Author: Moritz Berger
Date: 11:41:58 10/17/98
Go up one level in this thread
Junior 5 doesn't find the thematical Karlsbad moves (analysis in the quoted text). It finds b4 in position 2b) but discards it after a while. All times Junior 5.0 on PII-450 128MB HT. Moritz ¤º°`°º¤ø,¸¸,ø¤º°`°º¤ø¤º°`°º¤ø,¸¸,ø¤º°`°º¤øø¤º°`°º¤¤º°`°º¤ø,¸¸ On October 17, 1998 at 13:25:20, Dirk Frickenschmidt wrote: > >Years ago I wondered why only very few of the dedicated computers were able to >play a so-called minority attack: this is a combined pawns and pieces attack >against the so-called Karlsbad pawn structure a7b7c6d5, most commonly known from >the Queen's Gambit Declined, exchange variation (examples of the below), but >also occuring elsewhere. It often is a useful attacking weapon to push the white >b-pawn to b5 to threaten to give black a hanging pawn on c6 and play on this and >the black squares (c5 etc) and the b-file (possibly 6th/7th row)afterwards. > >When after a long time I now checked two fundamental test positions, still >within the opening, with some newer programs (on MMX200 at tournament time), I >was surprised to see that not much seems to have changed: many of the programs >still play nonsense moves like Rac1 or even Rfc1 to get an half-open c-file, >which is of no big use for them. > >My question is, which of the newer programs are able to play minority attacks, >without getting the usual moves from their opening books (so you will have to >turn opening books of in my test positions)? > >Here are the two positions: > >Position 1 [D36] (Instructive sample game: Ftacnik-Ivanchuk, Moscow 1994, with a >draw but quite interesting possible variations on both sides) >1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.cxd5 exd5 5.Bg5 c6 6.Qc2 Be7 7.e3 Nbd7 8.Bd3 0-0 >9.Nf3 Re8 10.0-0 Nf8, and which program will play >a) 11.Rab1 and after g6 Karlsbad 1 r1bqrnk1/pp2bppp/2p2n2/3p2B1/3P4/2NBPN2/PPQ2PPP/R4RK1 w - - 0 1 Analysis by Junior 5.0: 11.Bf4 Bg4 ² (0.37) depth: 3 00:00:00 0kN 11.Bf4 Ne6 12.Bg3 = (0.19) depth: 6 00:00:00 1kN 11.Ne5 Ng6 12.Rac1 Nxe5 ² (0.33) depth: 6 00:00:00 2kN 11.Ne5 Ng6 12.Rac1 Nxe5 ² (0.33) depth: 6 00:00:00 6kN 11.Ne5 Bd6 12.Bf4 Ng4 13.Nxg4 Bxg4 14.Bxd6 Qxd6 = (0.14) depth: 9 00:00:00 46kN 11.a4 Ng6 12.Rfc1 Qd6 13.b3 = (0.23) depth: 9 00:00:01 74kN 11.Rac1 Ng6 12.Ne5 Qd6 ² (0.27) depth: 9 00:00:01 144kN 11.Rac1 Ng6 12.Ne5 Qd6 ² (0.27) depth: 9 00:00:01 158kN 11.Rac1 