Author: Dann Corbit
Date: 16:05:32 07/25/01
Go up one level in this thread
On July 25, 2001 at 18:36:08, James T. Walker wrote:
>This position arose today in a game between Hiarcs 7.32 vs Century 3.2.
>Although Hiarcs searched for 6 minutes on an Athlon 900 with 128M hash and it's
>score dropped from the previous 0.87 to -0.56 it still could not resist the BxN
>which I believe loses. I think almost any move which saves the Bishop keeps
>white alive. Best is probably Kxb4 or Be3. Crafty is very fast to avoid BxN.
>Junior7 is slow but finds it in a little over 1 minute.
>
>[D]8/p4k1p/6p1/8/1p2P1P1/1Kn3P1/3B3P/8 w
Kxb4 is what popped into my head, but I think it probably loses anyway.
Crafty never considers anything except Be3 and Kxb4
White(1): epdpfga jtw.out jtw.epd
PFGA: EPD record: 1
end-game phase
time surplus 0.00 time limit 16:39 (16:39)
nss depth time score variation (1)
9 0.18 -0.11 1. Be3 Nxe4 2. Bxa7 Nf6 3. Kxb4 Nxg4
4. h3 Ne5 5. Bc5
9 -11 18 116153 1. Be3 Nxe4 2. Bxa7 Nf6 3. Kxb4 Nxg4 4. h3 Ne5
5. Bc5
9-> 0.20 -0.11 1. Be3 Nxe4 2. Bxa7 Nf6 3. Kxb4 Nxg4
4. h3 Ne5 5. Bc5
9 -11 20 129117 1. Be3 Nxe4 2. Bxa7 Nf6 3. Kxb4 Nxg4 4. h3 Ne5
5. Bc5
10 0.30 -0.37 1. Be3 a5 2. Bb6 Nxe4 3. Bxa5 Nf6 4.
Bxb4 Nxg4 5. h3 Ne3
10 -37 30 195469 1. Be3 a5 2. Bb6 Nxe4 3. Bxa5 Nf6 4. Bxb4 Nxg4
5. h3 Ne3
10-> 0.48 -0.37 1. Be3 a5 2. Bb6 Nxe4 3. Bxa5 Nf6 4.
Bxb4 Nxg4 5. h3 Ne3
10 -37 48 313793 1. Be3 a5 2. Bb6 Nxe4 3. Bxa5 Nf6 4. Bxb4 Nxg4
5. h3 Ne3
11 0.70 -0.29 1. Be3 Nxe4 2. Bxa7 Nf6 3. Kxb4 Nxg4
4. h3 Ne5 5. Be3 Ke6 6. Kc3
11 -29 70 468228 1. Be3 Nxe4 2. Bxa7 Nf6 3. Kxb4 Nxg4 4. h3 Ne5
5. Be3 Ke6 6. Kc3
11-> 0.92 -0.29 1. Be3 Nxe4 2. Bxa7 Nf6 3. Kxb4 Nxg4
4. h3 Ne5 5. Be3 Ke6 6. Kc3
11 -29 92 616563 1. Be3 Nxe4 2. Bxa7 Nf6 3. Kxb4 Nxg4 4. h3 Ne5
5. Be3 Ke6 6. Kc3
12 1.53 -0.36 1. Be3 a5 2. Bb6 Nxe4 3. Bxa5 Nf6 4.
Bxb4 Nxg4 5. h4 Ke6 6. Kc4 Ne3+ 7.
Kd4
12 -36 153 1049681 1. Be3 a5 2. Bb6 Nxe4 3. Bxa5 Nf6 4. Bxb4
Nxg4 5. h4 Ke6 6. Kc4 Ne3+ 7. Kd4
12 2.43 -0.27 1. Kxb4 Nxe4 2. Be1 Nf6 3. h3 Ke6 4.
