Some fun positions from my collection

Rebel · Post by **Rebel** » Mon Sep 13, 2021 9:10 pm

Position 1

[fen]2n5/kP6/8/K7/4B3/8/8/8 w - -[/fen]
There are not so many engines that find the only good move instantly.

Jouni · Post by **Jouni** » Mon Sep 13, 2021 9:33 pm

Lc0 has no output after 10 minutes. Analysis by Lc0 v0.27.0 69626:

(nothing)

Rebel · Post by **Rebel** » Mon Sep 13, 2021 9:55 pm

That's odd, my Lc0-v28 [609992.pb] finds the good move instantly.

amanjpro · Post by **amanjpro** » Mon Sep 13, 2021 10:14 pm

Zahak needed quiet sometime to find the mate:

Code: Select all

position fen 2n5/kP6/8/K7/4B3/8/8/8 w - - 0 1
go infinite
info depth 1 seldepth 1 hashfull 0 nodes 48 nps 704897 score cp 1527 time 0 pv b7c8q
info depth 2 seldepth 2 hashfull 0 nodes 253 nps 1054592 score cp 813 time 0 pv b7c8b a7b8
info depth 3 seldepth 3 hashfull 0 nodes 920 nps 1484261 score cp 812 time 0 pv b7c8b a7b8 c8d7
info depth 4 seldepth 4 hashfull 0 nodes 981 nps 1484802 score cp 752 time 0 pv b7c8b a7b8 c8d7 b8c7
info depth 5 seldepth 6 hashfull 0 nodes 1881 nps 1150576 score cp 692 time 1 pv b7c8n a7b8 c8d6 b8c7 d6c4 c7d7
info depth 6 seldepth 6 hashfull 0 nodes 2220 nps 1095484 score cp 731 time 2 pv b7c8b a7b8 c8h3 b8c7 h3g4 c7d6
info depth 7 seldepth 5 hashfull 0 nodes 2323 nps 1106646 score cp 738 time 2 pv b7c8b a7b8 c8e6 b8c7 e6a2
info depth 8 seldepth 5 hashfull 0 nodes 2587 nps 1156098 score cp 760 time 2 pv b7c8b a7b8 c8g4 b8c7 a5b4
info depth 9 seldepth 8 hashfull 0 nodes 3448 nps 1318522 score cp 777 time 2 pv b7c8b a7b8 c8g4 b8c7 a5b5 c7d6 b5b6 d6e5
info depth 10 seldepth 10 hashfull 0 nodes 7460 nps 1749965 score cp 771 time 4 pv b7c8b a7b8 c8a6 b8c7 a6d3 c7d6 a5b6 d6e5 b6c7 e5d4
info depth 11 seldepth 10 hashfull 0 nodes 10616 nps 1923746 score cp 779 time 5 pv b7c8b a7b8 c8e6 b8c7 e6d5 c7d6 a5b6 d6e5 b6c7 e5d4
info depth 12 seldepth 12 hashfull 0 nodes 18070 nps 2067882 score cp 771 time 8 pv b7c8b a7b8 c8g4 b8c7 g4f5 c7d6 a5b6 d6e5 b6c7 e5d4 c7d6 d4e3
