Author: Steve Timson
Date: 02:11:43 08/17/01
Go up one level in this thread
I checked this out with chester as well. Chester sticks to Ng3 for as long as I was willing to watch it. I looked at the PV and noticed the last 4 moves: 48.05s 11 8929638 -1.94 1. ... Ng3 2. Qh2 Nxh1 3. Rxh1 f6 4. Qh7+ Kf7 5. Bh6 Rg8 6. Bxc4 Rxc4 7. Bxg7 Rxg7 It is trading a bishop for knight and then bishop for bishop, using horizon effect to push off seeing the problem with the king. At the moment I have my recap extension limitted to cases where the material balance is returned to the root value. Because of the NxR earlier - these caps don't trigger my recap and don't get extended. So I went and took that restriction off. Chester then switches off Ng3 at ply 10, even switching off briefly at ply 8. Of course, a lot more nodes are involved, which is why I have that restriction on the recap extension in the first place. So it seems to me that recap and how it is handled is a key in seeing things in this position. There happen to be some nice trades on the board that let the engine push off seeing its demise for quite a while. - Steve
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