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Subject: Re: new test positions

Author: John Merlino

Date: 17:38:58 06/14/02

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On June 14, 2002 at 19:23:40, Jon Dart wrote:

>Here are some new positions from Arasan games I've added to my test suite:
>
>Arasan2.60: Best move f5:
>
>[D] rn3rk1/pb1p1p1p/1p2pBp1/8/1qPN1P2/8/2QRB2P/4K1R1 w - -
>
Results with Chessmaster 9000 (Beta version) on a PIII-600:

CM9000 chooses f5 in less than one second, but then switches to Rg3 at two
seconds. It then switches back to f5 after 19 seconds:

Time	Depth	Score	Positions	Moves
0:00	1/3	1.09	1786		1.Rg3 d6 2.Nb5 Nd7
0:00	1/3	1.15	3719		1.f5 Rc8 2.fxg6 hxg6
0:00	1/4	1.68	7390		1.f5 exf5 2.Nxf5 Re8 3.Rg3
0:00	2/5	1.57	25300		1.f5 exf5 2.Nxf5 Re8 3.Rg3 Be4
0:02	2/6	1.24	113483		1.f5 exf5 2.Nxf5 Re8 3.Bc3 Qc5
					4.Bd4 Qa3
0:02	2/6	1.33	153291		1.Rg3 Nc6 2.Nxc6 Bxc6 3.f5 exf5
					4.Qxf5
0:06	3/7	1.26	399824		1.Rg3 d5 2.Nxe6 Qd6 3.cxd5 Rc8
					4.Bc3 Rxc3 5.Qxc3 fxe6
0:16	3/8	1.15	1088638		1.Rg3 Na6 2.Nb3 Rac8 3.h4 d5 4.h5
					dxc4 5.hxg6
0:19	3/8	1.27	1276432		1.f5 exf5 2.Nxf5 Re8 3.Bc3 Qa3
					4.Rg4 d6 5.Nxd6 Re3
0:53	4/9	1.65	3647221		1.f5 exf5 2.Nxf5 Re8 3.Nh6+ Kf8
					4.Rf1 Rxe2+ 5.Kxe2 Qc5 6.Ng4 d6
					7.Ne5 Nc6

>Arasan2.61: Best move Bf5:
>
>[D] r1b1r1k1/ppq2p1p/3b2pQ/3pn3/8/2P4P/PPBN1PP1/R1B1R1K1 b - -

Thirteen seconds:

Time	Depth	Score	Positions	Moves
0:00	1/3	-0.30	4219		1...Bd7 2.Rd1 Qb6 3.Nb3
0:00	1/4	-0.50	11006		1...Bd7 2.Rd1 Bf8 3.Qh4 Bg7
0:00	2/5	-0.45	31857		1...Bd7 2.Rd1 Bf8 3.Qh4 Bg7 4.Nb3
0:02	2/6	-0.62	149810		1...Bd7 2.Rd1 Bf8 3.Qh4 Bg7 4.Nf1
					Qd6
0:05	3/7	-0.43	359908		1...Bd7 2.Rd1 f5 3.Qh4 Bb5 4.Bb3
					Qf7
0:13	3/7	-1.60	916108		1...Bf5 2.Bb3 Ng4 3.Rxe8+ Rxe8
					4.hxg4 Re1+ 5.Nf1 Bd3 6.g3 Bxg3
					7.Kg2 Bxf1+ 8.Kg1
0:16	3/8	-2.50	1173990		1...Bf5 2.Bb3 Ng4 3.Rxe8+ Rxe8
					4.hxg4 Re1+ 5.Nf1 Bd3 6.Be3 Rxa1
					7.Bc1 d4
0:35	4/9	-2.81	2834521		1...Bf5 2.Bb3 Ng4 3.Rxe8+ Rxe8
					4.hxg4 Re1+ 5.Nf1 Bd3 6.g3 Rxf1+
					7.Kg2 Bxg3 8.f3 Rf2+ 9.Kg1 Rh2

>Arasan2.62: Best move f4:
>
>[D] rn3rk1/pb2b2p/5p2/2p1qNp1/1p2p1Q1/4B3/PPPN1PPP/R4RK1 w - -

Less than one second:

Time	Depth	Score	Positions	Moves
0:00	1/3	0.33	2760		1.Nc4 Qc7 2.Rad1 Re8
0:00	1/4	0.40	6065		1.Nc4 Qc7 2.Rad1 Kh8 3.Nxe7 Qxe7
0:00	1/4	0.87	7724		1.f4 exf3ep 2.Nxf3 Qc7 3.Qc4+ Kh8
					4.Nxe7 Qxe7 5.Bxc5
0:00	2/5	0.87	27764		1.f4 exf3ep 2.Nxf3 Qc7 3.Qc4+ Kh8
					4.Nxe7 Qxe7 5.Bxc5
0:01	2/6	0.87	53641		1.f4 exf3ep 2.Nxf3 Qc7 3.Qc4+ Kh8
					4.Nxe7 Qxe7 5.Bxc5
0:02	3/7	0.87	147806		1.f4 exf3ep 2.Nxf3 Qc7 3.Qc4+ Kh8
					4.Nxe7 Qxe7 5.Bxc5
0:07	3/8	1.42	522382		1.f4 exf3ep 2.Nxf3 Qc7 3.Nxg5 fxg5
					4.Bxg5 Kh8 5.Nxe7 Nd7
0:27	4/9	2.28	2007071		1.f4 exf3ep 2.Nxf3 Qc7 3.Nxg5 fxg5
					4.Bxg5 Kh8 5.Bf4 Bd6 6.Nxd6
1:51	4/10	3.43	8722832		1.f4 exf3ep 2.Nxf3 Bxf3 3.Qxf3
					Nd7 4.Qd5+ Qxd5 5.Nxe7+ Kg7 6.Nxd5
					Rfe8 7.Rad1 Rad8

jm



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