Author: Uri Blass
Date: 15:12:40 09/06/04
Go up one level in this thread
On September 06, 2004 at 17:50:11, Stuart Cracraft wrote: >On September 06, 2004 at 16:37:00, Uri Blass wrote: > >>On September 06, 2004 at 15:07:00, Stuart Cracraft wrote: >> >>>[D] 5n2/B3K3/2p2Np1/4k3/7P/3bN1P1/2Prn1P1/1q6 w - - 0 0 >>> >>>Anyone can get this besides Ed? >>> >>>Please post your search times. >> >>Yes >> >>Latest movei does it in 0.17 seconds at depth 6 on A3000 and movei that >>participates in WBEC does a similiar result. >> >> >>6 9941 17 133417 e3g4 e5f5 g4h6 f5e5 h6f7 e5f5 f7d6 f5e5 f6g4 e5d5 g4e3 d5e5 >>d6f7 e5e4 f7g5 e4e5 g5f3 e5e4 f3d2 e4e5 d2f3 e5e4 f3g5 e4e5 g5f7 e5e4 f7d6 e4e5 >>e3g4 e5d5 g4f6 d5e5 d6f7 e5f5 f7h6 f5e5 h6g4 e5f5 g4e3 f5e5 f6g4 e5e4 g4f2 e4e5 >>f2d3 e5e4 d3f2 e4e5 f2g4 e5e4 g4f6 e4e5 e3c4 e5f5 c4d6 f5e5 f6g4 e5d5 c2c4 >>6 9941 17 135968 e3g4 e5f5 g4h6 f5e5 h6f7 e5f5 f7d6 f5e5 f6g4 e5d5 g4e3 d5e5 >>d6f7 e5e4 f7g5 e4e5 g5f3 e5e4 f3d2 e4e5 d2f3 e5e4 f3g5 e4e5 g5f7 e5e4 f7d6 e4e5 >>e3g4 e5d5 g4f6 d5e5 d6f7 e5f5 f7h6 f5e5 h6g4 e5f5 g4e3 f5e5 f6g4 e5e4 g4f2 e4e5 >>f2d3 e5e4 d3f2 e4e5 f2g4 e5e4 g4f6 e4e5 e3c4 e5f5 c4d6 f5e5 f6g4 e5d5 c2c4 >> >>Uri > >Had you tuned previously with this position (seen it before)? Yes but when I did the change that let movei to solve it I did not think specifically about this position(in the past I did not find a solution that will be good both for this position and other positions so I did not keep it but I think that later I found good ideas for change that is good both for this position and other positions). Now I am afraid that movei may crash in some positions After all if it can search 59 plies with searching to depth of 6 plies it may also search more than 100 plies with searching to depth of 11 plies in some position. The chance that it can crash is very small and I know that it played hundreds of games without crashing including many games in Leo's tournament but I will probably check in the beginning of the search that ply is not too big in order to prevent problems even if they are very rare. Note that in this case it extends almost 2 plies for a single reply to check but in most cases it does not extend so much and the extension of almost 2 plies that I have usually does not cause the tree to explode relative to no extension. Uri
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