Author: Dann Corbit
Date: 13:29:59 12/26/01
Go up one level in this thread
On December 22, 2001 at 07:12:00, Steffen Jakob wrote: >Hi! > >I ran the JenoBan endgame test suite which I got from Lyapko Georges web server >(http://www.geocities.com/lyapko/jenoban.htm). This is position #79 (the id tag >is missing in the epd file from this server): > >r2k1B2/7R/p7/8/8/8/8/4K3 w - - bm Bc5; (JenoBan_TofE) #79 white_wins > >[D]r2k1B2/7R/p7/8/8/8/8/4K3 w - - > >Hossa switches between Bb4 and Bc5 but both with a drawish score. Crafty prefers >Bd6 on my machine, also with a drawish score. Can someone please explain why Bc5 >is the best move here and how it wins? Or is this position broken? Pepito switches permanently at ply 12 and 15 seconds, and then the eval goes very high at ply 20. By ply 22, it is a rook up, about. 5 40 92 6884 Re1-e2 Ta8-c8 Re2-e3 a5 Af8-g7 5 40 94 16707 Re1-e2 Ta8-c8 Re2-e3 a5 Af8-g7 6 36 96 24250 Re1-e2 a5 Re2-e3 a4 Af8-e7 Rd8-d7 Re3-d4 6 36 101 50947 Re1-e2 a5 Re2-e3 a4 Af8-e7 Rd8-d7 Re3-d4 7 40 107 80080 Re1-e2 a5 Af8-h6 Ta8-c8 Ah6-g5 Rd8-e8 Th7-e7 Re8-d8 Re2-e3 a4 Re3-e4 7 43 116 122103 Af8-b4 Ta8-c8 Re1-e2 Tc8-c4 Ab4-e7 Rd8-d7 Re2-d3 Tc4-c6 7 43 124 163753 Af8-b4 Ta8-c8 Re1-e2 Tc8-c4 Ab4-e7 Rd8-d7 Re2-d3 Tc4-c6 8 36 135 220145 Af8-b4 Rd8-c8 Re1-d2 a5 Ab4xa5 Ta8xa5 Rd2-e3 Ta5-c5 8 39 145 270481 Re1-e2 a5 Af8-b4 Rd8-c8 Ab4xa5 8 39 170 414413 Re1-e2 a5 Af8-b4 Rd8-c8 Ab4xa5 9 39 202 596947 Re1-e2 a5 Th7-b7 Ta8-c8 Af8-e7 Rd8-e8 Re2-e3 a4 Re3-d4 Re8-f7 Rd4-d5 9 43 222 708963 Af8-b4 Rd8-c8 Re1-d2 Ta8-b8 Ab4-d6 Tb8-b7 Ad6-e7 Rc8-d7 Rd2-e3 9 46 243 837293 Af8-c5 Rd8-c8 Re1-e2 a5 Re2-e3 a4 Th7-e7 Ta8-b8 Re3-e4 9 46 273 1022224 Af8-c5 Rd8-c8 Re1-e2 a5 Re2-e3 a4 Th7-e7 Ta8-b8 Re3-e4 10 39 294 1147470 Af8-c5 Rd8-c8 Re1-e2 a5 Re2-e3 Ta8-b8 Re3-e4 Tb8-b7 Ac5-e7 a4 10 39 451 2067822 Af8-c5 Rd8-c8 Re1-e2 a5 Re2-e3 Ta8-b8 Re3-e4 Tb8-b7 Ac5-e7 a4 11 35 642 3179719 Af8-c5 Rd8-c8 Ac5-d6 a5 Re1-d2 Ta8-a6 Ad6-e5 a4 Rd2-e3 a3 