Complex Puzzle

[Nordlandia]

Possible cook

Code: Select all

5K2/k7/4RP2/3q3p/5p1P/7P/8/8 w - - 0 0

------------

P. Krug | Price | White wins

[d]n6Q/1pp5/1P3N1p/2P5/pK4p1/8/1k6/2q5 w - - 0 0

[Nordlandia]

Stockfish is questionable about this one, possible fortress salvage for black

[Nordlandia]

Fortress salvage

[d]3k4/1p6/p1bK4/p4Q2/1p6/8/PP6/4r3 w - - 0 0

[Nordlandia]

Possible 8-man cook detected

KRNN vs KRNP can in theory be winning

Code: Select all

8/5n2/8/2kB1P2/1RP1p3/2p5/1pK1N3/1n3r2 w - - 0 1

[pgn][Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "New game"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "8/5n2/8/2kB1P2/1RP1p3/2p5/1pK1N3/1n3r2 w - - 0 1"]
[PlyCount "18"]

1. Rb5+ Kd6 2. Rb6+ Ke5 3. Bxe4 Nd6 4. Bd3 Na3+ 5. Kxc3 b1=Q 6. Bxb1 Nxb1+ 7.
Kb4 Nd2 8. Nc3 Rh1 9. Rc6 Nxf5 *

[/pgn]

[Nordlandia]

Stockfish is not certain about #18905

[d]r3k3/r2p1p2/2Pp1P2/np4p1/p1n3K1/4P3/2PQ2R1/6R1 w q - 0 0

[MikeB]

Stockfish is not certain about #18905

[d]r3k3/r2p1p2/2Pp1P2/np4p1/p1n3K1/4P3/2PQ2R1/6R1 w q - 0 0

SF (McBrain) looks pretty certain here:

Code: Select all

 info depth 23 seldepth 47 multipv 1 score cp -49 nodes 280379728 nps 18023896 hashfull 251 tbhits 6444 time 15556 pv c6d7 e8d7 d2e2 a8e8 g2g3 d7c6 g4h3 a5b7 h3h2 b7c5 g3g5 a4a3 e2g2 c5e4 g5g8 a7a8 g8e8 a8e8 g2g7 c4e5 g1a1 e8a8 g7h7 e4f6 h7f5 f6g4 h2g3 a3a2 f5e4 d6d5 e4d4 a8a3
 info depth 24 seldepth 47 multipv 1 score cp -42 nodes 292716058 nps 18070007 hashfull 263 tbhits 6718 time 16199 pv c6d7
 info depth 24 seldepth 47 multipv 1 score cp -49 nodes 296871286 nps 18080960 hashfull 269 tbhits 7381 time 16419 pv c6d7 e8d7
 info depth 24 seldepth 47 multipv 1 score cp -60 nodes 301930198 nps 18096991 hashfull 274 tbhits 7762 time 16684 pv c6d7 e8d7
 info depth 24 seldepth 47 multipv 1 score cp -75 nodes 319342997 nps 18155835 hashfull 286 tbhits 12385 time 17589 pv c6d7 e8d7
 info depth 24 seldepth 47 multipv 1 score cp -62 nodes 414254144 nps 18308766 hashfull 367 tbhits 18793 time 22626 pv c6c7
 info depth 24 seldepth 47 multipv 1 score cp -59 nodes 415180344 nps 18308433 hashfull 367 tbhits 18793 time 22677 pv c6c7 a7c7 d2b4 c7c5 g4f3 c4e5 f3f2 a5c6 g2g5 e8c8 b4b1 b5b4 g5g8 c5c4 g8d8 c8d8 g1d1 d8c7 b1a2 a4a3 f2e2 c4c3 a2b1 e5g4 d1d3 c3c5 d3b3 g4f6 c2c3 b4c3 b3a3 c3c2 b1c1 f6e4 e2f1
 info depth 25 seldepth 47 multipv 1 score cp -66 nodes 434441427 nps 18312317 hashfull 385 tbhits 19179 time 23724 pv c6c7 a7c7
 info depth 25 seldepth 47 multipv 1 score cp -74 nodes 435926873 nps 18310869 hashfull 387 tbhits 19199 time 23807 pv c6c7 a7c7
 info depth 25 seldepth 47 multipv 1 score cp -76 nodes 445296457 nps 18315912 hashfull 393 tbhits 19547 time 24312 pv c6c7 a7c7 d2b4 c7c5 g4f3 c4e5 f3e2 a5c6 g2g5 e8c8 b4b1 c8c7 g5g8 d8g8 g1g8 b5b4 b1a2 a4a3 g8g1 c5c3 g1d1 e5c4 d1d3 b4b3 c2b3 c3d3 b3c4 c6b4 a2b1 d3e3 e2e3 a3a2 b1b4
 info depth 26 seldepth 47 multipv 1 score cp -83 nodes 477845177 nps 18338457 hashfull 419 tbhits 23477 time 26057 pv c6c7 a7c7
 info depth 26 seldepth 47 multipv 1 score cp -76 nodes 513957168 nps 18383845 hashfull 449 tbhits 24309 time 27957 pv c6c7 a7c7 d2b4 c7c5 g4f3 c4e5 f3f2 a5c6 g2g5 e8c8 b4b1 b5b4 g5g8 d8g8 g1g8 c8c7 e3e4 c5c4 b1a2 a4a3 g8g3 c4e4 c2c3 e5c4 a2b3 d6d5 b3a4 e4f4 f2e1 b4c3 g3c3 f4f6 c3a3 c4a3 a4a3 f6g6 e1f2 d5d4
 info depth 27 seldepth 51 multipv 1 score cp -83 nodes 607951187 nps 18473705 hashfull 501 tbhits 30158 time 32909 pv c6c7 a7c7
 info depth 27 seldepth 55 multipv 1 score cp -76 nodes 631950652 nps 18492688 hashfull 518 tbhits 35292 time 34173 pv c6c7
 info depth 27 seldepth 55 multipv 1 score cp -81 nodes 682816858 nps 18514054 hashfull 555 tbhits 39960 time 36881 pv c6c7 a7c7 d2b4 c7c5 g4f3 c4e5 f3f2 a5c6 g2g5 e8c8 b4b1 b5b4 g5g8 d8g8 g1g8 c8c7 e3e4 a4a3 g8g3 c5c4 b1a2 c4e4 c2c3 e5c4 a2c2 d6d5 c2a4 e4f4 f2e1 b4b3 a4b3 f4f1 e1e2 f1f6 b3a4
 info depth 28 seldepth 55 multipv 1 score cp -74 nodes 819561526 nps 18594280 hashfull 638 tbhits 48782 time 44076 pv c6c7
 info depth 28 seldepth 55 multipv 1 score cp -66 nodes 868454708 nps 18642768 hashfull 664 tbhits 50887 time 46584 pv c6d7
 info depth 28 seldepth 55 multipv 1 score cp -56 nodes 880107313 nps 18647526 hashfull 668 tbhits 51144 time 47197 pv c6d7
 info depth 28 seldepth 55 multipv 1 score cp -40 nodes 934183621 nps 18707618 hashfull 695 tbhits 52886 time 49936 pv c6d7
 info depth 28 seldepth 55 multipv 1 score cp -20 nodes 1045594109 nps 18771213 hashfull 747 tbhits 58620 time 55702 pv c6d7
 info depth 28 seldepth 55 multipv 1 score cp -36 nodes 1129688365 nps 18804946 hashfull 778 tbhits 64800 time 60074 pv c6d7 e8d7