info depth 13 seldepth 12 hashfull 0 nodes 19369 nps 2076358 score cp 771 time 9 pv b7c8b a7b8 c8g4 b8c7 g4f5 c7d6 a5b6 d6e5 b6c7 e5d4 c7d6 d4e3
info depth 14 seldepth 14 hashfull 0 nodes 27122 nps 2140088 score cp 796 time 12 pv b7c8b a7b8 c8g4 b8c7 g4f5 c7d6 a5b6 d6e5 b6c5 e5f4 c5d6 f4e3 e4d5 e3f2
info depth 15 seldepth 16 hashfull 1 nodes 113799 nps 2285683 score cp 796 time 49 pv b7c8b a7b8 c8e6 b8c7 a5b5 c7d6 e6d5 d6e5 b5c5 e5f4 c5d6 f4e3 e4g6 e3e2 g6f5 e2f2
info depth 16 seldepth 18 hashfull 1 nodes 170654 nps 2353371 score cp 790 time 72 pv b7c8b a7b8 c8e6 b8c7 a5b5 c7d6 e6d5 d6e5 b5c5 e5f4 c5d6 f4e3 e4g6 e3f2 g6d3 f2e3 d3b5 e3f2
info depth 17 seldepth 19 hashfull 2 nodes 272510 nps 2449385 score cp 794 time 111 pv b7c8b a7b8 c8e6 b8c7 a5b5 c7d6 e6d5 d6e5 b5c5 e5f4 c5d6 f4e3 e4g6 e3f2 d6c7 f2e2 g6f5 e2e3 c7d6
info depth 18 seldepth 20 hashfull 4 nodes 524830 nps 2538152 score cp 790 time 206 pv b7c8b a7b8 c8e6 b8c7 a5b5 c7d6 e6d5 d6e5 b5c5 e5f4 c5d6 f4e3 e4g6 e3d4 g6f5 d4e3 f5d7 e3e2 d6c7 e2d3
info depth 19 seldepth 20 hashfull 4 nodes 566362 nps 2538404 score cp 815 time 223 pv b7c8b a7b8 c8e6 b8c7 a5b5 c7d6 e6f5 d6e5 b5c5 e5f4 c5d4 f4g3 d4e3 g3h4 e3f4 h4h5 e4d5 h5h6 f4e5 h6g5
info depth 20 seldepth 23 hashfull 7 nodes 779766 nps 2504734 score cp 828 time 311 pv b7c8b a7b8 c8e6 b8c7 a5b5 c7d6 e6f5 d6e5 b5c5 e5f4 c5d4 f4g3 d4e3 g3h2 e4d5 h2g3 f5d7 g3h4 e3f4 h4h5 f4f5 h5h4 f5f6
info depth 21 seldepth 27 hashfull 15 nodes 1499698 nps 2503139 score cp 835 time 599 pv b7c8b a7b8 c8e6 b8c7 a5b5 c7d6 e6f5 d6e5 b5c5 e5f4 c5d4 f4g3 d4e3 g3h4 e3f4 h4h5 e4d5 h5h4 f5d7 h4h5 f4e5 h5g6 d7f5 g6g5 d5c4 g5h5 e5d6
info depth 22 seldepth 23 hashfull 32 nodes 3873028 nps 2566210 score cp 835 time 1509 pv b7c8b a7b8 c8e6 b8c7 a5b5 c7d6 e6f5 d6e5 b5c5 e5f4 c5d4 f4g5 d4e5 g5h5 e5f4 h5h6 e4d5 h6h5 f4e5 h5g5 d5c4 g5h5 e5d6
info depth 23 seldepth 27 hashfull 35 nodes 4336240 nps 2573653 score cp 837 time 1684 pv b7c8b a7b8 c8e6 b8c7 a5b5 c7d6 e6f5 d6e5 b5c5 e5f4 c5d4 f4g5 d4e5 g5h5 e5f4 h5h6 e4d5 h6h5 d5f3 h5h6 f5d3 h6g7 f4e5 g7f7 d3f5 f7e8 e5d6
