Author: James Robertson
Date: 14:28:29 11/23/99
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On November 23, 1999 at 16:04:49, Dan Andersson wrote: >These these positions appeared in my two latest 40moves/2hours games at the club >championship. They are highly tactical in their nature. I have tested them on >some programs and the evaluations of some of the programs are less than >accurate. In the first position black felt forced to play Qxh4 is white winning, >or is it merly a draw? Does your program play Qxh4? Here are Insomniac's thoughts on a P233, 4MB hash. After 5 minutes, it likes Qh6. Still isn't too thrilled with black, though. James Depth Score Time Nodes PV 1 -31 0 45 Qxh4 2 -69 0 193 Qxh4 Qg6+ Kf8 3 -83 60 1607 Qxh4 Qg6+ Kf8 b3 4 -102 330 3961 Qxh4 Qg6+ Kf8 Qf6+ Ke8 Bg6+ Kd7 5 -215 440 9622 Qxh4 Qg6+ Kf8 Qf6+ Ke8 Bg6+ Kd7 Qg7+ Be7 Qxe5 6> -316 1050 36385 Qf7 hxg5 Rh3 Kg2 Rh4 g6 6> -312 1320 49068 Qe8 hxg5 Rh3 g6 Ba6 Kg2 6> -227 1930 77358 Qh6 h5 Rhf8 Kg2 Rf4 Qg6+ Qxg6 hxg6 6 -227 1930 79718 Qh6 h5 Rhf8 Kg2 Rf4 Qg6+ Qxg6 hxg6 7 -214 3140 144034 Qh6 h5 Rhf8 Nc4 Rf4 Qe2 Ba6 8 -224 6600 349067 Qh6 h5 Rdf8 Nc4 Rf4 Qe2 Ba6 Be4 9> -204 23400 1220932 Qxh4 Qg6+ Kf8 Qf6+ Kg8 Ng2 Qh2+ Kf1 Rd7 Qxg5+ Kf7 Qg6+ Kf8 g5 9 -204 25220 1316839 Qxh4 Qg6+ Kf8 Qf6+ Kg8 Ng2 Qh2+ Kf1 Rd7 Qxg5+ Kf7 Qg6+ Kf8 g5 10 -212 37630 1951191 Qxh4 Qg6+ Kf8 Qf6+ Kg8 Ng2 Qh2+ Kf2 Bc7 d6 Bb6 Qxg5+ Kf7 Qe7+ Kg8 11 -207 80250 4067964 Qxh4 Qg6+ Kf8 Qf6+ Kg8 Ng2 Qh2+ Kf1 Bc7 Qxg5+ Kf8 Qf6+ Kg8 Qc6 Bd6 g5 12> -230 289680 15978763 Qh6 h5 Rdf8 Nc4 Rf4 Qe2 Ba6 Bd3 Bxc4 Bxc4 Qf6 Kg2 Rd4 12 -230 320600 17570483 Qh6 h5 Rdf8 Nc4 Rf4 Qe2 Ba6 Bd3 Bxc4 Bxc4 Qf6 Kg2 Rd4 >2br3r/p5k1/3b4/2pPp1pq/Pp2Q1PP/4NP2/1PB5/R2R2K1 b - - 0 1 >In the second position the move is obvious, or not? >r2q2k1/pp4b1/3np2r/3p1p2/3P1P2/2N1PBK1/PP5Q/2R4R w - - 0 1 >Does your program find Qxh6 and in reasonable time and with a correct >evaluation, better for white? The really interesting thing about the second >position is that I spent half an hour four moves earlier and the sac. was made >instantly. Doing the checking out of the combination in question early, I dont >think any computers work that way. > >Regards Dan Andersson
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