Author: Tom Likens
Date: 18:43:32 01/12/03
Go up one level in this thread
On January 12, 2003 at 14:27:47, Stan Arts wrote:
>Hello!
>
>In one of the games posted by Sedat Cambaz a few days ago, between Fritz 8 and
>The King, the following position occured:
>
>[D]3r1r1k/2q3bp/3N4/p1P1n1p1/P2BPp2/5P2/4Q1PP/R2R2K1 b - - 0 1
>
>And black played, Nxf3!
>
>It's a nice move for humans, and chessprograms to the lower end of the rating
>lists. :) (It takes 9 halfmoves to see the combination)
>
>The strong programs probably find it in a second or so..but how long do the
>not-so-strong programs take to find Nxf3 here? (never see too many search-
>results of the weaker programs posted :( )
>
>This is what my program S-chess (v1.41) thinks of this position on my P3-550mHz
>(and thinking in the background while I am surfing on the internet)
>It finds Nxf3 on the 9th ply, and after an hour search this is what my program
>thinks:
>
>3 -237 0 1919 Bg7-f6 a8-a8
>3 -233 0 2889 Qc7-e7 a8-a8
>4 -255 0 9529 Qc7-e7 Nd6-f5 Qe7-d7 Nf5xg7
>4 -253 0 11918 Ne5-c6 Bd4xg7 Kh8xg7 Kg1-h1
>4 -252 0 24029 Qc7-d7 Nd6-f5 Rd8-c8 Nf5xg7
>4 -247 0 40933 Rd8-a8 Nd6-f5 Ra8-c8 Nf5xg7
>5 -238 1 68768 Rd8-a8 Nd6-f5 Ra8-d8 Nf5xg7 Rd8xd4
>5 -233 1 97594 Qc7-e7 Bd4-c3 Rd8-a8 Bc3xe5
>5 -211 2 130246 g5-g4 Nd6-f5 g4xf3 g2xf3 Rd8-c8
>6 -301 4 345677 g5-g4 Nd6-b5 Qc7-b8 f3xg4 Qb8-b7
>6 -249 6 514324 Rd8-a8 Nd6-f5 Bg7-f6 Qe2-d2 Ne5-c6 Bd4-b2
>6 -245 9 742263 Ne5-c6 Bd4xg7 Qc7xg7 Qe2-b5 Qg7-d7 Nd6-f5
>7 -241 21 1581640 Ne5-c6 Bd4xg7 Qc7xg7 Qe2-b5 Rd8-c8 Nd6xc8 Qg7xa1
>7 -221 26 1909602 g5-g4 f3xg4 f4-f3 Qe2-a2 Ne5xg4 Bd4xg7 Qc7xg7
>8 -298 166 11040531 g5-g4 f3xg4 f4-f3 Qe2-f2 f3xg2 Nd6-f5 Rd8-c8 Qf2xg2
>8 -247 183 12557616 Ne5-c6 Bd4xg7 Qc7xg7 Qe2-b5 Qg7-d7 Nd6-f7 Qd7xf7 Qb5xc6
>9 -219 820 58315863 Ne5-c6 Bd4-b2 Qc7-e7 Rd1-d5 Rd8-b8 Nd6-b5 Nc6-e5 Nb5-d6
>g5-g4
>9 -204 991 68947710 g5-g4 Nd6-b5 g4xf3 g2xf3 Qc7-f7 Qe2-g2 Qf7-h5 Ra1-a3
>Rd8-c8
>9 6 1157 81019201 Ne5xf3 g2xf3 Bg7xd4 Rd1xd4 Qc7xc5 Qe2-c4 Qc5xc4 Rd4xc4
>Rd8xd6
>10 -15 1413 103620606 Ne5xf3 g2xf3 Bg7xd4 Rd1xd4 Qc7xc5 Qe2-c4 Qc5xc4 Rd4xc4
>Rd8xd6 Kg1-h1
>11 6 3017 179367100 Ne5xf3 g2xf3 Bg7xd4 Rd1xd4 Qc7xc5 Qe2-c4 Qc5xc4 Rd4xc4
>Rd8xd6 Rc4-c7
>
>Stan
Hello Stan,
My engine djinn gets the following PVs after about a minute on a P4 2.2-GHz
machine (it's definitely an amateur engine, since I do this for fun and the
challenge more than anything else). I also notice the score dropping after
the 9th ply the same as CM9000.
2 00:00:00 2.75 1. ... Qc6 2. Ra3
3 00:00:00 3.06 1. ... Nd7 2. Bxg7+ Kxg7 3. Nf5+ Kg6 4. Ne7+H Kh6H
5. c6 <HT>
4 00:00:00 2.91 1. ... Nd7 2. Bxg7+ Kxg7 3. Qb2+ Kg6 4. Nb7
5 00:00:00 -.-- 1. ... Nxf3+!!
5 00:00:00 0.52 1. ... Nxf3+ 2. gxf3 Bxd4+ 3. Rxd4 Qxc5 4. Rd1
6 00:00:00 0.52 1. ... Nxf3+ 2. gxf3 Bxd4+ 3. Rxd4 Qxc5 4. Qf2 Rxd6
5. Rxd6 Qxd6
7 00:00:00 0.57 1. ... Nxf3+ 2. gxf3 Bxd4+ 3. Rxd4 Qxc5 4. Qf2 Rxd6
5. Rxd6 Qxd6 6. Rc1
8 00:00:00 0.69 1. ... Nxf3+ 2. gxf3 Bxd4+ 3. Rxd4 Qxc5 4. Qc4 Qxc4
5. Rxc4 Rxd6 6. Rc7
9 00:00:00 +.++ 1. ... Nxf3+ 2. gxf3 Bxd4+ 3. Rxd4 Qxc5 4. Qc4 Qxc4
5. Rxc4 Rxd6 6. Rc7
9 00:00:02 2.09 1. ... Nxf3+ 2. gxf3 Bxd4+ 3. Rxd4 Qxc5 4. Nb5 Rxd4
5. Qb2 Rd8 6. Rd1 g4
10 00:00:02 -.-- 1. ... Nxf3+!!
10 00:00:04 0.83 1. ... Nxf3+ 2. gxf3 Bxd4+ 3. Rxd4 Qxc5 4. Qc4 Qxc4
5. Rxc4 Rxd6
11 00:00:08 0.77 1. ... Nxf3+ 2. gxf3 Bxd4+ 3. Rxd4 Qxc5 4. Qc4 Qxc4
5. Rxc4 Rxd6 6. Rc5 g4 7. fxg4 Rg6
12 00:00:30 0.77 1. ... Nxf3+ 2. gxf3 Bxd4+ 3. Rxd4 Qxc5 4. Qc4 Qxc4
5. Rxc4 Rxd6 6. Rc5 g4 7. fxg4 Rg6 8. Rxa5
regards,
--tom
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