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The best move
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Eelco de Groot



Joined: 12 Mar 2006
Posts: 2595
Location: Groningen
PostPost subject: Re: The best move    Posted: Tue Jun 26, 2012 8:27 pm Reply to topic Reply with quote
Jack Lad wrote:
[d] r1r1q1k1/5p1p/b3pBp1/n3P1Q1/p1ppR2P/P2P2PB/2P2P2/R5K1 w - - 0 27
BR :: BR :: BQ :: BK ::
::    ::    :: BP :: BP
BB ::    :: BP WB BP ::
BN    ::    WP    WQ    
BP :: BP BP WR ::    WP
WP    :: WP ::    WP WB
   :: WP ::    WP    ::
WR    ::    ::    WK    

Here black has just blundered with 26...c4? so now white has to decide between 27. Rxd4 or h5 both of which are winning. However which one is stronger and which one does your engine prefer to play? Confused


Hello Mc Mad, here is the result I got last night with an experimental modified verification search as described in the thread from Lucas Braesch. It shows a third possibility for a move that Critter also wanted to play and should be winning, then it goes to one of your other moves. A computer is never afraid of miscalculating so it has very different ideas about what is the best way to win. Its weakness is of course 'ideas'. Fischer went for the 'idea' move h5. But the moves can also transpose. And if Mike says it is a forced mate with h5 being faster probably, then my theory about an idea move is shattered of course Confused I don't know, I was mainly interested in the new search I must confess but I don't have any data to compare yet.


Regards, Eelco

[D]r1r1q1k1/5p1p/b3pBp1/n3P1Q1/p1ppR2P/P2P2PB/2P2P2/R5K1 w - -
BR :: BR :: BQ :: BK ::
::    ::    :: BP :: BP
BB ::    :: BP WB BP ::
BN    ::    WP    WQ    
BP :: BP BP WR ::    WP
WP    :: WP ::    WP WB
   :: WP ::    WP    ::
WR    ::    ::    WK    


Engine: Rainbow Serpent 2.2.4 Build 084 (Q6700, 4 threads, 512 MB)
by Tord Romstad, Marco Costalba and Joona Kiiski

15/12 0:01 +3.92-- 1.h5 cxd3 2.hxg6 fxg6 3.Qh6 Ra7
4.cxd3 Nb3 5.Rd1 Rc3 6.Bf1 Rc2 7.Be2 Nc5
8.Bf3 Nxe4 (2.563.848) 1766

15/19 0:03 +3.52 1.Rg4 Qf8 2.h5 cxd3 3.hxg6 fxg6
4.cxd3 Qf7 5.Qh6 Nb3 6.Rd1 Bb7 7.Rb1 Rc5 (6.125.766) 1983

16/19 0:03 +3.60++ 1.Rg4 Qf8 2.h5 cxd3 3.hxg6 fxg6
4.cxd3 Qf7 5.Qh6 Nb3 6.Rd1 Qf8 7.Rh4 Bxd3 (6.240.449)1970

16/19 0:03 +3.68 1.h5 cxd3 2.hxg6 fxg6 3.cxd3 Nb3
4.Rd1 Rc7 5.Qh6 Bb7 6.Re2 Bd5 7.Ree1 Qf8
8.Qc1 (7.729.705) 2013

17/19 0:04 +3.42-- 1.h5 cxd3 2.hxg6 fxg6 3.cxd3 Nb3
4.Rd1 Rc7 5.Qh6 Bb7 6.Re2 Qd7
7.Bxe6+ Qxe6 8.Re4 (9.296.241) 2075

17/23 0:05 +3.51 1.h5 cxd3 2.cxd3 Nb3 3.Rd1 Rc7 4.Rh4 Bb7
5.Qh6 Qf8 6.hxg6 Qxh6 7.Rxh6 fxg6
8.Bxe6+ Kf8 9.Bg4 Bd5 10.f4 Re8
11.Bg5 (10.446.889) 2066

18/24 0:05 +3.25-- 1.h5 cxd3 2.cxd3 Nb3 3.Rd1 Rc7 4.Rh4 Bb7
5.Qh6 Qf8 6.hxg6 Qxh6 7.Rxh6 fxg6
8.Bxe6+ Kf8 9.Bg4 Bd5 10.Be2 Kg8
11.e6 Bxe6 (11.345.668) 2085

