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Up Topic The Rybka Lounge / Test Positions / It seems to be easy
- - By dorszcz (*) Date 2018-12-06 12:10
It's strange but most engines have problem with it.

E8500 2x3.16GHz, 5-men Syzygy on SSD:

Stockfish 10 didn't find the move in 60 minutes.
asmFishWCP_2018-10-17 found it in 32 minutes.
Sting 10.1 needed only 1 second.

Find checkmate. If your engine shows +4, +7 , +12 etc. for white it means it's wrong move.

5brq/4p1kp/4K1Np/2p4p/2P4B/4N2B/4P3/8 w - - 0 1

Author Viktor Syzonenko
Parent - - By Vinvin (***) [be] Date 2018-12-06 12:52 Edited 2018-12-06 12:55
Stockfish-Matefinder 10 finds it immediately as Sting :


MateFinder.10.x64.bmi2:
...
16/25  00:00   650k  5.800k  +1,68  1.Nxh8 Kxh8 2.Kf7 e6 3.Bxe6 Bg7 4.Be7 h4 5.Bf5 Ra8 6.Bxh4 h5 7.Be7 Ra7 8.Ke6 Bd4 9.Nd5 Ra6+ 10.Kd7 Ra4
17/26  00:00   992k  6.125k  +1,75  1.Nxh8 Kxh8 2.Kf7 Bg7 3.Bxe7 h4 4.Bxc5 Be5 5.Bf5 Rg3 6.Ng4 Bg7 7.Bd6 h5 8.Nf6 Rc3 9.Nxh5 Bd4
18/27  00:00   1.628k  6.435k  +2,10  1.Nxh8 Kxh8 2.Kf7 Bg7 3.Bxe7 Rb8 4.Bf5 Rb7 5.Be4 Ra7 6.Nf5 Bc3 7.Ke6 Ra6+ 8.Kd7 Ra4 9.Bd5 h4
19/25  00:00   2.268k  6.499k  +M6  1.Nf5+ Kxg6 2.Ng7 Kxg7 3.e4 Kg6 4.Bf5+ Kg7 5.Bg3 h4 6.Be5+
20/12  00:00   2.495k  6.567k  +M6  1.Nf5+ Kxg6 2.Ng7 Kxg7 3.e4 Kg6 4.Bf5+ Kg7 5.Bg3 h4 6.Be5+
21/12  00:00   2.704k  6.610k  +M6  1.Nf5+ Kxg6 2.Ng7 Kxg7 3.e4 Kg6 4.Bf5+ Kg7 5.Bg3 h4 6.Be5+
22/12  00:00   2.975k  6.715k  +M6  1.Nf5+ Kxg6 2.Ng7 Kxg7 3.e4 Kg6 4.Bf5+ Kg7 5.Bg3 h4 6.Be5+
23/12  00:00   3.267k  6.793k  +M6  1.Nf5+ Kxg6 2.Ng7 Kxg7 3.e4 Kg6 4.Bf5+ Kg7 5.Bg3 h4 6.Be5+
24/12  00:00   3.314k  6.805k  +M6  1.Nf5+ Kxg6 2.Ng7 Kxg7 3.e4 Kg6 4.Bf5+ Kg7 5.Bg3 h4 6.Be5+
25/12  00:00   3.806k  6.920k  +M6  1.Nf5+ Kxg6 2.Ng7 Kxg7 3.e4 Kg6 4.Bf5+ Kg7 5.Bg3 h4 6.Be5+