Ng6 12.Ne5 Bd6 13.Nxg6 hxg6 14.a4 Bg4 = (0.20) depth: 12 00:00:01 360kN 11.Rfc1 Ng6 12.a4 Qd6 = (0.21) depth: 12 00:00:04 1419kN 11.Rfc1 Ng6 12.a4 Qd6 = (0.21) depth: 12 00:00:04 1534kN 11.Rfc1 Ng6 12.Ne5 Bd6 13.f4 a5 14.Qd1 Bd7 = (0.19) depth: 15 00:00:13 4823kN 11.Ne5 Bd6 12.f4 h6 13.Bh4 Qb6 14.Rae1 Ng4 15.h3 Bxe5 16.fxe5 = (0.21) depth: 15 00:00:45 16411kN 11.Ne5 Bd6 12.f4 h6 13.Bh4 Qb6 14.Rae1 Ng4 15.h3 Bxe5 16.fxe5 = (0.21) depth: 15 00:00:56 20055kN 11.Ne5 Bd6 12.f4 h6 13.Bh4 Be7 14.Qd1 Qc7 15.f5 Ne4 = (0.14) depth: 17 00:01:56 40146kN 11.Ne5 Bd6 12.f4 h6 13.Bh4 Be7 14.Qd1 Qc7 15.f5 Ne4 = (0.14) depth: 17 00:04:23 90510kN 11.Ne5 Bd6 12.f4 Ng6 13.Rac1 Qb6 14.Na4 Qc7 15.h3 Nd7 16.Nc3 = (0.14) depth: 18 00:06:44 137914kN 11.Ne5 Bd6 12.f4 Ng6 13.Rac1 Qb6 14.Na4 Qc7 15.h3 Nd7 16.Nc3 = (0.14) depth: 18 00:12:01 244053kN 11.Ne5 Ng6 12.Rac1 Nd7 13.Bxe7 Qxe7 14.Nxg6 hxg6 15.a3 Qh4 16.Qd1 a5 = (0.13) depth: 19 00:18:42 376097kN >b) 12.b4 r1bqrnk1/pp2bp1p/2p2np1/3p2B1/3P4/2NBPN2/PPQ2PPP/1R3RK1 w - - 0 1 Analysis by Junior 5.0: 12.Bh6 Bg4 ² (0.50) depth: 3 00:00:00 0kN 12.Bh6 Ng4 13.Bf4 g5 14.Be5 Nxe5 ² (0.31) depth: 6 00:00:00 1kN 12.Ne5 N8d7 13.Bh6 Nxe5 ² (0.49) depth: 6 00:00:00 3kN 12.Rbc1 Bg4 13.Bh6 ² (0.51) depth: 6 00:00:00 5kN 12.Rbc1 Bg4 13.Bh6 ² (0.51) depth: 6 00:00:00 6kN 12.Rbc1 Ne6 13.Qd1 Nxg5 14.Nxg5 Bg4 ² (0.32) depth: 9 00:00:00 17kN 12.b4 Ne6 13.Rfc1 Nxg5 14.Nxg5 Bg4 ² (0.35) depth: 9 00:00:00 77kN 12.h3 Ne6 13.Bh6 Bd7 14.Ne5 ² (0.41) depth: 9 00:00:00 95kN 12.h3 Ne6 13.Bh6 Bd7 14.Ne5 ² (0.41) depth: 9 00:00:01 132kN 12.h3 Ne6 13.Bh6 Qc7 14.Ne5 c5 ² (0.44) depth: 12 00:00:01 326kN 12.h3 Ne6 13.Bh6 Qc7 14.Ne5 c5 ² (0.44) depth: 12 00:00:03 914kN 12.h3 Ne6 13.Bh6 Bd6 14.Rbc1 Qc7 15.Qd1 Bd7 ² (0.38) depth: 15 00:00:06 2148kN 12.h3 Ne6 13.Bh6 Bd6 14.Rbc1 Qc7 15.Qd1 Bd7 ² (0.38) depth: 15 00:00:31 10389kN 12.h3 Ne6 13.Bh6 a5 14.a3 Qc7 15.Rfc1 Bd6 16.Qd1 ² (0.40) depth: 17 00:00:49 16299kN 12.h3 Ne6 13.Bh6 a5 14.a3 Qc7 15.Rfc1 Bd6 16.Qd1 ² (0.40) depth: 17 00:02:11 40959kN >by itself? > >Position 2 [D36] (Instructive sample game: Smyslow-Keres, WCh18 1948) >1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 c6 5.e3 Nbd7 6.cxd5 exd5 7.Bd3 Be7 8.Nf3 0-0 >9.Qc2 Re8 10.0-0 Nf8 Again, which program plays >a) 11.Rab1 and after Ng6 r1bqrnk1/pp2bppp/2p2n2/3p2B1/3P4/2NBPN2/PPQ2PPP/R4RK1 w - - 0 1 Analysis by Junior 5.0: 11.Bf4 Bg4 ² (0.37) depth: 3 00:00:00 0kN 11.Bf4 Ne6 12.Bg3 = (0.19) depth: 6 00:00:00 1kN 11.Ne5 Ng6 12.Rac1 Nxe5 ² (0.33) depth: 6 00:00:00 2kN 11.Ne5 Ng6 12.Rac1 Nxe5 ² (0.33) depth: 6 00:00:00 6kN 11.Ne5 Bd6 12.Bf4 Ng4 13.Nxg4 Bxg4 14.Bxd6 Qxd6 = (0.14) depth: 9 00:00:00 46kN 11.a4 Ng6 12.Rfc1 Qd6 13.b3 = (0.23) depth: 9 00:00:00 74kN 11.Rac1 Ng6 12.Ne5 Qd6 ² (0.27) depth: 9 00:00:01 144kN 11.Rac1 Ng6 12.Ne5 Qd6 ² (0.27) depth: 9 00:00:01 158kN 11.Rac1 Ng6 12.Ne5 Bd6 13.Nxg6 hxg6 14.a4 Bg4 = (0.20) depth: 12 00:00:01 360kN 11.Rfc1 Ng6 12.a4 Qd6 = (0.21) depth: 12 00:00:04 1419kN 11.Rfc1 Ng6 12.a4 Qd6 = (0.21) depth: 12 00:00:04 1534kN 11.Rfc1 Ng6 12.Ne5 Bd6 13.f4 a5 14.Qd1 Bd7 = (0.19) depth: 15 00:00:13 4823kN 11.Ne5 Bd6 12.f4 h6 13.Bh4 Qb6 14.Rae1 Ng4 15.h3 Bxe5 16.fxe5 = (0.21) depth: 15 00:00:45 16411kN 11.Ne5 Bd6 12.f4 h6 13.Bh4 Qb6 14.Rae1 Ng4 15.h3 Bxe5 16.fxe5 = (0.21) depth: 15 00:00:56 20055kN 11.Ne5 Bd6 12.f4 h6 13.Bh4 Be7 14.Qd1 Qc7 15.f5 Ne4 = (0.14) depth: 17 00:01:56 40146kN 11.Ne5 Bd6 12.f4 h6 13.Bh4 Be7 14.Qd1 Qc7 15.f5 Ne4 = (0.14) depth: 17 00:04:23 90510kN 11.Ne5 Bd6 12.f4 Ng6 13.Rac1 Qb6 14.Na4 Qc7 15.h3 Nd7 16.Nc3 = (0.14) depth: 18 00:06:44 137914kN >b) 12.b4 >by itself? r1bqr1k1/pp2bppp/2p2nn1/3p2B1/3P4/2NBPN2/PPQ2PPP/1R3RK1 w - - 0 1 Analysis by Junior 5.0: 12.Rbc1 Bg4 = (0.12) depth: 3 00:00:00 0kN 12.Rbc1 Bg4 13.Ne5 Nxe5 = (0.08) depth: 6 00:00:00 1kN 12.Rbc1 Bg4 13.Ne5 Nxe5 = (0.08) depth: 6 00:00:00 7kN 12.Rbc1 Be6 13.Ne5 Qd6 14.Nxg6 hxg6 = (0.06) depth: 9 00:00:00 41kN 12.Rbc1 Be6 13.Ne5 Qd6 14.Nxg6 hxg6 = (0.06) depth: 9 00:00:01 186kN 12.Rbc1 Qd6 13.Bxg6 hxg6 14.Bf4 Qd8 15.Qb3 Ng4 = (0.02) depth: 12 00:00:01 552kN 12.Ne5 Nh5 13.Bxe7 Qxe7 14.Nf3 Bg4 15.Bxg6 hxg6 16.Ne5 = (0.08) depth: 12 00:00:04 1416kN 12.b4 a6 13.a4 Qb6 14.a5 Qc7 15.Rfc1 = (0.10) depth: 12 00:00:06 2237kN 12.b4 a6 13.a4 Qb6 14.a5 Qc7 15.Rfc1 = (0.10) depth: 12 00:00:08 3098kN 12.b4 a6 13.Ne5 Bd6 14.f4 Qe7 15.a3 Bg4 = (0.10) depth: 14 00:00:12 4803kN 12.b4 a6 13.Ne5 Bd6 14.f4 Qe7 15.a3 Bg4 = (0.10) depth: 14 00:00:36 14142kN 12.b4 a6 13.a4 Be6 14.Rfc1 Qb6 15.Qb3 Qc7 = (0.09) depth: 16 00:00:57 22031kN 12.b4 a6 13.a4 Be6 14.Rfc1 Qb6 15.Qb3 Qc7 = (0.09) depth: 16 00:02:22 53046kN 12.b4 a6 13.a4 Be6 14.Ne5 Bd6 15.Rfc1 Nxe5 16.dxe5 Bxe5 17.Bxh7+ Kh8 = (0.07) depth: 17 00:03:11 70387kN 12.Rbc1 a5 13.Ne5 Bd6 14.f4 Be7 15.Qd1 Nxe5 16.fxe5 Bg4 17.Be2 Ne4 = (0.08) depth: 17 00:06:51 148281kN
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