18/24 0:05 +3.23 1.h5 cxd3 2.cxd3 Nb3 3.Rd1 Rc7 4.Rh4 Bb7
5.Qh6 Qf8 6.hxg6 Qxh6 7.Rxh6 fxg6
8.Bxe6+ Kf8 9.Bg4 Re8 10.f4 Kg8
11.Re1 Rc2 12.Bd1 Ra2 13.Bg4 Rc2 (11.963.911) 2094

19/27 0:20 +3.31++ 1.h5 cxd3 2.Rh4 dxc2 3.hxg6 fxg6
4.Rxh7 c1Q+ 5.Rxc1 Rxc1+ 6.Kh2 Rc6
7.Rh8+ Kf7 8.Rxe8 Kxe8 9.Qxg6+ Kd7
10.Qf7+ Kc8 (48.068.690) 2308

19/27 0:22 +3.39++ 1.h5 cxd3 2.Rh4 dxc2 3.hxg6 fxg6
4.Rxh7 c1Q+ 5.Rxc1 Rab8 6.Rxc8 d3
7.Rxe8+ Rxe8 (52.429.818) 2312

19/28 0:46 +3.51++ 1.h5 cxd3 2.cxd3 Nb3 3.hxg6 fxg6
4.Be7 Rc6 5.Rd1 Nc1 6.Bxe6+ Rxe6
7.Qxc1 Rxe7 (110.167.619) 2377

19/28 0:48 +3.69++ 1.h5 cxd3 2.cxd3 Nb3 3.hxg6 fxg6
4.Be7 Rc6 5.Rd1 Qf7 6.Rf4 Qg7 7.Bg2 Bb7
8.Bf3 (115.307.118) 2372

19/30 1:19 +3.96 1.dxc4 Bb7 2.Rxd4 Nxc4 3.Rd7 Na5
4.Rad1 Rxc2 5.Qh6 Nc4 6.Rxb7 Nxe5 (188.718.541) 2365

20/30 1:23 +3.96 1.dxc4 Bb7 2.Rxd4 Nxc4 3.Rd7 Qxd7
4.Qh6 Qd1+ 5.Rxd1 Nxa3 6.Bxe6 Rc3 (196.105.049) 2362

21/33 2:14 +4.04++ 1.dxc4 Bb7 2.Rxd4 (316.481.406) 2348

21/39 3:21 +4.12++ 1.dxc4 Rxc4 2.h5 Rxc2 3.hxg6 fxg6
4.Rxd4 Qc6 5.Rd6 Rf8 6.Rxc6 (474.825.942) 2359

21/39 4:15 +4.24 1.dxc4 Rxc4 2.h5 Bb7 3.hxg6 fxg6
4.Qh6 Rc7 5.Rxd4 Qc6 6.Bf1 Qf3
7.Rxa4 Qc3 8.Rb1 Qxc2 (602.921.523) 2355

22/39 5:16 +4.24 1.dxc4 Rxc4 2.h5 Bb7 3.hxg6 fxg6
4.Qh6 Rc7 5.Rxd4 Qc6 6.Bf1 Qf3
7.Rxa4 Qc3 8.Rb1 Qxc2 (744.280.932) 2350

23/39 5:49 +4.32++ 1.dxc4 Rxc4 2.h5 Bb7 3.hxg6 fxg6
4.Qh6 Rc7 5.Rxd4 Qc6 6.Bf1 Qf3
7.Rxa4 Qc3 8.Rd1 Bd5 9.Bd3 Qc5
10.Rb1 Bc6 11.Rf4 Qf8 12.Qxf8+ Kxf8
13.Kf1 Rg7 (819.259.212) 2341

23/46 14:38 +4.40++ 1.dxc4 Nxc4 2.Rxd4 Bb7 3.Rd7 Bd5
4.Rd1 Nb6 5.Re7 Qf8 6.h5 Rc3 7.hxg6 Rxc2 (2.125.510.195) 2420

23/47 19:01 +4.42 1.dxc4 Rd8 2.Bxd8 Qxd8 3.Qxd8+ Rxd8
4.Rd1 Nc6 5.Bf1 Rb8 6.Ree1 Rc8 7.Kg2 Kf8
8.Kf3 h6 9.Kf4 Ke7 10.Be2 g5+
11.hxg5 hxg5+ 12.Ke4 (2.778.559.139) 2435

24/53 24:25 +4.50++ 1.dxc4 Rd8 2.Rd1 Bxc4 3.Bxd8 Qxd8
4.Qxd8+ Rxd8 5.Rexd4 Rd5 (3.584.941.306) 2445

