Author: Uri Blass
Date: 12:28:48 12/18/02
Go up one level in this thread
On December 18, 2002 at 15:16:56, Uri Blass wrote: >On December 18, 2002 at 14:10:04, Art Basham wrote: > >>In 1964 Tal played...Qd6...! >> >>I am wondering if any chess programs find it too... >> >>[D]rnb1k1nr/1p3pbp/p1p3p1/q3p3/2B1PB2/2N2N2/P1PQ1PPP/1R2R1K1 w - - 0 13 >> >>This is the actual position at move 13... >>Taken from the book, "Power Mates"... > >Based on Deep Fritz and Movei the problem has 3 parts: >1)Find Qd6 >2)avoid Qd6 >3)Find Qd6 again > >Deep Fritz finds it at depth 9 lose it at depth 10 and finds it again at depth >12. > >blass,u - Deep Fritz >[D]rnb1k1nr/1p3pbp/p1p3p1/q3p3/2B1PB2/2N2N2/P1PQ1PPP/1R2R1K1 w - - 0 1 > >Analysis by Deep Fritz: > >1.Bxe5-- > -+ (-1.53) Depth: 1/5 00:00:00 >1.Bg5 h6 > ² (0.38) Depth: 4/15 00:00:00 2kN >1.Bg5 h6 > ² (0.38) Depth: 4/15 00:00:00 2kN >1.Bg5 h6 > ² (0.38) Depth: 4/15 00:00:00 2kN >1.Bg5 h6 > ² (0.38) Depth: 4/15 00:00:00 2kN >1.Bg5 h6 > ² (0.38) Depth: 4/15 00:00:00 2kN >1.Bg5 h6 > ² (0.38) Depth: 4/15 00:00:00 2kN >1.Bg5 h6 > ² (0.38) Depth: 4/15 00:00:00 2kN >1.Bg5 h6 > ² (0.38) Depth: 4/15 00:00:00 2kN >1.Bg5 b5 2.Bb3 Bg4 3.Re3 > = (0.19) Depth: 5/23 00:00:00 22kN >1.Be3! > = (0.22) Depth: 5/23 00:00:00 23kN >1.Be3 b5 2.Red1 Bg4 3.Bg5 Nf6 > ² (0.34) Depth: 6/24 00:00:00 60kN >1.Be3 Nd7 2.Ng5 Nh6 3.Red1 b5 4.Bb3 > ² (0.44) Depth: 7/28 00:00:00 235kN >1.Be3 Nd7 2.Ng5 Nh6 3.Red1 b5 4.Bb3 f5 > ² (0.34) Depth: 8/25 00:00:00 435kN >1.Be3 Nd7 2.Ng5 Nh6 3.Red1 b5 4.Bb3 b4 5.Ne2 Kf8 > ² (0.41) Depth: 9/28 00:00:02 1290kN >1.Qd6! > ² (0.44) Depth: 9/29 00:00:04 2540kN >1.Qd6 f6 2.Bd2 Bf8 3.Qd3 Qc7 4.Red1 b5 5.Bb3 Bc5 > ² (0.28) Depth: 10/33 00:00:08 5634kN >1.Be3! > ² (0.31) Depth: 10/33 00:00:08 5835kN >1.Be3! Nd7 2.Ng5 Nh6 3.Qd6 Qd8 4.Red1 Bf8 5.Qd3 b6 > ² (0.47) Depth: 10/35 00:00:10 6689kN >1.Be3 Nd7 2.Ng5 Nh6 3.Qd6 Qd8 4.Red1 Bf8 5.Qd2 b5 6.Nf3 > ² (0.56) Depth: 11/33 00:00:17 11874kN >1.Be3 Nd7 2.Ng5 Nh6 3.Qd6 Qd8 4.Red1 Bf8 5.Qd2 b5 6.Nf3 f5 > ² (0.44) Depth: 12/33 00:00:39 27493kN >1.Qd6! > ² (0.47) Depth: 12/42 00:01:29 60438kN >1.Qd6! f6 2.Nxe5 fxe5 3.Red1 Bf6 4.Rxb7 