 info depth 28 seldepth 55 multipv 1 score cp -14 nodes 1250831923 nps 18852025 hashfull 812 tbhits 79730 time 66350 pv c6c7
 info depth 28 seldepth 55 multipv 1 score cp 0 nodes 1274407731 nps 18849675 hashfull 822 tbhits 81214 time 67609 pv c6c7 a7c7 d2d1 c4e3 g4g5 e3d1 g2e2 d1e3 e2e3 e8f8 g1h1 c7c5 g5f4 c5c4 f4f5 c4c5 f5f4
 info depth 29 seldepth 55 multipv 1 score cp -7 nodes 1343050956 nps 18897047 hashfull 838 tbhits 98522 time 71072 pv c6c7 a7c7
 info depth 29 seldepth 55 multipv 1 score cp -14 nodes 1374592586 nps 18922053 hashfull 850 tbhits 104670 time 72645 pv c6c7 a7c7
 info depth 29 seldepth 55 multipv 1 score cp -25 nodes 1379623089 nps 18924611 hashfull 850 tbhits 105052 time 72901 pv c6c7 a7c7
 info depth 29 seldepth 55 multipv 1 score cp -16 nodes 1403706486 nps 18942896 hashfull 857 tbhits 109646 time 74102 pv c6c7
 info depth 29 seldepth 55 multipv 1 score cp 0 nodes 1468512920 nps 18982109 hashfull 871 tbhits 139560 time 77363 pv c6c7 a7c7 d2d1 c4e3 g4g5 e8c8 d1f3 c7c5 g5h6 e3f5 h6h7 a5c6 g2g5 f5d4 f3h5 c5c2 g5b5 d4e6 h5h1 e6f8 h7g8 a4a3 g1c1 f8e6 g8h7 e6f8 h7g7 f8e6 g7h7
 info depth 30 seldepth 55 multipv 1 score cp 0 nodes 1619068115 nps 19061315 hashfull 904 tbhits 218359 time 84940 pv c6c7 a7c7 d2d1 c4e3 g4g5 e8c8 d1f3 c7c5 g5h6 e3f5 h6h7 a5c6 g2g5 f5d4 f3h5 c5c2 g5b5 d4e6 h5h1 e6f8 h7g8 f8e6 g8h7
 info depth 31 seldepth 55 multipv 1 score cp 0 nodes 1692382182 nps 19079414 hashfull 913 tbhits 310523 time 88702 pv c6c7 a7c7 d2d1 c4e3 g4g5 e8c8 d1f3 c7c5 g5h6 e3f5 h6h7 a5c6 g2g5 f5d4 f3h5 c5c2 g5b5 d4b5 h5b5 c8c7 b5a4 c2h2 h7g7 d8h8 g7f7 c6d8 f7g7 d8e6 g7f7 e6d8
 info depth 32 seldepth 55 multipv 1 score cp 0 nodes 1869577865 nps 19076157 hashfull 947 tbhits 532212 time 98006 pv c6c7 a7c7 d2d1 c4e3 g4g5 e8c8 d1f3 c7c5 g5h6 e3f5 h6h7 a5c6 g2g5 f5d4 f3h5 c5c2 g5b5 d4b5 h5b5 c8c7 b5a4 c2h2 h7g7 d8h8 g7f7 c6d8 f7g7 d8e6 g7f7 e6d8
 info depth 33 seldepth 55 multipv 1 score cp 0 nodes 2002665034 nps 19069004 hashfull 960 tbhits 645283 time 105022 pv c6c7 a7c7 d2d1 c4e3 g4g5 e8c8 d1f3 c7c5 g5h6 e3f5 h6h7 a5c6 g2g5 f5d4 f3h5 c5c2 g5b5 d4b5 h5b5 c8c7 b5a4 c2h2 h7g7 d8h8 g7f7 c6d8 f7g7 d8e6 g7f7 e6d8
 info depth 34 seldepth 55 multipv 1 score cp 7 nodes 2218451251 nps 19085914 hashfull 972 tbhits 764613 time 116235 pv c6c7
 info depth 34 seldepth 55 multipv 1 score cp 14 nodes 2231365910 nps 19087164 hashfull 972 tbhits 766882 time 116904 pv c6c7
 info depth 34 seldepth 55 multipv 1 score cp 25 nodes 2333233265 nps 19091062 hashfull 979 tbhits 778383 time 122216 pv c6c7
 info depth 34 seldepth 55 multipv 1 score cp 40 nodes 2416984181 nps 19097988 hashfull 982 tbhits 786019 time 126557 pv c6c7
 info depth 34 seldepth 55 multipv 1 score cp 61 nodes 2700003786 nps 19092767 hashfull 989 tbhits 923611 time 141415 pv c6c7
 info depth 34 seldepth 72 multipv 1 score cp 44 nodes 2767178621 nps 19094130 hashfull 990 tbhits 1005525 time 144923 pv c6c7 a7c7
 info depth 34 seldepth 72 multipv 1 score cp 66 nodes 2886351190 nps 19065288 hashfull 992 tbhits 1134648 time 151393 pv c6c7
 info depth 34 seldepth 72 multipv 1 score cp 114 nodes 3092907551 nps 19052857 hashfull 994 tbhits 1169690 time 162333 pv c6c7
 info depth 34 seldepth 72 multipv 1 score cp 176 nodes 5174961387 nps 19097278 hashfull 999 tbhits 1770881 time 270979 pv c6c7
