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Subject: Re: WAC surprise

Author: Ernst Walet

Date: 12:38:49 04/21/05

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On April 21, 2005 at 13:30:46, Dann Corbit wrote:

>76) Qxh7+; id "WAC.185"
>    Searching move: Qh5xh7
>    Best move (Shredder 7.04 UCI): Nh4-g6
>    Not found in: 10:00
>     2/4	00:00	         143	0	-2.31	Qh5g4 Be8d7
>     3/8	00:00	         612	0	-2.23	Qh5g4 Kg8h8 Rh3g3
>     4/9+	00:00	       2.324	0	-1.98	Qh5g4 Kg8h8 Nh4g6+ Be8xg6 f5xg6 Qd6e6
>     4/10	00:00	       3.163	0	-1.92	Qh5g4 a6a5 Bc1h6 Qd6e7
>     5/15	00:00	       6.804	453.600	-2.06	Qh5g4 a6a5 Bc1h6 Qd6d7 Rh3g3
>     5/15+	00:00	       7.980	532.000	-2.05	Nh4g6 Be8xg6 f5xg6 Qd6e6
>     5/15+	00:00	       8.475	565.000	-1.70	Nh4g6 Be8xg6 f5xg6 Bd4c3
>     5/18	00:00	       9.615	641.000	-1.47	Nh4g6 Be8xg6 f5xg6 h7h6 Qh5f5 Kg8h8
>     6/16+	00:00	      20.144	649.806	-1.22	Nh4g6 Be8xg6 f5xg6 h7xg6 Qh5xg6
>Qd6c5 Bc1h6 Rd8xd5 Bb3xd5+ Qc5xd5
>     6/16	00:00	      21.984	477.913	-1.19	Nh4g6 Be8xg6 f5xg6 h7h6 Bc1xh6 Bd4xb2
>Bh6d2 Kg8f8
>     7/16+	00:00	      35.850	459.615	-0.94	Nh4g6 Be8xg6 f5xg6 h7h6 Bc1xh6 Qd6d7
>Bh6d2 Bd4xb2 Qh5h8+
>     7/17	00:00	      45.803	492.505	-0.80	Nh4g6 h7h6 Bc1xh6 g7xh6 Qh5xh6 Rd8d7
>Qh6h8+ Kg8f7
>     7/17+	00:00	      49.006	526.946	-0.76	Qh5xh7+ Kg8f8
>     7/17+	00:00	      50.005	537.688	-0.41	Qh5xh7+ Kg8f8 Nh4g6+ Be8xg6 Qh7xg6
>Qd6xd5 Bb3xd5
>     7/22	00:00	     103.498	553.465	+5.86	Qh5xh7+ Kg8f8 Qh7h8+ Kf8e7 Qh8xg7+
>Be8f7 Nh4g6+ Ke7d7 Qg7xf7+ Kd7c8 Ng6e7+ Kc8b7 Ne7c6 Rd8d7
>     8/25	00:00	     173.336	585.594	+5.86	Qh5xh7+ Kg8f8 Qh7h8+ Kf8e7 Qh8xg7+
>Be8f7 Nh4g6+ Ke7d7 Qg7xf7+ Kd7c8 Bb3c4 Kc8b7 Rh3h7 Rb8c8 Ng6e7
>     9/28	00:00	     333.155	610.173	+5.94	Qh5xh7+ Kg8f8 Qh7h8+ Kf8e7 Qh8xg7+
>Be8f7 Nh4g6+ Ke7d7 Qg7xf7+ Kd7c8 Bb3c4 Kc8b7 Rh3h7 Rd8g8 b2b3 Rb8c8
>    10/29+	00:01	     583.601	612.383	+6.19	Qh5xh7+ Kg8f8 Qh7h8+ Kf8e7 Qh8xg7+
