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Subject: Re: (OT) A Preview of the Anthology of Chess Combinations, 3rd Edition

Author: Drexel,Michael

Date: 14:31:58 04/22/04

Go up one level in this thread


On April 22, 2004 at 13:48:05, John Merlino wrote:

>On April 22, 2004 at 13:22:12, John Merlino wrote:
>
>>On April 22, 2004 at 10:34:36, José Antônio Fabiano Mendes wrote:
>>
>>>     Please see ==> http://www.chesscafe.com/informant/informant.htm
>>>                    [six interesting test positions]
>>
>>Here are the positions:
>>
>
>Here is CM_SKR's output on an AMD 2500+:

Hi John,
here are the results from the best Tiger engine to date
on AMD XP-M 3000+ (2.2 GHz),CA 7.1:

>
>>[D]2r4k/ppq1r1b1/1n1R2Rp/8/5p1Q/1B5P/PP3PPK/8 w - - 0 1
>>
>>1.Rdf6!
>
>No problem here....

Same here...

 [White "Tiger Gambit II"]
 [ (+4.50)]  d=11  1.Rdf6 f3 2.g3 Qc1 3.Rf4 Qxf4 4.Qxf4 Nd7 5.Qd6 Rce8 6.Ba4 b5
7.Bxb5 (0:00.31)
 [ (+3.74)]  d=10  1.Rdf6 f3 2.g3 Nc4 3.Rxh6 Kg8 4.Rfg6 b5 5.Bxc4 bxc4 6.Rh8
Kf7 7.Rxc8 Qxc8 8.Rxg7 Kxg7 9.Qxe7 (0:00.17)
 [±/ (+2.66)]  d=10  1.Rdf6 (0:00.12)
 [±/ (+2.04)]  d=10  1.Rxg7 Rxg7 2.Qxh6 Rh7 3.Qf6 Rg7 4.Qe5 Nc4 5.Rh6 Kg8 6.Qd5
Qf7 7.Bxc4 Rxc4 8.Qd8 Qf8 9.Rh8 (0:00.01)
 [±/ (+1.76)]  d=9  1.Rxg7 Rxg7 2.Qxh6 Rh7 3.Qf6 Rg7 4.Qe5 Nc4 5.Rh6 Kg8 6.Qd5
Rf7 7.Qh5 Kf8 (0:00.01)
 [±/ (+1.80)]  d=8  1.Rxg7 Rxg7 2.Qxh6 Rh7 3.Qf6 Rg7 4.Qe5 Nc4 5.Rh6 Kg8 6.Qd5
Rf7 7.Qh5 (0:00.00)
 [± (+1.46)]  d=8  1.Rxg7 (0:00.00)
 [² (+0.42)]  d=8  1.Qh5 Rd7 2.Rxd7 Qxd7 3.Be6 Qc7 4.Bxc8 Qxc8 5.b3 Qf8
(0:00.00)
 [² (+0.56)]  d=8  1.Qxf4 Rd7 2.Rxh6 Bxh6 3.Qxh6 Rh7 4.Qf6 Rg7 5.Qe5 Nc4 6.Rh6
Kg8 (0:00.00)

>>
>>[D]6k1/p3Bpp1/2R1b1q1/7p/4n1P1/3pP3/P4PBP/3R2K1 b - - 0 1
>>
>>1...f6!!
>
>Tougher to find, and over two minutes before the score favors the side to
>move....

