Author: Uri Blass
Date: 13:09:53 12/18/02
Go up one level in this thread
On December 18, 2002 at 15:28:48, Uri Blass wrote: >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 It seems that it can do it At depth 14 Ng5 fails low and Qd6 fails high so after more than an hour movei on p850 finds Qd6 14 10 431434 618877912 f3g5 g8h6 d2d6 a5d8 d6d8 e8d8 f4e3 d8e8 e1d1 b8d7 f2f3 d7f6 b1b6 g7f8 a2a4 f8a3 14 11 463631 665602663 d2d6 14 40 495774 710467678 d2d6 Uri
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