 info depth 34 seldepth 72 multipv 1 score cp 161 nodes 5598277493 nps 19085969 hashfull 999 tbhits 1867554 time 293319 pv c6c7 a7c7 d2d5 c7b7 g4g5 e8d8 d5f7 d8c7 g5f4 c4e5 f7h7 b7b8 g2g8 a4a3 g8b8 a8b8 h7g7 a5b7 g1a1 b7d8 g7h7 b5b4 f4g3 d8c6 f6f7 b8f8 a1f1 a3a2 h7e4 f8f7 f1a1 d6d5 e4d5 f7f3 g3g2 f3e3 a1a2 e3c3 g2f1 e5c4 f1e1 c7b6 d5f7 c4e3 e1d2 e3c4 d2d1 c4e3 d1c1 e3c4 f7f2 b6c7 f2f4 c7b7
 info depth 35 seldepth 72 multipv 1 score cp 168 nodes 5680741304 nps 19082164 hashfull 999 tbhits 1890944 time 297699 pv c6c7
 info depth 35 seldepth 72 multipv 1 score cp 176 nodes 5710269423 nps 19079640 hashfull 999 tbhits 1899187 time 299286 pv c6c7
 info depth 35 seldepth 72 multipv 1 score cp 168 nodes 6155105762 nps 19054108 hashfull 999 tbhits 2045969 time 323033 pv c6c7 a7c7
 info depth 35 seldepth 72 multipv 1 score cp 177 nodes 6243100954 nps 19058480 hashfull 999 tbhits 2106978 time 327576 pv c6c7
 info depth 35 seldepth 72 multipv 1 score cp 165 nodes 6662063826 nps 19064317 hashfull 999 tbhits 2361067 time 349452 pv c6c7 a7c7
 info depth 35 seldepth 72 multipv 1 score cp 182 nodes 6800849486 nps 19074843 hashfull 999 tbhits 2472025 time 356535 pv c6c7
 info depth 35 seldepth 72 multipv 1 score cp 199 nodes 7173136492 nps 19084596 hashfull 999 tbhits 2710781 time 375860 pv c6c7 a7c7 d2d5 c7c8 g4h3 e8d8 g2g5 d8c7 d5b5 a4a3 b5d5 c4e3 d5f7 c8f8 f7e7 e3c4 e7e4 c4b6 g1a1 a5c6 e4f4 a8a4 f4f2 b6c4 g5g3 a3a2 h3g2 c6e5 c2c3 a4a5 g2h1 f8h8 h1g1 h8a8 f6f7 a8f8 g3g7 f8f7 g7f7 e5f7 f2f7 c4e5 f7b3
 info depth 36 seldepth 72 multipv 1 score cp 192 nodes 7609581867 nps 19099684 hashfull 999 tbhits 2981987 time 398414 pv c6c7 a7c7
 info depth 36 seldepth 72 multipv 1 score cp 185 nodes 7740658522 nps 19099014 hashfull 999 tbhits 3063544 time 405291 pv c6c7 a7c7
 info depth 36 seldepth 72 multipv 1 score cp 174 nodes 7798225468 nps 19097570 hashfull 999 tbhits 3102608 time 408336 pv c6c7 a7c7
 info depth 36 seldepth 72 multipv 1 score cp 159 nodes 8115824681 nps 19109907 hashfull 999 tbhits 3270600 time 424692 pv c6c7 a7c7
 info depth 36 seldepth 72 multipv 1 score cp 171 nodes 8696083033 nps 19133759 hashfull 999 tbhits 3586779 time 454489 pv c6c7
 info depth 36 seldepth 78 multipv 1 score cp 170 nodes 9091431187 nps 19147030 hashfull 999 tbhits 3924057 time 474822 pv c6c7 a7c7 d2d5 c7c8 g4f3 e8d8 g2g5 a5c6 g5g8 d8c7 g8c8 a8c8 d5b5 c4e5 f3f2 c8a8 e3e4 a8a5 b5b2 d6d5 e4d5 a5d5 b2a2 d5d4 g1g8 e5g4 f2f3 c6e5 f3g2 d4c4 a2a3 c4c2 g2g1 c2c4 g8a8 c7c6 a8a4 c4a4 a3a4 c6d6 a4a6 e5c6 g1g2 g4f6 g2f3 f6d5 f3g4 d6e5 a6e2 e5f6 e2f3 f6e6 f3h3 e6d6 g4g5 f7f6 g5g4 c6d4
 info depth 37 seldepth 78 multipv 1 score cp 163 nodes 9424102968 nps 19151644 hashfull 999 tbhits 4105285 time 492078 pv c6c7 a7c7
 info depth 37 seldepth 78 multipv 1 score cp 170 nodes 9636920881 nps 19154204 hashfull 999 tbhits 4241685 time 503123 pv c6c7
 info depth 37 seldepth 78 multipv 1 score cp 163 nodes 9866908899 nps 19147520 hashfull 999 tbhits 4424955 time 515310 pv c6c7 a7c7
 info depth 37 seldepth 78 multipv 1 score cp 172 nodes 9989464986 nps 19150773 hashfull 999 tbhits 4489462 time 521622 pv c6c7
 info depth 37 seldepth 78 multipv 1 score cp 162 nodes 10567404664 nps 19170973 hashfull 999 tbhits 4852471 time 551219 pv c6c7 a7c7 d2d5 c7c8 g4f3 e8d8 g2g5 a5c6 g5g8 d8c7 g8c8 a8c8 d5b5 c4e5 f3f2 c8a8 e3e4 a8a5 b5b2 a4a3 b2b3 c6d4 b3c3 d4c6 g1a1 a5a4 a1a3 a4e4 a3a7 c7c8 a7a8 c8c7 c3a3 e4c4 c2c3 c4f4 f2g3 f4f6 a3a6 f6f3 g3g2 d6d5 a8c8 c7d6 a6a3 d6e6 c8e8 e6f5 a3c1 d5d4 c3d4 c6d4 c1e1 d4e6 e8g8 d7d5 e1h4 f3c3 h4f2 f5e4

