k 3,736k +7.87 1.Rb1 Bd6+ 2.Kg1 Bc5+ 3.Kg2 Qxb1 4.gxf7 Qb2+ 5.Kh1 Qc1 6.f8Q Bxf8 7.Qf5 Bc5 8.Rg4 Be3 9.Kh2 Qc7+ 10.Kh3 Qc3 11.Qe4 Kd2
17/32 00:00 726k 3,703k +7.87 1.Rb1 Bd6+ 2.Kg1 Bc5+ 3.Kg2 Qxb1 4.gxf7 Qb2+ 5.Kh1 Qc1 6.f8Q Bxf8 7.Qf5 Bc5 8.Rg4 Be3 9.Kh2 Qc7+ 10.Kh3 Qc3 11.Qe4 Kd2 12.Rg3 Qxa3 13.Qg2+ Ke1 14.Qf3 Kd2 15.Rg2+ Kd3 16.Qd5+ Kc3
18/43 00:00 821k 3,541k +7.57 1.Rb1 Bd6+ 2.Kg1 Bc5+ 3.Kg2 Qxb1 4.gxf7 Qb2+ 5.Kh1 Qc1 6.f8Q Bxf8 7.Qf5 Bc5 8.Rg4 Be3 9.Kh2 Qd1 10.gxh6 gxh6 11.Rg2 Qd6+ 12.Kh1 Qf4 13.Qb1+ Bc1 14.Qd3 Qe3 15.Rg1+ Kf2 16.Qc2+ Bd2 17.Qf5+ Qf3+ 18.Rg2+ Ke3 19.Qxf3+ Kxf3 20.Rxd2 Kg4 21.Kg2 Kxh5
19/46 00:00 996k 3,544k +7.87 1.Rb1 Bd6+ 2.Kg1 Bc5+ 3.Kg2 Qxb1 4.gxf7 Qb2+ 5.Kh1 Qc1 6.f8Q Bxf8 7.Qf5 Bc5 8.Rg4 Be3 9.Kh2 Qc7+ 10.Kh3 Qc3 11.Qe4 Kd2 12.Rg3 Qc5 13.Kh2 hxg5 14.hxg5 Qc3 15.h6 gxh6
20/38 00:00 1,217k 3,621k +8.36 1.Rb1 Bd6+ 2.Kg1 Bc5+ 3.Kg2 Qxb1 4.gxf7 Qb2+ 5.Kh1 Qc1 6.f8Q Bxf8 7.Qf5 Bc5 8.Rg4 Be3 9.Kh2 Qc7+ 10.Kh3 Qb7 11.Rg3 Bd4 12.Rf3 Qb2 13.Rd3 Qe2 14.Rxd4 hxg5 15.Qxg5
21/38 00:00 1,704k 3,822k +13.06 1.Rb1 Bd6+ 2.Kh1 Qxb1 3.gxf7 Qxh7 4.g6 Qh8 5.Re4+ Kd2 6.Re8 Qf8 7.a4 Kc3 8.Rxf8 Bxf8 9.a5 Bc5 10.a6 Kb4 11.a7 Bxa7 12.f8Q+ Bc5 13.Qxg7
22/50 00:00 2,997k 4,198k +13.56 1.Rb1 Bd6+ 2.Kh1 Qxb1 3.gxf7 Qd1 4.f8Q Bxf8 5.Rf4 Bc5 6.Qe4+ Kd2+ 7.Kg2 Qb3 8.Rf5 Be3 9.Re5 Qc3 10.a4 Bb6 11.Qe1+ Kc2 12.Re2+ Kd3 13.Qd1+ Kc4 14.Rc2 Ba5 15.Qf1+ Kd4 16.Qf4+ Kd5 17.Qf5+ Kd4 18.Rxc3 Bxc3 19.g6 Kc4 20.Qf7+ Kc5
23/49 00:00 4,271k 4,380k +13.56 1.Rb1 Bd6+ 2.Kh1 Qxb1 3.gxf7 Qd1 4.f8Q Bxf8 5.Rf4 Bc5 6.Qe4+ Kd2+ 7.Kg2 Qb3 8.Rf5 Be3 9.Re5 Qc3 10.a4 hxg5 11.hxg5 Bb6 12.h6 gxh6 13.gxh6 Kc1 14.h7 Qd2+ 15.Kg3 Qc3+ 16.Kf4
24/53 00:01 7,043k 4,552k +13.73 1.Rb1 Qxb1 2.gxf7 Bd6+ 3.Kh1 Qd1 4.f8Q Bxf8 5.Rf4 Bc5 6.Qe4+ Kd2+ 7.Kg2 Qg1+ 8.Kh3 hxg5 9.Qd5+ Ke1 10.hxg5 Be3 11.Qe4 Kd2 12.Rg4 Qe1 13.Rg3 Qe2 14.Rg2 Bf2 15.Qxe2+ Kxe2 16.Kh2 Ke1 17.Rxf2 Kxf2 18.h6 g6 19.h7
25/49 00:02 10,175k 4,651k +13.73 1.Rb1 Bd6+ 2.Kh1 Qxb1 3.gxf7 Qd1 4.f8Q Bxf8 5.Rf4 Bc5 6.Qe4+ Kd2+ 7.Kg2 Qg1+ 8.Kh3 hxg5 9.Qd5+ Ke1 10.hxg5 Be3 11.Qe4 Kd2 12.Rg4 Qe1 13.Rg3 Qe2 14.Rg2 Bf2 15.Qxe2+ Kxe2 16.Kh2 Ke1 17.Rxf2 Kxf2 18.h6 Ke1 19.h7 Kd2
26/39 00:02 12,690k 4,677k +13.73 1.Rb1 Bd6+ 2.Kh1 Qxb1 3.gxf7 Qd1 4.f8Q Bxf8 5.Rf4 Bc5 6.Qe4+ Kd2+ 7.Kg2 Qg1+ 8.Kh3 hxg5 9.Qd5+ Ke1 10.hxg5 Be3 11.Qe4 Kd2 12.Rg4 Qe1 13.Rg3 Qe2 14.Rg2 Bf2 15.Qxe2+ Kxe2 16.Kh2 Ke1 17.Rxf2 Kxf2 18.h6 Ke1 19.h7 Kd2 20.h8Q