Kc5 Ne4+ 5. Kb5 Kd6 6. Ka6 Ng5 7. Bb4+
Ke5
12 -27 243 1679320 1. Kxb4 Nxe4 2. Be1 Nf6 3. h3 Ke6 4. Kc5 Ne4+
5. Kb5 Kd6 6. Ka6 Ng5 7. Bb4+ Ke5
12-> 2.84 -0.27 1. Kxb4 Nxe4 2. Be1 Nf6 3. h3 Ke6 4.
Kc5 Ne4+ 5. Kb5 Kd6 6. Ka6 Ng5 7. Bb4+
Ke5
12 -27 284 1956863 1. Kxb4 Nxe4 2. Be1 Nf6 3. h3 Ke6 4. Kc5 Ne4+
5. Kb5 Kd6 6. Ka6 Ng5 7. Bb4+ Ke5
13 4.17 -0.18 1. Kxb4 Nxe4 2. Be1 Nf6 3. h3 Ke6 4.
Kb5 Ne4 5. Ka6 Ng5 6. h4 Nf3 7. Bc3
13 -18 417 2874736 1. Kxb4 Nxe4 2. Be1 Nf6 3. h3 Ke6 4. Kb5 Ne4
5. Ka6 Ng5 6. h4 Nf3 7. Bc3
13-> 5.17 -0.18 1. Kxb4 Nxe4 2. Be1 Nf6 3. h3 Ke6 4.
Kb5 Ne4 5. Ka6 Ng5 6. h4 Nf3 7. Bc3
13 -18 517 3551720 1. Kxb4 Nxe4 2. Be1 Nf6 3. h3 Ke6 4. Kb5 Ne4
5. Ka6 Ng5 6. h4 Nf3 7. Bc3
14 9.38 -0.30 1. Kxb4 Nxe4 2. Be3 Nf6 3. Bxa7 Nxg4
4. h3 Nf6 5. Bd4 Ke6 6. g4 Ne4 7. Kc4
h6
14 -30 938 6492222 1. Kxb4 Nxe4 2. Be3 Nf6 3. Bxa7 Nxg4 4. h3
Nf6 5. Bd4 Ke6 6. g4 Ne4 7. Kc4 h6
14-> 13.32 -0.30 1. Kxb4 Nxe4 2. Be3 Nf6 3. Bxa7 Nxg4
4. h3 Nf6 5. Bd4 Ke6 6. g4 Ne4 7. Kc4
h6
14 -30 1332 9223448 1. Kxb4 Nxe4 2. Be3 Nf6 3. Bxa7 Nxg4 4. h3
Nf6 5. Bd4 Ke6 6. g4 Ne4 7. Kc4 h6
15 19.51 -0.10 1. Kxb4 Nxe4 2. Be3 Nf6 3. Bxa7 Nxg4
4. h3 Nf6 5. Kc4 Ne4 6. g4 Ke6 7. Bd4
h6 8. Kd3 <HT>
15 -10 1951 13537366 1. Kxb4 Nxe4 2. Be3 Nf6 3. Bxa7 Nxg4 4. h3
Nf6 5. Kc4 Ne4 6. g4 Ke6 7. Bd4 h6 8. Kd3 <HT>
15-> 24.89 -0.10 1. Kxb4 Nxe4 2. Be3 Nf6 3. Bxa7 Nxg4
4. h3 Nf6 5. Kc4 Ne4 6. g4 Ke6 7. Bd4
h6 8. Kd3 <HT>
15 -10 2489 17259740 1. Kxb4 Nxe4 2. Be3 Nf6 3. Bxa7 Nxg4 4. h3
Nf6 5. Kc4 Ne4 6. g4 Ke6 7. Bd4 h6 8. Kd3 <HT>
16 36.94 -0.27 1. Kxb4 Nxe4 2. Be3 Nf6 3. Bxa7 Nxg4
4. h3 Nf6 5. g4 Ne4 6. Be3 Ke6 7. Kc4
h5 8. gxh5 gxh5 9. Kd3
16 -27 3694 24912129 1. Kxb4 Nxe4 2. Be3 Nf6 3. Bxa7 Nxg4 4. h3
Nf6 5. g4 Ne4 6. Be3 Ke6 7. Kc4 h5 8. gxh5 gxh5 9. Kd3
16-> 1:05 -0.27 1. Kxb4 Nxe4 2. Be3 Nf6 3. Bxa7 Nxg4
4. h3 Nf6 5. g4 Ne4 6. Be3 Ke6 7. Kc4
h5 8. gxh5 gxh5 9. Kd3
16 -27 6516 40099504 1. Kxb4 Nxe4 2. Be3 Nf6 3. Bxa7 Nxg4 4. h3
Nf6 5. g4 Ne4 6. Be3 Ke6 7. Kc4 h5 8. gxh5 gxh5 9. Kd3
17 1:48 -0.26 1. Kxb4 Nxe4 2. Be3 Nf6 3. Bxa7 Nxg4
4. h3 Nf6 5. Bb8 Ne4 6. Kc4 Ke6 7.
