Author: Bernhard Bauer
Date: 02:56:37 09/08/05
Go up one level in this thread
On September 08, 2005 at 05:22:49, Richard Pijl wrote:
>The following position occurred in a game The Baron - Amyan in the RWBC class A:
>
>[D]r1bq1rk1/1pppnppp/pbn5/4P1B1/B3N3/5N2/PP3PPP/R2Q1RK1 w - -
>
>Amyan just castled into trouble. Nf6+ wins material, but when black is not
>careful (which Amyan wasn't) it will step into a mate soon.
>Apparently this is easy for some, difficult for others. I've tried the following
>engines, sorted by solution time:
>
>Spike 1.0a 0:06
>SOS 4 0:15
>Nejmet 3.07 0:21
>The Baron 1.7.0 0:22
>Fruit 2.1 0:35
>AnMon 5.50 1:01
>Zappa 1.1 1:29
>Ruffian 1.0.5 3:16
>Yace Paderborn 3:34
>Dragon 4.6 > 5
>
>Hardware: Xeon 2.8Ghz 150Mb hash
>
>game:
>
>[Event "RWBC_Class_A_5th_Edition"]
>[Site "ESPRESSO"]
>[Date "2005.09.07"]
>[Round "12"]
>[Number "247"]
>[White "Baron_170"]
>[Black "Amyan_1597"]
>[Result "1-0"]
>[TimeControl "40/900"]
>
>1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. d4 exd4 {-0.03/11} 6. O-O
>Bc5 {+0.02/11} 7. e5 Ng8 {+0.04/11} 8. c3 dxc3 {+0.03/12} 9. Nxc3
>Nge7 {+0.07/11} 10. Ne4 Bb6 {+0.31/11} 11. Bg5 {-0.08/10} O-O {+0.18/10}
>12. Nf6+ {+2.61/10} gxf6 {+0.20/12} 13. Bxf6 {+4.31/10} Qe8 {-1.78/11} 14.
>Qc1 {+327.56/11} Nxe5 {-5.81/11} 15. Nxe5 {+327.58/20}
>{Black resigns} 1-0
I ran this position with Crafty 20.0, binary from Bryan Hofmann
and with my own small search modification.
Original: Nf6 not found within 5:00
Modified:
7. Nxe5
9-> 22.55 -0.24 1. Bxc6 bxc6 2. Qd2 Qe8 3. Be3 Bxe3
4. fxe3 Nd5 5. Qd4 f6 6. Rad1 fxe5
7. Nxe5
10 36.75 -0.28 1. Bxc6 bxc6 2. Qc2 a5 3. Bxe7 Qxe7
4. Neg5 g6 5. Ne4 Kh8 6. Nf6 a4
10 1:10 -0.15 1. Qd2 Ba5 2. Qf4 h6 3. Bxe7 Qxe7 4.
Rad1 b5 5. Bb3 Bb7 6. Bd5
10 1:26 0.01 1. Nf6+ gxf6 2. Bxf6 h6 3. Qd2 Kh7
4. Ng5+ Kg8 5. Nf3
10-> 1:27 0.01 1. Nf6+ gxf6 2. Bxf6 h6 3. Qd2 Kh7
4. Ng5+ Kg8 5. Nf3
11 1:52 +1 1. Nf6+!!
11 2:07 1.23 1. Nf6+ gxf6 2. Bxf6 Qe8 3. Bxc6 dxc6
4. Qd2 Bf5 5. Qg5+ Ng6 6. Qxf5 Qe6
7. Qxe6 fxe6 8. Rad1
11-> 2:12 1.23 1. Nf6+ gxf6 2. Bxf6 Qe8 3. Bxc6 dxc6
4. Qd2 Bf5 5. Qg5+ Ng6 6. Qxf5 Qe6
7. Qxe6 fxe6 8. Rad1
12 2:58 +1 1. Nf6+!!
12 4:00 +3 1. Nf6+!!
time=5:00 mat=-1 n=315164534 fh=94% nps=1.05M
ext-> chk=10861087 cap=1744242 1rep=1244828 mate=46466
predicted=0 nodes=315164534 evals=60151590 50move=0
endgame tablebase-> probes=0 hits=0
hashing-> 18%(raw) 16%(depth) 96%(sat) 99%(pawn)
hashing-> 0%(exact) 9%(lower) 1%(upper)
Hardware: AMD XP 1800 MHz
Kind regards
Bernhard
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.