"Poor Fish": very hard test suite

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Lyudmil Tsvetkov
Posts: 6052
Joined: Tue Jun 12, 2012 12:41 pm

Re: "Poor Fish": very hard test suite

Post by Lyudmil Tsvetkov »

mcostalba wrote:
Lyudmil Tsvetkov wrote:Hi Marco.

Very nice test!

If I were you, I would collect positions top engines can solve, and not vice-versa, cause I think former ones are considerably less. :)

For fun sake, try this one, from a simulated game with Louis' SF we played back in November 2014 here on the forum.

[d]1r3r2/4bpkp/1qb1p1p1/3pP1P1/p1pP1Q2/PpP2N1R/1Pn1B2P/3RB2K w - - 0 6

best move Qf6, with mate in 25.
Thanks Lyudmil,

here is the result of the DBT test (120+120sec 1 thread 512MB hash, 1.2Mnps):

Code: Select all

 +---+---+---+---+---+---+---+---+
 |   | r |   |   |   | r |   |   |
 +---+---+---+---+---+---+---+---+
 |   |   |   |   | b | p | k | p |
 +---+---+---+---+---+---+---+---+
 |   | q | b |   | p |   | p |   |
 +---+---+---+---+---+---+---+---+
 |   |   |   | p | P |   | P |   |
 +---+---+---+---+---+---+---+---+
 | p |   | p | P |   | Q |   |   |
 +---+---+---+---+---+---+---+---+
 | P | p | P |   |   | N |   | R |
 +---+---+---+---+---+---+---+---+
 |   | P | n |   | B |   |   | P |
 +---+---+---+---+---+---+---+---+
 |   |   |   | R | B |   |   | K |
 +---+---+---+---+---+---+---+---+

Fen: 1r3r2/4bpkp/1qb1p1p1/3pP1P1/p1pP1Q2/PpP2N1R/1Pn1B2P/3RB2K w - - 0 6
Key: 56062F5662BB9942
Checkers: 

Warm-up best move: Rh6, score: cp -184
Forcing best move: Qf6+
After forcing best move, score: cp -89

So I am sorry but test failed, your position if strong (engine failed to find bm in normal search), but not so strong.
Hi Marco, I knew I would have failed, I always fail, unless SF is my direct opponent. :)

Still, I think this is by far the hardest position for engines, I bet top engines will solve it satisfactorily much later after they have solved other test positions, for example the Qe5 sacrifice from Gusev-Averbakh, as it involves deeper search and more intricate eval.

Also, while SF expects black win, the position is a white win, while in most of the remaining test positions above the transition is just from draw to win, loss to draw, etc.

We will check this position and your test suite in 10 years' time, and see who was rigth. :)

Keep up the good work.
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mcostalba
Posts: 2684
Joined: Sat Jun 14, 2008 9:17 pm

Re: "Poor Fish": very hard test suite

Post by mcostalba »

Lyudmil Tsvetkov wrote: Keep up the good work.
I aa really a newbie here in this field, I am just starting now, but what amazes me is that the very hard positions for engines are very difficult but not impossible for humans, in particular it seems to me that are all positions where the winning side has a long term plan.

A tactical combination, even if complex, cannot survive a deep engine search instead winning by along term plan it can. For instance see this study:

https://mcostalba.github.io/PoorFish/positions/pf001

After reading the explanation linked at the bottom of the page it amazes me the deepness of the idea: move now to avoid a zugzwang about 10 moves later! This is a case where engines are blind because they cannot connect the immediate move with something that will occur much later, in one word engines are not able to do long term plans. These kind of positions are very rare and I am motivated to collect them and fully describe and explain them (of course not by me that I am a chess noob). I plan to collect these kind of positions in the site I have pointed out above. Currently there are just 3 and one of them, Grandelius-Raznikov, is not so hard as the others, but I realized it after having built the page, so now it says :-)
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peter
Posts: 3186
Joined: Sat Feb 16, 2008 7:38 am
Full name: Peter Martan

Re: "Poor Fish": very hard test suite

Post by peter »

Thanks for clarifying.

BTW:

Code: Select all

r6r/4k3/p2bP2p/2n2PP1/2BQn2P/1pP1p3/1q1BK3/3R3R b - - 0 1

Analysis by Stockfish 260916 64 POPCNT:
...
  =/+  (-0.60 --)   Tiefe: 26/61   00:01:36  1642MN
1...exd2 2.Th3 Thf8 3.f6+ Sxf6 4.gxf6+ Txf6 5.Txd2 Tf2+ 6.Kxf2 Dxd2+ 7.Dxd2 Se4+ 8.Ke1 Sxd2 9.Kxd2 Lf4+ 10.Kd3 Tb8 11.Tf3 Ld6 12.Tf1 a5 13.Ld5 Tb6 14.Tf7+ Ke8 15.Tb7 Txb7 16.Lxb7 Ke7 17.Lc6 Le5 18.La4 b2 19.Kc2 
  =/+  (-0.64)   Tiefe: 26/61   00:01:39  1701MN
1...Qc2 
  -/+  (-0.72 ++)   Depth: 27/61   00:02:02  2152MN
...
1...Qc2 2.Kxe3 Raf8 3.Rdf1 Kd8 4.Bd5 Nxd2 5.Qxd2 hxg5 6.hxg5 Qxd2+ 7.Kxd2 Rxh1 8.Bxh1 Nxe6 9.Bd5 Nxg5 10.Bxb3 a5 11.Bc2 Ke7 12.Rb1 Bf4+ 13.Ke2 Rd8 14.Bd3 Nh3 15.Be4 Kf6 16.Rb6+ Rd6 17.Rxd6+ Bxd6 18.Bc2 Nf4+ 19.Ke3 Nd5+ 20.Kd4 Ne7 21.c4 Be5+ 22.Ke4 Bc3 23.Ba4 Bb4 24.Kf4 Nxf5 
  -+  (-2.23)   Depth: 27/66   00:03:11  3545MN
...
1...Qc2 2.Kxe3 Raf8 3.Rdf1 Kd8 4.Bd5 Nxd2 5.Qxd2 Qxd2+ 6.Kxd2 hxg5 7.hxg5 Rxh1 8.Bxh1 Nxe6 9.Bd5 Nxg5 10.Bxb3 a5 11.Bd5 Ke7 12.Re1+ Kf6 13.Ra1 Bc7 14.Kd3 Rh8 15.Kc4 Rh3 16.Ra2 Nf3 17.Kc5 Ne5 18.Rc2 Kxf5 19.c4 Kf4 20.Rf2+ Ke3 21.Rg2 Kd3 22.Rg7 Bd8 23.Rg8 Be7+ 24.Kb5 Bb4 25.Rg7 Kd4 
  -+  (-2.57)   Depth: 34/66   00:08:11  9483MN
24 threads, 32G empty hash, latest ultimaiq-compile, no large pages, no numa-option, no assembler- version
Peter.
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peter
Posts: 3186
Joined: Sat Feb 16, 2008 7:38 am
Full name: Peter Martan

Re: "Poor Fish": very hard test suite

Post by peter »

peter wrote:

Code: Select all

r6r/4k3/p2bP2p/2n2PP1/2BQn2P/1pP1p3/1q1BK3/3R3R b - - 0 1

Analysis by Stockfish 260916 64 POPCNT:
...

1...Qc2 
  -/+  (-0.72 ++)   Depth: 27/61   00:02:02  2152MN
...
1...Qc2 2.Kxe3 Raf8 3.Rdf1 Kd8 4.Bd5 Nxd2 5.Qxd2 hxg5 6.hxg5 Qxd2+ 7.Kxd2 Rxh1 8.Bxh1 Nxe6 9.Bd5 Nxg5 10.Bxb3 a5 11.Bc2 Ke7 12.Rb1 Bf4+ 13.Ke2 Rd8 14.Bd3 Nh3 15.Be4 Kf6 16.Rb6+ Rd6 17.Rxd6+ Bxd6 18.Bc2 Nf4+ 19.Ke3 Nd5+ 20.Kd4 Ne7 21.c4 Be5+ 22.Ke4 Bc3 23.Ba4 Bb4 24.Kf4 Nxf5 
  -+  (-2.23)   Depth: 27/66   00:03:11  3545MN
...
Second try after restarting the GUI with same conditions as before:

r6r/4k3/p2bP2p/2n2PP1/2BQn2P/1pP1p3/1q1BK3/3R3R b - - 0 1

Analysis by Stockfish 260916 64 POPCNT:
...
1...exd2 2.Rh3
-/+ (-0.96 --) Depth: 28/61 00:04:18 4869MN
1...Qc2
-+ (-1.61 ++) Depth: 28/69 00:05:52 6708MN
1...Qc2 2.Kxe3 Raf8 3.Rdf1 Kd8 4.g6 Kc7 5.g7 Nxd2 6.Rf2 Nxc4+ 7.Qxc4 Qxf2+ 8.Kxf2 Rxf5+ 9.Ke2 Rg8 10.Rg1 b2 11.Qa2 Be7 12.Qb1 Re5+ 13.Kf3 Nxe6 14.Qxb2 Rxg7 15.Rxg7 Nxg7 16.Qa2 Rf5+ 17.Kg2 a5 18.Qc4+ Bc5 19.Qb5 Be3 20.Qa6 Nh5 21.Kh1 Ng3+ 22.Kg2 Ne4 23.Qc4+ Nc5
-+ (-1.71) Depth: 28/69 00:06:32 7485MN

And a third one:

r6r/4k3/p2bP2p/2n2PP1/2BQn2P/1pP1p3/1q1BK3/3R3R b - - 0 1

Analysis by Stockfish 260916 64 POPCNT:
...
1...exd2 2.Rh3
-/+ (-0.72 --) Depth: 29/62 00:04:06 4609MN
1...Qc2 2.Kxe3 Raf8 3.f6+ Nxf6 4.gxf6+ Rxf6 5.Rhg1 Qf5 6.Rdf1 Rxe6+ 7.Bxe6 Qxe6+ 8.Kf3 Rf8+ 9.Kg2 Qe2+ 10.Rf2 Rxf2+ 11.Qxf2 Qg4+ 12.Kf1 Qh3+ 13.Ke2 Qd3+ 14.Ke1 Kd7 15.Qe3 Qh7 16.Bc1 Qb1 17.Rg7+ Kd8 18.Rg2 b2 19.Rxb2 Nd3+ 20.Kf1 Nxb2 21.Qb6+ Kd7 22.Qxb2 Qd3+ 23.Qe2 Qxc3 24.Be3 Kc7 25.h5 a5 26.Qd2 Qc4+ 27.Qe2 Qb3 28.Bxh6 a4 29.Bd2 Qh3+ 30.Qg2 Qxh5 31.Qg7+ Kb8
-/+ (-0.82) Depth: 29/69 00:05:52 6732MN
Peter.
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peter
Posts: 3186
Joined: Sat Feb 16, 2008 7:38 am
Full name: Peter Martan

Re: "Poor Fish": very hard test suite

Post by peter »

And then I tried another engine for a single time more too:

r6r/4k3/p2bP2p/2n2PP1/2BQn2P/1pP1p3/1q1BK3/3R3R b - - 0 1

Analysis by Fritz 15:
...
1...exd2 2.Rh3 Rhf8 3.f6+[] Nxf6 4.gxf6+ Rxf6 5.Rxd2[] Rf2+ 6.Kxf2[] Qxd2+ 7.Qxd2 Ne4+[] 8.Ke3 Nxd2 9.Kxd2 Bf4+ 10.Ke2 b2 11.Ba2 Rb8 12.Rf3 Be5 13.Rf7+ Ke8 14.Bb1 Bxc3 15.Bc2 Rb4 16.Kd3 Be5
-/+ (-1.07) Depth: 19 00:01:02 704MN
1...Qc2 2.Qg7+ Kd8[] 3.Qxh8+ Kc7 4.Qxa8 Nxd2
-/+ (-1.19 ++) Depth: 20 00:04:37 3293MN
...
1...Qc2 2.Qg7+ Kd8[] 3.Qxh8+ Kc7[] 4.Qxa8 Nxd2
-+ (-1.74 ++) Depth: 20 00:06:24 4648MN
...
1...Qc2 2.Kxe3 Raf8[] 3.Rdf1 Kd8 4.g6 Kc7[] 5.g7 Nxd2 6.gxh8Q Nxf1+ 7.Rxf1 Rxh8 8.Rd1 Rd8 9.e7 Bxe7 10.Qe5+[] Kb6 11.Rxd8[] Bxd8[] 12.Qd6+[] Ka7 13.Qxd8[] Qe4+ 14.Kd2 b2 15.Ba2[] b1Q 16.Bxb1[] Nb3+
-+ (-2.53) Depth: 20 00:13:37 9573MN

Notice that F15 like old R4 is able to use 4G hash only still
Peter.
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Dann Corbit
Posts: 12541
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Re: "Poor Fish": very hard test suite

Post by Dann Corbit »

BBauer wrote:Thank you all for clarifying.
So 1. Nb3 is the only drawing move and the test position is correct.
Computer analysis may still not be enough to solve this very difficult position.
[D]1b6/2p5/1kB5/1PN5/8/3K4/8/q7 w - - 0 1

Kind regards
Bernhard
After doing a reversed analysis from Vincent Lejeune's pgn output, Komodo clearly sees the mate back to the original position and avoids the checking move.