Bc7 Nf2 8. h4 Ne4 9. Kd3
17 -26 10831 61426104 1. Kxb4 Nxe4 2. Be3 Nf6 3. Bxa7 Nxg4 4. h3
Nf6 5. Bb8 Ne4 6. Kc4 Ke6 7. Bc7 Nf2 8. h4 Ne4 9. Kd3
17-> 2:43 -0.26 1. Kxb4 Nxe4 2. Be3 Nf6 3. Bxa7 Nxg4
4. h3 Nf6 5. Bb8 Ne4 6. Kc4 Ke6 7.
Bc7 Nf2 8. h4 Ne4 9. Kd3
17 -26 16361 90908496 1. Kxb4 Nxe4 2. Be3 Nf6 3. Bxa7 Nxg4 4. h3
Nf6 5. Bb8 Ne4 6. Kc4 Ke6 7. Bc7 Nf2 8. h4 Ne4 9. Kd3
18 4:29 -0.39 1. Kxb4 Nxe4 2. Be3 Nf6 3. Bxa7 Nxg4
4. h3 Nf6 5. g4 Ne4 6. h4 Ke6 7. Bd4
Kd5 8. Bb6 Ke5 9. Bc7+ Kf6 10. Kc4
18 -39 26945 141112996 1. Kxb4 Nxe4 2. Be3 Nf6 3. Bxa7 Nxg4 4. h3
Nf6 5. g4 Ne4 6. h4 Ke6 7. Bd4 Kd5 8. Bb6 Ke5 9. Bc7+ Kf6 10. Kc4
Personally, I would play e5, hoping to evenually get the right side formation
looking something like this:
[D]8/p4k1p/6p1/4P1P1/1p3B1P/1Kn3P1/8/8 w - -
Which would allow me time to deal with the left hand problem pawns. If I was
unable to achieve that, I would resign [well, if I was playing someone good or a
chess engine I would resign -- against an average player I would play on and
hope for a blunder].
Yace likes Be3:
white ( 1): test jtw.ci
title position 1
Stored 0 learned positions into hash table
solution Bxc3?
