Author: Uri Blass
Date: 06:52:25 08/29/04
Go up one level in this thread
On August 29, 2004 at 09:37:13, Uri Blass wrote: >On August 29, 2004 at 08:58:46, Vasik Rajlich wrote: > >>White to play and avoid Rg5. According to my calculations, you'd need a 120-ply >>search to understand that Rg5 draws. >> >>Vas >> >>[D] 8/6k1/4p1r1/4Pp1R/5P2/5K2/7P/8 w - - 0 1 > >You do not need to see that Rg5 draws in order to avoid Rg5 >It is enough to find a move that is evaluated as better. > > >Stupid Movei does not know much about endgame and does not use hash for pruning >but it avoid Rg5 from the first second. > >I guess that after I add some knowledge it may have a problem to avoid Rg5 > >depth=18 +1.75 h2h4 g7f7 h5g5 g6h6 h4h5 h6h8 f3g3 h8h6 g3h4 h6h8 g5g2 h8h7 g2g3 >f7e7 g3g6 e7d7 h4g5 >Nodes: 286711354 NPS: 769922 >Time: 00:06:12.39 >depth=18 +1.75 h2h4 g7f7 h5g5 g6h6 h4h5 h6h8 f3g3 h8h6 g3h4 h6h8 g5g2 h8h7 g2g3 >f7e7 g3g6 e7d7 h4g5 >Nodes: 315137376 NPS: 780448 >Time: 00:06:43.79 >depth=19 +1.77 h2h4 g6h6 h5g5 g7f7 h4h5 h6h8 f3g3 h8d8 h5h6 d8h8 g5g7 f7f8 g7g6 >f8f7 g6f6 f7e7 g3f2 h8h7 f2e3 e7d7 f6g6 d7e7 >Nodes: 393358321 NPS: 781884 >Time: 00:08:23.09 > >Uri There was a reduction at depth 20 so I was interested to see if movei may find Rg5 but it was only a temporary reduction depth=21 +1.93 h2h4 g6h6 h5g5 g7f7 h4h5 h6h8 f3g3 h8d8 h5h6 d8h8 g5g7 f7f8 g7g6 f8f7 g6f6 f7e7 g3f3 h8g8 h6h7 g8a8 f6h6 a8h8 h6h2 e7f7 Nodes: 1287416720 NPS: 795708 Time: 00:26:57.95 Uri
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