26/12  00:00   4.050k  7.019k  +M6  1.Nf5+ Kxg6 2.Ng7 Kxg7 3.e4 Kg6 4.Bf5+ Kg7 5.Bg3 h4 6.Be5+
27/12  00:00   4.667k  7.146k  +M6  1.Nf5+ Kxg6 2.Ng7 Kxg7 3.e4 Kg6 4.Bf5+ Kg7 5.Bg3 h4 6.Be5+
28/12  00:00   4.734k  7.163k  +M6  1.Nf5+ Kxg6 2.Ng7 Kxg7 3.e4 Kg6 4.Bf5+ Kg7 5.Bg3 h4 6.Be5+
29/12  00:00   5.415k  7.298k  +M6  1.Nf5+ Kxg6 2.Ng7 Kxg7 3.e4 Kg6 4.Bf5+ Kg7 5.Bg3 h4 6.Be5+
30/12  00:00   6.351k  7.368k  +M6  1.Nf5+ Kxg6 2.Ng7 Kxg7 3.e4 Kg6 4.Bf5+ Kg7 5.Bg3 h4 6.Be5+
31/12  00:00   7.697k  7.720k  +M6  1.Nf5+ Kxg6 2.Ng7 Kxg7 3.e4 Kg6 4.Bf5+ Kg7 5.Bg3 h4 6.Be5+
32/12  00:01   8.093k  7.858k  +M6  1.Nf5+ Kxg6 2.Ng7 Kxg7 3.e4 Kg6 4.Bf5+ Kg7 5.Bg3 h4 6.Be5+
33/12  00:01   9.220k  8.202k  +M6  1.Nf5+ Kxg6 2.Ng7 Kxg7 3.e4 Kg6 4.Bf5+ Kg7 5.Bg3 h4 6.Be5+
34/12  00:01   12.046k  8.949k  +M6  1.Nf5+ Kxg6 2.Ng7 Kxg7 3.e4 Kg6 4.Bf5+ Kg7 5.Bg3 h4 6.Be5+
35/12  00:01   13.770k  9.323k  +M6  1.Nf5+ Kxg6 2.Ng7 Kxg7 3.e4 Kg6 4.Bf5+ Kg7 5.Bg3 h4 6.Be5+
36/12  00:01   14.666k  9.437k  +M6  1.Nf5+ Kxg6 2.Ng7 Kxg7 3.e4 Kg6 4.Bf5+ Kg7 5.Bg3 h4 6.Be5+
37/12  00:01   17.222k  9.396k  +M6  1.Nf5+ Kxg6 2.Ng7 Kxg7 3.e4 Kg6 4.Bf5+ Kg7 5.Bg3 h4 6.Be5+
38/12  00:02   21.547k  9.632k  +M6  1.Nf5+ Kxg6 2.Ng7 Kxg7 3.e4 Kg6 4.Bf5+ Kg7 5.Bg3 h4 6.Be5+
39/12  00:02   25.757k  9.861k  +M6  1.Nf5+ Kxg6 2.Ng7 Kxg7 3.e4 Kg6 4.Bf5+ Kg7 5.Bg3 h4 6.Be5+
Parent - By user923005 (****) [us] Date 2018-12-06 22:46
And for mates in 7 or less like this one, Chest is a very good choice:
Q:\>chest319 -b -M 1000 -z7 emat.epd
5brq/4p1kp/4K1Np/2p4p/2P4B/4N2B/4P3/8 w - - acn 190815; acs 0; bm Nf5+; ce 32756; dm 6;
pv Nf5+ Kxg6 Ng7 Kxg7 e3 Kg6 Bf5+ Kg7 Bg3 h4 Be5#;
Parent - By cc2150dx (**) [ca] Date 2018-12-07 16:43
Houdini 6 finds it in 1:41