Code: Select all

8/8/8/1p6/8/K1k5/8/3q4 b - -   acd 99; acs 0 ; acn 2199; ce 32766 ; bm Qa1+; pv Qa1+;
8/8/8/1p6/3k4/8/1K6/3q4 w - -   acd 99; acs 0 ; acn 6193; ce -32763 ; bm Ka3; pv Ka3 Qc2 Kb4 Qa4+;
8/8/8/1p6/3k4/5q2/K7/8 w - -   acd 99; acs 0 ; acn 137943; ce -32761 ; bm Ka1; pv Ka1 Kc3 Kb1 Qa8 Kc1 Qa1+;
8/8/8/1p6/4k3/5q2/1K6/8 w - -   acd 99; acs 0 ; acn 1440207; ce -32759 ; bm Kc2; pv Kc2 Kd4 Kd2 Qg2+ Kd1 Kd3 Kc1 Qc2+;
8/8/1p6/8/4k3/5q2/1K6/8 b - -   acd 99; acs 2 ; acn 8261756; ce 32758 ; bm b5; pv b5 Ka2 Kd4 Kb2 Qd1 Ka3 Qc2 Kb4 Qa4+;
8/8/1p6/8/4k3/5q2/2K5/8 w - -   acd 99; acs 0 ; acn 130228; ce -32757 ; bm Kb2; pv Kb2 b5 Ka2 Kd4 Kb2 Qd1 Ka3 Qc2 Kb4 Qa4+;
8/8/1p6/8/4k3/4qB2/2K5/8 b - -   acd 99; acs 7 ; acn 31073438; ce 32756 ; bm Qxf3; pv Qxf3 Kb2 b5 Ka2 Kd4 Kb2 Qd1 Ka3 Qc2 Kb4 Qa4+;
8/8/1p6/8/4k3/4q3/2K5/3B4 w - -   acd 99; acs 9 ; acn 37637813; ce -32755 ; bm Kb1; pv Kb1 Kd4 Kb2 Qc3+ Kb1 Qd2 Ba4 Kc3 Bc2 Qxc2+ Ka1 Qb2+;
8/8/1p6/8/5k2/4q3/2K5/3B4 b - -   acd 99; acs 44 ; acn 187053807; ce 32754 ; bm Ke4; pv Ke4 Kb2 Kd4 Bh5 Qc3+ Ka2 Qc2+ Ka3 Kc3 Bd1 Qb2+ Ka4 Qb4+;
8/8/1p6/8/5k2/4q3/3K4/3B4 w - -   acd 99; acs 19 ; acn 78434665; ce -32753 ; bm Kc2; pv Kc2 Ke4 Kb2 Kd4 Bc2 Qc3+ Ka2 Qb4 Bb3 Kc3 Kb1 Qxb3+ Kc1 Qc2+;
8/8/1p6/8/5k2/q7/3K4/3B4 b - -   acd 61; acs 78 ; acn 311902031; ce 32752 ; bm Qe3+; pv Qe3+ Kc2 Ke4 Kb2 Kd4 Bc2 Qc3+ Ka2 Qb4 Bb3 Kc3 Kb1 Qxb3+ Kc1 Qc2+;
8/8/1p6/8/5k2/q2K4/8/3B4 w - -   acd 48; acs 78 ; acn 297166507; ce -32751 ; bm Kc4; pv Kc4 Qc1+ Kb5 Qxd1 Kc6 Ke4 Kc7 Kd5 Kd7 Qa1 Ke7 Qg7+ Ke8 Ke6 Kd8 Qd7+;
8/8/1p6/8/5k2/3K4/1q6/3B4 b - -   acd 47; acs 73 ; acn 281114381; ce 32750 ; bm Qa3+; pv Qa3+ Kd2 Qe3+ Kc2 Ke4 Kb2 Kd4 Bc2 Qc3+ Ka2 Qb4 Bb3 Kc3 Kb1 Qxb3+ Kc1 Qc2+;
8/8/1p6/8/5k2/3K4/1qB5/8 w - -   acd 51; acs 77 ; acn 296857532; ce -32749 ; bm Kd2; pv Kd2 b5 Kd3 b4 Kc4 Qxc2+ Kxb4 Ke5 Kb5 Kd5 Kb6 Kd6 Ka5 Qb3 Ka6 Kc6 Ka5 Qa3+;
8/8/1p6/8/8/3K2k1/1qB5/8 b - -   acd 41; acs 71 ; acn 259974918; ce 32748 ; bm Kf4; pv Kf4 Bd1 Qa3+ Kd2 Qe3+ Kc2 Ke4 Kb2 Kd4 Bb3 Qd2+ Bc2 Kc4 Ka2 Kc3 Ka3 Kxc2 Ka4 Qa5+;
8/8/1p6/8/8/3K2k1/1q6/3B4 w - -   acd 46; acs 74 ; acn 276530405; ce -32747 ; bm Bc2; pv Bc2 Kf4 Bd1 Qa3+ Kd2 Qe3+ Kc2 Ke4 Kb2 Kd4 Bb3 Qd2+ Ka3 Kc3 Ka4 Qe2 Ka3 Qb2+ Ka4 Qxb3+;
8/2p5/8/1P6/8/3K2k1/1q6/3B4 w - -   acd 30; acs 56 ; acn 167254556; ce -32745 ; bm Bc2; pv Bc2 Kf4 Bd1 Qxb5+ Kd2 Qd7+ Kc2 Ke3 Kc3 Qxd1 Kc4 Qh5 Kb3 Qb5+ Kc3 c5 Kc2 Qb4 Kc1 Kd3 Kd1 Qd2+;
8/2p5/1P6/8/8/3K2k1/1q6/3B4 b - -   acd 31; acs 55 ; acn 169327194; ce 32746 ; bm cxb6; pv cxb6 Be2 Kf4 Bd1 Qa3+ Kd2 Qe3+ Kc2 Ke4 Kb2 Kd4 Bb3 Qd2+ Ka3 Kc3 Ka4 Qe2 Ka3 Qb2+ Ka4 Qxb3+;
8/2p5/8/1P6/8/3K2k1/5q2/3B4 b - -   acd 31; acs 67 ; acn 203125533; ce 32744 ; bm Qb2; pv Qb2 Kc4 Qc1+ Kd5 Qxd1+ Kc4 Qd6 Kb3 Qc5 b6 cxb6 Kb2 Qb4+ Kc2 Kf4 Kc1 Ke3 Kc2 Ke2 Kc1 Kd3 Kd1 Qd2+;
8/2p5/8/1P6/8/6k1/4Kq2/3B4 w - -   acd 33; acs 72 ; acn 221483209; ce -32743 ; bm Kd3; pv Kd3 Qb2 Be2 Kf4 b6 Qxb6 Bf1 Qb5+ Kd4 Qxf1 Kc5 Qa6 Kd5 Ke3 Ke5 Qd6+ Kf5 Kf3 Kg5 Qe6 Kh5 Kf4 Kh4 Qg4+;
8/2p5/5q2/1P6/8/6k1/4KN2/3B4 b - -   acd 75; acs 74 ; acn 108069743; ce 25000 ; bm Qxf2+; pv Qxf2+;
8/2p5/5q2/1P6/8/6k1/5N2/3B1K2 w - -   acd 71; acs 72 ; acn 193844586; ce -25000 ; bm Bf3; pv Bf3 Qxf3;
8/2p5/6q1/1P6/8/6k1/5N2/3B1K2 b - -   acd 65; acs 69 ; acn 146708533; ce 25000 ; bm Qf5; pv Qf5 Bf3 Qxf3;
8/2p5/6q1/1P6/6N1/6k1/8/3B1K2 w - -   acd 57; acs 73 ; acn 145679777; ce -25000 ; bm Ke1; pv Ke1 Qb1 Ne3 Qxb5;
8/2p5/6q1/1P6/5kN1/8/8/3B1K2 b - -   acd 66; acs 77 ; acn 207290267; ce 25000 ; bm Qb1; pv Qb1 Nf2 Qxb5+;
8/2p5/6q1/1P6/5kN1/5B2/8/5K2 w - -   acd 63; acs 75 ; acn 183634290; ce -25000 ; bm Be2; pv Be2 Qb1+ Kf2 c6 Kg2 cxb5;
8/2p5/6q1/1P6/6N1/4kB2/8/5K2 b - -   acd 59; acs 71 ; acn 180842581; ce 25000 ; bm Kf4; pv Kf4 Be2 c6 b6 Qb1+ Bd1 Qxd1+;
8/2p5/6q1/1P6/8/4kB2/5N2/5K2 w - -   acd 57; acs 78 ; acn 251244977; ce -25000 ; bm Ng4+; pv Ng4+ Kf4 Be2 c6 b6 Qb1+ Bd1 Qxd1+;
8/2p5/6q1/1P6/8/5B2/3k1N2/5K2 b - -   acd 68; acs 76 ; acn 189735552; ce 25000 ; bm Qb1+; pv Qb1+ Nd1 Qxb5+;
8/2p5/2B3q1/1P6/8/8/3k1N2/5K2 w - -   acd 60; acs 74 ; acn 198390717; ce -25000 ; bm Be4; pv Be4 Qf6 Kg2 Qg5+ Kh3 Qxb5;
8/2p5/2B1q3/1P6/8/8/3k1N2/5K2 b - -   acd 59; acs 71 ; acn 201616418; ce 25000 ; bm Qg6; pv Qg6 Ne4+ Ke3 Nc3 Qd3+ Ne2 Qxe2+;
8/2p5/2B1q3/1P6/8/8/3k4/3N1K2 w - -   acd 56; acs 67 ; acn 191435388; ce -25000 ; bm Nf2; pv Nf2 Qg6 Ne4+ Ke3 Nc3 Qd3+ Ne2 Qxe2+;
8/2p5/2B1q3/1P6/8/4k3/8/3N1K2 b - -   acd 56; acs 59 ; acn 173632602; ce 25000 ; bm Kd2; pv Kd2 Nf2 Qg6 Ne4+ Ke3 Nc3 Qd3+ Ne2 Qxe2+;
8/2p5/2B1q3/1P6/8/4k3/5N2/5K2 w - -   acd 54; acs 66 ; acn 193212187; ce -25000 ; bm Nd1+; pv Nd1+ Kd2 Nf2 Qg6 Ne4+ Ke3 Nc3 Qd3+ Ne2 Qxe2+;
8/2p5/2B1q3/1P6/8/3k4/5N2/5K2 b - -   acd 54; acs 63 ; acn 184884628; ce 25000 ; bm Ke3; pv Ke3 Nd1+ Kd2 Nf2 Qg6 Ne4+ Ke3 Nc3 Qd3+ Ne2 Qxe2+;
8/2p5/2B1q3/1P6/8/3k4/8/3N1K2 w - -   acd 56; acs 63 ; acn 182349954; ce -25000 ; bm Nf2+; pv Nf2+ Ke3 Ke1 Qe7 Nd1+ Kd3+ Kf2 Qe2+ Kg3 Qxd1;
8/2p5/2B1q3/1P6/3k4/8/8/3N1K2 b - -   acd 53; acs 67 ; acn 190245041; ce 25000 ; bm Kd3; pv Kd3 Nf2+ Ke3 Kg1 Qg6+ Bg2 Qf5 Nd1+ Kd2 Bc6 Kxd1;