>Be8f7 Nh4g6+ Ke7d7 Qg7xf7+ Kd7c8 Ng6e7+ Kc8b7 Ne7c6 Rd8f8 Qf7e6 Rf8g8 Nc6xb8
>Kb7xb8
>    10/29	00:01	     802.883	611.953	+6.49	Qh5xh7+ Kg8f8 Qh7h8+ Kf8e7 Qh8xg7+
>Be8f7 Nh4g6+ Ke7d7 Qg7xf7+ Kd7c8 Ng6e7+ Kc8b7 Ne7c6 Rd8d7 Qf7e6 Rb8a8 Qe6xd6
>Rd7xd6 Nc6xb4
>    11/30	00:03	   1.745.154	617.098	+6.50	Qh5xh7+ Kg8f8 Qh7h8+ Kf8e7 Qh8xg7+
>Be8f7 Nh4g6+ Ke7d7 Qg7xf7+ Kd7c8 Ng6e7+ Kc8b7 Ne7c6 Rd8d7 Qf7g6 Rb8c8 Bc1d2 a6a5
>Nc6xa5+ Kb7b8
>    12/32	00:07	   4.230.181	632.597	+6.45	Qh5xh7+ Kg8f8 Qh7h8+ Kf8e7 Qh8xg7+
>Be8f7 Nh4g6+ Ke7d7 Qg7xf7+ Kd7c8 Ng6e7+ Kc8b7 Ne7c6 Rd8f8 Qf7e6 Rb8e8 Qe6xd6
>c7xd6 Bc1d2 Bd4c5 Rh3h7+ Kb7b6
>    13/34	00:11	   7.218.295	646.163	+6.59	Qh5xh7+ Kg8f8 Qh7h8+ Kf8e7 Qh8xg7+
>Be8f7 Nh4g6+ Ke7d7 Qg7xf7+ Kd7c8 Ng6e7+ Kc8b7 Ne7c6 Rd8f8 Qf7e6 Rb8e8 Qe6xd6
>c7xd6 Rh3h7+ Kb7b6 a4a5+ Kb6b5 Rh7b7+ Kb5c5 Nc6xb4
>    14/38	00:20	  12.820.890	646.605	+6.82	Qh5xh7+ Kg8f8 Qh7h8+ Kf8e7 Qh8xg7+
>Be8f7 Nh4g6+ Ke7d7 Qg7xf7+ Kd7c8 Ng6e7+ Kc8b7 Ne7c6 Rd8d7 Qf7e6 Rb8a8 Nc6a5+
>Kb7b8 Na5c4 Bd4xb2 Nc4xb2 Qd6xe6 d5xe6
>    15/42	01:02	  38.818.569	626.267	+6.80	Qh5xh7+ Kg8f8 Qh7h8+ Kf8e7 Qh8xg7+
>Be8f7 Nh4g6+ Ke7d7 Qg7xf7+ Kd7c8 Ng6e7+ Kc8b7 Ne7c6 Rd8d7 Qf7e6 Rb8f8 Bc1d2
>Bd4c5 Bb3c4 Rf8c8 b2b3
>    16/43	02:25	  89.155.531	614.670	+6.98	Qh5xh7+ Kg8f8 Qh7h8+ Kf8e7 Qh8xg7+
>Be8f7 Nh4g6+ Ke7d7 Qg7xf7+ Kd7c8 Ng6e7+ Kc8b7 Ne7c6 Rd8f8 Qf7e6 Qd6c5 Bc1d2
>Rb8e8 Qe6d7 a6a5 Rh3h7 Re8c8 Bd2h6
>    17/49	06:11	 225.643.290	608.690	+7.09	Qh5xh7+ Kg8f8 Qh7h8+ Kf8e7 Qh8xg7+
>Be8f7 Nh4g6+ Ke7d7 Qg7xf7+ Kd7c8 Ng6e7+ Kc8b7 Ne7c6 Rd8d7 Qf7e6 Rb8a8 Nc6a5+
>Kb7a7 Bc1d2 Rd7g7 Na5c6+ Ka7b6 Bd2xb4
>    17/49+	09:09	 323.994.178	590.406	+7.10	Nh4g6 Be8d7 Qh5xh7+ Kg8f7 Rh3g3
>Bd7xf5 Ng6xe5+ Kf7e8 Qh7h5+ g7g6 Rg3xg6 Qd6xe5 Rg6g7+ Bf5g6 Qh5xg6+ Ke8f8 Bc1h6
>   4/21/2005 2:57:18 AM, Time for this analysis: 00:10:00, Rated time: 12:11
>
>Certainly worth a nice deep search to be sure which is better.  At any rate, we
>clearly have a new solution as +7 pawns is going to be pretty hard to overcome,
>I think.