info depth 24 seldepth 25 hashfull 49 nodes 6356590 nps 2564557 score cp 837 time 2478 pv b7c8b a7b8 c8e6 b8c7 a5b5 c7d6 e6f5 d6e5 b5c5 e5f4 c5d4 f4g5 d4e5 g5h5 e5f4 h5h4 f5e6 h4h5 e4f5 h5h6 f5d3 h6h5 e6d5 h5h4 f4e5
info depth 25 seldepth 26 hashfull 84 nodes 14198181 nps 2502577 score cp 820 time 5673 pv b7c8b a7b8 c8e6 b8c7 a5b5 c7d6 e6f5 d6e5 b5c5 e5f4 c5d4 f4g5 d4e5 g5h5 e5f4 h5h4 f5e6 h4h5 e6d7 h5h6 f4e5 h6g5 e4d5 g5g6 e5d6 g6f6
info depth 26 seldepth 28 hashfull 86 nodes 14658449 nps 2500517 score cp 823 time 5862 pv b7c8b a7b8 c8e6 b8c7 a5b5 c7d6 e6f5 d6e5 b5c5 e5f4 c5d4 f4g5 d4e5 g5h5 e5f4 h5h4 f5e6 h4h5 e4f5 h5h6 f4e5 h6g5 f5d3 g5h4 e5f4 h4h5 e6d5 h5h6
info depth 27 seldepth 29 hashfull 107 nodes 17228849 nps 2480765 score cp 835 time 6944 pv b7c8b a7b8 c8e6 b8c7 a5b5 c7d6 e6f5 d6e5 b5c5 e5f4 c5d4 f4g5 d4e5 g5h5 e5f4 h5h4 f5e6 h4h5 e4f5 h5h6 e6d5 h6h5 f5d3 h5h4 d3f1 h4h5 f1b5 h5h4 f4e5
info depth 28 seldepth 31 hashfull 175 nodes 30035944 nps 2421466 score cp 823 time 12404 pv b7c8b a7b8 c8e6 b8c7 a5b5 c7d6 e6f5 d6e5 b5c5 e5f4 c5d4 f4g5 d4e5 g5h5 e5f4 h5h4 f5e6 h4h5 e4f5 h5h4 f5h3 h4h5 h3g4 h5h4 g4f5 h4h5 e6d5 h5h6 f4g4 h6g7 g4g5
info depth 29 seldepth 31 hashfull 177 nodes 30842304 nps 2422793 score cp 830 time 12730 pv b7c8b a7b8 c8e6 b8c7 a5b5 c7d6 e6f5 d6e5 b5c5 e5f4 c5d4 f4g5 d4e5 g5h6 e4f3 h6g5 f3d5 g5h5 e5f4 h5h4 d5e4 h4h5 e4f3 h5h4 f3d5 h4h5 f5e4 h5h4 e4d3 h4h3 f4e5
info depth 30 seldepth 33 hashfull 240 nodes 42232254 nps 2403326 score cp 825 time 17572 pv b7c8b a7b8 c8e6 b8c7 a5b5 c7d6 e6f5 d6e5 b5c5 e5f4 c5d4 f4g5 d4e5 g5h6 e5f4 h6h5 f5e6 h5h4 e6c8 h4h5 e4f3 h5h4 f4e3 h4g5 e3d4 g5g6 d4e5 g6g7 c8f5 g7f7 f3e4 f7f8 e5d6
info depth 31 seldepth 31 hashfull 254 nodes 48759266 nps 2394733 score cp 835 time 20361 pv b7c8b a7b8 c8e6 b8c7 a5b5 c7d6 e4f5 d6e5 f5h3 e5f4 b5c5 f4g3 c5d4 g3h4 h3g4 h4g5 d4e5 g5g6 e5f4 g6g7 e6d5 g7g6 f4e4 g6g7 e4d4 g7f8 g4h3 f8g7 d4e5 g7h6 h3f5
