Author: Robert Hyatt
Date: 06:35:40 09/17/98
Go up one level in this thread
On September 17, 1998 at 06:12:56, Dirk Frickenschmidt wrote:
>Here's one of the test positions where I was surprised about Junior5's tactical
>strength.
>
>Fritz5 blundered this position standing well but accepting an exchange sacrifice
>leading to a black mate attack. And Fritz normally does *very* well in finding
>mate threats. Other programs like Mchess 7.1 and Rebel9 also have problems with
>this positions, as is mentioned below. I guess this could count for most
>programs - with the possible exception of de Konings programs guessed again,
>perhaps also some Kittinger prg - , so please test and show me I was wrong...
>;-)
>
>Junior5 had the best time of soving this problem by far from the four programs I
>tested so far.
>
>Fritz5 - Golubev,M [E98]
>Sparkassen open rapid bad tactical move
>[DF]
>
>1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 0-0 6.Be2 e5 7.0-0 Nc6 8.d5 Ne7 9.Ne1
>c5 10.dxc6 bxc6 11.b4 d5 12.Bg5 d4 13.Bxf6 Bxf6 14.Na4 Bg7 15.Nc5 h5 16.f4 exf4
>17.Ned3 h4 18.Rxf4 a5 19.b5 cxb5 20.cxb5 a4 21.Rb1 Bh6 22.Rf1 Be3+ 23.Kh1 f5
>24.Bf3 fxe4 25.Bxe4 Nf5 26.Bxa8?? [This is the Fritz5 blunder losing the game.
>Mchess 7.1 sees problems in ply 8 after about 5' and begins dropping from +5.02
>down to +2.10, considering g4 as alternative and finally switching to ot after
>about 15'. Rebel9 smells "something" after 1'17, dropping from +6.23 to 4.09 in
>ply 9, but needs ply 11 and about 20' to evaluate even less with +0.63, still
>not finding another move within 30'.} [But Junior5 sees the mess already after
>1'51 on 200MMX-32Mb Hash and switches to 26.g4 with a white winning position]
>26...Ng3+ 27.hxg3 hxg3 28.Rxf8+ Qxf8 29.Bd5+ Kh8 30.Qh5+ 0-1
>
>Kind regards
>from Dirk
>
>
>P.S. I was not able to continue my Junior5 tournament testgames for some days
>for a - perhaps from your view - funny reason:
>My parents in law visit us for some days and the second computer, being used for
>non-chess purposes (my two sons playing and one of them beginning to program)
>during the day, is in the room where they sleep.
>Of course their healthy sleep, undisturbed by computer cooler sounds, is *much*
>more important to me than any game of chess ever will be! :-)
>
>So I ask for your understanding and will continue the tournament with the first
>game against Fritz5 next night probably.
Here's what I get on my 4 processor P6/200 machine:
Crafty v15.20 (4 cpus)
depth time score variation (1)
1 0.01 5.88 26. Bxa8
1-> 0.02 5.88 26. Bxa8
2 0.03 5.50 26. Bxa8 a3
2-> 0.05 5.50 26. Bxa8 a3
3 0.05 ++ 26. Bxa8!!
3 0.06 6.57 26. Bxa8 Qf6 27. Qxa4
3-> 0.07 6.57 26. Bxa8 Qf6 27. Qxa4
4 0.12 6.43 26. Bxa8 Qd6 27. Qxa4 Qb6
4-> 0.13 6.43 26. Bxa8 Qd6 27. Qxa4 Qb6
5 0.22 6.43 26. Bxa8 a3 27. Qb3+ Rf7 28. Qxa3 Qb6
5-> 0.26 6.43 26. Bxa8 a3 27. Qb3+ Rf7 28. Qxa3 Qb6
6 0.67 -- 26. Bxa8
6 0.75 5.72 26. Bxa8 Ng3+ 27. hxg3 Rxf1+ 28. Qxf1
hxg3 29. Nf4 Bf5 30. Qc4+ Kh8 31. Rb4
Qxa8 32. Rxa4
6-> 1.08 5.72 26. Bxa8 Ng3+ 27. hxg3 Rxf1+ 28. Qxf1
hxg3 29. Nf4 Bf5 30. Qc4+ Kh8 31. Rb4
Qxa8 32. Rxa4
7 1.65 5.59 26. Bxa8 Ng3+ 27. hxg3 hxg3 28. Rxf8+
Qxf8 29. Bd5+ Kh7 30. Bf3 Qh6+ 31.
Bh5 Bf5 32. Nxa4 Bxd3 33. Qxd3 Qxh5
7-> 5.03 5.59 26. Bxa8 Ng3+ 27. hxg3 hxg3 28. Rxf8+
Qxf8 29. Bd5+ Kh7 30. Bf3 Qh6+ 31.
Bh5 Bf5 32. Nxa4 Bxd3 33. Qxd3 Qxh5
8 7.47 5.66 26. Bxa8 Ng3+ 27. hxg3 hxg3 28. Rxf8+
Qxf8 29. Bd5+ Kh8 30. Bf3 Qh6+ 31.
Bh5 Qg5 32. Bg4 Bxg4 33. Qxa4
8-> 13.10 5.66 26. Bxa8 Ng3+ 27. hxg3 hxg3 28. Rxf8+
Qxf8 29. Bd5+ Kh8 30. Bf3 Qh6+ 31.
Bh5 Qg5 32. Bg4 Bxg4 33. Qxa4
9 16.03 -- 26. Bxa8
9 24.29 2.05 26. Bxa8 Ng3+ 27. hxg3 hxg3 28. Rxf8+
Qxf8 29. Bd5+ Kh8 30. Bf3 Qh6+ 31.
Bh5 Qg5 32. Nf4 Qxf4 33. Bg4 Bxg4 34.
Qxa4
9 32.44 2.29 26. Ne5 Ra7 27. Nxg6 Rf6 28. Ne5 Qd6
29. b6 Rg7 30. Ncd3
9 37.19 ++ 26. b6!!
9 45.28 3.25 26. b6 Rb8 27. b7 Bd7 28. Na6 Qa5 29.
Nxb8 Rxb8 30. Rb2 Qc3
9-> 1:12 3.25 26. b6 Rb8 27. b7 Bd7 28. Na6 Qa5 29.
Nxb8 Rxb8 30. Rb2 Qc3
10 1:47 -- 26. b6
10 2:09 2.54 26. b6 Rf7 27. Rf3 Rb8 28. b7 Ng3+
29. hxg3 Bg4 30. Qxa4 hxg3 31. Rxg3
Qh4+ 32. Rh3 Bxh3 33. gxh3 Qxh3
10 2:26 ++ 26. g4!!
10 2:42 3.44 26. g4 hxg3 27. Bxa8 gxh2 28. Rf3 Qd6
29. Qc2 Be6 30. Nxe6 Rxa8
Bob
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