8/2p5/2B1q3/1P6/3k4/8/5N2/5K2 w - -   acd 50; acs 61 ; acn 164761824; ce -25000 ; bm Kg2; pv Kg2 Ke3 Nh3 Qd6 Ng1 Qd2+ Kh1 Kf2 Kh2 Qd6+ Kh1 Qg3 Bd5 Qxg1+;
8/2p5/2B5/1P6/3k4/4q3/5N2/5K2 b - -   acd 54; acs 70 ; acn 196614866; ce 25000 ; bm Qe6; pv Qe6 Kg2 Ke3 Nh3 Qe5 Kh1 Qg3 Bg2 Qe1+ Kh2 Qe2 Ng5 Qxb5;
8/2p5/2B5/1P6/3k4/4q3/4KN2/8 w - -   acd 52; acs 62 ; acn 177136215; ce -25000 ; bm Kf1; pv Kf1 Qe6 Kg2 Ke3 Nh3 Qe5 Ng1 Qb2+ Kh1 Kf2 Bd7 Qc1 Kh2 Qxg1+;
8/2p5/2B5/1P6/3k1q2/8/4KN2/8 b - -   acd 54; acs 72 ; acn 197233909; ce 25000 ; bm Qf5; pv Qf5 Nd1 Qc2+ Ke1 Qa2 Nf2 Qe6+ Kd1 Qe3 Ng4 Qg1+ Kc2 Qxg4;
8/2p5/2B5/1P6/3kNq2/8/4K3/8 w - -   acd 48; acs 73 ; acn 186328283; ce -25000 ; bm Nf2; pv Nf2 Qe3+ Kf1 Qd2 Nh3 Ke3 Kg1 Qa2 Bg2 Qb1+ Bf1 c6 Kg2 cxb5;
8/2p5/2B5/1P3q2/3kN3/8/4K3/8 b - -   acd 63; acs 78 ; acn 192285007; ce 25000 ; bm Qxe4+; pv Qxe4+;
8/2p5/2B5/1P3q2/3kN3/5K2/8/8 w - -   acd 61; acs 72 ; acn 199917527; ce -25000 ; bm Kg3; pv Kg3 Qxe4;
8/2p5/2B5/1P2q3/3kN3/5K2/8/8 b - -   acd 59; acs 70 ; acn 194213633; ce 25000 ; bm Qf5+; pv Qf5+ Kg3 Qxe4;
8/2p5/2B5/1P2q3/3kN3/8/4K3/8 w - -   acd 53; acs 60 ; acn 163484113; ce -25000 ; bm Kd2; pv Kd2 Qe6 Kc1 Qb3 Nf6 Kd3 Be4+ Ke3 Bc6 Qc3+ Kb1 Qxf6;
8/2p5/2B5/1P2q3/4N3/2k5/4K3/8 b - -   acd 53; acs 69 ; acn 193152013; ce 25000 ; bm Kd4; pv Kd4 Kd1 Qe6 Kc1 Qb3 Nf6 Kd3 Be4+ Ke3 Bc6 Qc3+ Kb1 Qxf6;
8/2p5/2B5/1P2q3/8/2k5/3NK3/8 w - -   acd 51; acs 65 ; acn 180070214; ce -25000 ; bm Ne4+; pv Ne4+ Kd4 Kd1 Qe6 Kc1 Qb3 Nd2 Qc3+ Kd1 Ke3 Nf3 Qb2 Be4 Kxe4;
8/2p5/2B5/1Pq5/8/2k5/3NK3/8 b - -   acd 48; acs 57 ; acn 155336368; ce 25000 ; bm Qe5+; pv Qe5+ Ne4+ Kd4 Kd2 Qe6 Kd1 Qg8 Nd2 Kd3 Be4+ Ke3 Bb1 Qd8 Kc2 Qxd2+;
8/2p5/2B5/1Pq5/8/2k2N2/4K3/8 w - -   acd 50; acs 70 ; acn 189941811; ce -25000 ; bm Ne1; pv Ne1 Qe5+ Kf2 Qf4+ Ke2 Qd2+ Kf1 Qb2 Ng2 Kd2 Kf2 Qa3 Nh4 Qe3+ Kg2 Qf4 Kh3 Ke2 Bd7 Qe3+ Kg2 Qd4 Kg3 Qxd7;
8/2p5/2B5/1P3q2/8/2k2N2/4K3/8 b - -   acd 52; acs 63 ; acn 168961748; ce 25000 ; bm Qf4; pv Qf4 Ne1 Qd2+ Kf1 Qh2 Ng2 Kd2 Kf2 Qh3 Kg1 Qf5 Kh2 Ke2 Kg1 Qe5 Bd5 Qd4+ Kh2 c6 Be6 cxb5;
8/2p5/2B5/1P3q2/8/2k1KN2/8/8 w - -   acd 51; acs 64 ; acn 183535576; ce -25000 ; bm Ke2; pv Ke2 Qf4 Ne1 Qd2+ Kf1 Qh2 Ng2 Kd2 Kf2 Qh3 Kg1 Qf5 Kh2 Qg4 Kg1 Ke2 Bb7 Qd4+ Kh1 c6 Nf4+ Qxf4;
8/2p5/2B2q2/1P6/8/2k1KN2/8/8 b - -   acd 50; acs 47 ; acn 133970589; ce 25000 ; bm Qf5; pv Qf5 Ke2 Qf4 Ne1 Qd2+ Kf1 Qh2 Ng2 Kd2 Kf2 Qh3 Kg1 Qf5 Nh4 Qf4 Ng2 Qf6 Kh2 Ke2 Bb7 Qg5 Ne3 Qxe3;
8/2p5/2B2q2/1P6/8/2k2N2/4K3/8 w - -   acd 51; acs 76 ; acn 189297924; ce -25000 ; bm Ne1; pv Ne1 Qe5+ Kf2 Qd4+ Kf3 Qd1+ Kf2 Qd2+ Kf1 Qh2 Nf3 Qb2 Ne5 Kd4 Ng4 Qc2 Bd7 Qh7 Be8 Qh3+ Kg1 Qxg4+;
8/2p5/2B3q1/1P6/8/2k2N2/4K3/8 b - -   acd 51; acs 65 ; acn 175538727; ce 25000 ; bm Qc2+; pv Qc2+ Ke3 Qf5 Ke2 Qf4 Ne1 Qd2+ Kf1 Qh2 Nf3 Qb2 Kg1 Kd3 Nh2 Ke2 Kg2 Ke3+ Kh3 Kf4 Ng4 Qc3+ Kg2 Kxg4;
8/2p5/2B3q1/1P6/8/2k2N2/5K2/8 w - -   acd 50; acs 59 ; acn 155862052; ce -25000 ; bm Nh2; pv Nh2 Kd3 Kf3 Qf6+ Kg2 Qh4 Nf1 Qg4+ Kf2 Qe2+ Kg1 Qc2 Ng3 Ke3 Nf1+ Kf4 Be8 Qc5+ Kh1 c6 Bh5 Qxh5+;
8/2p5/2B5/1P5q/8/2k2N2/5K2/8 b - -   acd 50; acs 58 ; acn 147750058; ce 25000 ; bm Qg4; pv Qg4 Ke3 Qf5 Ke2 Qf4 Ne1 Qd2+ Kf1 Qh2 Nf3 Qa2 Kg1 Kd3 Nh2 Qb2 Nf1 Qe5 Kg2 Qe2+ Kg1 Qd1 Be4+ Kxe4;
8/2p5/2B5/1P5q/8/2k2N2/4K3/8 w - -   acd 51; acs 35 ; acn 88824601; ce -25000 ; bm Ke3; pv Ke3 Qg4 Kf2 Qf4 Kg2 Kd3 Nh2 Qh4 Nf1 Qg4+ Kf2 Qe2+ Kg1 Qb2 Ng3 Ke3 Nf5+ Kf4 Nh4 Kg4 Bg2 Kxh4;
8/2p5/2B5/1P6/8/2k2N1q/4K3/8 b - -   acd 48; acs 56 ; acn 146413246; ce 25000 ; bm Qe6+; pv Qe6+ Kf2 Qg6 Ke2 Qg2+ Ke3 Qg4 Kf2 Qf4 Ke2 Qf6 Ke3 Qf5 Kf2 Kd3 Bd7 Qc5+ Kf1 Ke3 Nh4 Qc4+ Kg2 Qxh4;
8/2p5/2B5/1P6/8/2k4q/3NK3/8 w - -   acd 52; acs 72 ; acn 188288162; ce -25000 ; bm Nf3; pv Nf3 Qg3 Ke3 Qg4 Kf2 Qf4 Ke2 Qf6 Ne1 Qd6 Ng2 Qd3+ Kf2 Kd2 Nh4 Qe3+ Kg2 Qf4 Ng6 Qg4+ Kh2 Qxg6;
8/2p5/2B5/1P6/1k6/7q/3NK3/8 b - -   acd 50; acs 79 ; acn 201335306; ce 25000 ; bm Kc3; pv Kc3 Nf3 Qh6 Kf2 Qf4 Ke2 Qf6 Ne1 Qf5 Ng2 Qd3+ Ke1 Qc2 Kf1 Kd2 Kf2 Qb3 Kg1 Qd1+ Kf2 Qg4 Nh4 Qxh4+;
8/2p5/2B5/1P6/1k2N3/7q/4K3/8 w - -   acd 49; acs 50 ; acn 136495885; ce -25000 ; bm Nf2; pv Nf2 Qf5 Ke3 Kc4 Ne4 Qe5 Kf3 Kd4 Ng3 Qf6+ Kg4 Ke5 Nh5 Qf5+ Kh4 Kd4 Ng3 Qf4+ Kh3 Qg5 Be8 Qe5 Nf1 Qxe8;
8/2p5/2B5/1P6/1k2N3/6q1/4K3/8 b - -   acd 50; acs 63 ; acn 158628444; ce 25000 ; bm Qh3; pv Qh3 Nf2 Qf5 Ke3 Kc4 Ne4 Qe5 Kf3 Kd4 Ng3 Qf6+ Kg4 Ke5 Nh5 Qg6+ Kh4 Qf5 Ng3 Qf4+ Kh3 Qd2 Be8 c6 b6 Qb2 b7 Qxb7;
8/2p5/2B5/1P6/1k6/6q1/3NK3/8 w - -   acd 52; acs 67 ; acn 164854368; ce -25000 ; bm Ne4; pv Ne4 Qh3 Nf2 Qc3 Ne4 Qa3 Kf2 Qd3 Ng3 Kc3 Kg2 Kd2 Nf1+ Ke2 Ng3+ Ke3 Nf1+ Kf4 Kf2 Qd1 Be8 c6 b6 Qd4+ Ke1 Qxb6;
8/2p5/2B5/1P6/1k6/2q5/3NK3/8 b - -   acd 49; acs 16 ; acn 43129653; ce 25000 ; bm Qh3; pv Qh3 Ne4 Kc4 Nd2+ Kd4 Nf3+ Kc3 Ke3 Qg4 Kf2 Qf4 Kg2 Kd3 Nh2 Qg5+ Kf3 Qe3+ Kg2 Qe6 Bf3 Qe5 Bg4 Qxb5;
8/2p5/2B5/1P6/1k6/2qK4/3N4/8 w - -   acd 53; acs 77 ; acn 194570381; ce -25000 ; bm Ke2; pv Ke2 Qh3 Ne4 Kc4 Kf2 Kd3 Ng3 Qg4 Nf1 Qf4+ Kg2 Qf7 Kg1 Qa2 Ng3 Qb2 Bg2 Ke3 Nf5+ Kf4 Kh1 Kxf5;