Be7 5.Rxe7+ Nxe7 > ± (0.97) Depth: 12/42 00:01:50 74340kN >1.Qd6 f6 2.Nxe5 fxe5 3.Red1 Bf6 4.Rxb7 Be7 5.Rxe7+ Nxe7 6.Bg5 > ± (0.97) Depth: 13/39 00:03:05 128407kN >1.Qd6! > ± (1.28) Depth: 14/39 00:06:40 280950kN >1.Qd6! f6 2.Rxb7 Bxb7 3.Qe6+ Ne7 4.Qf7+ Kd8 5.Rd1+ Nd7 6.Qxg7 Re8 > +- (1.47) Depth: 14/44 00:09:40 404964kN > >(blass, tel-aviv 18.12.2002) > > >Latest Movei(not sure if the best movei) finds it at depth 10,lose it at depth >12 and finds it again at depth 13 >but it seems that the main line is wrong because after Qd6 f6 white should play >another sacrifice and movei does not see it in it's main line. > >depth=10 +0.19 d2d6 >Nodes: 16456479 NPS: 152163 >Time: 00:01:48.15 >depth=10 +0.37 d2d6 f7f6 f4d2 g7f8 d6d3 f8c5 c3e2 a5a3 d3a3 c5a3 >Nodes: 18365357 NPS: 150683 >Time: 00:02:01.88 >depth=11 +0.30 d2d6 f7f6 f4d2 g7f8 d6d3 a5c7 c4g8 h8g8 d3c4 c7f7 c4f7 e8f7 b1d1 >Nodes: 23189874 NPS: 149188 >Time: 00:02:35.44 >depth=11 +0.30 d2d6 f7f6 f4d2 g7f8 d6d3 a5c7 c4g8 h8g8 d3c4 c7f7 c4f7 e8f7 b1d1 >Nodes: 38536328 NPS: 150591 >Time: 00:04:15.90 >depth=12 +0.12 d2d6 f7f6 f4d2 g7f8 c3e2 a5a4 d6c7 g8e7 c4b3 a4e4 d2a5 b7b6 a5b6 >Nodes: 49354060 NPS: 149385 >Time: 00:05:30.38 >depth=12 +0.35 f4e3 b8d7 f3g5 g8h6 c3d5 a5d2 d5c7 e8e7 e3d2 a8a7 d2b4 c6c5 c7d5 >e7e8 b4a5 b7b5 >Nodes: 57232504 NPS: 148159 >Time: 00:06:26.29 >depth=12 +0.35 f4e3 b8d7 f3g5 g8h6 c3d5 a5d2 d5c7 e8e7 e3d2 a8a7 d2b4 c6c5 c7d5 >e7e8 b4a5 b7b5 >Nodes: 108530400 NPS: 149819 >Time: 00:12:04.41 >depth=13 +0.22 f4e3 b8d7 f3g5 g8h6 c3d5 a5d8 d5b6 d7b6 d2d8 e8d8 b1b6 d8e8 e3c5 >g7f8 c5e3 >Nodes: 122312239 NPS: 149365 >Time: 00:13:38.88 >depth=13 +0.23 d2d6 >Nodes: 167395279 NPS: 149572 >Time: 00:18:39.16 >depth=13 +0.24 d2d6 f7f6 f4d2 g7f8 d6d3 a5c7 c4g8 h8g8 d3c4 g8g7 d2h6 g7f7 h6e3 >Nodes: 194160978 NPS: 149540 >Time: 00:21:38.38 latest movei did not solve it at depth 13 because it changed it's mind to Ng5 depth=13 +0.44 f3g5 g8h6 d2d6 a5d8 d6d8 e8d8 f4e3 d8e7 a2a4 b8d7 a4a5 e7e8 e1d1 f7f5 g5e6 Nodes: 404037011 NPS: 145584 Time: 00:46:15.27 I hope that it can solve it at depth 14. Uri
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