info depth 32 seldepth 33 hashfull 387 nodes 78661636 nps 2375737 score cp 833 time 33110 pv b7c8b a7b8 c8e6 b8c7 a5b5 c7d6 e4d5 d6e7 b5c5 e7f6 c5d4 f6g6 d4e4 g6g5 e4f3 g5h5 f3g3 h5g5 e6g4 g5h6 g3f4 h6g6 d5e4 g6f6 e4f5 f6e7 f4e5 e7f8 f5e4 f8f7 g4f5 f7f8 e4d5
info depth 33 seldepth 33 hashfull 462 nodes 135078846 nps 2300947 score cp 831 time 58705 pv b7c8b a7b8 c8e6 b8c7 e4d5 c7d8 d5c4 d8e8 a5b5 e8e7 b5c5 e7f6 e6c8 f6e5 c4d5 e5f6 c5d4 f6g6 d4e3 g6g5 c8e6 g5g6 e3f4 g6h5 e6f5 h5h4 f4e3 h4g3 d5g8 g3g2 e3f4 g2g1 g8d5
info depth 34 seldepth 36 hashfull 471 nodes 150877686 nps 2304782 score cp 843 time 65462 pv b7c8b a7b8 c8e6 b8c7 e4d5 c7d8 a5b4 d8e7 b4c5 e7f6 c5d6 f6g5 d6e5 g5h4 e5f4 h4h5 e6g4 h5h4 g4f5 h4h5 f4g3 h5g5 d5e4 g5h5 e4g2 h5g5 f5g4 g5f6 g3f4 f6e7 f4e5 e7f8 g2d5 f8g7 g4f5 g7f8
info depth 35 seldepth 38 hashfull 512 nodes 174607813 nps 2295258 score cp 853 time 76073 pv b7c8n a7b8 c8d6 b8c7 d6f5 c7d7 e4d5 d7e8 a5b6 e8f8 b6c7 f8e8 c7c6 e8f8 c6d6 f8e8 d6e6 e8f8 d5c6 f8g8 e6e7 g8h7 c6e8 h7g8 e8f7 g8h7 f7h5 h7g8 e7e6 g8h8 e6f7 h8h7 h5e2 h7h8 e2g4 h8h7 g4f3 h7h8
info depth 36 seldepth 40 hashfull 533 nodes 190390038 nps 2288433 score cp 859 time 83196 pv b7c8n a7b8 c8d6 b8c7 d6f5 c7d7 e4d5 d7e8 a5b6 e8f8 b6c7 f8e8 c7c6 e8f8 c6d6 f8e8 d6e6 e8f8 d5c6 f8g8 e6e7 g8h7 c6e8 h7g8 e8f7 g8h7 f7h5 h7g8 h5e8 g8h7 e7f7 h7h8 e8d7 h8h7 d7b5 h7h8 b5c6 h8h7 c6d5 h7h8
info depth 37 seldepth 17 hashfull 586 nodes 270009288 nps 2268408 score cp 821 time 119030 pv b7c8n a7b8 c8d6 b8c7 d6f5 c7d7 e4d5 d7c7 d5f7 c7b8 f7e6 b8c7 a5b4 c7b7 e6b3 b7a8 b4c5
info depth 38 seldepth 23 hashfull 587 nodes 287380396 nps 2248316 score mate +11 time 127820 pv b7c8n a7b8 c8d6 b8c7 d6f5 c7d7 e4d5 d7c7 a5b5 c7b8 b5b6 b8c8 d5c6 c8b8 c6d7 b8a8 f5e7 a8b8 d7c8 b8a8 c8b7 a8b8 e7c6
info depth 38 seldepth 23 hashfull 587 nodes 287380396 nps 2248315 score mate +11 time 127820 pv b7c8n a7b8 c8d6 b8c7 d6f5 c7d7 e4d5 d7c7 a5b5 c7b8 b5b6 b8c8 d5c6 c8b8 c6d7 b8a8 f5e7 a8b8 d7c8 b8a8 c8b7 a8b8 e7c6
bestmove b7c8n ponder a7b8

