Author: Howard Exner
Date: 10:41:45 12/02/00
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On December 02, 2000 at 11:37:52, James T. Walker wrote: >On December 01, 2000 at 12:57:57, Franck ZIBI wrote: > >> >>In the round 2.2 of the World Championship in India (1st Dec.), >>Anand faced IGM Bologan with white, and reached the following position : >> >>[D] 2b1rb1k/2r2ppp/n2p4/3P2PN/3NPQ2/2p3RP/1q3PK1/1B1R4 w - - >> >>Bologan has just played 36. ... c3 with (what looks like) >>a very good position for black (the c3 pawn is a monster). >> >>But Anand played here an impressive move that forced his opponent to >>resign 5 moves later: >> >>Nf6!! >> >>The idea is that after >>37. Nf6 gxf6 >>38. gxf6 Re5 >>39. Nf5! is winning for white >> >>and after: >>37. Nf6 gxf6 >>38. gxf6 h6 >>39. Kh1 (with the idea Rdg1) is very strong for white. >> >>Is any program able to find Nf6 at tournament time control ? >> >>Regards. > > >Rebel Century 3.0 plays Nf6 after about 30 (13 ply) minutes on my Athlon 900. >An interesting feature of Rebel Century 3.0 is after seeing this move it stores >it using the CAT feature. So now when I show this position to Rebel again it >plays the move instantly and will search 13 plies in about 3 minutes. I'm not >sure of the value of this feature but it is interesting. I have aobut 139000 of >these positions stored on disk. Of course most came with the program but a few >hundred are a result of playing computer/computer games since receiving the >program. >Jim If you add this line to the default personality(save it as something other than rebel.eng), [More Speed = PRUNE BAD MOVES_4] it will play Nf6 in under 12 minutes on an Athlon 900. In this example the aggressive pruning line works. For other positions it may be too aggresive in the pruning and prune out good moves until a later ply or two is needed. Overall the prune bad moves parameter weakens the play of RC3 but it may be usefull for an analysis engine.
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