27/55+ 00:03 14,536k 4,721k +13.83 1.Rb1
27/55+ 00:03 15,866k 4,737k +13.92 1.Rb1
27/55+ 00:04 19,232k 4,772k +14.06 1.Rb1
27/55- 00:04 19,590k 4,776k +13.62 1.Rb1 Bd6+
27/55+ 00:04 23,118k 4,822k +13.95 1.Rb1
27/55 00:05 24,472k 4,834k +13.56 1.Rb1 Bd6+ 2.Kh1 Qxb1 3.gxf7 Qd1 4.f8Q Bxf8 5.Rf4 Bc5 6.Qe4+ Kd2+ 7.Kg2 Qg1+ 8.Kh3 hxg5 9.Qd5+ Ke1 10.hxg5 Qe3+ 11.Kg4 Qe2+ 12.Kf5 Be3 13.Qe4 Qb5+ 14.Kg6 Qc5 15.Qb4+ Qxb4 16.Rxb4 Bd2 17.Rc4 Ke2 18.Kxg7 Bxg5 19.h6 Kf2 20.h7
28/41+ 00:05 26,287k 4,836k +13.65 1.Rb1
28/48 00:05 27,929k 4,827k +13.73 1.Rb1 Bd6+ 2.Kh1 Qxb1 3.gxf7 Qd1 4.f8Q Bxf8 5.Rf4 Bc5 6.Qe4+ Kd2+ 7.Kg2 Qg1+ 8.Kh3 hxg5 9.Qd5+ Ke1 10.hxg5 Be3 11.Qe4 Kd2 12.Rg4 Qe1 13.Rg3 Qe2 14.Rg2 Bf2 15.Qxe2+ Kxe2 16.Kh2 Ke1 17.Rxf2 Kxf2 18.h6 Ke1 19.h7
29/39 00:06 32,408k 4,804k +13.65 1.Rb1 Bd6+ 2.Kh1 Qxb1 3.gxf7 Qd1 4.f8Q Bxf8 5.Rf4 hxg5 6.hxg5 Bc5 7.Qe4+ Kd2+ 8.Kg2 Qg1+ 9.Kf3 Qh1+ 10.Kg4 Qxe4 11.Rxe4 Kc3 12.Rf4 Kb3 13.Rf7 Bd4 14.Rf3+ Ka2 15.a4 Bb6 16.Rf7 Ka3 17.Rxg7 Bd4 18.h6 Kxa4 19.Rd7 Bc3 20.g6
30/49+ 00:07 35,618k 4,828k +13.75 1.Rb1
30/51+ 00:07 37,641k 4,813k +13.84 1.Rb1
30/51+ 00:08 40,008k 4,828k +13.98 1.Rb1
30/51- 00:08 42,912k 4,834k +13.54 1.Rb1 Bd6+
30/52+ 00:09 44,755k 4,831k +13.87 1.Rb1
30/53+ 00:10 51,571k 4,841k +14.23 1.Rb1
30/53 00:11 53,411k 4,837k +14.34 1.Rb1 Bd6+ 2.Kh1 Qxb1 3.gxf7 Qd1 4.f8Q Bxf8 5.Rf4 Bc5 6.Qe4+ Kd2+ 7.Kg2 Qg1+ 8.Kh3 hxg5 9.Qd5+ Ke1 10.hxg5 Qe3+ 11.Kg4 Qe2+ 12.Kf5 Be3 13.Qe4 Kd2 14.Qb4+ Kd1 15.Qb1+ Kd2 16.Qa2+ Kd3 17.Qxe2+ Kxe2 18.Re4 Kf3 19.Rxe3+ Kxe3 20.Kg6 Kf2 21.Kxg7 Kg2 22.h6 Kh3 23.Kg6 Kg3 24.h7
31/54- 00:12 58,742k 4,836k +14.24 1.Rb1 Bd6+
31/54- 00:12 60,223k 4,828k +14.15 1.Rb1 Bd6+
31/54- 00:12 61,071k 4,823k +14.01 1.Rb1 Bd6+
31/54+ 00:13 62,715k 4,823k +14.13 1.Rb1
31/54- 00:13 66,042k 4,830k +13.81 1.Rb1 Bd6+
31/54+ 00:13 66,867k 4,824k +14.10 1.Rb1
31/56 00:19 93,840k 4,808k +14.41 1.Rb1 Bd6+ 2.Kh1 Qxb1 3.gxf7 Qd1 4.f8Q Bxf8 5.Rf4 hxg5 6.hxg5 Bc5 7.Qe4+ Kd2+ 8.Kg2 Qg1+ 9.Kf3 Kc1 10.Qd3 Kb2 11.Re4 Qc1 12.Rc4 Qh1+ 13.Kf4 Qh2+ 14.Kf5 Bf8 15.Kg6 Qd6+ 16.Qxd6 Bxd6 17.Re4 Kxa3 18.Kxg7 Kb3 19.h6 Bc5 20.g6 Bb4 21.h7
32/59+ 00:26 121,965k 4,636k +14.50 1.Rb1
32/59+ 00:33 154,372k 4,563k +14.60 1.Rb1
32/59+ 00:37 170,310k 4,576k +14.74 1.Rb1
