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Subject: Re: Testposition:12..Nxe5, 12..Nc6, or 12..Bc5?.........Nxe5

Author: Rob Basham

Date: 08:20:49 03/29/05

Go up one level in this thread


On March 29, 2005 at 09:54:47, Eelco de Groot wrote:

>Hello everybody, I am having some difficulty interpreting this position. Is
>12.Nxe5 the only move? Is White winning regardless? Should I throw away my
>latest settings for Pro Deo?
>
>[D]rnbq1rk1/pp1n1p1p/4p1p1/3pP1NP/1b3P2/1PpB4/P1P3P1/R1BQK2R b KQ - 0 1
>
>
>I had some slightly conflicting search results in the position I gave in my last
>post http://www.talkchess.com/forums/1/message.html?418597. That only makes it a
>more interesting position I think.
>
>Pro Deo 1.1 Betazoid T6c met [Queen Value = 95]
>
>01:11:50.6	0,00	13	566269012	Nxe5 fxe5 Qc7 Qe2
>01:30:45.5	0,01	13	721163232	Nc6 hxg6 fxg6 Nxh7 Qe8 Rh6
>
>
>Pro Deo 1.1 Betazoid T6e2
>
>02:29:01.0	0,28	13	1232946950	Nc6 Nxh7 g5 h6 Kh8 Nxf8 Qxf8
>05:42:39.8	0,39	14	-1368052790	Nc6 Nxh7 g5 Qg4
>
>S&D 6_7e3 Pro Deo 1.1 surprisingly to the point. I expected many switches not to
>be working anymore. But overall this search seems good, in this postion at
>least.
>
>
>00:00:00.5	1,88	1	26	gxh5 Bxh7+ Kh8 Qxh5
>00:00:00.5	3,72	1	28	Nc6
>00:00:00.5	3,80	1	48	Qb6
>00:00:00.5	2,82	2	163	Qb6 hxg6 hxg6
>00:00:00.5	2,90	2	242	Bc5 hxg6 hxg6
>00:00:00.6	3,23	2	820	h6 a3
>00:00:00.6	3,44	3	1627	h6 Nf3 gxh5 Rxh5
>00:00:00.6	3,27	4	6174	h6 Nxf7 Kxf7 Qg4 Nxe5 hxg6+
>00:00:00.8	2,85	5	17265	h6 hxg6 hxg5 g7 Kxg7 a3
>00:00:00.8	3,26	5	28615	Be7 hxg6 hxg6 Nf3 Nc5 Bb5
>00:00:01.1	3,31	6	61197	Be7 hxg6 hxg6 Nf3 Nc5 Qe2 Bd7
>00:00:06.4	2,05	7	729200	Be7 Nxh7 Bh4+ Kf1 Kxh7 hxg6+ Kg7 Qh5
>00:00:14.8	2,34	8	1808764	Be7 Nxh7 Bh4+ Kf1 Kxh7 hxg6+ Kg7 gxf7 Nxe5 Qh5 Nxd3
>00:00:18.8	1,57	9	2339553	Be7 Nxh7 Bh4+ Kf1 Kxh7 Qg4 Kg8 Rxh4 g5
>00:00:57.6	0,98	10	7808043	Be7 Nxh7 Bh4+ Kf1 Kxh7 Qg4 Kg8 Rxh4 g5 Ba3
>00:04:50.4	0,46	11	40080820	Be7 hxg6 fxg6 Bxg6 Bxg5 Bxh7+ Kg7 Qh5 Qe7 g3 Nc6
>00:07:36.5	0,71	11	65032803	Nc6 Nxh7 Be7 Kf1
>00:09:25.8	0,87	11	81944119	Nxe5 fxe5 Qc7 Qe2 f6 exf6
>00:17:53.7	0,50	12	161369733	Nxe5 fxe5 Qc7 Qg4
>00:21:28.3	0,58	12	194454123	Nc6 Nxh7 Bc5 Nxf8 Nxf8 hxg6
>01:07:52.3	0,21	13	616796324	Nc6 hxg6 fxg6 Nxh7 Bc5 Bxg6
>01:42:37.6	0,32	13	938572412	Bc5 hxg6 fxg6 Nxh7 Rf7 Ng5
>04:17:13.5	0,06	14	-1940861402	Bc5 hxg6 hxg6 Qg4
>
>Assuming this is anywhere near correct than 12.Nxe5, 12.Nc6 and 12.Bc5 all have
>chances to draw. If anyone thinks this is wrong, please tell me.
>
>This is Pro Deo 1.1 Betazoid T8:
>
>00:00:06.6	1,83	1	26	gxh5 Bxh7+ Kh8 Qxh5