24/56 30:51 +4.56 1.dxc4 Nxc4 2.Rxd4 Nb6 3.h5 Nd5
4.Bg2 Nxf6 5.Bxa8 Nxh5 6.Be4 Be2
7.g4 Ng7 8.Rb1 Bb5 9.Qh6 Bc6 10.Bxc6 Qxc6
11.Rbd1 (4.531.019.245) 2447

25/56 43:13 +4.64 1.dxc4 Nxc4 (6.337.279.603) 2443

26/56 46:51 +4.29-- 1.dxc4 Bb7 2.Rxd4 Rxc4 3.Rxc4 Nxc4
4.Rd1 Nxa3 5.f4 Nxc2 (6.877.556.800) 2446

26/64 74:49 +4.72++ 1.Rxd4 cxd3 2.Rd7 Qxd7 3.Qh6 Qe7 (11.307.132.914) 2518

26/69 84:16 +4.83 1.Rxd4 cxd3 2.Qh6 (12.831.920.579) 2537

27/69 85:59 +4.48-- 1.Rxd4 cxd3 2.Rd6 dxc2 3.Rd7 Qf8
4.Bh8 c1Q+ 5.Rxc1 (13.084.822.108) 2535

27/69 87:21 +4.40-- 1.Rxd4 cxd3 2.cxd3 Nb3 3.Qh6 Qf8
4.Qxg6+ hxg6 (13.282.508.202) 2533

27/69 104:01 +4.91 1.Rxd4 cxd3 2.Rd7 Nc6 3.cxd3 Rab8 (15.971.014.505) 2558

28/69 106:59 +4.55-- 1.Rxd4 cxd3 2.Rd7 Nc6 3.cxd3 Ra7
4.Rd6 Nb8 5.Qe3 Rd7 6.Bg2 Rxd6
7.exd6 Nd7 8.Qa7 (16.410.555.990) 2556

28/69 126:11 +4.99++ 1.Rxd4 cxd3 2.Rd7 (19.549.343.352) 2582

28/69 138:36 +5.11++ 1.Rxd4 Bb7 2.Rd7 Bg2 (21.523.320.887) 2587

28/69 142:46 +5.29++ 1.Rxd4 (22.148.974.808) 2585

28/69 152:18 +5.57++ 1.Rxd4 Bb7 2.Rd7 Qxd7 3.Qh6 Qd4
4.dxc4 Qxf2+ 5.Kxf2 Ra7 6.Bxe6 fxe6
7.Qg7+ (23.616.675.567) 2584

28/69 162:47 +5.17 1.Rxd4 cxd3 2.Rd7 Nc6 3.cxd3 Rd8
4.Rd6 Rxd6 5.exd6 Bc8 6.Bg2 Bd7
7.Rc1 Rb8 8.Bxc6 (25.203.022.305) 2580

29/85 189:26 +5.25++ 1.Rxd4 cxd3 2.Rd7 Nc6 3.cxd3 Rd8
4.Rd6 Rxd6 5.exd6 Rd8 6.Bxd8 (29.489.758.280) 2594

29/85 194:53 +5.33++ 1.Rxd4 cxd3 2.Rd7 Nc6 3.cxd3 Rd8
4.Rd6 (30.339.999.315) 2594

29/85 206:22 +5.45++ 1.Rxd4 Rc7 2.dxc4 Bxc4 3.Bg2 Bd5
4.Qh6 (32.119.496.661) 2594

29/85 248:36 +5.63++ 1.Rxd4 (38.749.585.111) 2597

29/85 373:31 +5.90++ 1.Rxd4 (57.556.071.393) 2568

29/85 482:52 +6.28 1.Rxd4 Ra7 2.dxc4 Bxc4 3.h5 Bd5
4.Qh6 Qf8 5.Qe3 Ra6 6.hxg6 fxg6
7.Qd3 Bc4 8.Qd1 Rb6 9.Rd7 Rb7 10.Rb1 Rbc7
11.Qd2 Nc6 12.Bg2 (74.091.985.881) 2557

30/85 494:44 +5.90-- 1.Rxd4 cxd3 2.cxd3 Nb3 3.Qh6 Qf8
4.Qxg6+ hxg6 5.Bxe6 Nxa1 (75.889.323.715) 2556

30/85 494:50 +5.82-- 1.Rxd4 cxd3 2.cxd3 Nb3 3.Qh6 Qf8
4.Qxf8+ Rxf8 5.Bxe6 Nxa1 6.Rxa4 (75.904.328.196) 2556