usetime = 998.00, mintime = 998.00 maxtime = 998.00 tl 998.00 ml 0
3 0.008 0.86 1t 1.Bxc3 bxc3 2.Kxc3 {80}
18 0.009 0.86 1. 1.Bxc3 bxc3 2.Kxc3 {80}
30 0.009 0.86 2t 1.Bxc3 bxc3 2.Kxc3H {80}
151 0.010 0.86 2. 1.Bxc3 bxc3 2.Kxc3 {80}
339 0.011 0.69 3t 1.Bxc3 bxc3 2.g5 Ke6 {0}
578 0.011 0.75 3t+ 1.e5 a5 {10}
646 0.012 0.75 3t 1.e5 a5 2.Bxc3 {350}
690 0.012 0.75 3. 1.e5 a5 2.Bxc3 {350}
1166 0.013 0.33 4-- 1.e5 Ke6 2.g5 Nd5 {10}
1561 0.014 -0.23 4t 1.e5 Ke6 2.Kxb4 Nd5+ 3.Kc5H {90}
1635 0.014 0.30 4t+ 1.Bxc3 h5
1951 0.015 0.86 4t 1.Bxc3 bxc3 2.Kxc3 Ke6 3.Kd4H {80}
2384 0.016 0.86 4. 1.Bxc3 bxc3 2.Kxc3 Ke6 3.Kd4 {80}
6932 0.023 0.62 5t 1.Bxc3 bxc3 2.Kxc3 Ke6 3.Kd4 a5 4.h4 a4 5.g5
{80}
8660 0.026 0.62 5. 1.Bxc3 bxc3 2.Kxc3 Ke6 3.Kd4 a5 4.h4 a4 5.g5
{80}
20766 0.045 0.41 6t 1.Bxc3 bxc3 2.Kxc3 Ke6 3.Kd4 a5 4.Kc4 Ke5 5.Kb5
g5 {80}
25020 0.053 0.41 6. 1.Bxc3 bxc3 2.Kxc3 Ke6 3.Kd4 a5 4.Kc4 Ke5 5.Kb5
g5 {80}
52644 0.095 0.41 7t 1.Bxc3 bxc3 2.Kxc3 Ke6 3.Kd4 a5 4.Kc4 Ke5 5.Kb5
g5 6.Kxa5 {160}
65303 0.118 0.41 7. 1.Bxc3 bxc3 2.Kxc3 Ke6 3.Kd4 a5 4.Kc4 Ke5 5.Kb5
g5 6.Kxa5 {160}
195545 0.313 0.53 8t 1.Bxc3 bxc3 2.Kxc3 Ke6 3.Kd4 a5 4.h4 a4 5.Kc4
h6 6.Kb4 Ke5 7.Kxa4H Kxe4H {80}
220456 0.351 0.53 8. 1.Bxc3 bxc3 2.Kxc3 Ke6 3.Kd4 a5 4.h4 a4 5.Kc4
h6 6.Kb4 Ke5 7.Kxa4 Kxe4 {80}
482891 0.756 0.46 9t 1.Bxc3 bxc3 2.Kxc3 Ke6 3.Kd4 h6 4.h4 g5 5.e5 a5
6.Ke4H a4H 7.Kd4H {80}
556635 0.870 0.46 9. 1.Bxc3 bxc3 2.Kxc3 Ke6 3.Kd4 h6 4.h4 g5 5.e5 a5
6.Ke4 a4 7.Kd4 {80}
1542904 2.310 0.49 10t 1.Bxc3 bxc3 2.Kxc3 Ke6 3.Kd4 a5 4.h4 h5 5.g5 a4
6.Kc4 a3 7.Kb3 Ke5 8.Kxa3H Kxe4H {80}
1666150 2.495 0.49 10. 1.Bxc3 bxc3 2.Kxc3 Ke6 3.Kd4 a5 4.h4 h5 5.g5 a4
6.Kc4 a3 7.Kb3 Ke5 8.Kxa3 Kxe4 {80}
3223915 4.815 0.17 11t 1.Bxc3 bxc3 2.Kxc3 Ke6 3.Kd4 h6 4.h3 a5 5.h4
g5H 6.Kc4H Ke5H 7.Kd3H a4H {80}
4066605 6.177 0.18 11t+ 1.Be3 a5 2.Bb6 Nxe4 3.Bxa5 Nf2 4.g5 Nh3 5.Bxb4
Nxg5 6.g4 Ke6 7.h4 {10}
