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Subject: Re: Testposition - The Silence of the Knight

Author: John Merlino

Date: 12:11:17 02/28/01

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On February 28, 2001 at 07:13:50, Sune Larsson wrote:

>
>  [D]3r1r1k/p2p2pp/np1P1q2/5p2/1PP1p3/P3Q3/B2R1PPP/4R1K1 w - - 0 1
>
>  This is the game Kurt Richter - Schlage, Berlin 1930.
>  We can call it a positional test. The theme is about
>  immobilizing your opponent's pieces. Guess Richter was
>  in a splendid mood when he played 1.c5! bxc5 2.b5! Nb8 3.Lc4!
>  The black knight was a mere spectator for the rest of the game:
>
>  1.c5! bxc5 2.b5! Nb8 3.Bc4! Rde8 4.f4 Rc8 5.a4 h6 6.Rd5 g5 7.fxg5 Qxg5
>  8.Qxg5 hxg5 9.g4! fxg4 10.Rxe4 Rf4 11.Rxf4 gxf4 12.Rg5 g3 13.hxg3 fxg3
>  14.Kg2 Kh7 15.Kxg3 a6 16.Kf4 axb5 17.axb5 Kh6 18.Rg8 Rxg8 19.Bxg8 Kg7
>  20.Bc4 Kf6 21.Ke4 Kg5 22.Kd5 Kf4 23.Kxc5 Ke5 24.Bg8 Kf6 25.Kb6  1-0
>
>  Test: Your program should give white a big +score for the
>        moveorder 1.c5! bxc5 2.b5!
>
>  Sune

CM8000 doesn't think that 1...bxc5 is the proper response:

Time	Depth	Score	Positions	Moves
0:00	1/4	1.29	4958		1. c5 b5 2. Red1 Rfe8
0:00	2/5	1.16	11158		1. c5 b5 2. Red1 Rfe8 3. Bd5
0:00	2/6	1.32	26902		1. c5 b5 2. Red1 Rfe8 3. Qe2 Rb8
					4. Qh5
0:01	3/7	1.15	79474		1. c5 b5 2. Bb3 Nb8 3. a4 bxa4
					4. Bxa4 Rfe8 5. Bb3
0:03	3/8	1.18	202795		1. c5 b5 2. c6 dxc6 3. d7 Nc7 4.
					Red1 Ne6 5. Bxe6 Qxe6 6. Qxa7
0:10	4/9	1.08	669892		1. c5 b5 2. Bb3 Nb8 3. a4 bxa4
					4. Bxa4 Rde8 5. Bb5 f4
0:35	4/10	1.26	2285646		1. c5 b5 2. c6 dxc6 3. d7 Nc7 4.
					Red1 a6 5. Qb6 Nd5 6. Bxd5 cxd5
					7. Qxf6 Rxf6 8. Rxd5
2:03	5/11	1.20	8800155		1. c5 b5 2. c6 dxc6 3. d7 Ra8 4.
					Red1 Qe7 5. Rd6 f4 6. Qc3

After playing 1.c5 bxc5, though:

Time	Depth	Score	Positions	Moves
0:00	2/5	1.41	6473		2. b5 Nb8 3. Qxc5 Qh6 4. Rc2
0:00	3/7	1.21	40891		2. b5 Nb8 3. Qxc5 a6 4. bxa6 Qh6
					5. Qc3 Nxa6
0:02	3/8	1.19	119926		2. b5 Nb8 3. Qxc5 a6 4. b6 Rc8
					5. Qe3 Nc6 6. Rc1
0:06	4/9	1.28	419302		2. b5 Nb8 3. Qxc5 a6 4. bxa6 Nxa6
					5. Qa5 Ra8 6. Bc4 Qg5 7. Red1
0:22	4/10	0.93	1504912		2. b5 Nb8 3. Qxc5 a6 4. a4 Rc8
					5. Qe3 axb5 6. axb5 Rc3 7. Qa7
					Rfc8
1:28	5/11	1.01	7005842		2. b5 Nb8 3. Qxc5 a6 4. b6 Rc8
					5. Qa5 Qc3 6. Qxc3 Rxc3 7. a4 Nc6
					8. Rb1

jm



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