Author: Slater Wold
Date: 10:40:57 11/30/03
I posted earlier, that in the following position Fritz blundered with Rg3?
[D]6r1/4kp2/3p1bp1/q2BpP2/2P5/1P5R/1PQ3K1/8 w - - 0 73
Someone followed up, saying Rg3 Rc8 Bb7! was correct, so Qd1 was the blunder. I
don't think I agree, and Crafty 19.6 with a whole bunch of time doesn't either.
fxg6 is an *easy* draw.
6 0.10 -0.75 1. Rh7 gxf5+ 2. Kf2 Qb6+ 3. c5 Qxc5+
4. Qxc5 dxc5 5. Rxf7+ Kd6 6. Rd7+ Kxd7
7. Bxg8
6 0.19 -0.29 1. Rg3 Rc8 2. Qd3 gxf5 3. Qxf5 Qd2+
4. Qf2 Qxf2+ 5. Kxf2 Re8
6-> 0.21 -0.29 1. Rg3 Rc8 2. Qd3 gxf5 3. Qxf5 Qd2+
4. Qf2 Qxf2+ 5. Kxf2 Re8 (s=3)
7 0.28 -0.05 1. Rg3 g5 2. Qe2 Qb4 3. Re3 g4 4. Kg3
(s=2)
7-> 0.33 -0.05 1. Rg3 g5 2. Qe2 Qb4 3. Re3 g4 4. Kg3
8 0.43 -0.11 1. Rg3 g5 2. Qe2 Qb4 3. Re3 Rg7 4.
Kg1 g4
8-> 0.55 -0.11 1. Rg3 g5 2. Qe2 Qb4 3. Re3 Rg7 4.
Kg1 g4 (s=2)
9 0.88 -0.04 1. Rg3 g5 2. b4 Qb6 3. Qd2 Qd4 4. Qxd4
exd4 5. Rd3 g4
9-> 1.32 -0.04 1. Rg3 g5 2. b4 Qb6 3. Qd2 Qd4 4. Qxd4
exd4 5. Rd3 g4 (s=2)
10 2.27 -0.14 1. Rg3 g5 2. Qe2 Qb4 3. Re3 Rg7 4.
Kg1 g4 5. Rg3 Kd7 6. Rxg4 Rxg4+ 7.
Qxg4 Qxb3
10-> 3.43 -0.14 1. Rg3 g5 2. Qe2 Qb4 3. Re3 Rg7 4.
Kg1 g4 5. Rg3 Kd7 6. Rxg4 Rxg4+ 7.
Qxg4 Qxb3 (s=2)
11 7.72 -0.08 1. Rg3 Rc8 2. Bb7 Rh8 3. fxg6 Qe1 4.
g7 Rg8 5. Qh7 Qxg3+ 6. Kxg3 Rxg7+ 7.
Qxg7 Bxg7
11-> 15.27 -0.08 1. Rg3 Rc8 2. Bb7 Rh8 3. fxg6 Qe1 4.
g7 Rg8 5. Qh7 Qxg3+ 6. Kxg3 Rxg7+ 7.
Qxg7 Bxg7 (s=3)
12 19.50 -0.41 1. Rg3 Rc8 2. Bb7 Rh8 3. fxg6 Qe1 4.
Rh3 Rxh3 5. Kxh3 Qe3+ 6. Kg2 fxg6 7.
Be4 g5 (s=2)
12-> 1:03 -0.41 1. Rg3 Rc8 2. Bb7 Rh8 3. fxg6 Qe1 4.
Rh3 Rxh3 5. Kxh3 Qe3+ 6. Kg2 fxg6 7.
Be4 g5 (s=5)
13 1:22 -0.45 1. Rg3 Rc8 2. Be4 gxf5 3. Bxf5 Rh8
4. Qe2 Kd8 5. Rd3 Kc7 6. Rd5 Qb4 7.
Qd2 Qxd2+ 8. Rxd2 Bh4 (s=4)
13-> 2:19 -0.45 1. Rg3 Rc8 2. Be4 gxf5 3. Bxf5 Rh8
4. Qe2 Kd8 5. Rd3 Kc7 6. Rd5 Qb4 7.
Qd2 Qxd2+ 8. Rxd2 Bh4 (s=3)
14 3:45 -0.28 1. Rg3 Rc8 2. Bb7 Rb8 3. fxg6 Rxb7
4. g7 Bxg7 5. Rxg7 Qb4 6. Rg3 Rb8 7.