Rebel · Post by **Rebel** » Mon Sep 13, 2021 11:03 pm

amanjpro wrote: ↑Mon Sep 13, 2021 10:14 pm Zahak needed quiet sometime to find the mate:

Code: Select all

position fen 2n5/kP6/8/K7/4B3/8/8/8 w - - 0 1
go infinite
info depth 1 seldepth 1 hashfull 0 nodes 48 nps 704897 score cp 1527 time 0 pv b7c8q
info depth 2 seldepth 2 hashfull 0 nodes 253 nps 1054592 score cp 813 time 0 pv b7c8b a7b8
info depth 3 seldepth 3 hashfull 0 nodes 920 nps 1484261 score cp 812 time 0 pv b7c8b a7b8 c8d7
info depth 4 seldepth 4 hashfull 0 nodes 981 nps 1484802 score cp 752 time 0 pv b7c8b a7b8 c8d7 b8c7
info depth 5 seldepth 6 hashfull 0 nodes 1881 nps 1150576 score cp 692 time 1 pv b7c8n a7b8 c8d6 b8c7 d6c4 c7d7
info depth 6 seldepth 6 hashfull 0 nodes 2220 nps 1095484 score cp 731 time 2 pv b7c8b a7b8 c8h3 b8c7 h3g4 c7d6
info depth 7 seldepth 5 hashfull 0 nodes 2323 nps 1106646 score cp 738 time 2 pv b7c8b a7b8 c8e6 b8c7 e6a2
info depth 8 seldepth 5 hashfull 0 nodes 2587 nps 1156098 score cp 760 time 2 pv b7c8b a7b8 c8g4 b8c7 a5b4
info depth 9 seldepth 8 hashfull 0 nodes 3448 nps 1318522 score cp 777 time 2 pv b7c8b a7b8 c8g4 b8c7 a5b5 c7d6 b5b6 d6e5
info depth 10 seldepth 10 hashfull 0 nodes 7460 nps 1749965 score cp 771 time 4 pv b7c8b a7b8 c8a6 b8c7 a6d3 c7d6 a5b6 d6e5 b6c7 e5d4
info depth 11 seldepth 10 hashfull 0 nodes 10616 nps 1923746 score cp 779 time 5 pv b7c8b a7b8 c8e6 b8c7 e6d5 c7d6 a5b6 d6e5 b6c7 e5d4
info depth 12 seldepth 12 hashfull 0 nodes 18070 nps 2067882 score cp 771 time 8 pv b7c8b a7b8 c8g4 b8c7 g4f5 c7d6 a5b6 d6e5 b6c7 e5d4 c7d6 d4e3
info depth 13 seldepth 12 hashfull 0 nodes 19369 nps 2076358 score cp 771 time 9 pv b7c8b a7b8 c8g4 b8c7 g4f5 c7d6 a5b6 d6e5 b6c7 e5d4 c7d6 d4e3
info depth 14 seldepth 14 hashfull 0 nodes 27122 nps 2140088 score cp 796 time 12 pv b7c8b a7b8 c8g4 b8c7 g4f5 c7d6 a5b6 d6e5 b6c5 e5f4 c5d6 f4e3 e4d5 e3f2
info depth 15 seldepth 16 hashfull 1 nodes 113799 nps 2285683 score cp 796 time 49 pv b7c8b a7b8 c8e6 b8c7 a5b5 c7d6 e6d5 d6e5 b5c5 e5f4 c5d6 f4e3 e4g6 e3e2 g6f5 e2f2
info depth 16 seldepth 18 hashfull 1 nodes 170654 nps 2353371 score cp 790 time 72 pv b7c8b a7b8 c8e6 b8c7 a5b5 c7d6 e6d5 d6e5 b5c5 e5f4 c5d6 f4e3 e4g6 e3f2 g6d3 f2e3 d3b5 e3f2
info depth 17 seldepth 19 hashfull 2 nodes 272510 nps 2449385 score cp 794 time 111 pv b7c8b a7b8 c8e6 b8c7 a5b5 c7d6 e6d5 d6e5 b5c5 e5f4 c5d6 f4e3 e4g6 e3f2 d6c7 f2e2 g6f5 e2e3 c7d6
info depth 18 seldepth 20 hashfull 4 nodes 524830 nps 2538152 score cp 790 time 206 pv b7c8b a7b8 c8e6 b8c7 a5b5 c7d6 e6d5 d6e5 b5c5 e5f4 c5d6 f4e3 e4g6 e3d4 g6f5 d4e3 f5d7 e3e2 d6c7 e2d3
