Author: Dann Corbit
Date: 19:19:08 11/03/03
Go up one level in this thread
On November 03, 2003 at 21:37:36, Dann Corbit wrote:
[snip]
>>[D]5r2/pp1RRrk1/4Qq1p/1PP3p1/8/4B3/1b3P1P/6K1 w - - 0 1
>>
>>intended solution: 1.Qxf7+ Rxf7 2.Rxf7+ Qxf7 3.c6! bc6 4.bc6 Be5 5.Bd4! +-
>>alternate solution: 1.Rxf7 Rxf7 2.Qxf7+ Qxf7 transposes
>
>First two solutions are clearly transpositions. The third choice also appears
>to win.
>
>5r2/pp1RRQk1/5q1p/1PP3p1/8/4B3/1b3P1P/6K1 b - - acd 18; acn 72608893; acs 121;
>ce -437; pv Rxf7 Rxf7+ Qxf7 c6 bxc6 bxc6 Be5 Bd4 Bxd4 Rxf7+ Kxf7 c7 Bb6 c8=Q Kf6
>Qh8+ Kg6 Qg8+ Kh5 Kg2 Kh4 Qe6 Kh5 Kf3;
Ruffian analysis of the non-transposition alternative:
E:\programme\winboard\Arena\Engines\Ruffian>ruffian_105 -h 300M -T \hmm.epd -t
999 -p 99
Hash size 314572800
Ruffian 1.0.5
feature done=0
Loading configuration: ruffian.cfg
Logfile: Mon Nov 03 19:00:48 2003
Total hash size 300M
Initializing tablebases: e:/programme/winboard/nalimov
Testing \hmm.epd, 999 seconds, extra ply 99
Testing: test 1 Solution: Rxe7
[D]5r2/pp1RRrk1/5q1p/1PP3p1/4Q3/4B3/1b3P1P/6K1 b - -
Depth Time Score Best line
8/20 1.04 x.xx ... Rxe7
8--> 1.89 -2.15 ... a6 b6 Qc6 Bd4+ Bxd4 Qxd4+ Kg8 Rxb7 Qxb7 Rxb7
Rxb7
9/21 2.08 -- ... a6
9/21 3.52 -3.82 ... a6 Rxf7+ Rxf7 Qxb7 Rxd7 Qxd7+ Kh8 c6 Be5 b6 Qg6
c7 Qb1+ Kg2
9/21 3.60 x.xx ... Rxe7
9/21 4.01 -2.43 ... Rxe7 Rxe7+ Rf7 Rxb7 Bc3 c6 Rxb7 cxb7 Qd6 Bxa7
Qd1+ Kg2
9--> 5.39 -2.43 ... Rxe7 Rxe7+ Rf7 Rxb7 Bc3 c6 Rxb7 cxb7 Qd6 Bxa7
Qd1+ Kg2
10/23 5.80 -- ... Rxe7
10/25 6.81 -3.27 ... Rxe7 Rxe7+ Rf7 Rxb7 Rxb7 Qxb7+ Kg6 Qxa7 Qf5 Qb6+
Bf6 c6 Qf3
10/25 11.30 x.xx ... Qg6
10/25 13.08 -3.03 ... Qg6 Qxg6+ Kxg6 Rxb7 Rxe7 Rxe7 Rb8 c6 Bf6 Rb7
Rxb7 cxb7 Be5 Bxa7
10--> 15.67 -3.03 ... Qg6 Qxg6+ Kxg6 Rxb7 Rxe7 Rxe7 Rb8 c6 Bf6 Rb7
Rxb7 cxb7 Be5 Bxa7
11/27 18.79 -3.18 ... Qg6 Qxg6+ Kxg6 Rxb7 Rxe7 Rxe7 a5 bxa6 Bf6 Rb7
Ra8 a7 Kf5 c6
11/27 19.37 x.xx ... Rxe7
11/27 21.43 -3.10 ... Rxe7 Rxe7+ Rf7 Rxb7 Be5 Rxf7+ Kxf7 Qh7+ Kf8 Qxa7
Qd8 Qa4 Qb8 h3 Qc7
11--> 28.33 -3.10 ... Rxe7 Rxe7+ Rf7 Rxb7 Be5 Rxf7+ Kxf7 Qh7+ Kf8 Qxa7
Qd8 Qa4 Qb8 h3 Qc7
12/29 33.51 -3.11 ... Rxe7 Rxe7+ Rf7 Rxb7 Rxb7 Qxb7+ Kg6 Qxa7 Qf5 Qa6+
Bf6 Qa4 Qb1+ Kg2 Qe1 Qe4+ Kh5
12--> 52.34 -3.11 ... Rxe7 Rxe7+ Rf7 Rxb7 Rxb7 Qxb7+ Kg6 Qxa7 Qf5 Qa6+
Bf6 Qa4 Qb1+ Kg2 Qe1 Qe4+ Kh5
13/32 1:00 -- ... Rxe7
13/32 1:02 -3.42 ... Rxe7 Rxe7+ Rf7 Rxb7 Rxb7 Qxb7+ Kg6 Qxa7 Qf3 Qd7
Qe4
13--> 2:10 -3.42 ... Rxe7 Rxe7+ Rf7 Rxb7 Rxb7 Qxb7+ Kg6 Qxa7 Qf3 Qd7
Qe4
14/34 2:31 -3.52 ... Rxe7 Rxe7+ Rf7 Rxb7 Rxb7 Qxb7+ Kg6 Qxa7 Qf5 Qa4
Qb1+ Kg2 Qd3 c6 Be5 b6 Qe2
14--> 4:09 -3.52 ... Rxe7 Rxe7+ Rf7 Rxb7 Rxb7 Qxb7+ Kg6 Qxa7 Qf5 Qa4
Qb1+ Kg2 Qd3 c6 Be5 b6 Qe2
15/35 5:09 -- ... Rxe7
15/35 6:03 -3.94 ... Rxe7 Rxe7+ Rf7 Rxb7 Be5 c6 Qd6 Rxf7+ Kxf7 h3
Ke6 Bxa7 Qd1+ Kg2 Qd5 Qxd5+ Kxd5 Bb6 Ke6 Kf3
15/36 7:39 x.xx ... Qg6
15--> 13:16 -3.94 ... Rxe7 Rxe7+ Rf7 Rxb7 Be5 c6 Qd6 Rxf7+ Kxf7 h3
Ke6 Bxa7 Qd1+ Kg2 Qd5 Qxd5+ Kxd5 Bb6 Ke6 Kf3
16/39 15:39 -3.94 ... Rxe7 Rxe7+ Rf7 Rxb7 Be5 c6 Qd6 Rxf7+ Kxf7 h3
Ke6 Bxa7 Qd1+ Kg2 Qd5 Qxd5+ Kxd5 Kf3 Bf4 Bb6 Ke6
16... 16:28 3/35 a6
Time: 16:39, cpu 94.39%, nodes 583628521, nps 584201
Hash: 128M, used 100%, hits 25%
EGTB: probs 23, hits 23
Best move: Rxe7 (-3.94) Solved (1/1)
Time: 16:39, Average: 21.53, Nodes: 583628521, nps: 583600
Summery: 1/1
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