8/2p5/2B5/1P2q3/1k6/3K4/3N4/8 b - -   acd 50; acs 48 ; acn 118257787; ce 25000 ; bm Qc3+; pv Qc3+ Ke2 Qh3 Nf3 Kc3 Kf2 Qg4 Nh2 Qh4+ Kg1 Qg5+ Kf2 Kd3 Nf1 Qf6+ Kg1 Qf5 Ng3 Qh3 Be4+ Kc4 Bb1 Qxg3+;
8/2p5/2B5/1P2q3/1k6/4K3/3N4/8 w - -   acd 50; acs 70 ; acn 174047440; ce -25000 ; bm Ne4; pv Ne4 Kc4 Kf3 Kd4 Ng3 Qf6+ Kg4 Ke5 Nh5 Qe7 Ng3 Qb4+ Kh3 Kf4 Nh5+ Kg5 Ng3 Qg4+ Kh2 Kf4 Nf1 Qe2+ Bg2 Qxb5;
8/2p5/2B5/1P3q2/1k6/4K3/3N4/8 b - -   acd 53; acs 46 ; acn 126997077; ce 25000 ; bm Qc5+; pv Qc5+ Ke2 Qc2 Ke3 Qc3+ Ke2 Qh3 Nf3 Kc3 Kf2 Qg4 Nh2 Qh4+ Kg1 Kd3 Kg2 Qg5+ Kf2 Qf5+ Bf3 Kc3 Kg2 Qxb5;
8/2p5/2B5/1P3q2/1k6/4KN2/8/8 w - -   acd 51; acs 44 ; acn 120936309; ce -25000 ; bm Nd4; pv Nd4 Qe5+ Kd3 Qe7 Nf3 Kc5 Nd2 Qd6+ Ke3 Qe6+ Kd3 Kb4 Ne4 Qe5 Kd2 Kc4 Ke3 Qe6 Kf4 Kd4 Ng5 Qf6+ Kg4 Ke3 Nh3 Qe6+ Kh4 Qg6 Ng5 Kf4 Nh3+ Ke5 Ng5 Qf6 Kh5 Qf5 Kh4 Qf4+ Kh5 Qf6 Bd7 Qe7 Bc6 Qc5 Nh7 Qc4 Ng5 Qf4 Nf3+ Kf6 Ba8 Qg3 Bd5 Qg7 Be4;
8/2p5/2B5/1P6/1k6/4KN1q/8/8 b - -   acd 55; acs 77 ; acn 202459341; ce 25000 ; bm Qf5; pv Qf5 Nd4 Qe5+ Kd3 Qf4 Ne2 Qg4 Ke3 Kc4 Nf4 Qf5 Ne2 Qd3+ Kf2 Qh3 Nf4 Qa3 Ne2 Kd3 Nf4+ Kd2 Kg2 Ke3 Nd5+ Ke4 Nf6+ Kf4 Ne8 Qg3+ Kh1 Ke3 Bg2 Kf2 Nf6 Qxg2+;
8/2p5/2B5/1P6/1k6/3K1N1q/8/8 w - -   acd 55; acs 54 ; acn 154741918; ce -25000 ; bm Ke3; pv Ke3 Qf5 Nd4 Qg4 Kd3 Qg6+ Ke3 Kc3 Ne2+ Kc4 Nf4 Qf5 Ne2 Qd3+ Kf2 Qa3 Nf4 Qc3 Kg2 Qe3 Nh3 Kd4 Kh2 Qe5+ Kg2 Ke3 Kh1 Qg3 Bg2 Qe1+ Ng1 Kf2 b6 Qxg1+;
8/2p5/2B5/1P6/1k6/4KNq1/8/8 w - -   acd 55; acs 79 ; acn 184094141; ce -25000 ; bm Ke4; pv Ke4 Qg4+ Ke5 Kc5 Kf6 Kd6 Ng5 Qf4+ Kg6 Ke7 Ne4 Qe5 Ng5 Qf6+ Kh5 Qg7 Kh4 Kf6 Ne4+ Kf5 Nf2 Qg5+ Kh3 Qg1 Bd7+ Kg5 Ne4+ Kf4 Ng3 Qxg3+;
8/2p5/2B5/1P6/1k6/3K1Nq1/8/8 b - -   acd 55; acs 64 ; acn 172647973; ce 25000 ; bm Qf4; pv Qf4 Nd4 Qe5 Nc2+ Kc5 Ne3 Qe6 Kd2 Qd6+ Ke2 Qf6 Kd3 Qd4+ Ke2 Qc3 Kf2 Qd3 Ng2 Kd4 Kg1 Qg3 Kf1 Qh2 Bf3 Kc5 Be2 c6 b6 Kxb6;
8/2p5/2B5/1P6/1k5q/4KN2/8/8 b - -   acd 53; acs 70 ; acn 174059070; ce 25000 ; bm Qg3; pv Qg3 Ke4 Qg4+ Ke5 Kc5 Kf6 Kd6 Ng5 Qf4+ Kg6 Ke5 Nf3+ Ke6 Ng5+ Kd6 Nf3 Ke7 Ng5 Qf6+ Kh5 Qg7 Ne4 Ke6 Kh4 Qf8 Ng5+ Ke5 Bf3 Qb4+ Kg3 Qxb5;
8/2p5/2B5/1P2N3/1k5q/4K3/8/8 w - -   acd 49; acs 42 ; acn 111444574; ce -25000 ; bm Kf3; pv Kf3 Kc5 Ng4 Kd6 Kf4 Ke6 Kf3 Qh5 Kg3 Qc5 Kf3 Qf8+ Ke3 Kf5 Nf2 Qc5+ Ke2 Qe7+ Kf1 Ke5 Ng4+ Kd6 Kf2 Qh4+ Kf3 Qh5 Kg3 Qg5 Kf3 Qf5+ Kg3 Qd3+ Kf4 Qf1+ Ke3 Qe1+ Kf4 Qb4+ Kf5 Qd4 Nf6 Qe5+ Kg6 Ke6 Ne4 Qf5+ Kh6 Qf8+ Kh7 Qf7+ Kh6 Ke5 Ng5 Qf6+ Kh5 Qh8+ Kg6 Qg8+ Kh5;
8/2p5/2B5/kP2N3/7q/4K3/8/8 b - -   acd 51; acs 54 ; acn 137239569; ce 25000 ; bm Kb4; pv Kb4 Nd3+ Kc3 Nf4 Qe7+ Kf3 Kd4 Ne2+ Ke5 Kf2 Qf7+ Ke3 Qb3+ Kf2 Qa3 Kg2 Qe3 Kf1 Kd6 Ke1 Kc5 Kd1 Kc4 Nc1 Qf2 Bd7 Qd4+ Ke1 Qxd7;
8/2pN4/2B5/kP6/7q/4K3/8/8 w - -   acd 52; acs 78 ; acn 219542425; ce -25000 ; bm Nc5; pv Nc5 Kb4 Ne4 Qg4 Kd4 Qe6 Kd3 Qe5 Ke2 Kc4 Ke3 Qe7 Kf4 Kd4 Ng5 Qf6+ Kg4 Ke3 Nh7 Qe7 Ng5 Qe5 Nh3 Qe6+ Kh4 Qf5 Be8 Qe4+ Kg5 Qxe8;
8/2pN4/2B5/kP6/1q6/4K3/8/8 b - -   acd 53; acs 75 ; acn 209810578; ce 25000 ; bm Qh4; pv Qh4 Ne5 Kb4 Nf3 Qg3 Ke4 Qg4+ Ke5 Kc5 Kf6 Kd6 Ng5 Qf4+ Kg6 Ke7 Ne4 Qf7+ Kh6 Qf5 Ng5 Kf6 Ne4+ Ke6 Ng5+ Ke5 Nh7 Kd6 Nf8 Qxf8+;
8/2pN4/2B5/kP6/1q6/3K4/8/8 w - -   acd 51; acs 72 ; acn 204759115; ce -25000 ; bm Nb8; pv Nb8 Qg4 Na6 Qd1+ Ke4 Kb6 Ke5 Qd6+ Ke4 Qd2 Kf5 Qe2 Kf4 Ka7 Kf5 Qe7 Kf4 Kb6 Kf3 Qe5 Kf2 Qf4+ Ke2 Qc4+ Kd2 Ka5 Ke3 Ka4 Kf2 Kb3 Kf3 Kc3 Nxc7;
8/2pN4/2B5/kP6/q7/3K4/8/8 b - -   acd 53; acs 67 ; acn 201073748; ce 25000 ; bm Qb4; pv Qb4 Nb8 Qg4 Na6 Qd1+ Kc3 Kb6 Kc4 Qd2 Nb8 Qf4+ Kd3 Qg3+ Kd4 Qg4+ Kc3 Qh3+ Kc4 Qh4+ Kd3 Kc5 Na6+ Kd6 Nb8 Qh7+ Ke3 Qh8 Nd7 Qh3+ Ke4 Qc3 Nb8 Qc4+ Ke3 Ke5 Nd7+ Kf5 Kd2 Kf4 Nb8 Qa2+ Kc3 Qa3+ Kc4 Ke5 Nd7+ Kd6 Nb8 Qc1+ Kd3 Qd1+ Kc3 Qe1+ Kd3 Qb4 Nd7 Qb3+ Kd4 Qa4+ Kc3 Qa3+ Kc4 Qe3;
1N6/2p5/2B5/kP6/q7/3K4/8/8 w - -   acd 53; acs 75 ; acn 186085671; ce -25000 ; bm Nd7; pv Nd7 Qb4 Nb8 Qg4 Na6 Kb6 Kc3 Qd1 Nb8 Kc5 Na6+ Kd6 Nb8 Qe2 Nd7 Qe3+ Kc4 Qa3 Nb8 Qc1+ Kd3 Qb1+ Kc3 Qa1+ Kd3 Qf1+ Kc3 Qh3+ Kc4 Qe6+ Kc3 Qe1+ Kc4 Qh4+ Kd3 Qg3+ Kd4 Qg7+ Ke4 Qh7+ Ke3 Qh3+ Ke4 Qg4+ Kd3 Qf5+ Kc4 Qc2+ Kd4 Qb2+ Kc4 Qe2+ Kd4 Qf2+ Kd3 Qf4 Nd7 Qf1+ Kc3 Qe1+ Kc4 Qh4+ Kc3;
1b6/2pN4/2B5/kP6/8/3K4/8/q7 w - -   acd 46; acs 77 ; acn 58815759; ce -25000 ; bm Nxb8; pv Nxb8 Qa4 Kc3 Qh4 Na6 Qg4 Kd3 Kb6 Nb8 Kc5 Na6+ Kd6 Nb8 Qg3+ Kd4 Qh4+ Kd3 Qf6 Ke4 Qh8 Nd7 Qc3 Nb8 Qc4+ Ke3 Ke5 Nd7+ Kf5 Kd2 Kf4 Nf8 Qb4+ Kc1 Qxf8;
1N6/2p5/2B5/kP6/8/3K4/8/q7 b - -   acd 55; acs 64 ; acn 190592946; ce 25000 ; bm Qh8; pv Qh8 Nd7 Qh4 Nc5 Qg4 Na6 Kb6 Nb8 Qh3+ Kc4 Qh4+ Kd3 Kc5 Na6+ Kd6 Nb8 Qh7+ Ke3 Qe7+ Kd4 Qf6+ Kd3 Qf1+ Ke3 Qe1+ Kd3 Qg3+ Kd4 Qg4+ Kd3 Qh3+ Ke4 Qe6+ Kd3 Qb3+ Ke4 Qb4+ Ke3 Ke5 Nd7+ Kf5 Kd3 Kf4 Nb8 Qf8 Nd7 Qd6+ Kc3 Qa3+ Kc4 Qa4+ Kc5 Qc2+ Kb4 Qd2+ Ka4 Qa2+ Kb4 Qb1+ Kc5 Qe1 Kc4 Qe2+;
1b6/2pN4/1kB5/1P6/8/3K4/8/q7 b - -   acd 50; acs 60 ; acn 96647994; ce 25000 ; bm Ka5; pv Ka5 Nxb8 Qh8 Nd7 Qh4 Nc5 Qg4 Na6 Qg3+ Kc4 Kb6 Kd4 Qh4+ Ke5 Qd8 Ke4 Qg8 Kd4 Qg5 Kc4 Qe3 Nb8 Qe6+ Kc3 Kc5 Nd7+ Kd6 Kd3 Qg8 Kd4 Qg1+ Ke4 Qe1+ Kd4 Qh4+ Ke3 Qh8 Ke4 Qh3 Kd4 Qf5 Ke3 Qf1 Nb8 Qg1+ Kd3 Qg6+ Ke3 Qe6+ Kd3 Qf5+ Kd4 Qc5+ Kd3 Qa3+ Ke4 Qb4+ Ke3 Qc3+ Ke4;
1b6/2p5/1kB5/1PN5/8/3K4/8/q7 w - -   acd 53+; acs 72 ; acn 150065046; ce -409 ; bm Nb3; pv Nb3 Qb2 Kc4;
But Stockfish still wants to make the move Nd7+:

Code: Select all

8/8/8/1p6/8/K1k5/8/3q4 b - -   acd 127/2; acs 1 ; acn 7199; ce 32766 ; bm Qa1+; pv Qa1+;
8/8/8/1p6/3k4/8/K7/3q4 b - -   acd 127/4; acs 1 ; acn 12643; ce 32764 ; bm Kc3; pv Kc3 Ka3 Qa1+;
8/8/8/1p6/3k4/8/1K6/3q4 w - -   acd 127/5; acs 1 ; acn 76322; ce -32763 ; bm Ka3; pv Ka3 Qc2 Kb4 Qa4+;
8/8/8/1p6/3k4/5q2/K7/8 w - -   acd 127/7; acs 1 ; acn 485762; ce -32761 ; bm Kb2; pv Kb2 Qd1 Ka3 Qc2 Kb4 Qa4+;
8/8/8/1p6/4k3/5q2/1K6/8 w - -   acd 127/11; acs 1 ; acn 3435758; ce -32759 ; bm Ka2; pv Ka2 Kd4 Kb2 Qd1 Ka3 Qc2 Kb4 Qa4+;
8/8/1p6/8/4k3/5q2/1K6/8 b - -   acd 110/10; acs 5 ; acn 21240364; ce 32758 ; bm Kd3; pv Kd3 Kb3 Qe2 Kb4 Kc2 Ka4 Qc4+ Ka3 Qb3+;
8/8/1p6/8/4k3/5q2/2K5/8 w - -   acd 114/11; acs 65 ; acn 408839600; ce -32757 ; bm Kb2; pv Kb2 Kd3 Kb3 Qd1+ Ka3 Qb1 Ka4 Kc2 Ka3 Qb3+;
8/8/1p6/8/4k3/4qB2/2K5/8 b - -   acd 103/12; acs 9 ; acn 37655589; ce 32756 ; bm Qxf3; pv Qxf3 Kb2 Kd3 Kb3 Qe4 Kb2 Qa4 Kb1 Kc3 Kc1 Qc2+;
8/8/1p6/8/4k3/4q3/2K5/3B4 w - -   acd 105/21; acs 91 ; acn 496474505; ce -32755 ; bm Bg4; pv Bg4 Kd4 Bf5 Qc3+ Kb1 Qd2 Ka1 Kc3 Bc2 Kxc2 Ka2 Qa5+;
8/8/1p6/8/5k2/4q3/2K5/3B4 b - -   acd 102/32; acs 102 ; acn 543040008; ce 32754 ; bm Ke4; pv Ke4 Kb2 Kd4 Bc2 Qc3+ Kc1 Kc4 Kb1 Qa3 Bd1 Kc3 Ba4 Qb2+;
8/8/1p6/8/5k2/4q3/3K4/3B4 w - -   acd 109/25; acs 153 ; acn 793100006; ce -32753 ; bm Kc2; pv Kc2 Ke5 Kb1 Kd4 Kc2 Qd3+ Kb2 Qxd1 Ka3 Kc3 Ka2 Qc2+ Ka3 Qb3+;
8/8/1p6/8/5k2/q7/3K4/3B4 b - -   acd 100/29; acs 136 ; acn 711184612; ce 32752 ; bm Ke4; pv Ke4 Bc2+ Kd4 Ke2 Qe3+ Kf1 Qf3+ Kg1 Qg3+ Kh1 Ke3 Bb3 Kf2 Bc2 Qg1+;
8/8/1p6/8/5k2/q2K4/8/3B4 w - -   acd 86/33; acs 146 ; acn 700996057; ce -32751 ; bm Kd2; pv Kd2 Ke4 Bc2+ Kd4 Ke2 Qg3 Bg6 Qg2+ Kd1 Qxg6 Kc1 Kc3 Kd1 Qe4 Kc1 Qc2+;
8/8/1p6/8/5k2/3K4/1q6/3B4 b - -   acd 91/30; acs 158 ; acn 667433201; ce 32750 ; bm Qa3+; pv Qa3+ Kd2 Ke4 Bc2+ Kd4 Ke2 Qe3+ Kf1 Qf3+ Kg1 Qg3+ Kh1 Ke3 Bh7 Kf2 Bg6 Qg1+;
8/8/1p6/8/5k2/3K4/1qB5/8 w - -   acd 84/31; acs 156 ; acn 648637613; ce -32749 ; bm Bd1; pv Bd1 Qa3+ Kd2 Ke4 Bc2+ Kd4 Ke2 Qe3+ Kf1 Qf3+ Kg1 Qg3+ Kh1 Ke3 Bd3 Kf2 Bf1 Qg1+;
8/8/1p6/8/8/3K2k1/1qB5/8 b - -   acd 77/34; acs 145 ; acn 604067765; ce 32748 ; bm Kf4; pv Kf4 Bd1 Qa3+ Kc4 Qc1+ Kb3 Qxd1+ Kc4 Ke3 Kb5 Qd7+ Kb4 Qd3 Ka4 Kd2 Kb4 Kc2 Ka4 Qb3+;
8/8/1p6/8/8/3K2k1/1q6/3B4 w - -   acd 68/37; acs 150 ; acn 671648575; ce -32747 ; bm Be2; pv Be2 Kf4 Bd1 Qa3+ Kc4 Qc1+ Kb3 Qxd1+ Kc4 Ke3 Kb5 Qd7+ Kxb6 Kd4 Ka5 Kc5 Ka6 Qf7 Ka5 Qa2+;
8/2p5/8/1P6/8/3K2k1/1q6/3B4 w - -   acd 61/45; acs 156 ; acn 665861529; ce -32745 ; bm b6; pv b6 Qxb6 Kc4 Qa6+ Kd4 Qa1+ Kd3 Qxd1+ Kc4 Kf4 Kb4 Ke4 Kc4 Qc2+ Kb4 Kd3 Ka3 Qb1 Ka4 Kc4 Ka3 Qa1+;
8/2p5/1P6/8/8/3K2k1/1q6/3B4 b - -   acd 62/49; acs 149 ; acn 656419698; ce 32744 ; bm Qxb6; pv Qxb6 Kc4 Qc6+ Kd3 Kf4 Bb3 Qd7+ Kc3 Ke3 Kb4 Kd4 Ba4 Qd5 Bb5 Qa2 Ba4 Qc4+ Ka3 Kc3 Bd1 Qb4+ Ka2 Qb2+;
8/2p5/8/1P6/8/3K2k1/5q2/3B4 b - -   acd 57/49; acs 154 ; acn 653588460; ce 32744 ; bm Qb2; pv Qb2 b6 Qxb6 Bc2 Kf4 Kc4 Ke3 Ba4 Qd6 Kc3 Qc5+ Kb3 Kd3 Kb2 Qc3+ Ka2 Qc1 Kb3 Qb1+ Ka3 Kc3 Bc2 Qa1+;
8/2p5/8/1P6/8/6k1/4Kq2/3B4 w - -   acd 53/51; acs 152 ; acn 645221154; ce -32743 ; bm Kd3; pv Kd3 Kf4 Bb3 Qg2 Kc4 Ke3 Kc5 Qg6 Bg8 Qxg8 b6 cxb6+ Kd6 Kd4 Ke7 Ke5 Kd7 Qc4 Ke8 Qc7 Kf8 Kf6 Ke8 Qe7+;
8/2p5/5q2/1P6/8/6k1/4KN2/3B4 b - -   acd 119/2; acs 74 ; acn 139001333; ce 12850 ; bm Qxf2+; pv Qxf2+;
8/2p5/5q2/1P6/8/6k1/5N2/3B1K2 w - -   acd 127/3; acs 123 ; acn 319782692; ce -12850 ; bm Ke2; pv Ke2 Qxf2+;
8/2p5/6q1/1P6/8/6k1/5N2/3B1K2 b - -   acd 127/4; acs 100 ; acn 228400527; ce 12850 ; bm Qf5; pv Qf5 Bf3 Qxf3;
8/2p5/6q1/1P6/6N1/6k1/8/3B1K2 w - -   acd 121/5; acs 157 ; acn 552147285; ce -12849 ; bm Nf2; pv Nf2 Qf5 Bf3 Qxb5+;
8/2p5/6q1/1P6/5kN1/8/8/3B1K2 b - -   acd 119/4; acs 104 ; acn 320759368; ce 12850 ; bm Qb1; pv Qb1 Ke1 Qxb5;
8/2p5/6q1/1P6/5kN1/5B2/8/5K2 w - -   acd 127/7; acs 145 ; acn 383769965; ce -12847 ; bm Be2; pv Be2 c6 b6 Qb1+ Kg2 Qxb6;
8/2p5/6q1/1P6/6N1/4kB2/8/5K2 b - -   acd 109/8; acs 91 ; acn 272945056; ce 12847 ; bm Kf4; pv Kf4 Be2 c6 b6 Qb1+ Kg2 Qxb6;
8/2p5/6q1/1P6/8/4kB2/5N2/5K2 w - -   acd 106/9; acs 101 ; acn 303885083; ce -12847 ; bm Ng4+; pv Ng4+ Kf4 Be2 c6 b6 Qb1+ Kg2 Qxb6;
8/2p5/6q1/1P6/8/5B2/3k1N2/5K2 b - -   acd 127/4; acs 10 ; acn 28592649; ce 12850 ; bm Qb1+; pv Qb1+ Kg2 Qxb5;
8/2p5/2B3q1/1P6/8/8/3k1N2/5K2 w - -   acd 115/8; acs 158 ; acn 531393472; ce -12847 ; bm Be4; pv Be4 Qf6 Bc6 Ke3 Kg2 Qxf2+;
8/2p5/2B1q3/1P6/8/8/3k1N2/5K2 b - -   acd 108/9; acs 145 ; acn 483303584; ce 12847 ; bm Qg6; pv Qg6 Be4 Qf6 Bc6 Ke3 Kg2 Qxf2+;
8/2p5/2B1q3/1P6/8/8/3k4/3N1K2 w - -   acd 105/25; acs 148 ; acn 529162111; ce -12847 ; bm Nf2; pv Nf2 Qg6 Be4 Qf6 Kg2 Qg5+ Kf3 Qxb5;
8/2p5/2B1q3/1P6/8/4k3/8/3N1K2 b - -   acd 104/20; acs 153 ; acn 522700503; ce 12847 ; bm Kd2; pv Kd2 Nf2 Qg8 Bd7 Qf7 Bc6 Ke3 Kg2 Qxf2+;
8/2p5/2B1q3/1P6/8/4k3/5N2/5K2 w - -   acd 101/23; acs 157 ; acn 550477584; ce -12847 ; bm Nd1+; pv Nd1+ Kd2 Nf2 Qg8 Bd7 Qf7 Bg4 Ke3 Ke1 Qxf2+;
8/2p5/2B1q3/1P6/8/3k4/5N2/5K2 b - -   acd 104/14; acs 157 ; acn 582740670; ce 12846 ; bm Ke3; pv Ke3 Nd1+ Kd2 Nf2 Qg6 Be4 Qf6 Bc6 Ke3 Kg2 Qxf2+;
8/2p5/2B1q3/1P6/8/3k4/8/3N1K2 w - -   acd 100/27; acs 157 ; acn 541140366; ce -12846 ; bm Nf2+; pv Nf2+ Ke3 Nd1+ Kd2 Nf2 Qg6 Bd7 Qf7 Bc6 Ke3 Ke1 Qxf2+;
8/2p5/2B1q3/1P6/3k4/8/8/3N1K2 b - -   acd 99/26; acs 151 ; acn 520123900; ce 12844 ; bm Kd3; pv Kd3 Nf2+ Ke3 Nd1+ Kd2 Nf2 Qg8 Ne4+ Ke3 Nf6 Qf8 Kg1 Qxf6;
8/2p5/2B1q3/1P6/3k4/8/5N2/5K2 w - -   acd 92/31; acs 154 ; acn 563608239; ce -12844 ; bm Nd1; pv Nd1 Kd3 Nf2+ Ke3 Nd1+ Kd2 Nf2 Qg6 Nh3 Ke3 Nf2 Qf6 Kg1 Qxf2+;
8/2p5/2B5/1P6/3k4/4q3/5N2/5K2 b - -   acd 92/21; acs 129 ; acn 471366973; ce 12844 ; bm Qd2; pv Qd2 Kg1 Ke3 Nh3 Qd6 Kg2 Qe5 Kg1 Qg3+ Bg2 c6 b6 Qb8 b7 Qxb7;
8/2p5/2B5/1P6/3k4/4q3/4KN2/8 w - -   acd 85/37; acs 153 ; acn 573851353; ce -12844 ; bm Kf1; pv Kf1 Qe6 Nd1 Kd3 Nf2+ Ke3 Nd1+ Kd2 Nf2 Qg6 Ne4+ Ke3 Nf2 Qf5 Kg2 Qxf2+;
8/2p5/2B5/1P6/3k1q2/8/4KN2/8 b - -   acd 89/26; acs 118 ; acn 438651851; ce 12844 ; bm Qe3+; pv Qe3+ Kf1 Qd2 Kg1 Ke3 Nh3 Qd6 Kg2 Qe5 Kg1 Qg3+ Bg2 Qg4 Nf2 Qe2 Nh1 Qxb5;
8/2p5/2B5/1P6/3kNq2/8/4K3/8 w - -   acd 86/31; acs 142 ; acn 509119220; ce -12843 ; bm Nf2; pv Nf2 Qe3+ Kf1 Qe6 Nd1 Kd3 Nf2+ Ke3 Nd1+ Kd2 Nf2 Qg8 Nh3 Ke3 Bd7 Qf7+ Ke1 Qxd7;
8/2p5/2B5/1P3q2/3kN3/8/4K3/8 b - -   acd 118/2; acs 158 ; acn 585035015; ce 12850 ; bm Qxe4+; pv Qxe4+;