info depth 19 seldepth 20 hashfull 4 nodes 566362 nps 2538404 score cp 815 time 223 pv b7c8b a7b8 c8e6 b8c7 a5b5 c7d6 e6f5 d6e5 b5c5 e5f4 c5d4 f4g3 d4e3 g3h4 e3f4 h4h5 e4d5 h5h6 f4e5 h6g5
info depth 20 seldepth 23 hashfull 7 nodes 779766 nps 2504734 score cp 828 time 311 pv b7c8b a7b8 c8e6 b8c7 a5b5 c7d6 e6f5 d6e5 b5c5 e5f4 c5d4 f4g3 d4e3 g3h2 e4d5 h2g3 f5d7 g3h4 e3f4 h4h5 f4f5 h5h4 f5f6
info depth 21 seldepth 27 hashfull 15 nodes 1499698 nps 2503139 score cp 835 time 599 pv b7c8b a7b8 c8e6 b8c7 a5b5 c7d6 e6f5 d6e5 b5c5 e5f4 c5d4 f4g3 d4e3 g3h4 e3f4 h4h5 e4d5 h5h4 f5d7 h4h5 f4e5 h5g6 d7f5 g6g5 d5c4 g5h5 e5d6
info depth 22 seldepth 23 hashfull 32 nodes 3873028 nps 2566210 score cp 835 time 1509 pv b7c8b a7b8 c8e6 b8c7 a5b5 c7d6 e6f5 d6e5 b5c5 e5f4 c5d4 f4g5 d4e5 g5h5 e5f4 h5h6 e4d5 h6h5 f4e5 h5g5 d5c4 g5h5 e5d6
info depth 23 seldepth 27 hashfull 35 nodes 4336240 nps 2573653 score cp 837 time 1684 pv b7c8b a7b8 c8e6 b8c7 a5b5 c7d6 e6f5 d6e5 b5c5 e5f4 c5d4 f4g5 d4e5 g5h5 e5f4 h5h6 e4d5 h6h5 d5f3 h5h6 f5d3 h6g7 f4e5 g7f7 d3f5 f7e8 e5d6
info depth 24 seldepth 25 hashfull 49 nodes 6356590 nps 2564557 score cp 837 time 2478 pv b7c8b a7b8 c8e6 b8c7 a5b5 c7d6 e6f5 d6e5 b5c5 e5f4 c5d4 f4g5 d4e5 g5h5 e5f4 h5h4 f5e6 h4h5 e4f5 h5h6 f5d3 h6h5 e6d5 h5h4 f4e5
info depth 25 seldepth 26 hashfull 84 nodes 14198181 nps 2502577 score cp 820 time 5673 pv b7c8b a7b8 c8e6 b8c7 a5b5 c7d6 e6f5 d6e5 b5c5 e5f4 c5d4 f4g5 d4e5 g5h5 e5f4 h5h4 f5e6 h4h5 e6d7 h5h6 f4e5 h6g5 e4d5 g5g6 e5d6 g6f6
info depth 26 seldepth 28 hashfull 86 nodes 14658449 nps 2500517 score cp 823 time 5862 pv b7c8b a7b8 c8e6 b8c7 a5b5 c7d6 e6f5 d6e5 b5c5 e5f4 c5d4 f4g5 d4e5 g5h5 e5f4 h5h4 f5e6 h4h5 e4f5 h5h6 f4e5 h6g5 f5d3 g5h4 e5f4 h4h5 e6d5 h5h6
info depth 27 seldepth 29 hashfull 107 nodes 17228849 nps 2480765 score cp 835 time 6944 pv b7c8b a7b8 c8e6 b8c7 a5b5 c7d6 e6f5 d6e5 b5c5 e5f4 c5d4 f4g5 d4e5 g5h5 e5f4 h5h4 f5e6 h4h5 e4f5 h5h6 e6d5 h6h5 f5d3 h5h4 d3f1 h4h5 f1b5 h5h4 f4e5
info depth 28 seldepth 31 hashfull 175 nodes 30035944 nps 2421466 score cp 823 time 12404 pv b7c8b a7b8 c8e6 b8c7 a5b5 c7d6 e6f5 d6e5 b5c5 e5f4 c5d4 f4g5 d4e5 g5h5 e5f4 h5h4 f5e6 h4h5 e4f5 h5h4 f5h3 h4h5 h3g4 h5h4 g4f5 h4h5 e6d5 h5h6 f4g4 h6g7 g4g5
info depth 29 seldepth 31 hashfull 177 nodes 30842304 nps 2422793 score cp 830 time 12730 pv b7c8b a7b8 c8e6 b8c7 a5b5 c7d6 e6f5 d6e5 b5c5 e5f4 c5d4 f4g5 d4e5 g5h6 e4f3 h6g5 f3d5 g5h5 e5f4 h5h4 d5e4 h4h5 e4f3 h5h4 f3d5 h4h5 f5e4 h5h4 e4d3 h4h3 f4e5