Two minutes to find it and no convincing score after 3 min

 [= (+0.10)]  d=15  1...f6 2.f3 Ng5 3.Kf1 Nxf3 4.Rxe6 Nxh2 5.Kg1 Qxg4 6.Ra6 Qxd1
7.Kxh2 Qa1 8.Rxa7 Qe5 9.Kh1 Qxe3 (0:03.28)
 [²/= (+0.20)]  d=14  1...f6 2.f3 Ng5 3.Kf1 Nxf3 4.Rxe6 Nxh2 5.Kg1 Qxg4 6.Ra6
Qxd1 7.Kxh2 Qe2 8.Rxa7 Qxe3 (0:02.17)
 [²/= (+0.20)]  d=13  1...f6 2.f3 Ng5 3.Kf1 Nxf3 4.Rxe6 Nxh2 5.Kg1 Qxg4 6.Ra6
Qxd1 7.Kxh2 Qe2 8.Rxa7 Qxe3 (0:01.56)
 [² (+0.70)]  d=13  1...Nf6 2.gxh5 Qg4 3.Rxd3 Bd5 4.f3 Bxf3 5.Rc2 Ne4 6.h3 Qxh5
7.Rd7 Bxg2 (0:01.08)
 [²/± (+0.86)]  d=12  1...Nf6 2.Bxf6 Bd5 3.Rc8 Kh7 4.Rc5 Bxg2 5.Rxh5 Kg8 6.Bg5
Qe4 7.Rb1 f6 8.Rb8 Kf7 (0:00.20)
 [²/± (+0.86)]  d=11  1...Nf6 2.Bxf6 Bd5 3.Rc8 Kh7 4.Rc5 Bxg2 5.Rxh5 Kg8 6.Bg5
Bf3 7.Rb1 Qd6 (0:00.11)
 [± (+1.06)]  d=11  1...d2 2.f3 Nf6 3.Rxd2 hxg4 4.f4 Qb1 5.Bf1 Ne4 6.Rd4 g3
7.hxg3 Nxg3 (0:00.02)
 [± (+1.20)]  d=10  1...d2 2.f3 Nf6 3.Rxd2 hxg4 4.f4 Qb1 5.Bf1 Qe1 6.Re2 Qd1
7.Bxf6 gxf6 (0:00.01)
 [± (+1.24)]  d=10  1...hxg4 2.Rxd3 Qf5 3.Rd8 Kh7 4.Bh4 Bxa2 (0:00.01)
 [± (+1.28)]  d=9  1...hxg4 2.Rxd3 Qf5 3.Bh4 Bd5 4.Rc7 a5 5.Bxe4 Bxe4 (0:00.00)


>>
>>[D]5kn1/2q2r2/1p1pQP2/p1pPp1R1/b1P1B1P1/2P2P2/8/6K1 w - - 0 1
>>
>>1.Bh7!
>
>Just a few seconds....

ditto

 [±/ (+1.78)]  d=16  1.Bh7 Nxf6 2.Bg6 Be8 3.Bxf7 Qxf7 4.Qxd6 Qe7 5.Qxb6 Ng8
6.Rf5 Kg7 7.Qb8 Bg6 8.d6 Qh4 9.Qf8 Kh7 (0:00.31)
 [± (+1.60)]  d=15  1.Bh7 Nxf6 2.Bg6 Be8 3.Bxf7 Qxf7 4.Qxd6 Qe7 5.Qxb6 Ng8 6.Rf5
Kg7 7.d6 Qh4 8.Qxc5 Qg3 9.Kf1 Qh3 (0:00.16)
 [± (+1.48)]  d=14  1.Bh7 Nxf6 2.Bg6 b5 3.Bxf7 Qxf7 4.Qxd6 Qe7 5.Qb8 Qe8 6.Qb6
Qe7 7.cxb5 e4 8.Rf5 Kg7 9.Qxa5 (0:00.09)
 [± (+1.24)]  d=13  1.Bh7 Nxf6 2.Bg6 Be8 3.Bxf7 Qxf7 4.Qxd6 Qe7 5.Qxb6 a4 6.Rf5
Kg7 7.d6 Qe6 8.Qxc5 (0:00.06)
 [² (+0.67)]  d=13  1.Bh7 (0:00.04)
 [=/³ (-0.23)]  d=13  1.Rxg8 Kxg8 2.Bg6 Bb3 3.Qe8 Rf8 4.Qe6 Rf7 (0:00.03)
 [=/³ (-0.23)]  d=12  1.Rxg8 Kxg8 2.Bg6 Bb3 3.Qe8 Rf8 4.Qe6 Rf7 (0:00.01)
 [=/³ (-0.23)]  d=11  1.Rxg8 Kxg8 2.Bg6 Bb3 3.Qe8 Rf8 4.Qe6 Rf7 (0:00.01)
 [=/³ (-0.23)]  d=10  1.Rxg8 Kxg8 2.Bg6 Bb3 3.Qe8 Rf8 4.Qe6 Rf7 (0:00.00)
 [=/³ (-0.23)]  d=9  1.Rxg8 Kxg8 2.Bg6 Bb3 3.Qe8 Rf8 4.Qe6 Rf7 (0:00.00)
>>
>>[D]2rr2k1/pp1bQp2/1q1p2pB/7n/3bP2P/2NB1P2/PPP5/2KR2R1 w - - 0 1
>>
>>1.Bc4!
>
>Thirteen seconds to find, but almost four minutes to give a good score:

Instantly...

[± (+1.42)]  d=16  1.Bc4 (0:03.30)
 [± (+1.42)]  d=15  1.Bc4 (0:01.48)
 [² (+0.52)]  d=14  1.Bc4 d5 2.Bxd5 Bxg1 3.Bxf7 Kh8 4.Rd6 Be3 5.Bxe3 Qxe3 6.Kb1
Qe1 7.Nd1 Qe2 8.c3 Qxf3 9.Bxg6 (0:00.33)
 [± (+1.18)]  d=13  1.Bc4 d5 2.Bxd5 Bxg1 3.Bxf7 Kh8 4.Rxd7 Be3 5.Bxe3 Qxe3 6.Kd1
Qxf3 7.Ne2 Rxd7 8.Qxd7 Qf1 (0:00.09)
 [± (+1.58)]  d=12  1.Bc4 Rxc4 2.Rxd4 Rxd4 3.Be3 Rxe4 4.Qxe4 Qc6 5.Nd5 Qa4 6.Ne7
Kf8 7.Bh6 Ng7 (0:00.02)
 [± (+1.58)]  d=11  1.Bc4 Rxc4 2.Rxd4 Rxd4 3.Be3 Rxe4 4.Qxe4 Qc6 5.Nd5 Qa4 6.Ne7
Kf8 7.Bh6 Ng7 (0:00.01)
 [± (+1.18)]  d=10  1.Bc4 Rxc4 2.Rxd4 Rxd4 3.Be3 Rxe4 4.Qxe4 Qc6 5.Qd4 Qc5
6.Qxc5 dxc5 7.Bxc5 (0:00.00)
 [± (+1.24)]  d=10  1.Bc4 Rxc4 (0:00.00)
 [± (+1.24)]  d=9  1.Bc4 (0:00.00)
 [²/= (+0.34)]  d=8  1.Bc4 Kh8 2.Bxf7 Bxg1 3.Bxg6 Be3 4.Kb1 (0:00.00)
>>
>>1.Rc7!
>
>No problem.

