Author: Zappa
Date: 18:12:32 11/27/05
Go up one level in this thread
On November 27, 2005 at 19:30:20, K. Burcham wrote: > >This is a position that was posted by Chuck. Junior played this move in a game >against Shredder. Fruit takes over 34 minutes. > > [D] rnbqr1k1/pp3p1p/3b2p1/3p3Q/3P1N2/P2B4/1P3PPP/R1B2RK1 w - - 0 1 > >Fruit 2.2.1: > > >14.Qf3 Nc6 15.Be3 Qh4 16.Qg3 Qxg3 17.hxg3 Ne7 18.Bb5 Rf8 19.Rfe1 Bf5 20.Bd2 a6 >21.Be2 Rfc8 22.Rac1 g5 23.g4 Bxf4 24.Bxf4 gxf4 25.gxf5 Nxf5 > = (0.12) Depth: 19/51 00:23:50 1071292kN >14.Nxg6 fxg6 15.Bxg6 Bxh2+ 16.Kh1 Re7 17.Bd3 Bc7 18.Bg5 Qe8 19.Qh4 Re4 20.Bf4 >Bxf4 21.Bxe4 Qxe4 22.Qd8+ Kg7 23.Qxc8 Qe7 24.Kg1 Qd7 25.Qc5 > ² (0.31) Depth: 19/64 00:34:42 1570735kN >14.Nxg6 fxg6 15.Bxg6 Bxh2+ 16.Kh1 Re7 17.Bd3 Bd6 18.Qxd5+ Rf7 19.Bg5 Qf8 20.Bc4 >Nc6 21.Rfe1 Bd7 22.Bf4 Bxf4 23.Qxd7 Rd8 24.Bxf7+ Qxf7 25.Qg4+ Kh8 26.g3 Qd5+ >27.Kg1 > = (0.22) Depth: 20/64 00:47:10 2145982kN >14.Nxg6 fxg6 15.Bxg6 Bxh2+ 16.Kh1 Re7 17.Bd3 Bd6 18.Qxd5+ Rf7 19.Bg5 Qf8 20.Rfe1 >Nc6 21.Bc4 Bd7 22.Rac1 Rc8 23.Re4 Re8 24.Rxe8 Bxe8 25.Qe4 Kh8 26.Bxf7 Bxf7 > ² (0.42) Depth: 21/65 01:25:18 3936939kN >14.Nxg6 fxg6 15.Bxg6 Bxh2+ 16.Kh1 Re7 17.Bd3 Bd6 18.Qxd5+ Rf7 19.Bg5 Qf8 20.Rfe1 >Nc6 21.Bc4 Bd7 22.Rac1 Rc8 23.Kg1 Kg7 24.Qxf7+ Qxf7 25.Bxf7 Kxf7 26.d5 Ne5 >27.Rxc8 Bxc8 28.Re4 Bg4 > ² (0.47) Depth: 22/88 02:41:52 3192974kN >14.Nxg6 fxg6 15.Bxg6 Bxh2+ 16.Kh1 Re7 17.Bd3 Bd6 18.Qxd5+ Rf7 19.Bg5 Qf8 20.Rfe1 >Nc6 21.Bc4 Kg7 22.Qxf7+ Qxf7 23.Bxf7 Kxf7 24.d5 Ne5 25.Bf4 Kf6 26.Rac1 Bf5 >27.Re3 Re8 28.Kg1 Kf7 > ² (0.31) Depth: 23/88 05:03:07 1221095kN [D]rnbqr1k1/pp3p1p/3b2p1/3p3Q/3P1N2/P2B4/1P3PPP/R1B2RK1 w - - 0 1 A very interesting position! My gut feeling is that White can't win - he just doesn't have enough troops, and Zappa seems to agree. Here are the variations we worked out (possibly we missed something): Zappa and Fruit agree up until move 5, and here Zappa thinks it can see some advantage for White by playing to with the exchange: [D]rnbq2k1/pp2r2p/3b4/3p3Q/3P4/P2B4/1P3PP1/R1B2R1K w - - 4 5 1. Qh5-g5 Kg8-h8 2. Qg5-h4 Qd8-f8 3. Bc1-g5[S] Re7-g7 4. Bg5-f6 Kh8-g8 5. Bf6xg7 Nb8-c6[S] 6. Bg7xf8 Kg8xf8 7. Qh4xh7 Nc6xd4 8. Rf1-e1 Bc8-e6 9. Qh7xb7 Bd6xa3 = (0.66) Depth: 17/52 00:07:33.24 1225160kN (2703 KN/s, 180049 splits, 14143 aborts) But if I play Qh5 Kh8 Qh4 Qf8 Bg5 Rg7 Bf6 Kg8 Bxg7 Qxg7, then it starts to think it has overestimated the attack: [D]rnb3k1/pp4qp/3b4/3p4/3P3Q/P2B4/1P3PP1/R4R1K w - - 0 10 1. Qh4-d8 Qg7-f8 2. Qd8-g5 Kg8-h8 3. Ra1-e1 Bc8-d7[S] 4. Qg5-h5 Qf8-g7[S] 5. Bd3-f5[S] Nb8-c6 6. Bf5xd7[S] Qg7xd7[S] 7. Qh5xd5 Ra8-d8 8. Qd5-h5 Nc6xd4 9. Qh5-h4 Nd4-f5 10. Qh4-f6 Kh8-g8 11. Qf6-g5 Kg8-h8 12. Kh1-g1 = (0.07) Depth: 16/54 00:04:15.57 716691kN (2804 KN/s, 119521 splits, 8706 aborts) The other option is Fruit's Qxd5, and again Zappa doesn't think that White can do better than winning the Exchange: 1... Re7-f7 2. Bc1-g5 Qd8-f8 3. Rf1-e1 Nb8-c6 4. Bd3-c4 Kg8-g7 5. Qd5xf7 Qf8xf7 6. Bc4xf7 Kg7xf7 7. d4-d5 Nc6-e7 8. Bg5xe7 Bd6xe7 9. Ra1-d1 = (-0.05) Depth: 16/43 00:02:14.92 371975kN (2757 KN/s, 29449 splits, 2287 aborts) This is the same line Fruit wants, and Zappa concludes that Black is even better, with two bishops vs a rook and two pawns: [D]r1b5/pp3k1p/2nb4/6B1/3P4/P7/1P3PP1/R3R2K w - - 0 11 1. d4-d5 Nc6-d4 2. Ra1-c1 Bc8-f5 3. Bg5-e7 Bd6xe7 4. Rc1-c7 Nd4-e6 5. Rc7xb7 Kf7-f6 6. Kh1-g1 Bf5-g4 7. d5xe6 Bg4xe6 8. Re1-f1 = (-0.48) Depth: 16/31 00:00:23.58 82179kN (3485 KN/s, 7182 splits, 548 aborts) HIARCS' line looks better for White (who now has R+ 3 connected passers for the bishop pair) but its a deviation by Black, not White, so it still seems like Bxh2 should hold. Anyway, if I've missed something i'd love to see it pointed out. anthony
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