FEN:
5brq/4p1kp/4K1Np/2p2N1p/2P4B/7B/4P3/8 b - - 1 1


Houdini 6:
14/32  00:00   2,340k  11,941k  +1.73  Ng6xh8 Kg7xh8 Ke6-f7 Bf8-g7 Bh4xe7 Bg7-e5 Bh3-f5 Be5-d4 Ne3-d5 Rg8-g7+ Kf7-e6 Rg7-g1 e2-e3 Rg1-e1 Ke6-f7 Bd4-g7 Be7xc5 Re1-c1 Bf5-d3 h5-h4 Kf7-e6
15/34  00:00   4,193k  12,083k  +1.78  Ng6xh8 Kg7xh8 Ke6-f7 Bf8-g7 Bh4xe7 Bg7-e5 Bh3-f5 h5-h4 Be7xh4 Rg8-a8 Bh4-e7 Ra8-a5 Bf5-e4 Be5-b2 Ne3-f5 h6-h5 Be4-d5
16/34  00:00   4,871k  12,147k  +1.71  Ng6xh8 Kg7xh8 Ke6-f7 Bf8-g7 Bh4xe7 Bg7-e5 Bh3-f5 h5-h4 Ne3-d5 Rg8-g5 Be7xg5 h6xg5 e2-e4 Be5-d4 Nd5-f6 Bd4-c3 Kf7-e6
17/38  00:00   6,404k  12,175k  +1.72  Ng6xh8 Kg7xh8 Ke6-f7 Bf8-g7 Bh4xe7 Bg7-a1 Ne3-f5 Rg8-g1 Be7xc5 Rg1-c1 Nf5-d6 Ba1-g7 Bh3-f5 h5-h4 Bc5-f2 Rc1-h1 c4-c5 h4-h3 Kf7-e6
18/38  00:00   8,595k  12,296k  +1.72  Ng6xh8 Kg7xh8 Ke6-f7 Bf8-g7 Bh4xe7 Bg7-e5 Bh3-f5 Be5-d4 Ne3-d5 Rg8-g7+ Kf7-e6 Rg7-g1 e2-e3 Rg1-e1 Be7-h4 Re1-h1 e3xd4 Rh1xh4 d4xc5 Rh4xc4 Ke6-d6 Kh8-g7 c5-c6
19/48  00:00   11,112k  12,333k  +1.87  Ng6xh8 Kg7xh8 Ke6-f7 Bf8-g7 Bh4xe7 Bg7-e5 Bh3-f5 Be5-d4 Ne3-d5 Rg8-g7+ Kf7-e6 Rg7-g1 e2-e3 Rg1-e1 Be7-h4 Re1-h1 e3xd4 Rh1xh4 d4xc5 Rh4xc4 Ke6-d6 Kh8-g7 c5-c6 h5-h4 c6-c7 Rc4xc7 Nd5xc7
20/48  00:01   23,049k  12,358k  +1.97  Ng6xh8 Kg7xh8 Ke6-f7 Bf8-g7 Bh4xe7 Bg7-a1 Ne3-f5 Rg8-a8 Bh3-g2 Ra8-a2 Bg2-f3 Ra2-c2 Nf5-e3 Rc2-a2 Bf3xh5 Ra2-a4 Bh5-f3 h6-h5 Bf3xh5 Ba1-d4 Bh5-f3 h7-h6 Ne3-f5 Ra4xc4 Nf5xd4
21/48  00:04   51,196k  12,606k  +2.21  Ng6xh8 Kg7xh8 Ke6-f7 Bf8-g7 Bh4xe7 Bg7-e5 Bh3-f5 h5-h4 Be7xc5 Rg8-a8 Ne3-g4 Ra8-a5 Bc5-b6 Ra5-a6 c4-c5 Be5-d4 e2-e3 Bd4-g7 Ng4-h2 Ra6-a8 e3-e4 Ra8-b8 Kf7-e6 Kh8-g8 Nh2-f3
21/48  00:04   52,781k  12,602k  +2.21  Ng6xh8 Kg7xh8 Ke6-f7 Bf8-g7 Bh4xe7 Bg7-e5 Bh3-f5 h5-h4 Be7xc5 Rg8-a8 Ne3-g4 Ra8-a5 Bc5-b6 Ra5-a6 c4-c5 Be5-d4 e2-e3 Bd4-g7 Ng4-h2 Ra6-a8 e3-e4 Ra8-b8 Kf7-e6 Kh8-g8 Nh2-f3
22/50+  00:06   80,378k  12,551k  +2.28  Ng6xh8
22/50-  00:06   85,254k  12,544k  +2.21  Ng6xh8 Kg7xh8
22/50+  00:07   93,816k  12,567k  +2.28  Ng6xh8
22/50-  00:07   97,390k  12,563k  +2.19  Ng6xh8 Kg7xh8
22/50+  00:08   112,509k  12,579k  +2.31  Ng6xh8
22/51  00:12   161,742k  12,568k  +2.34  Ng6xh8 Kg7xh8 Ke6-f7 Bf8-g7 Bh4xe7 Bg7-b2 Ne3-f5 Rg8-a8 Bh3-g2 Ra8-a7 e2-e4 h5-h4 Kf7-e6 Ra7-a6+ Be7-d6 Bb2-c1 Nf5xh4 Ra6-a4 Ke6-d5 Ra4-a2 Bg2-f3 Ra2-d2+ Kd5-e6 Rd2-c2 Ke6-f7 Bc1-b2 e4-e5 Rc2xc4 e5-e6