32/59 00:41 187,026k 4,542k +14.74 1.Rb1 Bd6+ 2.Kh1 Qxb1 3.gxf7 Qd1 4.f8Q Bxf8 5.Rf4 hxg5 6.hxg5 Bc5 7.Qe4+ Kd2+ 8.Kg2 Qg1+ 9.Kf3 Qh1+ 10.Kg4 Qxe4 11.Rxe4 Bxa3 12.Ra4 Bf8 13.Ra7 Ke3 14.Rf7 Bb4 15.Rxg7 Ke4 16.h6 Bc3 17.Rb7 Kd5 18.g6
33/46 00:46 206,977k 4,493k +14.74 1.Rb1 Bd6+ 2.Kh1 Qxb1 3.gxf7 Qd1 4.f8Q Bxf8 5.Rf4 hxg5 6.hxg5 Bc5 7.Qe4+ Kd2+ 8.Kg2 Qg1+ 9.Kf3 Kc1 10.Qd3 Kb2 11.Re4 Qc1 12.Rc4 Qh1+ 13.Kf4 Qh2+ 14.Kf5 Bf8 15.Kg6 Qd6+ 16.Qxd6 Bxd6 17.Re4 Bf8 18.Kf7 Bxa3 19.Kxg7 Kb1 20.g6 Bd6 21.h6 Kc2
34/43+ 00:48 215,954k 4,489k +14.83 1.Rb1
34/56- 00:52 237,980k 4,517k +14.64 1.Rb1 Bd6+
34/60+ 00:55 251,366k 4,544k +14.78 1.Rb1
34/60+ 01:04 298,513k 4,599k +14.98 1.Rb1
34/60+ 01:11 324,125k 4,562k +15.25 1.Rb1
34/60 01:12 332,961k 4,568k +15.16 1.Rb1 Bd6+ 2.Kh1 Qxb1 3.gxf7 Qd1 4.f8Q Bxf8 5.Rf4 hxg5 6.hxg5 Bc5 7.Qe4+ Kd2+ 8.Kg2 Qg1+ 9.Kf3 Kc1 10.Qd3 Kb2 11.Re4 Qc1 12.Rc4 Qh1+ 13.Kf4 Qh2+ 14.Kf5 Bf8 15.Kg6 Qd6+ 16.Qxd6 Bxd6 17.Re4 Bf8 18.Kf7 Bxa3 19.Kxg7
35/51 01:20 370,845k 4,585k +15.25 1.Rb1 Bd6+ 2.Kh1 Qxb1 3.gxf7 Qd1 4.f8Q Bxf8 5.Rf4 hxg5 6.hxg5 Bc5 7.Qe4+ Kd2+ 8.Kg2 Qg1+ 9.Kf3 Kc1 10.Qd3 Kb2 11.Re4 Qc1 12.Rc4 Qh1+ 13.Kf4 Qh2+ 14.Kf5 Bf8 15.Kg6 Qd6+ 16.Qxd6 Bxd6 17.Re4 Bf8 18.Kf7 Bxa3 19.Kxg7 Kb1 20.g6 Ka2 21.h6 Bb2+ 22.Kf7 Bc3 23.g7
36/49+ 01:23 384,311k 4,586k +15.34 1.Rb1
36/59+ 01:31 422,555k 4,610k +15.44 1.Rb1
36/61+ 01:49 510,672k 4,655k +15.58 1.Rb1
36/63+ 02:02 574,459k 4,671k +15.77 1.Rb1
36/63 02:05 584,586k 4,671k +15.40 1.Rb1 Bd6+ 2.Kh1 Qxb1 3.gxf7 Qd1 4.f8Q Bxf8 5.Rf4 Bc5 6.Qe4+ Kd2+ 7.Kg2 Qg1+ 8.Kh3 hxg5 9.Qd5+ Ke1 10.hxg5 Qe3+ 11.Kg4 Qe2+ 12.Kf5 Be3 13.Qe4 Qb5+ 14.Kg6 Qb6+ 15.Kxg7 Qc7+ 16.Rf7 Qc5 17.g6 Kd2 18.h6 Qc8 19.h7 Qd8 20.Qg2+ Kd3 21.Qf1+ Kc2 22.Qe2+ Bd2 23.h8Q Qd4+ 24.Rf6 Qa7+ 25.Kg8 Qa8+ 26.Kh7
37/66+ 02:08 602,595k 4,674k +15.49 1.Rb1
37/66+ 02:17 641,931k 4,684k +15.59 1.Rb1
37/66+ 02:21 663,004k 4,690k +15.73 1.Rb1
37/66+ 02:36 740,009k 4,721k +15.92 1.Rb1
37/66+ 02:47 794,644k 4,733k +16.19 1.Rb1
37/66 02:51 814,132k 4,739k +16.05 1.Rb1 Bd6+ 2.Kh1 Qxb1 3.gxf7 Qd1 4.f8Q Bxf8 5.Rf4 Bc5 6.Qe4+ Kd2+ 7.Kg2 Qg1+ 8.Kh3 Qc1 9.Qd5+ Ke2 10.Rc4 Qf1+ 11.Kg4 Qg1+ 12.Kf5 Qb1+ 13.Ke6 Bf2 14.Kf7 Qb2 15.Qe4+ Kf1 16.Qh1+ Ke2 17.Re4+ Kd2 18.Qf3 Qb7+ 19.Kg6 Qa6+ 20.Kxg7 Bc5 21.g6 Qd3 22.Qxd3+ Kxd3 23.Rg4 Ke2 24.Kxh6 Kf3 25.Rc4 Bd6

