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Subject: Re: Test Position - R. Fischer - B Larsen 1958

Author: John Merlino

Date: 23:58:00 08/27/02

Go up one level in this thread


On August 28, 2002 at 02:35:49, Mike Byrne wrote:

>[D] 2r3k1/2r1ppb1/3p2p1/pq4Pn/1p1BP3/1B3P2/PPPQ4/1K1R3R w - - 1 22;bm Rxh5
>
>You might have to turn book off.
>==================================================================
>Not a convining score, but it still plays the best move
>
>Crafty v17.16 SE (2 cpus) (available for free via email to mfbyrne_pa@msn.com)
>
>White(1): 2r3k1/2r1ppb1/3p2p1/pq4Pn/1p1BP3/1B3P2/PPPQ4/1K1R3R w - - 1 22
>White(1): go
>              clearing hash tables
>              time surplus   0.00  time limit 100:00 (100:00)
>         nss  depth   time  score   variation (1)
>starting thread 1
>                2     0.00   1.20   1. Bxg7 Kxg7 2. Qd4+
>                2->   0.02   1.20   1. Bxg7 Kxg7 2. Qd4+
>                3     0.02   1.07   1. Bxg7 Kxg7 2. Qd4+ Qe5 3. Qe3
>                3->   0.02   1.07   1. Bxg7 Kxg7 2. Qd4+ Qe5 3. Qe3
>                4     0.03   1.02   1. Bxg7 Kxg7 2. Rh4 Qc5 3. Rdh1
>                4->   0.05   1.02   1. Bxg7 Kxg7 2. Rh4 Qc5 3. Rdh1
>                5     0.08   0.88   1. Bxg7 Kxg7 2. Rh2 Qc5 3. Rdh1 Ng3
>                5->   0.14   0.88   1. Bxg7 Kxg7 2. Rh2 Qc5 3. Rdh1 Ng3
>                6     0.31   0.70   1. Bxg7 a4 2. Bh6 axb3 3. cxb3 Ng3
>                                    4. Rh2
>                6->   0.48   0.70   1. Bxg7 a4 2. Bh6 axb3 3. cxb3 Ng3
>                                    4. Rh2
>                7     0.86     --   1. Bxg7
>                7     1.13   0.00   1. Bxg7 Kxg7 2. Qd4+ Kg8 3. Qd5 Qxd5
>                                    4. Rxd5 Ng3 5. Rh6
>                7     1.92   0.14   1. Rxh5 gxh5 2. g6 Bxd4 3. gxf7+ Kf8
>                                    4. Qxd4 Qe5 5. Qd3
>         (2)    7->   1.92   0.14   1. Rxh5 gxh5 2. g6 Bxd4 3. gxf7+ Kf8
>                                    4. Qxd4 Qe5 5. Qd3
>                8     2.22  -0.10   1. Rxh5 gxh5 2. g6 Bxd4 3. gxf7+ Kf8
>                                    4. Qxd4 Qe5 5. Qd3 h4
>                8     2.83   0.19   1. Bxg7 Kxg7 2. Qd4+ Kg8 3. Qd5 Qxd5
>                                    4. Rxd5 Rc5 5. a3 Nf4 6. Rxc5 Rxc5
>                                    7. axb4 axb4
>                8->   3.83   0.19   1. Bxg7 Kxg7 2. Qd4+ Kg8 3. Qd5 Qxd5
>                                    4. Rxd5 Rc5 5. a3 Nf4 6. Rxc5 Rxc5
>                                    7. axb4 axb4
>                9     4.77   0.30   1. Bxg7 Kxg7 2. Qd4+ Kg8 3. Qd5 Qxd5
>                                    4. Rxd5 Rc5 5. Rxc5 Rxc5 6. Bd5
>                9->   6.75   0.30   1. Bxg7 Kxg7 2. Qd4+ Kg8 3. Qd5 Qxd5
>                                    4. Rxd5 Rc5 5. Rxc5 Rxc5 6. Bd5
>               10     8.38   0.14   1. Bxg7 Kxg7 2. Qd4+ Kg8 3. Qd5 Qxd5
>                                    4. Rxd5 Rc5 5. a3 bxa3 6. bxa3 Nf4
>                                    7. Rxc5 Rxc5
>         (2)   10->  16.17   0.14   1. Bxg7 Kxg7 2. Qd4+ Kg8 3. Qd5 Qxd5
>                                    4. Rxd5 Rc5 5. a3 bxa3 6. bxa3 Nf4
>                                    7. Rxc5 Rxc5
>               11    22.22   0.12   1. Bxg7 Kxg7 2. Qd4+ Kg8 3. Qd5 Qxd5
>                                    4. Rxd5 Rc5 5. a3 Rxd5 6. exd5 Ng3
>                                    7. Rh4 Nf5
>               11     1:05   0.14   1. Rxh5 Bxd4 2. Rhh1 Be5 3. f4 a4 4.
>                                    Bxf7+ Kxf7 5. fxe5 Qxe5 6. Rh7+ Kg8
>                                    7. Rdh1 Qxe4
>               11->   1:05   0.14   1. Rxh5 Bxd4 2. Rhh1 Be5 3. f4 a4 4.
>                                    Bxf7+ Kxf7 5. fxe5 Qxe5 6. Rh7+ Kg8
>                                    7. Rdh1 Qxe4
>               12     1:31   0.13   1. Rxh5 Bxd4 2. Rhh1 Bg7 3. Qd5 Qxd5
>                                    4. Rxd5 Rc5 5. a3 Rxd5 6. exd5 bxa3
>                                    7. bxa3 Kf8