30/85 494:58 +5.70-- 1.Rxd4 cxd3 2.cxd3 Nb3 3.Qh6 Qf8
4.Qxf8+ Rxf8 5.Bxe6 Nxa1 6.Rd8 Raxd8 (75.923.415.172) 2556

30/85 497:36 +5.52-- 1.Rxd4 cxd3 (76.345.365.028) 2557

30/85 567:25 +6.36 1.Rxd4 cxd3 2.Rd7 Nc6 (87.223.609.668) 2561

31/85 568:53 +5.96-- 1.Rxd4 cxd3 2.Rd7 Nc6 3.cxd3 Bb5
4.Bg4 Qf8 5.Bf3 (87.449.963.588) 2561

31/85 570:40 +5.88-- 1.Rxd4 cxd3 2.Rd7 Nc6 3.cxd3 Rd8
4.Bxe6 Nd4 5.Bxf7+ Qxf7 6.Rxd8+ Rxd8
7.Bxd8 Bxd3 8.e6 (87.721.261.906) 2561

31/85 768:26 +5.76-- 1.Rxd4 Rc7 2.Qh6 Qf8 3.Qxf8+ Rxf8
4.dxc4 Nxc4 5.Rf4 (120.911.602.813) 2622

31/85 787:54 +6.26 1.Rxd4 Rc7 2.dxc4 Bxc4 3.Rad1 Bd5
4.h5 Rb8 5.Rxd5 exd5 6.e6 fxe6 7.Be5 Qe7
8.Bxe6+ Qxe6 9.Bxc7 Rf8 10.Bxa5 Qf5
11.Qxf5 Rxf5 12.hxg6 hxg6 (123.939.407.681) 2621

best move: Re4xd4 time: 809:42.658 min n/s: 2.621.669 nodes: 123.939.407.681
_________________
Debugging is twice as hard as writing the code in the first
place. Therefore, if you write the code as cleverly as possible, you
are, by definition, not smart enough to debug it.
-- Brian W. Kernighan
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Display posts from previous:   
Subject Author Date/Time
The best move Mc Mad Mon Jun 25, 2012 8:22 am
      Re: Which is the best move? Jesús Muñoz Mon Jun 25, 2012 9:37 am
      Re: The best move Louis Zulli Mon Jun 25, 2012 12:12 pm
            Re: The best move Rodolfo Leoni Mon Jun 25, 2012 12:38 pm
      Re: The best move Matthew R. Brades Mon Jun 25, 2012 4:11 pm
            Re: The best move Terry McCracken Mon Jun 25, 2012 8:04 pm
                  Re: The best move kgburcham Mon Jun 25, 2012 11:25 pm
                        Re: The best move Terry McCracken Mon Jun 25, 2012 11:35 pm
                              Re: The best move Mike Libanan Tue Jun 26, 2012 5:54 am
                                    Re: The best move Terry McCracken Tue Jun 26, 2012 5:59 am
      Re: The best move Terry McCracken Tue Jun 26, 2012 6:01 am
            Re: The best move Mc Mad Tue Jun 26, 2012 11:33 am
                  Re: The best move Louis Zulli Tue Jun 26, 2012 11:40 am
                        Re: The best move Mc Mad Tue Jun 26, 2012 4:09 pm
                              Re: The best move Terry McCracken Tue Jun 26, 2012 9:20 pm
                  Re: The best move Terry McCracken Tue Jun 26, 2012 7:25 pm
                        Re: The best move Dan Astrachan Tue Jun 26, 2012 9:04 pm
                  Re: The best move Roberto Munter Tue Jun 26, 2012 8:39 pm
                  Re: The best move kgburcham Tue Jun 26, 2012 11:34 pm
                        Re: The best move Matthew R. Brades Wed Jun 27, 2012 6:33 am
                        Re: The best move Mc Mad Wed Jun 27, 2012 3:40 pm
                              Re: The best move Terry McCracken Wed Jun 27, 2012 3:51 pm
                              Re: The best move kgburcham Wed Jun 27, 2012 10:12 pm
                  Re: The best move Marek Kwiatkowski Wed Jun 27, 2012 2:00 pm
                        Re: The best move Mc Mad Wed Jun 27, 2012 3:38 pm
      Re: The best move Dan Astrachan Tue Jun 26, 2012 7:32 pm
      Re: The best move Eelco de Groot Tue Jun 26, 2012 8:27 pm
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