Qd3 Qb7+ 8. Kf2 Re8 (s=2)
14-> 4:53 -0.28 1. Rg3 Rc8 2. Bb7 Rb8 3. fxg6 Rxb7
4. g7 Bxg7 5. Rxg7 Qb4 6. Rg3 Rb8 7.
Qd3 Qb7+ 8. Kf2 Re8
15 6:04 -0.45 1. Rg3 Rc8 2. Bb7 Rb8 3. fxg6 Rxb7
4. g7 Bxg7 5. Rxg7 Qb4 6. Rg3 Qe1 7.
Qd3 Qc1 8. Qe2 f5
15-> 11:45 -0.45 1. Rg3 Rc8 2. Bb7 Rb8 3. fxg6 Rxb7
4. g7 Bxg7 5. Rxg7 Qb4 6. Rg3 Qe1 7.
Qd3 Qc1 8. Qe2 f5 (s=5)
16 15:14 -0.30 1. Rg3 Rc8 2. Bb7 Rb8 3. fxg6 Rxb7
4. g7 Bxg7 5. Rxg7 Qb4 6. Rg3 Ra7 7.
Rg7 Ra2 8. Kf3 <HT> (s=4)
16-> 24:12 -0.30 1. Rg3 Rc8 2. Bb7 Rb8 3. fxg6 Rxb7
4. g7 Bxg7 5. Rxg7 Qb4 6. Rg3 Ra7 7.
Rg7 Ra2 8. Kf3 <HT> (s=4)
17 39:17 -0.55 1. Rg3 Rc8 2. Bb7 Rb8 3. fxg6 Rxb7
4. g7 Bxg7 5. Rxg7 Qb4 6. Rg3 Rb8 7.
Qd3 Ra8 8. Rg7 Ra2 9. Qc2 Ke6 (s=3)
17 137:09 -0.21 1. fxg6 Rxg6+ 2. Rg3 Rxg3+ 3. Kxg3
Qe1+ 4. Kg2 Bg5 5. Qf5 Qe2+ 6. Kg3
Bf4+ 7. Kh4 Qf2+ 8. Kh5 Qh2+ 9. Kg4
Qg1+ 10. Kh5 Qg7 11. b4 Qh8+ 12. Kg4
Qg8+ 13. Kh5 Qg7 14. b5 Be3
17-> 156:29 -0.21 1. fxg6 Rxg6+ 2. Rg3 Rxg3+ 3. Kxg3
Qe1+ 4. Kg2 Bg5 5. Qf5 Qe2+ 6. Kg3
Bf4+ 7. Kh4 Qf2+ 8. Kh5 Qh2+ 9. Kg4
Qg1+ 10. Kh5 Qg7 11. b4 Qh8+ 12. Kg4
Qg8+ 13. Kh5 Qg7 14. b5 Be3
18 183:28 -0.15 1. fxg6 Rxg6+ 2. Rg3 Rxg3+ 3. Kxg3
Qe1+ 4. Kg2 Bg5 5. Qf5 Qe2+ 6. Kg3
Bf6 7. Qh7 <HT>
18-> 308:07 -0.15 1. fxg6 Rxg6+ 2. Rg3 Rxg3+ 3. Kxg3
Qe1+ 4. Kg2 Bg5 5. Qf5 Qe2+ 6. Kg3
Bf6 7. Qh7 Qe1+ <HT> (s=6)
time=360:00 cpu=199% mat=0 n=28954780325 fh=90% nps=1340k
ext-> chk=-1837317311 cap=62576292 pp=17515987 1rep=165607790 mate
=6239465
predicted=0 nodes=28954780325 evals=3687863267
endgame tablebase-> probes=19683 hits=587
SMP-> split=10307 stop=2452 data=12/4096 cpu=718:58 elap=360:
00
Looking at Rg3 Rc8 Bb7! deeper, it does appear to be a draw also, but has a
*lot* of losing possibilities. Qb1 *was* the real loser here.
Can *anyone* get another engine to even look at Qb1 here? I couldn't.
[D]2r5/4kp2/3p1bp1/q2BpP2/2P5/1P4R1/1PQ3K1/8 w - -
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