Author: Laurence Chen
Date: 05:04:49 06/27/00
Go up one level in this thread
On June 27, 2000 at 06:21:50, blass uri wrote: >On June 26, 2000 at 21:03:42, Laurence Chen wrote: > >>On June 26, 2000 at 13:14:12, Terry Ripple wrote: >> >>>I'am looking for this in a program as i'll then have a better positional player >>>though maybe there is no answer for this. I would like to believe otherwise1 >>> >>>Regards, >>>Terry >>IMHO, it's Junior 5 or Junior 6. It knows how to shift pieces in closed >>positions to achieve a goal. However, I still believe that this is an area >>which chess engines need to improve a lot. >>Laurence > >I guess that Junior has evaluation function only for moves like other programs >and does not caculate goals to achieve like humans. > >I believe that thinking also in terms of goals is important for chess because >programs sometimes cannot see tactics because they do not think where they want >there pieces to be. > >Here is an example: > >[D]r1r5/BRp3pk/Q1P4p/3p1p2/3Pp2q/2P1Pb2/P4PP1/1R4K1 w - - 0 1 > >How much time do program needs to see that white is losing. > >white lost in the game after 27.Qf1 Re8 28.Bb8 Raxb8 29.Rxb8 Re6 30.Rf8 Rg6 >31.Rxf5 Rxg2+. > >There is nothing better than Rxf5 because the saving material move Rbb8 is >losing against the original plan Rg5 with the idea Rh5 and Qh1# > >How many programs know that the rook wants to be at h5? > >How many programs know that it is important to extend the lines when the rook >does the quiet moves Re8,Re6,Rg6,Rg5,Rh5 and knows also that Raxb8 is an >important move to extend because the white bishop is a defending piece? > >I believe that no program of today but I may be wrong about it. > >Uri Shredder 4 can find the rook lift after White plays 1. Qf1,( Pentium III 600e, 92 MB Hash Table). It takes chess engines to evaluate this position is positionally lost for White, and it takes a long time for a chess engine to avoid playing 1. gxf3?? 8 -> 0:02.01 -1.73 1...Qg4 2.R1b2 Bd1 3.c4 dxc4 4.Qxc4 Rcb8 5.Bxb8 Qxg2+ 6.Kxg2 (299.983) 148.8 9.01 0:03.33 -1.96 1...Qg4 2.R1b2 Qg6 3.R2b5 Qg4 4.Rxd5 Rd8 5.Rxd8 Qxg2+ 6.Qxg2 (496.330) 148.6 9.18 0:18.91 -1.95++ 1...Re8 2.gxf3 exf3 3.c4 Qg5+ 4.Kh1 Re4 5.R1b6 cxb6 6.Qe2 fxe2 (2.627.571) 138.8 9.18 0:24.08 -1.61 1...Re8 2.Bb8 Rxa2 3.Bxc7 Be2 4.Bh2 Bxf1 5.Rxg7+ Kxg7 (3.320.604) 137.8 9 -> 0:25.73 -1.61 1...Re8 2.Bb8 Rxa2 3.Bxc7 Be2 4.Bh2 Bxf1 5.Rxg7+ Kxg7 (3.555.974) 138.1 10.01 0:37.24 -1.36++ 1...Re8 2.Bb8 Raxb8 3.Rxb8 Re6 4.c4 Rg6 5.Rc1 dxc4 6.a3 Rxg2+ 7.Qxg2 Bxg2 8.Rxc4 (5.241.444) 140.7 10.01 0:50.76 -1.19 1...Re8 2.Rb8 Qg4 3.Rxa8 Rxa8 4.Rb7 Be2 5.Qe1 Bf3 6.g3 (7.250.313) 142.8 10 -> 0:52.45 -1.19 1...Re8 2.Rb8 Qg4 3.Rxa8 Rxa8 4.Rb7 Be2 5.Qe1 Bf3 6.g3 (7.514.175) 143.2 11.01 1:09.26 -0.96 1...Re8 2.Rb8 Qg4 3.R1b2 Rexb8 4.Bxb8 Qg6 5.Bxc7 Qxc6 6.Be5 Qxc3 (10.036.768) 144.8 11 -> 1:11.21 -0.96 1...Re8 2.Rb8 Qg4 3.R1b2 Rexb8 4.Bxb8 Qg6 5.Bxc7 Qxc6 6.Be5 Qxc3 (10.361.295) 145.4 12.01 1:41.37 -1.13 1...Re8 2.Rb8 Qg4 3.R1b2 f4 4.Rxe8 Rxe8 5.exf4 Re6 6.c4 Rxc6 7.Bc5 dxc4 (14.888.820) 146.8 12 -> 2:58.59 -1.13 1...Re8 2.Rb8 Qg4 3.R1b2 f4 4.Rxe8 Rxe8 5.exf4 Re6 6.c4 Rxc6 (25.718.595) 144.0 13.01 3:55.02 -0.88++ 1...Re8 2.Rb8 Qg4 3.R1b2 f4 4.Rxe8 Rxe8 5.exf4 Re6 6.c4 Rxc6 7.Bc5 dxc4 (33.966.169) 144.5 13.01 7:36.61 -0.38++ 1...Re8 2.Rb8 Re6 3.Rxa8 Rg6 4.Rbb8 Rxg2+ 5.Qxg2 Bxg2 6.Rb2 Qg4 (65.884.299) 144.2 13.01 11:34.00 -0.16 1...Re8 2.Bb8 Raxb8 3.Rxb8 Re6 4.Rf8 Rg6 5.Rbb8 Rxg2+ 6.Qxg2 Bxg2 (100.128.459) 144.2 13 -> 12:20.09 -0.16 1...Re8 2.Bb8 Raxb8 3.Rxb8 Re6 4.Rf8 Rg6 5.Rbb8 Rxg2+ 6.Qxg2 Bxg2 (106.798.977) 144.3
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