Th7-c7 Rc8-d8 Re3-d4 11 38 848 4359338 Re1-e2 a5 Af8-c5 Ta8-a6 Re2-e3 a4 Re3-d4 Ta6-g6 Ac5-a3 Tg6-g4 Rd4-d5 Rd8-e8 11 38 1060 5639409 Re1-e2 a5 Af8-c5 Ta8-a6 Re2-e3 a4 Re3-d4 Ta6-g6 Ac5-a3 Tg6-g4 Rd4-d5 Rd8-e8 12 38 1398 7587314 Re1-e2 a5 Af8-c5 Ta8-a6 Re2-e3 a4 Re3-d4 Ta6-g6 Ac5-a3 Tg6-g4 Rd4-d5 Tg4-g5 Rd5-e4 Tg5-g4 Re4-e5 12 47 1539 8461553 Af8-c5 Ta8-c8 Ac5-b6 Rd8-e8 Re1-e2 Tc8-c3 Th7-g7 Tc3-c6 Tg7-b7 a5 Ab6xa5 Tc6-c2 Re2-d3 Tc2-c8 12 47 1707 9508872 Af8-c5 Ta8-c8 Ac5-b6 Rd8-e8 Re1-e2 Tc8-c3 Th7-g7 Tc3-c6 Tg7-b7 a5 Ab6xa5 Tc6-c2 Re2-d3 Tc2-c8 13 48 1824 10181162 Af8-c5 Ta8-c8 Ac5-b6 Rd8-e8 Re1-e2 Tc8-c3 Th7-g7 Tc3-b3 Ab6-c7 Re8-f8 Tg7-h7 Tb3-c3 Re2-d2 Rf8-g8 Th7-e7 13 48 2144 12173058 Af8-c5 Ta8-c8 Ac5-b6 Rd8-e8 Re1-e2 Tc8-c3 Th7-g7 Tc3-b3 Ab6-c7 Re8-f8 Tg7-h7 Tb3-c3 Re2-d2 Rf8-g8 Th7-e7 14 58 2564 14652729 Af8-c5 Ta8-c8 Ac5-b6 Rd8-e8 Ab6-c7 a5 Re1-d2 a4 Rd2-c3 a3 Rc3-b3 a2 Rb3xa2 Tc8-a8 Ra2-b3 Ta8-c8 Rb3-c4 Re8-f8 14 58 2808 16241547 Af8-c5 Ta8-c8 Ac5-b6 Rd8-e8 Ab6-c7 a5 Re1-d2 a4 Rd2-c3 a3 Rc3-b3 a2 Rb3xa2 Tc8-a8 Ra2-b3 Ta8-c8 Rb3-c4 Re8-f8 15 68 2959 17280397 Af8-c5 Ta8-c8 Ac5-b6 Rd8-e8 Ab6-c7 a5 Re1-d2 a4 Rd2-c3 a3 Rc3-b3 a2 Rb3xa2 Tc8-a8 Ra2-b3 Ta8-c8 Rb3-c4 Re8-f8 Rc4-d 4 15 68 3272 19333116 Af8-c5 Ta8-c8 Ac5-b6 Rd8-e8 Ab6-c7 a5 Re1-d2 a4 Rd2-c3 a3 Rc3-b3 a2 Rb3xa2 Tc8-a8 Ra2-b3 Ta8-c8 Rb3-c4 Re8-f8 Rc4-d 4 16 65 3638 21899016 Af8-c5 Ta8-c8 Ac5-b6 Rd8-e8 Ab6-c7 a5 Re1-d2 a4 Rd2-c3 a3 Rc3-b3 a2 Rb3xa2 Tc8-a8 Ra2-b3 Ta8-a6 Rb3-c4 Ta6-f6 Rc4-d 4 Tf6-f8 16 65 4293 26266849 Af8-c5 Ta8-c8 Ac5-b6 Rd8-e8 Ab6-c7 a5 Re1-d2 a4 Rd2-c3 a3 Rc3-b3 a2 Rb3xa2 Tc8-a8 Ra2-b3 Ta8-a6 Rb3-c4 Ta6-f6 Rc4-d 4 Tf6-f8 17 58 5035 31293106 Af8-c5 Ta8-c8 Ac5-b6 Rd8-e8 Ab6-c7 a5 Re1-d2 a4 Rd2-c3 a3 Rc3-b3 a2 Rb3xa2 Tc8-a8 Ra2-b3 Ta8-a6 Rb3-c4 Ta6-f6 Ac7-e 5 Tf6-f7 Ae5-g7 17 58 6277 39303783 Af8-c5 Ta8-c8 Ac5-b6 Rd8-e8 Ab6-c7 a5 Re1-d2 a4 Rd2-c3 a3 Rc3-b3 a2 Rb3xa2 Tc8-a8 Ra2-b3 Ta8-a6 Rb3-c4 Ta6-f6 Ac7-e 5 Tf6-f7 Ae5-g7 18 49 7455 46930177 Af8-c5 