User avatar
Master Om
Posts: 330
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Location: INDIA

Re: SF Dev need 150s (2.5 min) to find Qh6

Post by Master Om » Wed May 22, 2019 5:15 pm

Uri Blass wrote:
Mon May 20, 2019 1:38 am
I do not know.

I do not have a gpu today so I do not use lc0.

It may be interesting to know how many studies stockfish cannot solve in a reasonable time but can see the solution after I show it to it.

Here is one of them.
I think that the problem is that engines do not have evaluation of at least a draw and at most a draw.

There are 6 moves that have 0.00 evaluation based on multi-pv
1.Rxf8
1.gxf7
1.Rb1
1.Re4+
1.Rd8
1.Rb6

1.Rxf8 is the choice because this move looks better at small depths but I believe that chess engines should prove perpetual check for black after
1.Rxf8 so score it as -0.01 or 0.00 if both sides can force a draw.
I believe that engines should be able to prove that black can force a draw in all the other lines except Rb1 when white is the side that can force a draw so Rb1 should be evaluated as better only for this reason even without seeing the win because a move when one side can force a draw and you are not sure that the opponent can force a draw is at least a draw and better than a draw so the score should be at least 0.01 for white.




Stockfish_19051511_x64_modern:
1/2 00:00 916 305k +14.48 1.Re8+ Kf1 2.Rxf8
2/4 00:00 3k 647k +14.19 1.Re4+ Kf2 2.Rxf8 Qc7+ 3.Kh3
3/5 00:00 5k 1,022k +13.54 1.gxf7 Qc7+ 2.Kg2 Qxb8 3.Qe4+ Kd1 4.gxh6
4/7 00:00 7k 1,234k +12.56 1.Rb1 Bd6+ 2.Kh1 Qxb1 3.gxf7 Qb7+ 4.Re4+ Kd1
5/6 00:00 8k 1,291k +13.05 1.Rb1 Bd6+ 2.Kh1 Qxb1 3.gxf7
6/7 00:00 8k 1,379k +13.05 1.Rb1 Bd6+ 2.Kh1 Qxb1 3.gxf7 Qb3
7/10 00:00 9k 1,264k +13.11 1.Rb1 Bd6+ 2.Kh1 Qxb1 3.gxf7 Qb3 4.Qe4+ Kd1 5.Rd4+ Kc1 6.Qe1+ Kb2 7.Qd2+ Kxa3
8/9 00:00 11k 1,369k +13.05 1.Rb1 Bd6+ 2.Kh1 Qxb1 3.gxf7 Qxh7 4.g6 Qh8 5.Re4+ Kd1
9/17 00:00 50k 1,867k +11.12 1.gxf7 Bd6+ 2.Kg2 Qd2+ 3.Kh3 Qh2+ 4.Kg4 Qg3+ 5.Kf5 Qd3+ 6.Re4+ Kf2 7.Rbe8 hxg5 8.hxg5
10/15 00:00 58k 1,922k +11.12 1.gxf7 Bd6+ 2.Kh3 Qe3+ 3.Kg4 Qe2+ 4.Kf5 Qd3+ 5.Re4+ Kf2 6.Rbe8 hxg5 7.hxg5 Qd5+ 8.Kg6
11/23 00:00 534k 3,844k +7.28 1.Rb1 Bd6+ 2.Kg1 Bc5+ 3.Kg2 Qxb1 4.gxf7 Qb2+ 5.Kh1 Qc1 6.f8Q Bxf8 7.Qf5 Bc5 8.Rg4 Be3 9.Kh2 Qc7+ 10.Kh3 Qc3 11.Qe4 Kd2
12/26 00:00 537k 3,836k +7.69 1.Rb1 Bd6+ 2.Kg1 Bc5+ 3.Kg2 Qxb1 4.gxf7 Qb2+ 5.Kh1 Qc1 6.f8Q Bxf8 7.Qf5 Bc5 8.Rg4 Be3 9.Kh2