info depth 30 seldepth 33 hashfull 240 nodes 42232254 nps 2403326 score cp 825 time 17572 pv b7c8b a7b8 c8e6 b8c7 a5b5 c7d6 e6f5 d6e5 b5c5 e5f4 c5d4 f4g5 d4e5 g5h6 e5f4 h6h5 f5e6 h5h4 e6c8 h4h5 e4f3 h5h4 f4e3 h4g5 e3d4 g5g6 d4e5 g6g7 c8f5 g7f7 f3e4 f7f8 e5d6
info depth 31 seldepth 31 hashfull 254 nodes 48759266 nps 2394733 score cp 835 time 20361 pv b7c8b a7b8 c8e6 b8c7 a5b5 c7d6 e4f5 d6e5 f5h3 e5f4 b5c5 f4g3 c5d4 g3h4 h3g4 h4g5 d4e5 g5g6 e5f4 g6g7 e6d5 g7g6 f4e4 g6g7 e4d4 g7f8 g4h3 f8g7 d4e5 g7h6 h3f5
info depth 32 seldepth 33 hashfull 387 nodes 78661636 nps 2375737 score cp 833 time 33110 pv b7c8b a7b8 c8e6 b8c7 a5b5 c7d6 e4d5 d6e7 b5c5 e7f6 c5d4 f6g6 d4e4 g6g5 e4f3 g5h5 f3g3 h5g5 e6g4 g5h6 g3f4 h6g6 d5e4 g6f6 e4f5 f6e7 f4e5 e7f8 f5e4 f8f7 g4f5 f7f8 e4d5
info depth 33 seldepth 33 hashfull 462 nodes 135078846 nps 2300947 score cp 831 time 58705 pv b7c8b a7b8 c8e6 b8c7 e4d5 c7d8 d5c4 d8e8 a5b5 e8e7 b5c5 e7f6 e6c8 f6e5 c4d5 e5f6 c5d4 f6g6 d4e3 g6g5 c8e6 g5g6 e3f4 g6h5 e6f5 h5h4 f4e3 h4g3 d5g8 g3g2 e3f4 g2g1 g8d5
info depth 34 seldepth 36 hashfull 471 nodes 150877686 nps 2304782 score cp 843 time 65462 pv b7c8b a7b8 c8e6 b8c7 e4d5 c7d8 a5b4 d8e7 b4c5 e7f6 c5d6 f6g5 d6e5 g5h4 e5f4 h4h5 e6g4 h5h4 g4f5 h4h5 f4g3 h5g5 d5e4 g5h5 e4g2 h5g5 f5g4 g5f6 g3f4 f6e7 f4e5 e7f8 g2d5 f8g7 g4f5 g7f8
info depth 35 seldepth 38 hashfull 512 nodes 174607813 nps 2295258 score cp 853 time 76073 pv b7c8n a7b8 c8d6 b8c7 d6f5 c7d7 e4d5 d7e8 a5b6 e8f8 b6c7 f8e8 c7c6 e8f8 c6d6 f8e8 d6e6 e8f8 d5c6 f8g8 e6e7 g8h7 c6e8 h7g8 e8f7 g8h7 f7h5 h7g8 e7e6 g8h8 e6f7 h8h7 h5e2 h7h8 e2g4 h8h7 g4f3 h7h8
info depth 36 seldepth 40 hashfull 533 nodes 190390038 nps 2288433 score cp 859 time 83196 pv b7c8n a7b8 c8d6 b8c7 d6f5 c7d7 e4d5 d7e8 a5b6 e8f8 b6c7 f8e8 c7c6 e8f8 c6d6 f8e8 d6e6 e8f8 d5c6 f8g8 e6e7 g8h7 c6e8 h7g8 e8f7 g8h7 f7h5 h7g8 h5e8 g8h7 e7f7 h7h8 e8d7 h8h7 d7b5 h7h8 b5c6 h8h7 c6d5 h7h8
info depth 37 seldepth 17 hashfull 586 nodes 270009288 nps 2268408 score cp 821 time 119030 pv b7c8n a7b8 c8d6 b8c7 d6f5 c7d7 e4d5 d7c7 d5f7 c7b8 f7e6 b8c7 a5b4 c7b7 e6b3 b7a8 b4c5
info depth 38 seldepth 23 hashfull 587 nodes 287380396 nps 2248316 score mate +11 time 127820 pv b7c8n a7b8 c8d6 b8c7 d6f5 c7d7 e4d5 d7c7 a5b5 c7b8 b5b6 b8c8 d5c6 c8b8 c6d7 b8a8 f5e7 a8b8 d7c8 b8a8 c8b7 a8b8 e7c6
info depth 38 seldepth 23 hashfull 587 nodes 287380396 nps 2248315 score mate +11 time 127820 pv b7c8n a7b8 c8d6 b8c7 d6f5 c7d7 e4d5 d7c7 a5b5 c7b8 b5b6 b8c8 d5c6 c8b8 c6d7 b8a8 f5e7 a8b8 d7c8 b8a8 c8b7 a8b8 e7c6
bestmove b7c8n ponder a7b8

