Author: Mike Byrne
Date: 11:22:29 03/06/05
Go up one level in this thread
On March 06, 2005 at 09:46:02, Jouni Uski wrote:
>These positions remain unsolved years now in 10 minutes:
>
>[D]1q1r3k/3P1pp1/ppBR1n1p/4Q2P/P4P2/8/5PK1/8 w - - bm Rxf6
>[D]r1b1k2r/pp3ppp/4pb2/2n5/3RB3/4BN2/PqP1QPPP/3R2K1 w kq - bm Rd8+
>
>Any solutions?
>
>Jouni
For #2, not solved after a 20 minute 5.3 billion node search although I beleive
it is consider the second best move. Ng5 here looks very good here and maybe
better than Rd8.
Seaching just Rd8, it is a point behind Ng5 after a 15 ply search..
15-> 6:59 0.66 1. Rd8+ Bxd8 2. Bxc5 Be7 3. Qd2 f5
4. Bxe7 Kxe7 5. Bxf5 g6 6. Be4 Kf7
7. Qh6 Ke8 8. Qg5 Kf7 9. Ne5+ Kg7
Black(1): r1b1k2r/pp3ppp/4pb2/2n5/3RB3/4BN2/PqP1QPPP/3R2K1 w kq - bm Rd8+
White(1): go
time surplus 29.92 time limit 20:00 (20:00)
depth time score variation (1)
starting thread 1
8 0.60 0.46 1. Ng5 h6 2. Nh7 Bxd4 3. Bxd4 Qb4 4.
Bxg7 Qxe4 5. Qxe4 Nxe4 6. Bxh8
8-> 0.89 0.46 1. Ng5 h6 2. Nh7 Bxd4 3. Bxd4 Qb4 4.
Bxg7 Qxe4 5. Qxe4 Nxe4 6. Bxh8
9 1.99 0.75 1. Ng5 Bd7 2. R4d2 Bxg5 3. Bxg5 Qe5
4. Qe3 Nxe4 5. Rxd7 O-O 6. Rxb7
9-> 2.57 0.75 1. Ng5 Bd7 2. R4d2 Bxg5 3. Bxg5 Qe5
4. Qe3 Nxe4 5. Rxd7 O-O 6. Rxb7
10 5.55 1.13 1. Ng5 Bxd4 2. Bxd4 Qa3 3. Bxh7 Bd7
4. Bxg7 O-O-O 5. Bxh8 Rxh8
10-> 6.82 1.13 1. Ng5 Bxd4 2. Bxd4 Qa3 3. Bxh7 Bd7
4. Bxg7 O-O-O 5. Bxh8 Rxh8
11 19.14 1.16 1. Ng5 Bd7 2. Qf3 Rc8 3. R4d2 Bxg5
4. Bxg5 f5 5. Bxb7 Rc7 6. Ba8 O-O
11-> 23.33 1.16 1. Ng5 Bd7 2. Qf3 Rc8 3. R4d2 Bxg5
4. Bxg5 f5 5. Bxb7 Rc7 6. Ba8 O-O
12 48.14 1.24 1. Ng5 h6 2. R4d2 O-O 3. Bxc5 Bxg5
4. f4 Bxf4 5. Rd8 Bxh2+ 6. Kh1 Bd6
7. R1xd6 Qxa2 8. Rxf8+ Kxf8
12-> 1:04 1.24 1. Ng5 h6 2. R4d2 O-O 3. Bxc5 Bxg5
4. f4 Bxf4 5. Rd8 Bxh2+ 6. Kh1 Bd6
7. R1xd6 Qxa2 8. Rxf8+ Kxf8
13 2:14 1.37 1. Ng5 Bd7 2. Qf3 Bxg5 3. Bxg5 O-O
4. Bxh7+ Kxh7 5. Bf6 Qxc2 6. Qh5+ Kg8
7. Bxg7 Qh7 8. Qxc5 b6 9. Qe7
13-> 3:18 1.37 1. Ng5 Bd7 2. Qf3 Bxg5 3. Bxg5 O-O
4. Bxh7+ Kxh7 5. Bf6 Qxc2 6. Qh5+ Kg8
7. Bxg7 Qh7 8. Qxc5 b6 9. Qe7
14 5:19 1.66 1. Ng5 Bd7 2. Qf3 Bxg5 3. Bxg5 O-O
4. Bxh7+ Kxh7 5. Rh4+ Kg8 6. Qh3 f6
7. Rh8+ Kf7 8. Qh5+ Ke7 9. Be3 Nb3
10. Bc5+ Nxc5 11. Qxc5+ Kf7 12. Rxd7+
14-> 8:08 1.66 1. Ng5 Bd7 2. Qf3 Bxg5 3. Bxg5 O-O
4. Bxh7+ Kxh7 5. Rh4+ Kg8 6. Qh3 f6
7. Rh8+ Kf7 8. Qh5+ Ke7 9. Be3 Nb3
10. Bc5+ Nxc5 11. Qxc5+ Kf7 12. Rxd7+
(s=2)
15 13:20 1.68 1. Ng5 Bd7 2. Qf3 Rc8 3. Nxh7 Nxe4
4. Rxd7 Rxh7 5. Qxe4 Rh4 6. Qf3 Qe5
7. h3 Qe4 8. Qxe4 Rxe4 9. Rxb7 Rxc2
10. Rxa7
15 19:45 7/50* 1. Rd6
time=20:00 cpu=32827% mat=-1 n=5330941885 fh=95% nps=4.44M
ext-> chk=398623717 cap=8763266 pp=201930 1rep=27144258 mate=19895
71
predicted=1 nodes=5330941885 evals=719549190 50move=0
endgame tablebase-> probes=0 hits=0
SMP-> split=1231 stop=201 data=9/64 cpu=715240:05 elap=20:00
White(1): Ng5
time used: 20:00
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