13/22 00:00 542k 3,846k +7.87 1.Rb1 Bd6+ 2.Kg1 Bc5+ 3.Kg2 Qxb1 4.gxf7 Qb2+ 5.Kh1 Qc1 6.f8Q Bxf8 7.Qf5 Bc5 8.Rg4 Be3 9.Kh2 hxg5 10.hxg5 Qd1 11.Kh3
14/28 00:00 595k 3,814k +7.28 1.Rb1 Bd6+ 2.Kg1 Bc5+ 3.Kg2 Qxb1 4.gxf7 Qb2+ 5.Kh1 Qc1 6.f8Q Bxf8 7.Qf5 Bc5 8.Rg4 Be3 9.Kh2 Qc7+ 10.Kh3 Qc3 11.Qe4 Kd2
15/28 00:00 644k 3,742k +6.94 1.Rb1 Bd6+ 2.Kg1 Bc5+ 3.Kg2 Qxb1 4.gxf7 Qb2+ 5.Kh1 Qc1 6.f8Q Bxf8 7.Qf5 Bc5 8.Rg4 Be3 9.Kh2 Qc7+ 10.Kh3 Qc3 11.Rg2 hxg5 12.hxg5 Bc5+ 13.Rg3
16/32 00:00 650k 3,736k +7.87 1.Rb1 Bd6+ 2.Kg1 Bc5+ 3.Kg2 Qxb1 4.gxf7 Qb2+ 5.Kh1 Qc1 6.f8Q Bxf8 7.Qf5 Bc5 8.Rg4 Be3 9.Kh2 Qc7+ 10.Kh3 Qc3 11.Qe4 Kd2
17/32 00:00 726k 3,703k +7.87 1.Rb1 Bd6+ 2.Kg1 Bc5+ 3.Kg2 Qxb1 4.gxf7 Qb2+ 5.Kh1 Qc1 6.f8Q Bxf8 7.Qf5 Bc5 8.Rg4 Be3 9.Kh2 Qc7+ 10.Kh3 Qc3 11.Qe4 Kd2 12.Rg3 Qxa3 13.Qg2+ Ke1 14.Qf3 Kd2 15.Rg2+ Kd3 16.Qd5+ Kc3
18/43 00:00 821k 3,541k +7.57 1.Rb1 Bd6+ 2.Kg1 Bc5+ 3.Kg2 Qxb1 4.gxf7 Qb2+ 5.Kh1 Qc1 6.f8Q Bxf8 7.Qf5 Bc5 8.Rg4 Be3 9.Kh2 Qd1 10.gxh6 gxh6 11.Rg2 Qd6+ 12.Kh1 Qf4 13.Qb1+ Bc1 14.Qd3 Qe3 15.Rg1+ Kf2 16.Qc2+ Bd2 17.Qf5+ Qf3+ 18.Rg2+ Ke3 19.Qxf3+ Kxf3 20.Rxd2 Kg4 21.Kg2 Kxh5
19/46 00:00 996k 3,544k +7.87 1.Rb1 Bd6+ 2.Kg1 Bc5+ 3.Kg2 Qxb1 4.gxf7 Qb2+ 5.Kh1 Qc1 6.f8Q Bxf8 7.Qf5 Bc5 8.Rg4 Be3 9.Kh2 Qc7+ 10.Kh3 Qc3 11.Qe4 Kd2 12.Rg3 Qc5 13.Kh2 hxg5 14.hxg5 Qc3 15.h6 gxh6
20/38 00:00 1,217k 3,621k +8.36 1.Rb1 Bd6+ 2.Kg1 Bc5+ 3.Kg2 Qxb1 4.gxf7 Qb2+ 5.Kh1 Qc1 6.f8Q Bxf8 7.Qf5 Bc5 8.Rg4 Be3 9.Kh2 Qc7+ 10.Kh3 Qb7 11.Rg3 Bd4 12.Rf3 Qb2 13.Rd3 Qe2 14.Rxd4 hxg5 15.Qxg5
21/38 00:00 1,704k 3,822k +13.06 1.Rb1 Bd6+ 2.Kh1 Qxb1 3.gxf7 Qxh7 4.g6 Qh8 5.Re4+ Kd2 6.Re8 Qf8 7.a4 Kc3 8.Rxf8 Bxf8 9.a5 Bc5 10.a6 Kb4 11.a7 Bxa7 12.f8Q+ Bc5 13.Qxg7
22/50 00:00 2,997k 4,198k +13.56 1.Rb1 Bd6+ 2.Kh1 Qxb1 3.gxf7 Qd1 4.f8Q Bxf8 5.Rf4 Bc5 6.Qe4+ Kd2+ 7.Kg2 Qb3 8.Rf5 Be3 9.Re5 Qc3 10.a4 Bb6 11.Qe1+ Kc2 12.Re2+ Kd3 13.Qd1+ Kc4 14.Rc2 Ba5 15.Qf1+ Kd4 16.Qf4+ Kd5 17.Qf5+ Kd4 18.Rxc3 Bxc3 19.g6 Kc4 20.Qf7+ Kc5
23/49 00:00 4,271k 4,380k +13.56 1.Rb1 Bd6+ 2.Kh1 Qxb1 3.gxf7 Qd1 4.f8Q Bxf8 5.Rf4 Bc5 6.Qe4+ Kd2+ 7.Kg2 Qb3 8.Rf5 Be3 9.Re5 Qc3 10.a4 hxg5 11.hxg5 Bb6 12.h6 gxh6 13.gxh6 Kc1 14.h7 Qd2+ 15.Kg3 Qc3+ 16.Kf4
24/53 00:01 7,043k 4,552k +13.73 1.Rb1 Qxb1 2.gxf7 Bd6+ 3.Kh1 Qd1 4.f8Q Bxf8 5.Rf4 Bc5 6.Qe4+ Kd2+ 7.Kg2 Qg1+ 8.Kh3 hxg5 9.Qd5+ Ke1 10.hxg5 Be3 11.Qe4 Kd2 12.Rg4 Qe1 13.Rg3 Qe2 14.Rg2 Bf2 15.Qxe2+ Kxe2 16.Kh2 Ke1 17.Rxf2 Kxf2 18.h6 g6 19.h7
25/49 00:02 10,175k 4,651k +13.73 1.Rb1 Bd6+ 2.Kh1 Qxb1 3.gxf7 Qd1 4.f8Q Bxf8 5.Rf4 Bc5 6.Qe4+ Kd2+ 7.Kg2 Qg1+ 8.Kh3 hxg5 9.Qd5+ Ke1 10.hxg5 Be3 11.Qe4 Kd2 12.Rg4 Qe1 13.Rg3 Qe2 14.Rg2 Bf2 15.Qxe2+ Kxe2 16.Kh2 Ke1 17.Rxf2 Kxf2 18.h6 Ke1 19.h7 Kd2