4163564 6.313 0.20 11t 1.Be3 a5 2.Bb6 Nxe4 3.Bxa5 Nf2 4.g5 Ne4H
5.Bxb4H Nxg5H 6.g4H h5H 7.h4H {10}
4198808 6.368 0.20 11. 1.Be3 a5 2.Bb6 Nxe4 3.Bxa5 Nf2 4.g5 Ne4 5.Bxb4
Nxg5 6.g4 h5 7.h4 {10}
4888219 7.434 0.10 12t 1.Be3 a5 2.Bb6 Nxe4 3.Bxa5 Nf2 4.g5 Ne4 5.Bxb4
Nxg5 6.Kc4 h5 7.Kd5 Kf6H {10}
6505370 9.953 0.11 12t+ 1.Kxb4 Nxe4 2.Be3 Nf6 3.Bxa7 Nxg4 4.h3 Ne5
5.Kc3 h5 6.Be3 Ke6 7.Kd4 Nd3 {10}
6990284 10.658 0.13 12t 1.Kxb4 Nxe4 2.Be3 Nf6 3.Bxa7 Nxg4 4.h3 {10}
7413889 11.296 0.13 12. 1.Kxb4 Nxe4 2.Be3 Nf6 3.Bxa7 Nxg4 4.h3 {10}
9636198 15.008 0.18 13t 1.Kxb4 Nxe4 2.Be3 Nf6 3.Bxa7 Nxg4 4.h3 Ne5
5.Be3 h5 6.Kc3H g5H 7.Bxg5H Nf3H 8.g4H hxg4H
{10}
12090095 18.765 0.18 13. 1.Kxb4 Nxe4 2.Be3 Nf6 3.Bxa7 Nxg4 4.h3 Ne5
5.Be3 h5 6.Kc3 g5 7.Bxg5 Nf3 8.g4 hxg4 {10}
17066460 27.079 0.10 14t 1.Kxb4 Nxe4 2.Be3 Nf6 3.Bxa7 Nxg4 4.h3 Ne5
5.Be3 h5 6.Kc3 Ke6 7.Kd4 Nf3+ 8.Ke4 Ne5 {10}
19080588 30.496 0.11 14t+ 1.Be3 a5 2.Bb6 Nxe4 3.Bxa5 Nf2 4.g5 Ne4 5.Bxb4
Nxg5 6.Kc4 Ne4 7.g4 Ke6 8.h3 Nd6+ 9.Bxd6 Kxd6
{HT} {0}
20246946 32.264 0.13 14t 1.Be3 a5 2.Bb6 Nxe4 3.Bxa5 Nf2 4.g5 Ne4H 5.h4H
Nxg3H 6.Bxb4H Ke6H 7.Ba5H Ne4H 8.Kc4H {HT}
27986168 44.105 0.13 14. 1.Be3 a5 2.Bb6 Nxe4 3.Bxa5 Nf2 4.g5 Ne4 5.h4
Nxg3 6.Bxb4 Ke6 7.Ba5 Ne4 8.Kc4
36096337 57.672 0.14 15t 1.Be3 Nxe4 2.Bxa7 Nf6 3.g5H Nd5H 4.Bc5H Ke6H
5.h4H Ke5H 6.g4H Kf4H 7.Kc4H Ke5H 8.h5H Ke4H
9.hxg6H hxg6H 10.Bxb4H Nxb4H {HT} {-260}
46923044 1:15.0 0.14 15. 1.Be3 Nxe4 2.Bxa7 Nf6 3.g5 Nd5 4.Bc5 Ke6 5.h4
Ke5 6.g4 Kf4 7.Kc4 Ke5 8.h5 Ke4 9.hxg6 hxg6
10.Bxb4 Nxb4 {HT} {-260}
76324932 2:06.3 0.10 16t 1.Be3 a5 2.Bb6 Nxe4 3.Bxa5 Nf2 4.g5 Ne4 5.Bxb4
Nxg5 6.Kc4H Ke6H {HT} {10}
101758651 2:47.9 0.10 16. 1.Be3 a5 2.Bb6 Nxe4 3.Bxa5 Nf2 4.g5 Ne4 5.Bxb4
Nxg5 6.Kc4 Ke6 7.g4H Kf7H {HT}
132020123 3:56.9 0.08 17t 1.Be3 a5 2.Bb6 Nxe4 3.Bxa5 Nf2 4.g5 Ne4 5.Bd8
Ke6 6.Kxb4 Kf5 7.Kc4 Nxg5 8.Kd5 Ne4 9.g4+ Kf4
{HT} {10}
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