8/2p5/2B5/1P3q2/3kN3/5K2/8/8 w - -   acd 127/3; acs 122 ; acn 395863810; ce -12850 ; bm Ke2; pv Ke2 Qxe4+;
8/2p5/2B5/1P2q3/3kN3/5K2/8/8 b - -   acd 127/4; acs 158 ; acn 585107426; ce 12850 ; bm Qf5+; pv Qf5+ Ke2 Qxe4+;
8/2p5/2B5/1P2q3/3kN3/8/4K3/8 w - -   acd 90/15; acs 142 ; acn 466986662; ce -12844 ; bm Kd1; pv Kd1 Qh2 Kc1 Qe2 Kb1 Qd1+ Kb2 Kc4 Ka2 Qb3+ Ka1 Qc2 Nd2+ Qxd2;
8/2p5/2B5/1P2q3/4N3/2k5/4K3/8 b - -   acd 97/18; acs 155 ; acn 535769815; ce 12844 ; bm Kd4; pv Kd4 Kd2 Qh2+ Kc1 Qe2 Kb1 Qd1+ Kb2 Kc4 Ka2 Qc2+ Ka1 Kb3 Nd2+ Qxd2;
8/2p5/2B5/1P2q3/8/2k5/3NK3/8 w - -   acd 94/17; acs 156 ; acn 541380857; ce -12844 ; bm Ne4+; pv Ne4+ Kd4 Kd2 Qh2+ Kc1 Qe2 Kb1 Qd1+ Kb2 Kc4 Ka2 Qb3+ Ka1 Qc2 Nc5 Kxc5;
8/2p5/2B5/1Pq5/8/2k5/3NK3/8 b - -   acd 91/20; acs 137 ; acn 454903077; ce 12844 ; bm Qe5+; pv Qe5+ Ne4+ Kd4 Kd1 Qh2 Kc1 Qe2 Kb1 Qd1+ Kb2 Kc4 Ka2 Qc2+ Ka1 Kb3 Nd2+ Qxd2;
8/2p5/2B5/1Pq5/8/2k2N2/4K3/8 w - -   acd 81/41; acs 143 ; acn 570144867; ce -12840 ; bm Ne1; pv Ne1 Qe5+ Kf2 Qf4+ Ke2 Qd2+ Kf1 Qb2 Ng2 Kd2 Kf2 Qc3 Nh4 Qe3+ Kg2 Qg5+ Kh3 Ke3 Bd7 Kf2 Nf5 Qg6 Bc8 Qh5+ Nh4 Qxb5;
8/2p5/2B5/1P3q2/8/2k2N2/4K3/8 b - -   acd 87/34; acs 151 ; acn 565669658; ce 12841 ; bm Qf4; pv Qf4 Ne1 Qd2+ Kf1 Qb2 Ng2 Kd2 Kf2 Qc3 Nh4 Qe3+ Kg2 Qg5+ Kh3 Ke3 Bd7 Kf2 Nf5 Qg6 Bc8 Qh5+ Nh4 Qxb5;
8/2p5/2B5/1P3q2/8/2k1KN2/8/8 w - -   acd 81/45; acs 153 ; acn 629365440; ce -12840 ; bm Ne1; pv Ne1 Qe5+ Kf2 Qf4+ Ke2 Qd2+ Kf1 Qb2 Ng2 Kd2 Kf2 Qa3 Nh4 Qe3+ Kg2 Qg5+ Kh3 Ke3 Bd7 Kf2 Nf5 Qg2+ Kh4 Qd5 Kh5 Qxd7;
8/2p5/2B2q2/1P6/8/2k1KN2/8/8 b - -   acd 83/38; acs 157 ; acn 636611567; ce 12840 ; bm Qf5; pv Qf5 Ne1 Qe5+ Kf2 Qf4+ Ke2 Qd2+ Kf1 Qb2 Ng2 Kd2 Kf2 Qa3 Nh4 Qe3+ Kg2 Qg5+ Kh3 Ke3 Bd7 Kf2 Nf5 Qg2+ Kh4 Qd5 Bc6 Qxf5;
8/2p5/2B2q2/1P6/8/2k2N2/4K3/8 w - -   acd 81/41; acs 157 ; acn 668605916; ce -12838 ; bm Ke3; pv Ke3 Qf5 Ne1 Qe5+ Kf2 Qf4+ Ke2 Qd2+ Kf1 Qb2 Ng2 Kd2 Kf2 Qc3 Nh4 Qe3+ Kg2 Qg5+ Kh3 Ke3 Bd7 Kf2 Nf5 Qg6 Kh4 Qh7+ Kg4 Qxd7;
8/2p5/2B3q1/1P6/8/2k2N2/4K3/8 b - -   acd 80/57; acs 147 ; acn 609218932; ce 12838 ; bm Qf6; pv Qf6 Ke3 Qf5 Ne1 Qe5+ Kf2 Qf4+ Ke2 Qd2+ Kf1 Qb2 Ng2 Kd2 Kf2 Qc3 Nh4 Qe3+ Kg2 Qg5+ Kh3 Ke3 Bd7 Kf2 Nf5 Qg6 Bc8 Qh5+ Nh4 Qxb5;
8/2p5/2B3q1/1P6/8/2k2N2/5K2/8 w - -   acd 76/50; acs 151 ; acn 627572722; ce -12838 ; bm Ke2; pv Ke2 Qc2+ Ke3 Qf5 Ne1 Qe5+ Kf2 Qf4+ Ke2 Qd2+ Kf1 Qb2 Ng2 Kd2 Kf2 Qc3 Nh4 Qe3+ Kg2 Qg5+ Kh3 Ke3 Bd7 Kf2 Nf5 Qg6 Kh4 Qh7+ Kg4 Qxd7;
8/2p5/2B5/1P5q/8/2k2N2/5K2/8 b - -   acd 83/40; acs 148 ; acn 589790990; ce 12838 ; bm Qg4; pv Qg4 Ke3 Qf5 Ne1 Qe5+ Kf2 Qf4+ Ke2 Qd2+ Kf1 Qb2 Ng2 Kd2 Kf2 Qc3 Nh4 Qe3+ Kg2 Qg5+ Kh3 Ke3 Bd7 Kf2 Nf5 Qg6 Kh4 Qh7+ Kg4 Qxd7;
8/2p5/2B5/1P5q/8/2k2N2/4K3/8 w - -   acd 82/50; acs 157 ; acn 627366919; ce -12838 ; bm Kf2; pv Kf2 Qg4 Ke3 Qf5 Ne1 Qe5+ Kf2 Qf4+ Ke2 Qd2+ Kf1 Qb2 Ng2 Kd2 Kf2 Qc3 Nh4 Qe3+ Kg2 Qg5+ Kh3 Ke3 Bd7 Kf2 Nf5 Qg6 Kh4 Qh7+ Kg4 Qxd7;
8/2p5/2B5/1P6/8/2k2N1q/4K3/8 b - -   acd 80/46; acs 144 ; acn 570997508; ce 12838 ; bm Qe6+; pv Qe6+ Kf2 Qg4 Ke3 Qf5 Ne1 Qe5+ Kf2 Qf4+ Ke2 Qd2+ Kf1 Qb2 Ng2 Kd2 Kf2 Qc3 Nh4 Qe3+ Kg2 Qg5+ Kh3 Ke3 Bd7 Kf2 Nf5 Qg6 Kh4 Qh7+ Kg4 Qxd7;
8/2p5/2B5/1P6/8/2k4q/3NK3/8 w - -   acd 81/49; acs 158 ; acn 617934133; ce -12838 ; bm Nf3; pv Nf3 Qh5 Kf2 Qg4 Ke3 Qf5 Ne1 Qe5+ Kf2 Qf4+ Ke2 Qd2+ Kf1 Qb2 Ng2 Kd2 Kf2 Qc3 Nh4 Qe3+ Kg2 Qg5+ Kh3 Ke3 Bd7 Kf2 Nf5 Qg2+ Kh4 Qd5 b6 Qxd7;
8/2p5/2B5/1P6/1k6/7q/3NK3/8 b - -   acd 79/56; acs 149 ; acn 580860515; ce 12837 ; bm Kc3; pv Kc3 Nf3 Qc8 Kf2 Qg4 Ke3 Qf5 Ne1 Qe5+ Kf2 Qf4+ Ke2 Qd2+ Kf1 Qb2 Ng2 Kd2 Kf2 Qa3 Nh4 Qe3+ Kg2 Qg5+ Kh3 Ke3 Bd7 Kf2 Nf5 Qg2+ Kh4 Qd5 Kh5 Qxd7;
8/2p5/2B5/1P6/1k2N3/7q/4K3/8 w - -   acd 74/54; acs 156 ; acn 596624536; ce -12837 ; bm Nd2; pv Nd2 Kc3 Nf3 Qe6+ Kf2 Qg4 Ke3 Qf5 Ne1 Qe5+ Kf2 Qf4+ Ke2 Qd2+ Kf1 Qb2 Ng2 Kd2 Kf2 Qb3 Nh4 Qe3+ Kg2 Qg5+ Kh3 Ke3 Bd7 Kf2 Nf5 Qg6 Bc8 Qh5+ Nh4 Qxb5;
8/2p5/2B5/1P6/1k2N3/6q1/4K3/8 b - -   acd 72/59; acs 147 ; acn 571590126; ce 12837 ; bm Qh3; pv Qh3 Nd2 Kc3 Nf3 Qe6+ Kf2 Qg4 Ke3 Qf5 Ne1 Qe5+ Kf2 Qf4+ Ke2 Qd2+ Kf1 Qb2 Ng2 Kd2 Kf2 Qc3 Nh4 Qe3+ Kg2 Qg5+ Kh3 Ke3 Bd7 Kf2 Nf5 Qg6 Kh4 Qh7+ Kg4 Qxd7;
8/2p5/2B5/1P6/1k6/6q1/3NK3/8 w - -   acd 72/71; acs 147 ; acn 582082813; ce -12836 ; bm Ne4; pv Ne4 Qh3 Nd2 Kc3 Nf3 Qe6+ Kf2 Qg4 Ke3 Qf5 Ne1 Qe5+ Kf2 Qf4+ Ke2 Qd2+ Kf1 Qb2 Ng2 Kd2 Kf2 Qc3 Nh4 Qe3+ Kg2 Qg5+ Kh3 Ke3 Bd7 c6 b6 Qb5 Nf5+ Kf4 b7 Qxb7;
8/2p5/2B5/1P6/1k6/2q5/3NK3/8 b - -   acd 76/69; acs 153 ; acn 606606305; ce 12836 ; bm Qh3; pv Qh3 Ne4 Kc4 Nd2+ Kc3 Nf3 Qe6+ Kf2 Qg4 Ke3 Qf5 Ne1 Qe5+ Kf2 Qf4+ Ke2 Qd2+ Kf1 Qb2 Ng2 Kd2 Kf2 Qc3 Nh4 Qe3+ Kg2 Qg5+ Kh3 Ke3 Bd7 Kf2 Nf5 Qg2+ Kh4 Qd5 Kh5 Qxd7;
8/2p5/2B5/1P6/1k6/2qK4/3N4/8 w - -   acd 74/65; acs 150 ; acn 586173715; ce -12835 ; bm Ke2; pv Ke2 Qh3 Ne4 Kc4 Nd2+ Kc3 Nf3 Qe6+ Kf2 Qg4 Ke3 Qf5 Ne1 Qe5+ Kf2 Qf4+ Ke2 Qd2+ Kf1 Qb2 Ng2 Kd2 Kf2 Qc3 Nh4 Qe3+ Kg2 Qg5+ Kh3 Ke3 Bd7 Kf2 Nf5 Qg6 Kh4 Qh7+ Kg5 Qxd7;
8/2p5/2B5/1P2q3/1k6/3K4/3N4/8 b - -   acd 77/66; acs 154 ; acn 609737728; ce 12835 ; bm Qc3+; pv Qc3+ Ke2 Qh3 Ne4 Kc4 Nd2+ Kc3 Nf3 Qe6+ Kf2 Qg4 Ke3 Qf5 Ne1 Qe5+ Kf2 Qf4+ Ke2 Qd2+ Kf1 Qb2 Ng2 Kd2 Kf2 Qc3 Nh4 Qe3+ Kg2 Qg5+ Kh3 Ke3 Bd7 Kf2 Nf5 Qg2+ Kh4 Qd5 Bc6 Qxf5;
8/2p5/2B5/1P2q3/1k6/4K3/3N4/8 w - -   acd 76/59; acs 159 ; acn 635633857; ce -12835 ; bm Kd3; pv Kd3 Qc3+ Ke2 Qh3 Ne4 Kc4 Nd2+ Kc3 Nf3 Qe6+ Kf2 Qg4 Ke3 Qf5 Ne1 Qe5+ Kf2 Qf4+ Ke2 Qd2+ Kf1 Qb2 Ng2 Kd2 Kf2 Qc3 Nh4 Qe3+ Kg2 Qg5+ Kh3 Ke3 Bd7 c6 b6 Qb5 Nf5+ Kf2 Nh4 Qxb6;
8/2p5/2B5/1P3q2/1k6/4K3/3N4/8 b - -   acd 75/64; acs 155 ; acn 621217975; ce 12834 ; bm Qe5+; pv Qe5+ Kd3 Qc3+ Ke2 Qh3 Ne4 Kc4 Nd2+ Kc3 Nf3 Qe6+ Kf2 Qg4 Ke3 Qf5 Ne1 Qe5+ Kf2 Qf4+ Ke2 Qd2+ Kf1 Qb2 Ng2 Kd2 Kf2 Qc3 Nh4 Qe3+ Kg2 Qg5+ Kh3 Ke3 Bd7 c6 Nf5+ Kf3 Nh4+ Kf2 Nf5 cxb5;
8/2p5/2B5/1P3q2/1k6/4KN2/8/8 w - -   acd 58/83; acs 154 ; acn 601509911; ce -12831 ; bm Nd4; pv Nd4 Qg4 Kd3 Qg6+ Ke3 Kc3 Ne2+ Kc4 Nf4 Qf5 Kf3 Kd4 Kg3 Ke5 Ng2 Qd3+ Kg4 Kf6 Nh4 Qd4+ Kg3 Qe5+ Kf2 Qc5+ Kf3 Qh5+ Kg3 Qg5+ Kh3 Qg8 Ng2 Kg5 Kg3 Qf8 Ne1 Qf4+ Kg2 Qd2+ Kf1 Kf4 Nf3 Qd3+ Kf2 Qe3+ Kg2 Qe2+ Kg1 Qxf3;
8/2p5/2B5/1P6/1k6/4KN1q/8/8 b - -   acd 65/84; acs 155 ; acn 605244443; ce 12833 ; bm Qf5; pv Qf5 Nd4 Qg4 Kd3 Qg6+ Ke3 Kc3 Ne2+ Kc4 Nf4 Qf5 Ne2 Qd3+ Kf2 Qa3 Nf4 Kd4 Ne2+ Kd3 Nf4+ Kd2 Kg2 Ke3 Nd5+ Ke4 Nf6+ Kf5 Ne4 Kf4 Nf2 Qg3+ Kf1 Ke3 Nd1+ Kd2 Nf2 Qg8 Nh3 Ke3 Nf2 Qf7 Ke1 Qxf2+;