26/39 00:02 12,690k 4,677k +13.73 1.Rb1 Bd6+ 2.Kh1 Qxb1 3.gxf7 Qd1 4.f8Q Bxf8 5.Rf4 Bc5 6.Qe4+ Kd2+ 7.Kg2 Qg1+ 8.Kh3 hxg5 9.Qd5+ Ke1 10.hxg5 Be3 11.Qe4 Kd2 12.Rg4 Qe1 13.Rg3 Qe2 14.Rg2 Bf2 15.Qxe2+ Kxe2 16.Kh2 Ke1 17.Rxf2 Kxf2 18.h6 Ke1 19.h7 Kd2 20.h8Q
27/55+ 00:03 14,536k 4,721k +13.83 1.Rb1
27/55+ 00:03 15,866k 4,737k +13.92 1.Rb1
27/55+ 00:04 19,232k 4,772k +14.06 1.Rb1
27/55- 00:04 19,590k 4,776k +13.62 1.Rb1 Bd6+
27/55+ 00:04 23,118k 4,822k +13.95 1.Rb1
27/55 00:05 24,472k 4,834k +13.56 1.Rb1 Bd6+ 2.Kh1 Qxb1 3.gxf7 Qd1 4.f8Q Bxf8 5.Rf4 Bc5 6.Qe4+ Kd2+ 7.Kg2 Qg1+ 8.Kh3 hxg5 9.Qd5+ Ke1 10.hxg5 Qe3+ 11.Kg4 Qe2+ 12.Kf5 Be3 13.Qe4 Qb5+ 14.Kg6 Qc5 15.Qb4+ Qxb4 16.Rxb4 Bd2 17.Rc4 Ke2 18.Kxg7 Bxg5 19.h6 Kf2 20.h7
28/41+ 00:05 26,287k 4,836k +13.65 1.Rb1
28/48 00:05 27,929k 4,827k +13.73 1.Rb1 Bd6+ 2.Kh1 Qxb1 3.gxf7 Qd1 4.f8Q Bxf8 5.Rf4 Bc5 6.Qe4+ Kd2+ 7.Kg2 Qg1+ 8.Kh3 hxg5 9.Qd5+ Ke1 10.hxg5 Be3 11.Qe4 Kd2 12.Rg4 Qe1 13.Rg3 Qe2 14.Rg2 Bf2 15.Qxe2+ Kxe2 16.Kh2 Ke1 17.Rxf2 Kxf2 18.h6 Ke1 19.h7
29/39 00:06 32,408k 4,804k +13.65 1.Rb1 Bd6+ 2.Kh1 Qxb1 3.gxf7 Qd1 4.f8Q Bxf8 5.Rf4 hxg5 6.hxg5 Bc5 7.Qe4+ Kd2+ 8.Kg2 Qg1+ 9.Kf3 Qh1+ 10.Kg4 Qxe4 11.Rxe4 Kc3 12.Rf4 Kb3 13.Rf7 Bd4 14.Rf3+ Ka2 15.a4 Bb6 16.Rf7 Ka3 17.Rxg7 Bd4 18.h6 Kxa4 19.Rd7 Bc3 20.g6
30/49+ 00:07 35,618k 4,828k +13.75 1.Rb1
30/51+ 00:07 37,641k 4,813k +13.84 1.Rb1
30/51+ 00:08 40,008k 4,828k +13.98 1.Rb1
30/51- 00:08 42,912k 4,834k +13.54 1.Rb1 Bd6+
30/52+ 00:09 44,755k 4,831k +13.87 1.Rb1
30/53+ 00:10 51,571k 4,841k +14.23 1.Rb1
30/53 00:11 53,411k 4,837k +14.34 1.Rb1 Bd6+ 2.Kh1 Qxb1 3.gxf7 Qd1 4.f8Q Bxf8 5.Rf4 Bc5 6.Qe4+ Kd2+ 7.Kg2 Qg1+ 8.Kh3 hxg5 9.Qd5+ Ke1 10.hxg5 Qe3+ 11.Kg4 Qe2+ 12.Kf5 Be3 13.Qe4 Kd2 14.Qb4+ Kd1 15.Qb1+ Kd2 16.Qa2+ Kd3 17.Qxe2+ Kxe2 18.Re4 Kf3 19.Rxe3+ Kxe3 20.Kg6 Kf2 21.Kxg7 Kg2 22.h6 Kh3 23.Kg6 Kg3 24.h7
31/54- 00:12 58,742k 4,836k +14.24 1.Rb1 Bd6+
31/54- 00:12 60,223k 4,828k +14.15 1.Rb1 Bd6+
31/54- 00:12 61,071k 4,823k +14.01 1.Rb1 Bd6+
31/54+ 00:13 62,715k 4,823k +14.13 1.Rb1
31/54- 00:13 66,042k 4,830k +13.81 1.Rb1 Bd6+
31/54+ 00:13 66,867k 4,824k +14.10 1.Rb1
31/56 00:19 93,840k 4,808k +14.41 1.Rb1 Bd6+ 2.Kh1 Qxb1 3.gxf7 Qd1 4.f8Q Bxf8 5.Rf4 hxg5 6.hxg5 Bc5 7.Qe4+ Kd2+ 8.Kg2 Qg1+ 9.Kf3 Kc1 10.Qd3 Kb2 11.Re4 Qc1 12.Rc4 Qh1+ 13.Kf4 Qh2+ 14.Kf5 Bf8 15.Kg6 Qd6+ 16.Qxd6 Bxd6 17.Re4 Kxa3 18.Kxg7 Kb3 19.h6 Bc5 20.g6 Bb4 21.h7
32/59+ 00:26 121,965k 4,636k +14.50 1.Rb1