Well, it took a while to resolve the fail high, but Ng6 is a far better move it
seems. CPU is P-M 735.

Ernst.


1r1rb1k1/2p3pp/p2q1p2/3PpP1Q/Pp1bP2N/1B5R/1P4PP/2B4K w - -

Engine: Shredder 9 UCI (500 MB)
gemaakt door Stefan Meyer-Kahlen

10/28  0:00   +6.35++  1.Dxh7+ Kf8 (471.405) 581

10/29  0:01   +6.35    1.Dxh7+ Kf8 2.Dh8+ Ke7 3.Dxg7+ Lf7
                       4.Pg6+ Kd7 5.Dxf7+ Kc8 6.Th7 Kb7 (728.884) 601

11/30  0:01   +6.10--  1.Dxh7+ Kf8 (1.170.737) 618

11/30  0:01   +6.10    1.Dxh7+ Kf8 2.Dh8+ Ke7 3.Dxg7+ Lf7
                       4.Pg6+ Kd7 5.Dxf7+ Kc8 6.Th7 Kb7
                       7.Lc4 La7 8.De6 (1.198.336) 607

12/34  0:03   +6.13    1.Dxh7+ Kf8 2.Dh8+ Ke7 3.Dxg7+ Lf7
                       4.Pg6+ Kd7 5.Dxf7+ Kc8 6.Th7 Kb7
                       7.Lc4 La7 8.De6 Db6 9.Dxb6+ Lxb6
                       10.Tf7 Td6 (2.141.197) 621

13/34  0:04   +6.38++  1.Dxh7+ Kf8 (2.529.186) 614

13/38  0:05   +6.56    1.Dxh7+ Kf8 2.Dh8+ Ke7 3.Dxg7+ Lf7
                       4.Pg6+ Kd7 5.Dxf7+ Kc8 6.Pe7+ Kb7
                       7.Pc6 Tf8 8.De6 Tbe8 9.Dxd6 cxd6
                       10.Th7+ Kb6 11.a5+ Kb5 12.Tb7+ Kc5
                       13.Pxb4 (3.444.523) 630

14/40  0:08   +6.80    1.Dxh7+ Kf8 2.Dh8+ Ke7 3.Dxg7+ Lf7
                       4.Pg6+ Kd7 5.Dxf7+ Kc8 6.Pe7+ Kb7
                       7.Pc6 Td7 8.Dg6 Tf8 (5.308.611) 637

15/39  0:15   +6.78    1.Dxh7+ Kf8 2.Dh8+ Ke7 3.Dxg7+ Lf7
                       4.Pg6+ Kd7 5.Dxf7+ Kc8 6.Pe7+ Kb7
                       7.Pc6 Td7 8.Dg6 Ta8 9.Pa5+ Ka7
                       10.Ld2 c5 11.dxc6 Te7 12.Th7 Lxb2
                       13.Le3+ Ld4 (9.898.333) 650

16/44  0:28   +7.02    1.Dxh7+ Kf8 2.Dh8+ Ke7 3.Dxg7+ Lf7
                       4.Pg6+ Kd7 5.Dxf7+ Kc8 6.Pe7+ Kb7
                       7.Pc6 Td7 8.Dg6 Ta8 9.Pa5+ Ka7
                       10.Ld2 Lc5 11.Pc6+ Kb7 12.Th7 Txh7
                       13.Dxh7 a5 14.Lc4 (18.920.687) 658

17/42  0:52   +7.04    1.Dxh7+ Kf8 2.Dh8+ Ke7 3.Dxg7+ Lf7
                       4.Pg6+ Kd7 5.Dxf7+ Kc8 6.Pe7+ Kb7
                       7.Pc6 Td7 8.Dg6 Tc8 9.Ld2 Lc5 10.Th7 Txh7
                       11.Dxh7 Dxc6 (34.364.327) 656

18/46  2:34   +7.15    1.Dxh7+ Kf8 2.Dh8+ Ke7 3.Dxg7+ Lf7
                       4.Pg6+ Kd7 5.Dxf7+ Kc8 6.Pe7+ Kb7
                       7.Pc6 Tf8 8.De6 Tbe8 9.Dxd6 cxd6
                       10.Th7+ Kb6 11.a5+ Kc5 12.Tb7 (96.640.609) 625

18/48  5:17   +7.16++  1.Pg6 (190.203.902) 599

18/48  5:53   +7.51++  1.Pg6 (209.190.161) 591

18/54  56:09  +11.30   1.Pg6 Lxg6 2.fxg6 Kf8 3.gxh7 Ke7
                       4.Dg6 Db6 5.Dxg7+ Kd6 6.Th6 Kc5
                       7.Txf6 (1.923.433.625) 570

beste zet: Ph4-g6  tijd: 56:28.362 min  n/s: 570.440  CPU 98.9%   n/s(1CPU):
576.784   nodes: 1.932.414.017



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