22/51  00:12   161,920k  12,567k  +2.34  Ng6xh8 Kg7xh8 Ke6-f7 Bf8-g7 Bh4xe7 Bg7-b2 Ne3-f5 Rg8-a8 Bh3-g2 Ra8-a7 e2-e4 h5-h4 Kf7-e6 Ra7-a6+ Be7-d6 Bb2-c1 Nf5xh4 Ra6-a4 Ke6-d5 Ra4-a2 Bg2-f3 Ra2-d2+ Kd5-e6 Rd2-c2 Ke6-f7 Bc1-b2 e4-e5 Rc2xc4 e5-e6
23/51+  00:13   174,216k  12,579k  +2.41  Ng6xh8
23/51+  00:16   206,388k  12,582k  +2.48  Ng6xh8
23/51-  00:16   208,785k  12,570k  +2.41  Ng6xh8 Kg7xh8
23/51  00:17   214,128k  12,564k  +2.30  Ng6xh8 Kg7xh8 Ke6-f7 Bf8-g7 Bh4xe7 Bg7-b2 Ne3-f5 Rg8-a8 Bh3-g2 Ra8-a7 e2-e4 h5-h4 Kf7-e6 Ra7-a6+ Be7-d6 Bb2-c1 Nf5xh4 Bc1-g5 Nh4-f5 h6-h5 Ke6-d5 h5-h4 e4-e5 Ra6-a2 Bg2-e4 h4-h3 e5-e6 h3-h2 e6-e7 Bg5xe7 Bd6xe7 Kh8-g8
23/51  00:17   215,252k  12,562k  +2.30  Ng6xh8 Kg7xh8 Ke6-f7 Bf8-g7 Bh4xe7 Bg7-b2 Ne3-f5 Rg8-a8 Bh3-g2 Ra8-a7 e2-e4 h5-h4 Kf7-e6 Ra7-a6+ Be7-d6 Bb2-c1 Nf5xh4 Bc1-g5 Nh4-f5 h6-h5 Ke6-d5 h5-h4 e4-e5 Ra6-a2 Bg2-e4 h4-h3 e5-e6 h3-h2 e6-e7 Bg5xe7 Bd6xe7 Kh8-g8
24/53+  00:18   226,758k  12,580k  +2.37  Ng6xh8
24/53+  00:18   235,176k  12,594k  +2.44  Ng6xh8
24/60+  00:23   293,788k  12,579k  +2.55  Ng6xh8
24/60  00:28   361,884k  12,555k  +2.47  Ng6xh8 Kg7xh8 Ke6-f7 Bf8-g7 Bh4xe7 Bg7-e5 Bh3-f5 h5-h4 Be7xc5 h6-h5 Ne3-d5 Rg8-g2 Bc5-e3 Rg2xe2 c4-c5 h4-h3 Bf5xh3 Re2-c2 Kf7-e6 Be5-g3 Bh3-f5 Rc2-c4 Nd5-b6 Rc4-h4 c5-c6 Kh8-g7 Ke6-d7 Bg3-e5 Nb6-d5 Rh4-c4 Bf5-d3 Rc4xc6 Kd7xc6
24/60  00:28   363,647k  12,555k  +2.47  Ng6xh8 Kg7xh8 Ke6-f7 Bf8-g7 Bh4xe7 Bg7-e5 Bh3-f5 h5-h4 Be7xc5 h6-h5 Ne3-d5 Rg8-g2 Bc5-e3 Rg2xe2 c4-c5 h4-h3 Bf5xh3 Re2-c2 Kf7-e6 Be5-g3 Bh3-f5 Rc2-c4 Nd5-b6 Rc4-h4 c5-c6 Kh8-g7 Ke6-d7 Bg3-e5 Nb6-d5 Rh4-c4 Bf5-d3 Rc4xc6 Kd7xc6
25/60  00:31   399,345k  12,542k  +2.41  Ng6xh8 Kg7xh8 Ke6-f7 Bf8-g7 Bh4xe7 Bg7-e5 Bh3-f5 Be5-d4 Ne3-c2 Bd4-b2 Be7xc5 h5-h4 e2-e4 Rg8-g7+ Kf7-e6 Rg7-g2 Nc2-b4 Bb2-a3 Bc5-d4+ Kh8-g8 Nb4-d5 Rg2-d2 Bd4-c3 Rd2-c2 e4-e5 Rc2-f2 Bc3-d4 Rf2-f3 Bf5-e4 Rf3-f1 c4-c5 Ba3xc5 Bd4xc5 h4-h3 Ke6-d7 Rf1-e1 e5-e6 h3-h2
25/60  00:32   403,152k  12,542k  +2.41  Ng6xh8 Kg7xh8 Ke6-f7 Bf8-g7 Bh4xe7 Bg7-e5 Bh3-f5 Be5-d4 Ne3-c2 Bd4-b2 Be7xc5 h5-h4 e2-e4 Rg8-g7+ Kf7-e6 Rg7-g2 Nc2-b4 Bb2-a3 Bc5-d4+ Kh8-g8 Nb4-d5 Rg2-d2 Bd4-c3 Rd2-c2 e4-e5 Rc2-f2 Bc3-d4 Rf2-f3 Bf5-e4 Rf3-f1 c4-c5 Ba3xc5 Bd4xc5 h4-h3 Ke6-d7 Rf1-e1 e5-e6 h3-h2
