Author: Jarkko Pesonen
Date: 05:17:01 04/17/00
Go up one level in this thread
On April 14, 2000 at 12:27:48, Stefan Meyer-Kahlen wrote:
>On April 13, 2000 at 19:54:41, Will Singleton wrote:
>
>>On April 13, 2000 at 17:25:43, Will Singleton wrote:
>>
>>>On April 13, 2000 at 10:31:56, Jon Dart wrote:
>>>
>>>>I've been looking at the BT2630 test suite, which I run routinely.
>>>>
>>>>One of the positions is #26:
>>>>
>>>>[D]2r3k1/pbr1q2p/1p2pnp1/3p4/3P1P2/1P1BR3/PB1Q2PP/5RK1 w - - bm f5; id "test 26";
>>>>
>>>>Is f5 really a decisive move here? Currently my program likes g3
>>>>after searching nearly 200 million nodes. At earlier plies it
>>>>selected Re5. They all look pretty reasonable to me. f5 looks
>>>>good : but is it positionally better, or does White get material
>>>>or a decisive attack?
>>>>
>>>
>>>Amateur starts with f5, but drops from a high of about +1 at ply 8 to +0.19 by
>>>ply 12. I would guess that f5 might not be that much better than the others,
>>>but what do the commercials say?
>>>
>>
>>Hiarcs 6, 30 minutes, 300 mhz -- ce 43; pv f5 Ne4 Bxe4 dxe4 fxg6 Rc2 gxh7+ Kh8
>>d5+ e5 d6 Qe6 Rf8+ Kxh7 Qd1 Rxf8 Qxc2 Qxd6 ;
>>
Here is what Crafty has to say:
Crafty version 17.10
hash table memory = 3M bytes.
pawn hash table memory = 1M bytes.
EGTB cache memory = 1M bytes.
7 0.87 0.93 1. f5 gxf5 2. Bxf5 Rc6 3. Qe1 Re8 4.
Qg3+ Qg7 5. Qxg7+ Kxg7 6. Rg3+ Kf8
7-> 0.95 0.93 1. f5 gxf5 2. Bxf5 Rc6 3. Qe1 Re8 4.
Qg3+ Qg7 5. Qxg7+ Kxg7 6. Rg3+ Kf8
8 1.95 1.15 1. f5 gxf5 2. Bxf5 Rc6 3. Rfe1 Ne4
4. Bxe4 dxe4 5. Rg3+ Kf7 6. Qf4+ Qf6
7. Qxe4
8-> 2.26 1.15 1. f5 gxf5 2. Bxf5 Rc6 3. Rfe1 Ne4
4. Bxe4 dxe4 5. Rg3+ Kf7 6. Qf4+ Qf6
7. Qxe4
9 6.20 1.21 1. f5 Ne4 2. Bxe4 dxe4 3. f6 Qf7 4.
Bc3 Ba6 5. Rf4 Bd3
9-> 6.59 1.21 1. f5 Ne4 2. Bxe4 dxe4 3. f6 Qf7 4.
Bc3 Ba6 5. Rf4 Bd3
10 12.49 1.23 1. f5 Ne4 2. Bxe4 dxe4 3. f6 Qf7 4.
Bc3 Ba6 5. Rf4 Bd3 6. Bb4
10-> 13.85 1.23 1. f5 Ne4 2. Bxe4 dxe4 3. f6 Qf7 4.
Bc3 Ba6 5. Rf4 Bd3 6. Bb4
11 29.41 1.08 1. f5 Ne4 2. Bxe4 dxe4 3. f6 Qf7 4.
Rc3 Rxc3 5. Bxc3 Ba6 6. Rf4 Bd3 7.
a3
11-> 32.68 1.08 1. f5 Ne4 2. Bxe4 dxe4 3. f6 Qf7 4.
Rc3 Rxc3 5. Bxc3 Ba6 6. Rf4 Bd3 7.
a3
12 1:10 1.03 1. f5 Ne4 2. Bxe4 dxe4 3. f6 Qf7 4.
Rc3 Rxc3 5. Bxc3 Ba6 6. Rf4 Bd3 7.
a3 h6
12-> 1:18 1.03 1. f5 Ne4 2. Bxe4 dxe4 3. f6 Qf7 4.
Rc3 Rxc3 5. Bxc3 Ba6 6. Rf4 Bd3 7.
a3 h6
13 3:31 1.07 1. f5 Ne4 2. Bxe4 dxe4 3. f6 Qf7 4.
Rc3 Ba6 5. Rf4 Bd3 6. a3 g5 7. Rxc7
Rxc7 8. Rf2
13-> 4:42 1.07 1. f5 Ne4 2. Bxe4 dxe4 3. f6 Qf7 4.
Rc3 Ba6 5. Rf4 Bd3 6. a3 g5 7. Rxc7
Rxc7 8. Rf2
14 9:41 1.02 1. f5 Ne4 2. Bxe4 dxe4 3. f6 Qf7 4.
Qd1 Ba6 5. Rf2 Bd3 6. Qe1 Rc2 7. Ba3
a6 8. Rxc2 Rxc2
14-> 11:20 1.02 1. f5 Ne4 2. Bxe4 dxe4 3. f6 Qf7 4.
Qd1 Ba6 5. Rf2 Bd3 6. Qe1 Rc2 7. Ba3
a6 8. Rxc2 Rxc2
15 40:29 ++ 1. f5!!
