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Subject: Re: Early opening position

Author: John Merlino

Date: 09:58:49 05/17/04

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On May 17, 2004 at 04:03:56, Jouni Uski wrote:

>[D]rnb1kbnr/ppp1pppp/8/3q4/8/2N5/PPPP1PPP/R1BQKBNR b KQkq -
>
>All engines I tested want to play -Qe6+ , which is of course dubious. Is there
>engine to find itself better Qa5 or Qd8 at tournament level?
>
>Jouni

CM_SKR on an AMD 2500+ waffles between Qe6+ and Qd6, but eventually (and
unfortunately) settles on Qe6+:

Time	Depth	Score	Positions	Moves
0:00	1/3	5.85	1796		3...Qc6 4.Bb5 Nf6 5.Bxc6+ Nxc6
0:00	1/3	0.53	2227		3...Qf5 4.Bd3 Qe5+ 5.Nge2 Nf6
0:00	1/3	0.17	3221		3...Qe6+ 4.Be2 Qg6 5.Nf3 Qxg2
0:00	1/4	0.34	7061		3...Qe6+ 4.Be2 Qg6 5.Nf3 Qxg2 6.Rf1
0:00	1/5	0.31	21904		3...Qe6+ 4.Nge2 Nf6 5.d4 Qc6 6.Be3
					Be6
0:00	1/6	0.65	73578		3...Qe6+ 4.Be2 Qg6 5.Nf3 Qxg2 6.Rg1
					Qh3 7.d4
0:00	1/6	0.40	93012		3...Qd6 4.Nf3 Nc6 5.Nb5 Qd8 6.d4
					Nf6
0:00	1/7	0.51	142061		3...Qd6 4.Nf3 Nf6 5.d4 Nc6 6.Be3
					Be6 7.Bd3
0:00	1/7	0.44	188237		3...Qe6+ 4.Be2 Qg6 5.Nf3 Qxg2 6.Rg1
					Qh3 7.Nd5 Kd8
0:01	1/8	0.58	349633		3...Qe6+ 4.Be2 Qg6 5.Nf3 Nf6 6.Nb5
					Na6 7.O-O Bh3
0:02	1/8	0.55	659327		3...Qa5 4.Nf3 Nf6 5.d4 Be6 6.Bd3
					Nc6 7.O-O O-O-O
0:04	1/9	0.71	1036569		3...Qa5 4.Nf3 Nf6 5.d4 Be6 6.Bd3
					Nd5 7.Bd2 Nxc3 8.Bxc3
0:05	1/9	0.50	1351607		3...Qe6+ 4.Be2 Qg6 5.Nf3 Nf6 6.d4
					Qxg2 7.Rg1 Qh3 8.Bf4
0:09	1/10	0.56	2314084		3...Qe6+ 4.Be2 Qg6 5.Nf3 Nf6 6.d4
					Qxg2 7.Rg1 Qh3 8.Bf4 c6
0:15	1/10	0.52	3685589		3...Qd6 4.Nf3 Nf6 5.d4 Nc6 6.Bd3
					Nb4 7.O-O Nxd3 8.Qxd3 Bd7
0:29	1/11	0.69	6951605		3...Qd6 4.Nf3 Nf6 5.d4 Nc6 6.Nb5
					Qd7 7.Bf4 e5 8.Nxe5 Bb4+ 9.c3
0:39	1/11	0.39	9341289		3...Qe6+ 4.Be2 Qg6 5.Nf3 Qxg2 6.Rg1
					Qh3 7.d4 Nf6 8.Bf4 Nc6 9.Bxc7 Be6
1:02	1/12	0.55	15347263	3...Qe6+ 4.Be2 Qg6 5.Nf3 Qxg2 6.Rg1
					Qh3 7.d4 Nf6 8.Bf4 c6 9.Nd2 Bf5
					10.Bf3
2:35	1/13	0.46	38383524	3...Qe6+ 4.Be2 Qg6 5.Nf3 Qxg2 6.Rg1
					Qh3 7.d4 Nf6 8.Bf4 Na6 9.Qd2 Nb4
					10.O-O-O Bf5

Also, CM9000 will play Qa5 75% of the time from its opening book, and Qd8 the
other 25% of the time.

jm



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