26/64+  00:33   417,487k  12,536k  +2.48  Ng6xh8
26/64-  00:34   432,903k  12,519k  +2.41  Ng6xh8 Kg7xh8
26/64+  00:35   447,089k  12,510k  +2.48  Ng6xh8
26/64-  00:36   461,339k  12,490k  +2.39  Ng6xh8 Kg7xh8
26/64+  00:37   472,746k  12,483k  +2.51  Ng6xh8
26/64  00:45   571,460k  12,454k  +2.58  Ng6xh8 Kg7xh8 Ke6-f7 Bf8-g7 Bh4xe7 Bg7-a1 Ne3-f5 Rg8-a8 Bh3-g2 Ra8-a2 Bg2-f3 h5-h4 Be7xh4 h6-h5 Kf7-e6 Ra2-a6+ Ke6-d5 Ba1-f6 Bh4-f2 h5-h4 Nf5xh4 Kh8-g7 Kd5xc5 Ra6-a1 Nh4-f5+ Kg7-g6 Nf5-e3 h7-h5 Kc5-d5 Ra1-a8 c4-c5 Ra8-d8+ Kd5-c4 Rd8-e8 Ne3-d5 Bf6-g5
26/64  00:45   571,558k  12,454k  +2.58  Ng6xh8 Kg7xh8 Ke6-f7 Bf8-g7 Bh4xe7 Bg7-a1 Ne3-f5 Rg8-a8 Bh3-g2 Ra8-a2 Bg2-f3 h5-h4 Be7xh4 h6-h5 Kf7-e6 Ra2-a6+ Ke6-d5 Ba1-f6 Bh4-f2 h5-h4 Nf5xh4 Kh8-g7 Kd5xc5 Ra6-a1 Nh4-f5+ Kg7-g6 Nf5-e3 h7-h5 Kc5-d5 Ra1-a8 c4-c5 Ra8-d8+ Kd5-c4 Rd8-e8 Ne3-d5 Bf6-g5
27/64+  00:52   656,477k  12,445k  +2.65  Ng6xh8
27/64-  00:58   729,432k  12,438k  +2.58  Ng6xh8 Kg7xh8
27/64-  00:59   738,641k  12,438k  +2.47  Ng6xh8 Kg7xh8
27/64+  01:00   753,907k  12,440k  +2.56  Ng6xh8
27/64+  01:14   923,326k  12,377k  +2.76  Ng6xh8
27/64  01:27   1,080,335k  12,354k  +2.75  Ng6xh8 Kg7xh8 Ke6-f7 Bf8-g7 Bh4xe7 Bg7-e5 Bh3-f5 Be5-d4 Ne3-c2 Bd4-e5 Be7xc5 Rg8-g2 Bc5-e3 Rg2xe2 c4-c5 Re2-g2 Kf7-e6 Be5-b2 Be3xh6 Rg2-g3 c5-c6 Rg3-c3 Ke6-d7 Rc3-c5 c6-c7 Bb2-e5 c7-c8Q+ Rc5xc8 Kd7xc8 Be5-g7 Bh6-g5 Bg7-f8 Kc8-d7 Kh8-g8 Nc2-d4 Bf8-c5 Nd4-e6 Bc5-a3
27/64  01:27   1,080,525k  12,353k  +2.75  Ng6xh8 Kg7xh8 Ke6-f7 Bf8-g7 Bh4xe7 Bg7-e5 Bh3-f5 Be5-d4 Ne3-c2 Bd4-e5 Be7xc5 Rg8-g2 Bc5-e3 Rg2xe2 c4-c5 Re2-g2 Kf7-e6 Be5-b2 Be3xh6 Rg2-g3 c5-c6 Rg3-c3 Ke6-d7 Rc3-c5 c6-c7 Bb2-e5 c7-c8Q+ Rc5xc8 Kd7xc8 Be5-g7 Bh6-g5 Bg7-f8 Kc8-d7 Kh8-g8 Nc2-d4 Bf8-c5 Nd4-e6 Bc5-a3
28/64+  01:38   1,210,611k  12,344k  +2.82  Ng6xh8
28/64-  01:41   1,253,230k  12,340k  +2.75  Ng6xh8 Kg7xh8
28/64+  01:41   1,258,066k  12,342k  +M6  Ne3-f5+
28/64  01:41   1,258,434k  12,342k  +M6  Ne3-f5+ Kg7xg6 Nf5-g7 Kg6xg7 e2-e4 Kg7-g6 Bh3-f5+ Kg6-g7 Bh4-g3 h5-h4 Bg3-e5+
Up Topic The Rybka Lounge / Test Positions / It seems to be easy

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