15 299:06 1.89 1. f5 Ne4 2. Bxe4 dxe4 3. fxg6 h5 4.
Rg3 Rf8 5. Rf7 Rxf7 6. gxf7+ Kh7 7.
Qg5 Qxg5 8. f8=Q Qf5 9. Qg8+ Kh6 10.
Qh8+ Rh7 11. Bc1+ e3 12. Bxe3+
>>>
>>>>Another one that I'm not passing at present is #13:
>>>>
>>>>[D]2bq3k/2p4p/p2p4/7P/1nBPPQP1/r1p5/8/1K1R2R1 b - - bm Be6; id "test 13";
>>>>
>>>>I used to get Be6, but now on a faster machine it eventually
>>>>switches back to c2+ at ply 12 and holds it.
>>>>
>>>>--Jon
>>>
>>>Mine starts with c2 and stays there, though the score steadily drops, ending at
>>>+2.
>>>
>>
>>
>>Hiarcs 6, 30 minutes, 300 mhz -- ce -31; pv c2+ Kb2 cxd1=Q Rxd1 Ra5 Rf1 Bxg4
>>Qxg4 Rg5 Qf3 a5 h6 d5 exd5 Qd6 Qf8+ Rg8 Qf7 ;
>>
>>I let this one go longer, and about 40 minutes it switched to Be6 with a score
>>of +1.16. I wonder if any program can find this within 15 minutes?
>>
>>Will
>
>Yes, Shredder can I bet many more.
>Here's the output of my latest version on a PII-450:
>
> 8 -> 0:01.59 +3.88 1...c2+ 2.Kb2 cxd1Q 3.Rxd1 Rh3 4.Rf1 Bb7 5.Qf8+ Qxf8
>6.Rxf8+ Kg7 7.Rf7+ Kh6 8.Re7 Rh2+ 9.Kc1 (203.936) 127.9
> 9.01 0:01.68 +4.13++ 1...c2+ 2.Kb2 cxd1Q 3.Rxd1 Rh3 4.Rf1 Be6 5.Qe5+ dxe5
>6.Rf8+ Qxf8 (214.388) 127.0
> 9.01 0:02.59 +4.35 1...c2+ 2.Kb2 cxd1Q 3.Rxd1 Rh3 4.g5 Bb7 5.Rf1 Nd3+
>6.Bxd3 Rxd3 (325.268) 125.3
> 9 -> 0:03.64 +4.35 1...c2+ 2.Kb2 cxd1Q 3.Rxd1 Rh3 4.g5 Bb7 5.Rf1 Nd3+
>6.Bxd3 Rxd3 (464.672) 127.6
>10.01 0:06.39 +4.30 1...c2+ 2.Kb2 cxd1Q 3.Rxd1 Rh3 4.h6 Rh4 5.Rh1 Bxg4
>(806.220) 126.1
>10 -> 0:24.01 +4.30 1...c2+ 2.Kb2 cxd1Q 3.Rxd1 Rh3 4.h6 Rh4 5.Rh1 Bxg4
>(2.925.188) 121.8
>11.01 0:36.57 +4.05-- 1...c2+ 2.Kb2 cxd1Q 3.Rxd1 Rh3 4.h6 Rh4 5.Rf1 Nc2
>6.Qf8+ Qxf8 (4.274.243) 116.8
>11.01 0:43.31 +3.55-- 1...c2+ 2.Kb2 cxd1Q 3.Rxd1 Rh3 4.h6 Rh4 5.Rf1 Nc2
>6.Kxc2 Bxg4 (5.132.136) 118.4
>11.01 0:55.14 +2.66 1...c2+ 2.Kb2 cxd1Q 3.Rxd1 Rh3 4.h6 Be6 5.Bxe6 Nd3+
>6.Rxd3 Rxd3 7.Qxd6 cxd6 (6.543.072) 118.6
>11.02 1:10.53 +2.67++ 1...Be6 2.Qc1 c2+ 3.Kb2 cxd1N+ 4.Kxa3 Nc2+ 5.Qxc2 Ne3
>6.Qc1 Nxc4+ 7.Kb3 Qb8+ 8.Kc2 c5 9.Qa1 (8.340.119) 118.2
>11.02 1:27.07 +3.02++ 1...Be6 2.Qc1 c2+ 3.Kb2 Bxc4 4.Kxa3 c5 5.Kb2 cxd1Q
>6.Qxd1 Qe7 7.dxc5 dxc5 (10.305.192) 118.3
>11.02 1:51.20 +4.65 1...Be6 2.Qc1 c2+ 3.Kb2 Bxc4 4.Kxa3 c5 5.Kb2 cxd1N+
>6.Qxd1 Nd3+ 7.Kc2 Qf6 8.e5 Qf2+ (12.942.339) 116.3
>11 -> 3:04.65 +4.65 1...Be6 2.Qc1 c2+ 3.Kb2 Bxc4 4.Kxa3 c5 5.Kb2 cxd1N+
>6.Qxd1 Nd3+ 7.Kc2 Qf6 8.e5 Qf2+ (20.768.946) 112.4
>12.01 4:31.25 +4.87 1...Be6 2.Qc1 c2+ 3.Kb2 Bxc4 4.Kxa3 c5 5.Kb2 cxd1N+
>6.Rxd1 Nd3+ 7.Rxd3 Bxd3 (30.401.995) 112.0
>
>Stefan
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