it's now over two - will let it keep running overnight

[Nordlandia]

Possible cook

draw

[d]1n6/1P3P1n/N5Rp/q5pk/PR3p2/7P/2P3P1/7K w - - 0 0

[MikeB]

settled in just under two after a half trillion nodes

Code: Select all

info depth 54 seldepth 92 multipv 1 score cp 184 nodes 319975404224 nps 20195553 hashfull 999 tbhits 576605980 time 15843854 pv c6c7 a7c7 d2d5 c7c8 g4f3 e8d8 g2g5 a5c6 g5g8 d8c7 g8c8 a8c8 f3f2 c4e5 g1d1 c8a8 d5d6 c7b6 d1b1 a4a3 b1a1 a8a7 d6d5 a7a5 c2c3 a5a7 f2g3 a7a8 g3h3 a8h8 h3g2 h8a8 a1a2 a8a4 g2f1 a4a7 f1f2 e5g4 f2f3 g4e5 f3g3 a7a4 g3h3 a4a7 a2a1 a7a5 h3h2 a5a8 h2g3 a8a4 a1a2 a4a8 e3e4 a8g8 g3h3 g8a8 h3g2 a8a7 g2f2 a7a4 f2g3 a4a8 d5d6 a8g8 g3f2 e5g4 f2e1 g8e8 e1f1 e8e4 a2a3 g4e3 f1f2
info depth 55 seldepth 100 multipv 1 score cp 176 nodes 580532234326 nps 20280885 hashfull 999 tbhits 1204951233 time 28624600 pv c6c7 a7c7

[Nordlandia]

Possible cook

draw

No 19215 | P. Arestov | 3rd Price

[d]2q2b2/pp2rp1P/6P1/pPP5/P6p/3Q1P2/3KP3/k3N3 b - - 0 0

[MikeGL]

No 13985 N.Sikdar
special honourable mention,
Shakhmaty v SSSR 1970

White draws!
[d]B1k1K2B/3N4/6p1/PP1N3P/Pp5P/1p4pP/2pppp2/b6q w - - 0 1

Forced perpetual line with both knights.

[pgn]
[Event "Computer chess game"]
[Site "Talkchess"]
[Date "2017.08.10"]
[Round "?"]
[White "McBrain_2017"]
[Black "?"]
[Result "1/2-1/2"]
[TimeControl "240+6"]
[SetUp "1"]
[FEN "B1k1K2B/3N4/6p1/PP1N3P/Pp5P/1p4pP/2pppp2/b6q w - - 0 1"]
[Termination "normal"]
[PlyCount "47"]
[WhiteType "human"]
[BlackType "human"]

1. Ne7+ Kc7 2. b6+ Kd6 3. Nc8+ Ke6 4. Nf8+ Kf5 5. Nd6+ Kf4 6. Nxg6+ Ke3 7.
Nf5+ Kd3 8. Nf4+ Kc4 9. Ne3+ Kc5 10. Nd3+ Kd6 11. Nc4+ Ke6 12. Nc5+ Kf5 13.
Nd6+ Kf4 14. Ne6+ Ke3 15. Nf5+ Kd3 16. Nf4+ Kc4 17. Ne3+ Kc5 18. Nd3+ Kd6
19. Nc4+ Ke6 20. Nc5+ Kf5 21. Nd6+ Kf4 22. Ne6+ Ke3 23. Nf5+ Kd3 24. Nf4+
{3-fold repetition 1/2 - 1/2} 1/2-1/2
[/pgn]

.