Author: scott farrell
Date: 05:53:35 01/02/03
This position arose in a game between chompster and a human kjf on ICC. kjf ran his clock down to about 6 secs in a 5 1 blitz game, my chompster had 4:30 on the clock, and lost !!! This is the position after Nxb2 ... blunder .... [D] r3qrk1/pp1b1ppp/8/4p1Q1/4N3/3B4/PnP3PP/2K2R2 w - - 0 19 The trick is to avoid taking the black queen, and instead Bxh7. Can some people let me know how nodes and what ply they solve this in. Any inside into extensions, null move/pruning exclusions that helped would be interesting. A slightly older crafty (18.14) needs about a guestimated 1.9 million nodes for the final score, and about 600K nodes to see the fail-high, at depth 8. My chompster engine needs 1 million nodes to see the fail high, then 1.7million nodes to see a score of over +3. my engine didnt see this tactic in the previous move, and doesnt see it until some 6 million nodes, too many for my slow 100Knps program to see in a blitz game. I am still trying to work out why it even wanted to play Nxb2 on the previous move, I think it was trying to avoid a large number of checking moves, quite clearly f5,h6,f6 are all better/safer/simpler. BTW does anyone know how to get a nice analysis out of CM8000 - all I can get is a few english phrases which are nice, but no score/depth/node count etc. CM8000 would only tell me about swapping queens for knights and bishops and such like, and never did Bxh7, but I never got it to run proper analysis ... Thanx Scott
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