Ta8-c8 Ac5-b6 Rd8-e8 Ab6-c7 a5 Re1-d2 a4 Rd2-c3 a3 Rc3-b3 a2 Rb3xa2 Tc8-a8 Ra2-b3 Ta8-a6 Rb3-c4 Ta6-f6 Ac7-e 5 Tf6-f7 Ae5-g7 Re8-d7 18 49 10202 64312325 Af8-c5 Ta8-c8 Ac5-b6 Rd8-e8 Ab6-c7 a5 Re1-d2 a4 Rd2-c3 a3 Rc3-b3 a2 Rb3xa2 Tc8-a8 Ra2-b3 Ta8-a6 Rb3-c4 Ta6-f6 Ac7-e 5 Tf6-f7 Ae5-g7 Re8-d7 19 53 11531 72729567 Af8-c5 Ta8-c8 Ac5-b6 Rd8-e8 Ab6-c7 a5 Re1-d2 a4 Rd2-c3 a3 Rc3-b3 a2 Rb3xa2 Tc8-a8 Ra2-b3 Ta8-a6 Ac7-g3 Ta6-g6 Ag3-h 4 Tg6-c6 Th7-b7 Tc6-c8 Ah4-f2 19 53 14474 90929439 Af8-c5 Ta8-c8 Ac5-b6 Rd8-e8 Ab6-c7 a5 Re1-d2 a4 Rd2-c3 a3 Rc3-b3 a2 Rb3xa2 Tc8-a8 Ra2-b3 Ta8-a6 Ac7-g3 Ta6-g6 Ag3-h 4 Tg6-c6 Th7-b7 Tc6-c8 Ah4-f2 20 86 15227 95632123 Af8-c5 !! 20 186 15228 95646337 Af8-c5 !! 20 467 17264 109475003 Af8-c5 Ta8-c8 Ac5-b6 Rd8-e8 Ab6-c7 a5 Re1-d2 a4 Rd2-c2 a3 Rc2-b1 a2 Rb1-a1 Tc8-a8 Th7-h8 Re8-d7 Th8xa8 Rd7xc7 Ta8- a6 Rc7-b7 Ta6-d6 Rb7-c7 Td6-d2 Rc7-c6 Ra1xa2 20 467 20243 130638330 Af8-c5 Ta8-c8 Ac5-b6 Rd8-e8 Ab6-c7 a5 Re1-d2 a4 Rd2-c2 a3 Rc2-b1 a2 Rb1-a1 Tc8-a8 Th7-h8 Re8-d7 Th8xa8 Rd7xc7 Ta8- a6 Rc7-b7 Ta6-d6 Rb7-c7 Td6-d2 Rc7-c6 Ra1xa2 21 434 33193 223004730 Af8-c5 ?? Ta8-c8 Ac5-b6 Rd8-e8 Ab6-c7 a5 Re1-d2 a4 Rd2-c2 a3 Rc2-b1 a2 Rb1-a1 Tc8-a8 Th7-h8 Re8-d7 Th8xa8 Rd7xc7 T a8-a6 Rc7-b7 Ta6-d6 Rb7-c7 Td6-d2 Rc7-c6 Ra1xa2 21 435 33205 223080916 Af8-c5 !! 21 469 37318 250704805 Af8-c5 Ta8-c8 Ac5-b6 21 469 37318 250704830 Af8-c5 Ta8-c8 Ac5-b6 22 436 48862 331098954 Af8-c5 ?? Ta8-c8 Ac5-b6 22 336 66969 460822087 Af8-c5 ?? Ta8-c8 Ac5-b6 22 337 67299 463240168 Af8-c5 !! 22 437 67301 463254555 Af8-c5 !! 22 474 67400 463943004 Af8-c5 Ta8-c8 Ac5-b6 Rd8-e8 Ab6-c7 a5 Re1-d2 a4 Rd2-c2 a3 Rc2-b1 a2 Rb1-a1 Tc8-a8 Th7-h8 Re8-d7 Th8xa8 Rd7xc7 Ta8- a6 Rc7-b7 Ta6-g6 Rb7-a7 Ra1xa2 Ra7-b7 Ra2-b3 Rb7-c7 22 474 67401 463943029 Af8-c5 Ta8-c8 Ac5-b6 Rd8-e8 Ab6-c7 a5 Re1-d2 a4 Rd2-c2 a3 Rc2-b1 a2 Rb1-a1 Tc8-a8 Th7-h8 Re8-d7 Th8xa8 Rd7xc7 Ta8- a6 Rc7-b7 Ta6-g6 Rb7-a7 Ra1xa2 Ra7-b7 Ra2-b3 Rb7-c7
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