8/2p5/2B5/1P6/1k6/3K1N1q/8/8 w - -   acd 60/81; acs 150 ; acn 579931110; ce -12832 ; bm Ke3; pv Ke3 Qf5 Nd4 Qg4 Kd3 Qg6+ Ke3 Kc3 Ne2+ Kc4 Nf4 Qf5 Kf3 Kd4 Kg3 Ke5 Ng2 Qf6 Kg4 Qe6+ Kf3 Qh3+ Ke2 Kd4 Ke1 Kc3 Ke2 Qd3+ Ke1 Kc2 Kf2 Kd2 Nh4 Qe3+ Kg2 Qg5+ Kh3 Ke3 Bd7 Kf2 Nf5 Qg2+ Kh4 Qd5 Bc6 Qxf5;
8/2p5/2B5/1P6/1k6/4KNq1/8/8 w - -   acd 60/91; acs 159 ; acn 639369833; ce -12832 ; bm Kd3; pv Kd3 Qg4 Nd2 Qd1 Ke3 Qc1 Kd3 Qc3+ Ke2 Qh3 Ne4 Kc4 Nd2+ Kc3 Nf3 Qe6+ Kf2 Qg4 Ke3 Qf5 Ne1 Qe5+ Kf2 Qf4+ Ke2 Qd2+ Kf1 Qb2 Ng2 Kd2 Kf2 Qc3 Nh4 Qe3+ Kg2 Qg5+ Kh3 Ke3 Bd7 Kf2 Nf5 Qg2+ Kh4 Qd5 Nd6 cxd6;
8/2p5/2B5/1P6/1k6/3K1Nq1/8/8 b - -   acd 50/96; acs 127 ; acn 515158523; ce 2566 ; bm Qf4; pv Qf4 Nd4 Qh4 Ke3 Qg4 Kd3 Qf4 Ne2 Qf5+ Ke3 Qe5+ Kf3 Qh5+ Kf2 Kc5 Ke3 Kc4 Ng3 Qc5+ Ke4 Qe7+ Kf3 Qg5 Ne2 Qh5+ Kf2 Qe5 Kf3 Qf5+ Nf4 Kd4 Kg3 Ke5 Nh3 Qg6+ Kf3 Qf7+ Kg4 Qe6+ Kg3 Qg8+ Kf3 Qc4 Kg3 Qd3+ Kg2 Qe2+ Kg3 Qe3+ Kg2 Qd3 Nf2 Qa3 Kg1 Qg3+ Kf1 Kd4 Nd1 Qb3 Ke1 Kd3 Nf2+ Ke3 Nd1+ Kd4 Nf2 Qb1+ Ke2 Qc2+ Kf3 Qb3+ Ke2 Qe3+ Kf1 Qf4 Ke2 Qg3 Nd1 Qe5+ Kd2 Qh2+ Ke1 Qg1+ Kd2 Qg5+ Ke2 Qh5+ Ke1;
8/2p5/2B5/1P6/1k5q/4KN2/8/8 b - -   acd 65/89; acs 157 ; acn 640759945; ce 12832 ; bm Qg3; pv Qg3 Kd3 Qg4 Nd2 Qd1 Ke3 Qc1 Kd3 Qc3+ Ke2 Qh3 Ne4 Kc4 Nd2+ Kd4 Nf3+ Kc3 Kf2 Qg4 Ke3 Qf5 Ne1 Qe5+ Kf2 Qf4+ Ke2 Qd2+ Kf1 Qb2 Ng2 Kd2 Kf2 Qa3 Nh4 Qe3+ Kg2 Qg5+ Kh3 Ke3 Bd7 Kf2 Nf5 Qg6 Kh4 Qh7+ Kg4 Qxd7;
8/2p5/2B5/1P2N3/1k5q/4K3/8/8 w - -   acd 58/87; acs 150 ; acn 667198846; ce -576 ; bm Kf3; pv Kf3 Kc3 Ng4 Kd4 Kf4 Qh5 Kf3 Qf7+ Kg2 Qf4 Kh3 Kd3 Kh4 Kd2 Kh3 Kc3 Nh2 Qh6+ Kg2 Qg5+ Kf3 Qf6+ Kg2 Kc2 Kg3 Qd6+ Kg2 Qf4 Kh3 Kd1 Ng4 Kd2 Kh4 Kc2 Kh3 Qd6 Ne3+ Kd3 Ng2 Kd4 Kg4 Qg6+ Kf4 Qf7+ Kg5 Ke5 Kg4 Qf6 Nh4 Qg7+ Kf3 Qf7+ Kg3 Qf4+ Kh3 Qe3+ Kg4 Qd4+ Kg3 Qg1+ Kf3 Qg8 Ng2 Kd4 Kf4 Qf8+ Kg5 Qe7+ Kh5 Qh7+ Kg4 Qg7+ Kf4 Qf6+ Kg3 Qg5+ Kf3 Qf5+ Ke2 Qd3+ Ke1 Qh3 Kd2 Qg4 Ne1 Qg5+ Kc2 Qf5+ Kd1;
8/2p5/2B5/kP2N3/7q/4K3/8/8 b - -   acd 62/84; acs 94 ; acn 424502718; ce 484 ; bm Kb4; pv Kb4 Kf3 Kc3 Ng4 Qh5 Kg3 Qf5 Ne3 Qf7 Ng4 Kd4 Nh2 Qh5 Ng4 Qf5 Kh4 Qf4 Kh3 Kc5 Nh2 Qe5 Ng4 Qh5+ Kg3 Qf5 Ne3 Qe5+ Kf3 Kd4 Ng4 Qd6 Kg2 Qa3 Kh2 Qd3 Kg2 Kc5 Kh2 Qb3 Kg2 Kd6 Kf2 Ke6 Ke2 Qc2+ Ke3 Qc5+ Kf4 Qf5+ Kg3 Qf8 Ne3 Ke5 Ng2 Qf5 Kh4 Qf1 Kg3 Qd3+ Kf2 Kd4 Ne1 Qd2+ Kf1 Kc3 Nf3 Qb2 Ne5 Kd4 Ng4 Qc2 Nf2;
8/2pN4/2B5/kP6/7q/4K3/8/8 w - -   acd 53/83; acs 125 ; acn 583086041; ce -528 ; bm Nc5; pv Nc5 Kb4 Ne4 Qd8 Kf4 Kc4 Kf5 Qe7 Nf6 Kd4 Ng4 Qf8+ Kg5 Qf7 Kh4 Qf4 Kh3 Kd3 Kh4 Kc4 Kh5 Kd4 Kh4 Kc5 Kh3 Kc4 Nh2 Qh6+ Kg3 Qd6+ Kh3 Qd3+ Kh4 Qh7+ Kg3 Qe7 Kf3 Qd6 Ng4 Kd4 Kg2 Kd3 Kf3 Qf8+ Kg2 Kc3 Ne3 Qf7 Kg3 Kd4 Ng2 Qf5 Ne1 Ke3 Ng2+ Kd3 Nf4+ Kd4 Ng2 Qd3+ Kh4 Ke5 Kg4 Qf5+ Kg3 Qf6 Kh3 Qg7 Kh2 Kf5 Kg1 Qb2 Nh4+ Kf4;
8/2pN4/2B5/kP6/1q6/4K3/8/8 b - -   acd 56/87; acs 75 ; acn 332779237; ce 487 ; bm Qh4; pv Qh4 Nc5 Kb4 Nd3+ Kc4 Nf4 Qe7+ Kf3 Qe5 Kg4 Qf6 Kf3 Kd4 Kg4 Ke5 Nd3+ Kd6 Nf4 Kc5 Kf3 Qf5 Be4 Qf7 Bc6 Kd4 Kg4 Ke5 Nd3+ Ke6 Nf4+ Kf6 Ng2 Qg6+ Kf3 Qd3+ Kg4 Qf5+ Kh4 Qg5+ Kh3 Ke5 Nh4 Qe3+ Kg4 Qd4+ Kg3 Qg1+ Kf3 Qh2 Kg4 Qf4+ Kh3 Kd4 Ng2 Qf7 Kg4 Qe7 Kf5 Qe5+ Kg4 Qe6+ Kg3 Qg6+ Kf3 Qh5+ Kg3 Ke5 Ne1 Qg5+ Kf3 Qf4+ Ke2 Kd4 Ng2 Qf8 Ne1 Qf5 Nf3+ Kc4 Nd2+ Kc3 Ne4+ Kd4 Ng3;
8/2pN4/2B5/kP6/1q6/3K4/8/8 w - -   acd 57/93; acs 155 ; acn 927741809; ce -462 ; bm Nb8; pv Nb8 Qd6+ Kc3 Qf6+ Kd3 Qg6+ Kd4 Qg7+ Ke4 Qh7+ Kf4 Kb4 Nd7 Kc4 Ne5+ Kc5 Nf3 Qf7+ Ke4 Qe6+ Kf4 Kd6 Kg5 Qg8+ Kf4 Qf7+ Ke4 Qh7+ Ke3 Qe7+ Kf4 Qf8+ Ke4 Qh6 Kf5 Qh7+ Kf6 Qh5 Ng5 Qh6+ Kf5 Qf8+ Ke4 Qf1 Nf3 Qb1+ Kf4 Qd3 Ng5 Qf1+ Kg4 Qc4+ Kf5 Qc5+ Kf4 Qe5+ Kg4 Kc5 Nf3 Qf6 Nh4 Qd4+ Kg3 Qc3+ Kg4 Kd4 Kf4 Qe3+ Kg4 Qf2 Nf3+ Ke3 Kf5 Qc2+ Kf6 Kf4 Nh4 Qb2+ Kf7 Qf2 Nf3 Qc2 Ke6 Qf5+ Ke7 Ke3 Ne1 Kd4;
8/2pN4/2B5/kP6/q7/3K4/8/8 b - -   acd 61/87; acs 89 ; acn 389598955; ce 450 ; bm Kb4; pv Kb4 Kd4 Qd1+ Ke4 Kc3 Ke5 Qd6+ Ke4 Qe7+ Kd5 Qe3 Ne5 Qd4+ Ke6 Qd6+ Kf5 Kd4 Nf3+ Kc5 Ng5 Kc4 Nf3 Qe7 Ne5+ Kc5 Kf4 Qe6 Ng4 Kd4 Kg5 Qe1 Kf4 Qe7 Kf5 Qf7+ Kg5 Qe6 Kf4 Qe2 Kg5 Kc4 Kf4 Kc3 Ne5 Qd2+ Kg4 Qd1+ Kg5 Qd4 Nf3 Qc5+ Kg6 Qd6+ Kf5 Qe7 Ne5 Kc2 Nf3 Kd3 Ne5+ Ke3 Bd7 Qf8+ Ke6 Qd6+ Kf5 Kd4 Nf3+ Kc5 Bc6 Qd3+ Kf4 Qg6 Ke3 Qf5 Nd2 Qe5+ Kd3 Qd6+ Ke3 Qd4+ Ke2 Qf4 Kd3 Kb4 Ne4;
1N6/2p5/2B5/kP6/q7/3K4/8/8 w - -   acd 52/79; acs 88 ; acn 419574189; ce -468 ; bm Nd7; pv Nd7 Qb4 Nb8 Qf4 Kc3 Qh4 Nd7 Qg4 Nb8 Qg7+ Kd3 Qh7+ Ke3 Qh8 Na6 Qc3+ Ke4 Kb6 Kd5 Qc1 Kd4 Qc2 Kd5 Qf5+ Kd4 Qf7 Ke4 Qc4+ Ke5 Qe2+ Kd4 Qd2+ Kc4 Qd6 Nb8 Qc5+ Kd3 Qf5+ Kd4 Qf6+ Kd3 Qg6+ Kd4 Qg1+ Kd3 Qf1+ Kd4 Qf2+ Kc3 Qe3+ Kc4 Qc1+ Kd4 Qb2+ Kc4 Qe2+ Kd4 Qd1+ Ke5 Qe1+ Kd4 Qa1+ Kd3 Kc5 Nd7+ Kd6 Kc4 Qa4+ Kd3 Qd1+ Kc3 Qe1+ Kb3 Qg3+ Kc4 Qg7 Kd3 Qb2 Kc4;
1b6/2pN4/2B5/kP6/8/3K4/8/q7 w - -   acd 53/80; acs 154 ; acn 962366387; ce -480 ; bm Nxb8; pv Nxb8 Qh8 Nd7 Qh4 Kc3 Qg4 Ne5 Qb4+ Kd3 Qf4 Nf3 Kb4 Nd4 Qe5 Nc2+ Kc5 Kd2 Qg3 Ne3 Qf2+ Kd3 Qh4 Nc2 Qg3+ Kd2 Qg5+ Kd3 Qd8+ Ke2 Qe7+ Kd2 Qe5 Kd3 Qf5+ Kc3 Qe6 Kd2 Kc4 Ne3+ Kd4 Nc2+ Kc5 Ne3 Qf6 Nc2 Qf2+ Kd3 Qh4 Ne3 Qd4+ Ke2 Qb2+ Kd3 Qh8 Nc2 Qh3+ Ne3 Qh7+ Kd2 Qh2+ Kd3 Qf4 Nc2 Qd6+ Ke2 Kc4 Ne3+ Kc3 Kf3 Qe5 Ng4 Qf5+ Kg3 Kd4 Kh3 Qg5 Kg3 Kc4 Kf3 Kd3;
1N6/2p5/2B5/kP6/8/3K4/8/q7 b - -   acd 53/84; acs 151 ; acn 817101334; ce 463 ; bm Qf1+; pv Qf1+ Kd4 Qf4+ Kd5 Qg5+ Ke4 Qg6+ Kf4 Qe6 Nd7 Kb4 Ne5 Kc5 Nf3 Kd6 Kg3 Qh6 Kg4 Qg6+ Kf4 Qf6+ Ke4 Qe7+ Kf5 Qe6+ Kf4 Qg6 Ke3 Qg4 Ne1 Qe6+ Kf2 Kc5 Nf3 Qh3 Ke3 Kd6 Kd2 Qg4 Ne1 Qg5+ Ke2 Qe5+ Kd2 Qh2+ Kd3 Kc5 Nf3 Qh6 Ne5 Qh7+ Ke3 Qf5 Nd3+ Kc4 Nf4 Qf8 Ke4 Qf6 Ke3 Qf5 Ng2 Qe5+ Kf3 Qh5+ Kf2 Qf7+ Ke3 Qe7+ Kf4 Kd4 Kg4;
1b6/2pN4/1kB5/1P6/8/3K4/8/q7 b - -   acd 50/72; acs 68 ; acn 547229727; ce 512 ; bm Ka7; pv Ka7 Ke3 Qb2 Kd3 Qb3+ Kd4 Qd1+ Kc4 Qf1+ Kd5 Qf4 Ne5 Qg5 Ke4 Qg2+ Kd4 Qg7 Ke4 Qh7+ Kd4 Qh8 Kd5 Qd8+ Nd7 Qg5+ Ke4 Qg2+ Kf4 Qd2+ Kf5 Qc2+ Ke5 Qd1 Ke4 Qa4+ Kd3 Qf4 Kc3 Qh4 Kd3 Qe1 Kd4 Qb4+ Ke3 Qc4 Ne5 Qe6 Kf4 Qf6+ Ke4 Qh4+ Kd5 Qh5 Ke4 Qe2+ Kf4 Qd2+ Kf5 Qc2+ Kg5 Qf2 Nd7 Qf7 Kg4 Qe6+ Kf4 Qh6+ Ke4 Qd6 Kf5 Qb4 Ke5;
1b6/2p5/1kB5/1PN5/8/3K4/8/q7 w - -   acd 43/76; acs 105 ; acn 693940995; ce -505 ; bm Nd7+; pv Nd7+ Ka7 Ke4 Qe1+ Kd3 Qb4 Ne5 Qd6+ Ke4 Qc5 Nd7 Qc4+ Ke3 Qc3+ Ke4 Qd2 Ne5 Qe2+ Kd4 Qf2+ Kd3 Qf5+ Kd4 Qf4+ Kd5 Qg5 Kd4 Qd8+ Nd7 Qh4+ Ke3 Qc4 Ne5 Qc3+ Ke4 Qe1+ Kd4 Qg1+ Kd5 Qg8+ Kd4 Qg7 Ke4 Qe7 Kd5 Qd8+ Nd7 Qg5+ Ke4 Qg4+ Kd5 Qg2+ Kd4 Qb2+ Ke4 Qb4+ Kd5 Qb3+ Kd4 Qd1+ Ke4 Qc2+ Kd4 Qf2+ Ke4 Qe2+ Kd4 Qd2+ Ke4 Qb2 Ne5 Qg2+ Kd3 Qh3+ Kd4 Qh8;
Taking ideas is not a vice, it is a virtue. We have another word for this. It is called learning.
But sharing ideas is an even greater virtue. We have another word for this. It is called teaching.
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mcostalba
Posts: 2684
Joined: Sat Jun 14, 2008 9:17 pm