32/59+ 00:33 154,372k 4,563k +14.60 1.Rb1
32/59+ 00:37 170,310k 4,576k +14.74 1.Rb1
32/59 00:41 187,026k 4,542k +14.74 1.Rb1 Bd6+ 2.Kh1 Qxb1 3.gxf7 Qd1 4.f8Q Bxf8 5.Rf4 hxg5 6.hxg5 Bc5 7.Qe4+ Kd2+ 8.Kg2 Qg1+ 9.Kf3 Qh1+ 10.Kg4 Qxe4 11.Rxe4 Bxa3 12.Ra4 Bf8 13.Ra7 Ke3 14.Rf7 Bb4 15.Rxg7 Ke4 16.h6 Bc3 17.Rb7 Kd5 18.g6
33/46 00:46 206,977k 4,493k +14.74 1.Rb1 Bd6+ 2.Kh1 Qxb1 3.gxf7 Qd1 4.f8Q Bxf8 5.Rf4 hxg5 6.hxg5 Bc5 7.Qe4+ Kd2+ 8.Kg2 Qg1+ 9.Kf3 Kc1 10.Qd3 Kb2 11.Re4 Qc1 12.Rc4 Qh1+ 13.Kf4 Qh2+ 14.Kf5 Bf8 15.Kg6 Qd6+ 16.Qxd6 Bxd6 17.Re4 Bf8 18.Kf7 Bxa3 19.Kxg7 Kb1 20.g6 Bd6 21.h6 Kc2
34/43+ 00:48 215,954k 4,489k +14.83 1.Rb1
34/56- 00:52 237,980k 4,517k +14.64 1.Rb1 Bd6+
34/60+ 00:55 251,366k 4,544k +14.78 1.Rb1
34/60+ 01:04 298,513k 4,599k +14.98 1.Rb1
34/60+ 01:11 324,125k 4,562k +15.25 1.Rb1
34/60 01:12 332,961k 4,568k +15.16 1.Rb1 Bd6+ 2.Kh1 Qxb1 3.gxf7 Qd1 4.f8Q Bxf8 5.Rf4 hxg5 6.hxg5 Bc5 7.Qe4+ Kd2+ 8.Kg2 Qg1+ 9.Kf3 Kc1 10.Qd3 Kb2 11.Re4 Qc1 12.Rc4 Qh1+ 13.Kf4 Qh2+ 14.Kf5 Bf8 15.Kg6 Qd6+ 16.Qxd6 Bxd6 17.Re4 Bf8 18.Kf7 Bxa3 19.Kxg7
35/51 01:20 370,845k 4,585k +15.25 1.Rb1 Bd6+ 2.Kh1 Qxb1 3.gxf7 Qd1 4.f8Q Bxf8 5.Rf4 hxg5 6.hxg5 Bc5 7.Qe4+ Kd2+ 8.Kg2 Qg1+ 9.Kf3 Kc1 10.Qd3 Kb2 11.Re4 Qc1 12.Rc4 Qh1+ 13.Kf4 Qh2+ 14.Kf5 Bf8 15.Kg6 Qd6+ 16.Qxd6 Bxd6 17.Re4 Bf8 18.Kf7 Bxa3 19.Kxg7 Kb1 20.g6 Ka2 21.h6 Bb2+ 22.Kf7 Bc3 23.g7
36/49+ 01:23 384,311k 4,586k +15.34 1.Rb1
36/59+ 01:31 422,555k 4,610k +15.44 1.Rb1
36/61+ 01:49 510,672k 4,655k +15.58 1.Rb1
36/63+ 02:02 574,459k 4,671k +15.77 1.Rb1
36/63 02:05 584,586k 4,671k +15.40 1.Rb1 Bd6+ 2.Kh1 Qxb1 3.gxf7 Qd1 4.f8Q Bxf8 5.Rf4 Bc5 6.Qe4+ Kd2+ 7.Kg2 Qg1+ 8.Kh3 hxg5 9.Qd5+ Ke1 10.hxg5 Qe3+ 11.Kg4 Qe2+ 12.Kf5 Be3 13.Qe4 Qb5+ 14.Kg6 Qb6+ 15.Kxg7 Qc7+ 16.Rf7 Qc5 17.g6 Kd2 18.h6 Qc8 19.h7 Qd8 20.Qg2+ Kd3 21.Qf1+ Kc2 22.Qe2+ Bd2 23.h8Q Qd4+ 24.Rf6 Qa7+ 25.Kg8 Qa8+ 26.Kh7
37/66+ 02:08 602,595k 4,674k +15.49 1.Rb1
37/66+ 02:17 641,931k 4,684k +15.59 1.Rb1
37/66+ 02:21 663,004k 4,690k +15.73 1.Rb1
37/66+ 02:36 740,009k 4,721k +15.92 1.Rb1
37/66+ 02:47 794,644k 4,733k +16.19 1.Rb1
37/66 02:51 814,132k 4,739k +16.05 1.Rb1 Bd6+ 2.Kh1 Qxb1 3.gxf7 Qd1 4.f8Q Bxf8 5.Rf4 Bc5 6.Qe4+ Kd2+ 7.Kg2 Qg1+ 8.Kh3 Qc1 9.Qd5+ Ke2 10.Rc4 Qf1+ 11.Kg4 Qg1+ 12.Kf5 Qb1+ 13.Ke6 Bf2 14.Kf7 Qb2 15.Qe4+ Kf1 16.Qh1+ Ke2 17.Re4+ Kd2 18.Qf3 Qb7+ 19.Kg6 Qa6+ 20.Kxg7 Bc5 21.g6 Qd3 22.Qxd3+ Kxd3 23.Rg4 Ke2 24.Kxh6 Kf3 25.Rc4 Bd6
So U could have used lc0 and not stockfish not often ?
Always Expect the Unexpected