Quite so. The key of the position is that 2 bishops of the same color are worthless and thus a draw. Not many engines have the knowledge inside.

Rebel · Post by **Rebel** » Mon Sep 13, 2021 11:07 pm

Position 2

[fen]4K3/PPPPPPPP/8/8/8/8/pppppppp/4k3 w - -[/fen]
Level : depth=1

There are engines that don't finish depth 1 within one minute.

amanjpro · Post by **amanjpro** » Mon Sep 13, 2021 11:19 pm

Rebel wrote: ↑Mon Sep 13, 2021 11:07 pm Position 2

[fen]4K3/PPPPPPPP/8/8/8/8/pppppppp/4k3 w - -[/fen]
Level : depth=1

There are engines that don't finish depth 1 within one minute.

Zahak hanged forever, probably because I do promotions in QS search

JVMerlino · Post by **JVMerlino** » Mon Sep 13, 2021 11:20 pm

Rebel wrote: ↑Mon Sep 13, 2021 9:10 pm Position 1

[fen]2n5/kP6/8/K7/4B3/8/8/8 w - -[/fen]
There are not so many engines that find the only good move instantly.

Myrddin finds bxc8N at depth 2, but doesn't announce mate after 2 minutes.

JVMerlino · Post by **JVMerlino** » Mon Sep 13, 2021 11:26 pm

Rebel wrote: ↑Mon Sep 13, 2021 11:07 pm Position 2

[fen]4K3/PPPPPPPP/8/8/8/8/pppppppp/4k3 w - -[/fen]
Level : depth=1

There are engines that don't finish depth 1 within one minute.

Myrddin at one core does indeed need 1 minute 47 seconds to print its first PV.

Rebel · Post by **Rebel** » Mon Sep 13, 2021 11:35 pm

JVMerlino wrote: ↑Mon Sep 13, 2021 11:26 pm
Rebel wrote: ↑Mon Sep 13, 2021 11:07 pm Position 2

[fen]4K3/PPPPPPPP/8/8/8/8/pppppppp/4k3 w - -[/fen]
Level : depth=1

There are engines that don't finish depth 1 within one minute.
Myrddin at one core does indeed need 1 minute 47 seconds to print its first PV.

QS explosion. At the time I fixed it, elo progress : 0,000001

Some fun positions from my collection

Some fun positions from my collection

Re: Some fun positions from my collection

Re: Some fun positions from my collection

Re: Some fun positions from my collection

Re: Some fun positions from my collection

Re: Some fun positions from my collection

Re: Some fun positions from my collection

Re: Some fun positions from my collection

Re: Some fun positions from my collection

Re: Some fun positions from my collection