Re: "Poor Fish": very hard test suite

Post by mcostalba »

mcostalba wrote: A tactical combination, even if complex, cannot survive a deep engine search instead winning by along term plan it can. For instance see this study:

https://mcostalba.github.io/PoorFish/positions/pf001

After reading the explanation linked at the bottom of the page it amazes me the deepness of the idea: move now to avoid a zugzwang about 10 moves later!
This is another amazing zugzwang theme position, this one from a real game:

https://mcostalba.github.io/PoorFish/positions/pf004

Eventually you need to follow the pgn until the end to really see the zugzwang

[pgn]
[Event “URS”]
[Site “URS”]
[Date “1976.??.??”]
[EventDate “?”]
[Round “?”]
[Result “1-0”]
[White “Vladimir Bagirov”]
[Black “Karen Ashotovich Grigorian”]
[ECO “A01”]
[WhiteElo “?”]
[BlackElo “?”]
[PlyCount “59”]

1. b3 Nf6 2.Bb2 g6 3.e4 d6 4.g3 Bg7 5.Bg2 O-O 6.Ne2 e5 7.O-O Nh5 8.d4 Nd7 9.Nd2 Qe7 10.f4 exd4 11.Bxd4 f5 12.Bxg7 Nxg7 13.Nc3 Nf6 14.Re1 Qd8 15.Nc4 fxe4 16.Nxe4 Nxe4 17.Bxe4 Rb8 18.Qd4 b6 19.Bd5+ Kh8 20.Re3 c5 21.Qc3 b5 22.Rae1 Qf6 23.Qxf6 Rxf6 24.Re8+ Nxe8 25.Rxe8+ Kg7 26.Rg8+ Kh6 27.Ne3 a5 28.h4 a4 29.Kf2 c4 30.b4 1-0
[/pgn]
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peter
Posts: 3186
Joined: Sat Feb 16, 2008 7:38 am
Full name: Peter Martan

Re: "Poor Fish": very hard test suite

Post by peter »

mcostalba wrote: Eventually you need to follow the pgn until the end to really see the zugzwang
Or you simply switch off nullmove- pruning.
:)


1rb4k/p5np/3p1rp1/1ppB4/2N2P2/1P2R1P1/P1P4P/4R1K1 w - - 0 1

Analysis by SF 171114IPx 64 POPCNTe:
...
24.Sd2
+/- (0.76 ++) Tiefe: 23/26 00:00:05 30486kN
24.Te8+
+/- (0.79 ++) Tiefe: 23/27 00:00:05 34202kN
...
24.Te8+ Sxe8 25.Txe8+ Kg7 26.Tg8+ Kh6 27.Se3 b4 28.h4 Tf5 29.Kf2 Txd5 30.Sxd5 Lb7 31.Txb8 Lxd5 32.Td8 Le4 33.Txd6 Lxc2 34.Ta6 Ld3 35.Txa7 c4 36.bxc4
+- (1.63) Tiefe: 23/32 00:00:05 39823kN
...
24.Te8+ Sxe8 25.Txe8+ Kg7 26.Tg8+ Kh6 27.Se3 a6 28.h4 Tf5 29.Kf2 Lb7 30.Sxf5+ gxf5 31.Txb8 Lxd5 32.Tb6 Le4 33.Txa6 Kh5 34.Txd6 b4 35.Td7 Kg6 36.Tc7 Lxc2 37.Txc5 Ld3 38.Ta5 Lb1 39.a4 bxa3 40.Txa3 Ld3 41.Ke3 Le4 42.b4 Kh5 43.Ta7 Kg4
+- (2.27) Tiefe: 36/42 00:02:04 2012MN
Peter.
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Vinvin
Posts: 5228
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: "Poor Fish": very hard test suite

Post by Vinvin »

Correct quotes in PGN.
mcostalba wrote:
mcostalba wrote: A tactical combination, even if complex, cannot survive a deep engine search instead winning by along term plan it can. For instance see this study:

https://mcostalba.github.io/PoorFish/positions/pf001

After reading the explanation linked at the bottom of the page it amazes me the deepness of the idea: move now to avoid a zugzwang about 10 moves later!
This is another amazing zugzwang theme position, this one from a real game:

https://mcostalba.github.io/PoorFish/positions/pf004

Eventually you need to follow the pgn until the end to really see the zugzwang

[pgn]
[Event "URS"]
[Site "URS"]
[Date "1976.??.??"]
[EventDate "?"]
[Round "?"]
[Result "1-0"]
[White "Vladimir Bagirov"]
[Black "Karen Ashotovich Grigorian"]
[ECO "A01"]
[WhiteElo "?"]
[BlackElo "?"]
[PlyCount "59"]

1. b3 Nf6 2.Bb2 g6 3.e4 d6 4.g3 Bg7 5.Bg2 O-O 6.Ne2 e5 7.O-O Nh5 8.d4 Nd7 9.Nd2 Qe7 10.f4 exd4 11.Bxd4 f5 12.Bxg7 Nxg7 13.Nc3 Nf6 14.Re1 Qd8 15.Nc4 fxe4 16.Nxe4 Nxe4 17.Bxe4 Rb8 18.Qd4 b6 19.Bd5+ Kh8 20.Re3 c5 21.Qc3 b5 22.Rae1 Qf6 23.Qxf6 Rxf6 24.Re8+ Nxe8 25.Rxe8+ Kg7 26.Rg8+ Kh6 27.Ne3 a5 28.h4 a4 29.Kf2 c4 30.b4 1-0
[/pgn]
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mar
Posts: 2559
Joined: Fri Nov 26, 2010 2:00 pm
Location: Czech Republic
Full name: Martin Sedlak

Re: "Poor Fish": very hard test suite

Post by mar »

peter wrote:Or you simply switch off nullmove- pruning.
:)
Exactly, adding a simple UCI option for this is trivial (I have one in my engine)
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