Chessmaster 9000 needs 30 seconds to see Rxh5 on a PIII-733 (with a SLIGHTLY
more convincing score):

Time	Depth	Score	Positions	Moves
0:00	1/3	0.93	1239		1.Bxg7 Nxg7 2.Qh2 Nh5
0:00	1/4	0.93	4368		1.Bxg7 Nxg7 2.Qh2 Nh5
0:00	1/5	0.64	18840		1.Bxg7 Kxg7 2.Qe3 a4 3.Rd5
0:00	1/6	0.72	48810		1.Bxg7 Kxg7 2.Qe3 a4 3.Rd5 Qd7
0:02	1/7	0.31	163391		1.Bxg7 Kxg7 2.Qd4+ Kg8 3.Qe3 a4
					4.Rd5 Qd7
0:07	1/8	0.28	548208		1.Bxg7 Kxg7 2.Qd4+ Kg8 3.Qd5 Qxd5
					4.Rxd5 Rc5 5.Rxc5 Rxc5
0:18	1/9	0.10	1547758		1.Bxg7 Kxg7 2.Qd5 Qxd5 3.Rxd5 Rc5
					4.Rh4 Rxd5 5.exd5 Ng3 6.Bc4
0:30	1/9	0.18	2597563		1.Rxh5 gxh5 2.g6 Bxd4 3.Qxd4 Qe5
					4.gxf7+ Kh7 5.Qxe5 dxe5 6.Be6 Rh8
					7.Rd5 Kg7 8.Rxe5
1:31	1/10	0.25	7619014		1.Rxh5 gxh5 2.g6 Bxd4 3.Qxd4 Rc4
					4.gxf7+ Kxf7 5.Rh1 Kg6 6.Rg1+ Kf7
					7.Rg7+ Ke8 8.Bxc4 Qxc4 9.Qf2
3:30	2/11	0.30	18221310	1.Rxh5 gxh5 2.g6 Bxd4 3.Qxd4 Rc4
					4.Qd3 fxg6 5.e5 Kf8 6.exd6 exd6
					7.Qxg6 Qe5 8.Bxc4 Rxc4

jm



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