>00:00:06.6	3,71	1	28	Nc6
>00:00:06.6	3,78	1	48	Qb6
>00:00:06.6	2,76	2	194	Qb6 hxg6 hxg6
>00:00:06.6	2,86	2	302	Bc5 hxg6 hxg6
>00:00:06.7	3,14	2	975	h6 a3
>00:00:06.7	3,35	3	1855	h6 Nf3 gxh5 Rxh5
>00:00:06.7	3,14	4	7234	h6 Nxf7 Kxf7 Qg4 g5 fxg5
>00:00:06.8	0,94	5	24379	h6 hxg6 Nxe5 fxe5 hxg5 g7 Kxg7
>00:00:07.0	1,86	5	40058	Bc5 Nxh7 Nxe5 Nxf8 Nxd3+ Qxd3
>00:00:07.0	2,30	5	48036	Qb6 hxg6 hxg6 Qe2 Nc6 Be3
>00:00:07.1	2,34	5	55190	Nc5 hxg6 hxg6 Rh7 Nxd3+ Qxd3 Qxg5 Rg7+
>00:00:07.2	2,44	5	63386	Nc6 Nxh7 Ncxe5 Nxf8 Nxd3+ Qxd3
>00:00:07.4	2,98	5	71112	Be7 hxg6 hxg6 Nf3 Qb6 a4
>00:00:07.9	3,25	6	95267	Be7 hxg6 hxg6 Nf3 Qb6 a3 Nc6
>00:00:10.2	2,32	7	359126	Be7 Nxh7 Bh4+ Kf1 Kxh7 hxg6+ Kg7 gxf7 Nxe5 Qh5 Nxd3
>Rxh4 Nxc1
>00:00:16.2	1,81	8	1014106	Be7 Nxh7 Bh4+ Kf1 Kxh7 hxg6+ Kg7 g3 Nxe5 Rxh4
>00:00:37.4	1,51	9	3491866	Be7 Nxh7 Bh4+ Kf1 Kxh7 Qg4 Kg8 Rxh4 g5
>00:02:05.6	0,39	10	14867230	Be7 hxg6 fxg6 Bxg6 Bxg5 Bxh7+ Kg7 Be3
>00:03:05.6	0,53	10	22904633	Nc6 hxg6 fxg6 Nxh7 Be7 Qg4 Ndxe5
>00:04:52.5	0,79	10	37974723	Nxe5 fxe5 Qc7 Nxh7 Qxe5+
>00:12:22.4	0,00	11	98465292	Nxe5 fxe5 Qc7 Nxh7 Qxe5+
>00:16:05.1	0,39	11	130139504	Nc6 hxg6 fxg6 Nxh7 Qe7 Nxf8 Nxf8
>00:32:53.6	0,03	12	268802395	Nc6 hxg6 fxg6 Nxh7 Ne7 Qg4
>
>Mobility at 125, I hope I can get that to work. Also [Pruning = MISC_30] *
>extend singular checks idem. This is responsible for including Nxe5 in the
>search. Maybe this extension description is not valid anymore but it works. So I
>take back the "Grrr"  from my last post about 12.Nc6! Just had to report this
>before every programmer starts tuning for a version of their own programs that
>plays 12.Nxe5 only!
>
>Ed Schröders game against Rebel 12:
>
>[Event "Play for fun"]
>[Site "Deventer"]
>[Date "06.11.2004"]
>[Round "?"]
>[White "Ed"]
>[Black "Rebel 12"]
>[Result "1-0"]
>[WhiteElo "?"]
>[BlackElo "?"]
>
>1. d4 Nf6 2. f3 d5 3. Nc3 c6 4. e4 e6 5. e5 Nfd7 6. f4 Bb4 7. Nf3 O-O 8.
>Bd3 c5 9. Ng5 g6 10. h4 cxd4 11. h5 dxc3 12. b3 Qc7 13. Nxh7 Nxe5 14. fxe5
>Qxe5+ 15. Kf1 Kxh7 16. hxg6+ Kg8 17. g7 Qf6+ 18. Ke1 Qxg7 19. Bh7+ Kh8
>20. Qh5 f5 21. Bg5 Nc6 22. Bxf5+ Kg8 23. Bh7+ Kh8 24. Be4+ Kg8 25. Bh6
>Qg3+ 26. Kd1 dxe4 27. Bg5 Qd6+ 28. Kc1 Qd7 29. Bf6 Qd2+ 30. Kb1 Qe1+ 31.
>Rxe1 Rxf6 32. Rh1 Kf8 33. Qh8+ Ke7 34. Rh7+ Rf7 35. a3 Bd6 36. Ka2 e5 37.
>Rah1 Nd8 38. R1h6 Bf5 39. Qf6+ Ke8 40. Rh8+ Bf8 41. Qxe5+ Kd7 42. Rf6 Rxf6
>43. Qxf6 Be6 44. Qxf8 *
>
>Thanks for any comment
> Eelco


Hi...
Fritz8 plays.....Nxe5....in 30 sec.

also Ruffian 1.0.1......prefers.....Nxe5.......55 sec.

P3-850



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