Vinvin
Posts: 4373
Joined: Thu Mar 09, 2006 8:40 am
Full name: Vincent Lejeune

Re: SF Dev need 150s (2.5 min) to find Qh6

Post by Vinvin » Wed May 22, 2019 8:45 pm

Around 15 seconds (6*4GHz) for McCain-X3 to find Qh6!!

Code: Select all

McCain-X3_x64_modern:
Found 511 tablebases
...
 32/15	00:08	 86 973 812	9 737 327	 0,00	1.Kb7 f6 2.Qc6+ Kf7 3.Qxd5+ Kxg7 4.exf6+ Kh8 5.Qxg8+ Kxg8 6.fxe7 Kf7 7.Kxb8 Kxe7
 33/30+	00:14	 142 674 364	9 984 210	+0,04	1.Qh6
 33/30+	00:14	 144 743 091	9 992 619	+0,09	1.Qh6
 33/38+	00:14	 145 706 846	9 997 725	+0,28	1.Qh6
 33/53	00:15	 151 602 330	9 998 834	 0,00	1.Qh6 b5 2.Kb7 f6 3.e6 Qxe6 4.Qxh7 Qd7+ 5.Kxb8 Qd6+ 6.Kb7 Qd7+ 7.Kb6 Qd6+ 8.Kxb5 Qb8+ 9.Ka5 Qc7+ 10.Kb4 Qb6+ 11.Kc3 Qa5+ 12.Kb2 Qd2+ 13.Kb1 Qe1+ 14.Kc2 Qf2+ 15.Kc3 Qe1+ 16.Kc2
 34/32+	00:16	 162 341 147	9 983 466	+0,04	1.Qh6
 34/32+	00:16	 162 731 704	9 984 765	+0,07	1.Qh6
 34/55+	00:18	 186 733 451	10 064 865	+1,48	1.Qh6
 34/55	00:19	 191 653 787	10 081 204	+1,59	1.Qh6 b5 2.b4 e6 3.Qf6 h5 4.Qh6 f5 5.Qxh5+ Ke7 6.Qg5+ Ke8 7.Qg6+ Kd8 8.Qf6+ Ke8 9.Kb7 f4 10.Kxb8 f3 11.Qxf3 Qxg7 12.Qc3 Qg4 13.Qc6+ Ke7 14.Qc5+ Kd8 15.Qf8+ Kd7 16.Qd6+ Ke8 17.Kc7 Kf7 18.Kd7 Qxd4 19.Qxe6+ Kg7 20.Qf6+ Kg8 21.Qg5+ Kf8 22.e6 Qe4 23.Qf6+ Kg8
 35/42+	00:21	 219 487 067	10 131 886	+1,73	1.Qh6
 35/50+	00:22	 233 294 880	10 148 992	+1,88	1.Qh6
 35/52+	00:25	 261 806 259	10 196 536	+3,10	1.Qh6
 35/58	00:26	 269 318 225	10 206 087	+3,09	1.Qh6 e6 2.Qf6 h6 3.Qxh6 f5 4.Qg6+ Ke7 5.Qf6+ Ke8 6.Kb7 f4 7.Kxb8 f3 8.Qxf3 Qxg7 9.Qc3 Qg4 10.Kc7 Qg8 11.Kxb6 Kf7 12.Kb7 Qe8 13.Qf3+ Kg8 14.Qg4+ Kh7 15.Qh4+ Kg6 16.Qf6+ Kh5 17.Kc7 Kg4 18.Kd6 Qb8+ 19.Kxe6 Kh3 20.Qf3+ Kh4 21.Qxd5 Kg3 22.Kd7 Qa7+ 23.Kd6 Qb6+ 24.Ke7 Kf2 25.e6 Qc7+ 26.Kf6
 36/58	00:28	 294 063 214	10 252 535	+3,09	1.Qh6 e6 2.Qf6 h6 3.Qxh6 f5 4.Qg6+ Ke7 5.Qf6+ Ke8 6.Kb7 f4 7.Kxb8 f3 8.Qxf3 Qxg7 9.Qc3 Qg4 10.Kc7 Qg8 11.Kxb6 Kf7 12.Kb7 Qe8 13.Qf3+ Kg8 14.Qg4+ Kh7 15.Qh4+ Kg6 16.Qf6+ Kh5 17.Kc7 Kg4 18.Kd6 Qb8+ 19.Kxe6 Kh3 20.Qf3+ Kh4 21.Qxd5 Kg3 22.Kd7 Qa7+ 23.Kd6 Qb6+ 24.Ke7 Kf2 25.e6 Qc7+ 26.Kf6

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