5 minutes per position on an I7-6*4 GHz, 6 pieces Syzygy, 8 GB HT.
3 runs, 3 columns in the tables.
Stockfish becomes very good in solving this set. It improved in some fields, mainly zugzwang and sacrifice to mate but it still not perfect.
Number of positions found at least one time : 116 on 161.
Position never found on the 3 runs : 45 on 161. But 8 of these 45 are flawed or suspicious.
This session helped to recheck most of the positions.
I recap all the positions next, with colors in a screenshot :
Yellow : become too easy (32 positions).
Red : bad test because of errors or duplicate solutions (9 positions).
Orange : still unclear (4 positions).
Green are special positions : shortest mate or evaluation to check (9 positions).
The whole EPD set is at the end.
Hopefully, it's the last time I use this bad quality set.
Code: Select all
Solution 1st run 2nd run 3rd run
1) Nc5-b3 Nc5-d7 Nc5-d7 Nc5-d7
2) Bb6-c7 Bb6-c7 * 1 Sec Bb6-c7 * 1 Sec Bb6-c7 * 1 Sec
3) Kc6-d5, Bc4-d5 Kc6-c5 Bc4-d5 * 0 Sec Bc4-b5
4) Nf3-h2, g2-g4 g2-g4 * 4 Sec g2-g4 * 1 Sec g2-g4 * 0 Sec
5) Rd6xf6 Rd6xf6 * 77 Sec Rd6xf6 * 146 Sec Rd6xf6 * 134 Sec
6) Bb1xh7 Bb1xh7 * 14 Sec Bb1xh7 * 16 Sec Bb1xh7 * 12 Sec
7) Rg1xg7 Rg1xg7 * 142 Sec Rg1xg7 * 280 Sec Rd1-d4
8) Nf3-d4 Nf3-d4 * 12 Sec Nf3-d4 * 18 Sec Nf3-d4 * 31 Sec
9) Bd3xh7 Bd3xh7 * 70 Sec Rf1-h1 Rf1-h1
10) Ng3-f5 Ng3-f5 * 60 Sec Ng3-f5 * 273 Sec Ng3-f5 * 109 Sec
11) .. Rb8xb3 Ra6-c6 Ra6-b6 Ra6-b6
12) g2-g4 g2-g4 * 0 Sec g2-g4 * 44 Sec g2-g4 * 3 Sec
13) e4-e5 e4-e5 * 249 Sec Ra1-d1 e4-e5 * 187 Sec
14) Ne2-f4 Be3-c5 Be3-a7 Be3-a7
15) Re3-e8 Nc4-d2 Nc4-d2 Nc4-d2
16) Be3xh6 Be3xh6 * 9 Sec Be3xh6 * 16 Sec Be3xh6 * 4 Sec
17) Rf1xf6 Rf1xf6 * 37 Sec Rf1xf6 * 6 Sec Rf1xf6 * 29 Sec
18) Rc8xc7 Rc8xc7 * 204 Sec Kg7-f7 Rc8xc7 * 135 Sec
19) e3-e4 a2-a3 a2-a3 a2-a3
20) Nf7-d6 Rg3-f3 Nf7-h6 Nf7-h6
21) f5-f6 c6-c7 f5-f6 * 226 Sec c6-c7
22) Rf2-f6 Rf2-f6 * 240 Sec Rf2-f6 * 165 Sec Bb1-c2