A nobrainer

 [±/ (+1.66)]  d=14  1.Rc7 Bf8 2.Bh7 Kh8 3.Qe5 Qxc7 4.Qxc7 Bxh6 5.Qxb7 Nxh7
6.Rxe6 Rd1 7.Kh2 Bf4 8.g3 Rb8 9.Qxa7 (0:01.44)
 [± (+1.52)]  d=13  1.Rc7 Bf8 2.Bf4 Rac8 3.Rec1 Rxc7 4.Rxc7 Rd5 5.Be5 Bg7 6.h6
(0:00.42)
 [± (+1.35)]  d=12  1.Rc7 Bf8 2.Bf4 Rac8 3.Rec1 Rxc7 4.Bxc7 Rc8 5.Bxb6 Rxc1
6.Kh2 Bd6 7.f4 (0:00.18)
 [± (+1.36)]  d=11  1.Rc7 Bf8 2.Bf4 Rac8 3.Rec1 Bg7 4.h6 Bxh6 5.Rxc8 Bxf4 6.Rxd8
Qxd8 7.Qxe6 Kf8 (0:00.08)
 [± (+1.32)]  d=10  1.Rc7 Bf8 2.Bf4 Rac8 3.Rec1 Bg7 4.h6 Bxh6 5.Rxc8 Bxf4 6.Rxd8
Qxd8 7.Qxe6 Kf8 (0:00.05)
 [²/± (+0.74)]  d=9  1.Rc7 Bf8 2.Bf4 Rdc8 3.Rxc8 Rxc8 4.Qe5 Bg7 5.h6 Qxf2 6.Kxf2
Ng4 7.Kf1 Nxe5 (0:00.03)
 [±/ (+1.76)]  d=8  1.Rc7 Qxc7 (0:00.00)
>>
>>[D]2r1r1k1/pb1p1p2/3P1qpp/8/3N4/2P3QP/P2KBPPn/R5R1 b - - 0 1
>>
>>1...Nf3!!
>
>Ok. This one was tough. Just under five minutes, but the score is only a
>draw.... The hard part is seeing all the way down to 6...Re5+ in the main line
>(which The King sees up to that crucial point).

1 minute to switch to 1...Nf3, but without convincing score after 15 minutes.

 [²/= (+0.28)]  d=16  1...Nf3 2.Bxf3 Rxc3 3.Kxc3 Rc8 4.Kb3 Qxd4 5.Bxb7 Qb6 6.Ka3
Qa5 7.Kb3 Qb6 (0:14.47)
 [²/= (+0.28)]  d=15  1...Nf3 2.Bxf3 Rxc3 3.Kxc3 Rc8 4.Kb3 Qxd4 5.Bxb7 Qb6 6.Ka3
Qa5 7.Kb3 Qb6 (0:05.07)
 [²/= (+0.30)]  d=14  1...Nf3 2.Bxf3 Rxc3 3.Kxc3 Rc8 4.Kb3 Qxd4 5.Bxb7 Qc4 6.Ka3
Qc5 7.Kb2 Qc2 8.Ka3 Qc5 (0:02.12)
 [²/= (+0.30)]  d=13  1...Nf3 2.Bxf3 Rxc3 3.Kxc3 Rc8 4.Kb3 Qxd4 5.Bxb7 Qc4 6.Ka3
Qc5 7.Kb2 Qc2 8.Ka3 Qc5 (0:01.09)
 [² (+0.64)]  d=13  1...Re4 2.Rgc1 (0:00.42)
 [² (+0.64)]  d=12  1...Re4 2.Rgc1 Rxd4 3.cxd4 Qxd4 4.Qd3 Qf4 5.Qe3 Qxd6 6.Bd3
Qb4 7.Kd1 Kh7 8.Ke2 Qb2 9.Qd2 Re8 (0:00.38)
 [± (+1.35)]  d=11  1...Re4 2.Rgd1 Bd5 3.Rab1 Bxa2 4.Rb7 Bd5 5.Rxd7 Rxd4 6.cxd4
Qf5 7.Rxa7 Qc2 (0:00.06)
 [± (+1.20)]  d=10  1...Re4 2.Rgd1 Bd5 3.Qxh2 Qxf2 4.Qg1 Qf4 5.Ke1 Rxc3
(0:00.01)
 [± (+1.16)]  d=9  1...Re4 2.Rgd1 (0:00.00)
 [± (+1.28)]  d=8  1...Re4 2.Rgd1 Bd5 3.Qxh2 Qxf2 4.Qg1 Qf4 5.Ke1 Rxc3 (0:00.00)

Michael

>jm



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