23) Re1-e6 Re1-e6 * 18 Sec Re1-e6 * 15 Sec Re1-e6 * 70 Sec
24) .. Rd6-f6 Rd6-d7 Rd6-d7 Rd6-d7
25) Kh3-g2 Kh3-g2 * 16 Sec Kh3-g2 * 36 Sec Kh3-g2 * 24 Sec
26) Na4xb6(?) Na4xb6 Na4xb6 Na4xb6
27) .. h5-h4 h5-h4 * 0 Sec h5-h4 * 0 Sec h5-h4 * 0 Sec
28) c4-c5 c4-c5 * 86 Sec c4-c5 * 42 Sec c4-c5 * 48 Sec
29) .. Nc5-e4 d5-d4 d5-d4 d5-d4
30) Ne5-g6 Ne5-d3 Ne5-g6 * 132 Sec Ne5-g6 * 116 Sec
31) Nd4-f5 Qg2-f3 g4-g5 Qg2-h3
32) Qc6-f3 Qc6-f3 * 16 Sec Qc6-f3 * 66 Sec Qc6-f3 * 79 Sec
33) e5-e6 Bb1-f5 Bb1-f5 Bb1-f5
34) Bd3xh7 Bd3xh7 * 46 Sec Bd3xh7 * 18 Sec Bd3xh7 * 17 Sec
35) Kh2-g3 Qf6-f4 Qf6-f4 Kh2-g3 * 19 Sec
36) Rf1-f5 Rf1-f5 * 15 Sec Rf1-f5 * 139 Sec Rf1-f5 * 12 Sec
37) Be3xc5 Be2-d3 Be3xc5 * 2 Sec Be3xc5 * 1 Sec
38) Bd5xf7 Bd5xf7 * 69 Sec Bd5xf7 * 76 Sec Bd5xf7 * 16 Sec
39) Bg5-f4 Bg5xf6 Re7xd7 Re7xd7
40) Bc2-a4 e5xf6 c3-c4 c3-c4
41) Qd8-a8 Qd8-a8 * 38 Sec Qd8-a8 * 155 Sec Qd8-a8 * 88 Sec
42) Nc2-d4 Kg2-f3 Kg2-f3 Kg2-f3
43) Ng5xf7 Bf5-c2 Bf5-h7 Bf5-c2
44) .. Bg7xd4 Bg7xd4 * 4 Sec Bg7xd4 * 12 Sec Bg7xd4 * 9 Sec
45) b2-b4 Bd4-g1 Bd4-g1 Bd4-g1
46) c2-c4 c2-c4 * 10 Sec c2-c4 * 18 Sec c2-c4 * 11 Sec
47) Rg3-g5 Rg3-g5 * 10 Sec Rg3-g5 * 63 Sec Rg3-g5 * 3 Sec
48) Qh3xh5 Qh3xh5 * 1 Sec Qh3xh5 * 2 Sec Qh3xh5 * 8 Sec
49) f3-f4 f3-f4 * 150 Sec Ke8-d7 Ke8-d7
50) Re8xe5 Re8-e7 Re8-c8 Re8-c8
51) .. e6-e5 Qe7-d8 Nd7-f6 Qe7-d8
52) Kb7-c8 a5-a6 a5-a6 a5-a6
53) f5xe6 f5xe6 * 2 Sec f5xe6 * 5 Sec f5xe6 * 0 Sec
54) Kh7-h6 Kh7-h6 * 3 Sec Kh7-h6 * 3 Sec Kh7-h6 * 6 Sec
55) Qd6xe5 Qd6-a3 Qd6-a3 Qd6-a3
56) Ne4xf6 Ne4xf6 * 2 Sec Ne4xf6 * 16 Sec Ne4xf6 * 12 Sec
57) Ng7-f5 Ng7-f5 * 8 Sec Ng7-f5 * 6 Sec Ng7-f5 * 22 Sec
58) .. Rc2xf2 Rc2xf2 * 14 Sec Rc2xf2 * 11 Sec Rc2xf2 * 29 Sec
59) Rd3xb3 Rd3xb3 * 37 Sec Rd3xb3 * 6 Sec Rd3xb3 * 20 Sec
60) c7-c8N Kf3-g2 c7-c8N * 251 Sec Kf3-g2
61) Qf5-e6 Qf5-e6 * 4 Sec Qf5-e6 * 33 Sec Qf5-e6 * 14 Sec
62) Rh5xg5 Rh5xg5 * 5 Sec g3-g4 Rh5xg5 * 5 Sec
63) .. Qd7-h3 Qd7-h3 * 106 Sec Qd7-h3 * 64 Sec Qd7-h3 * 75 Sec
64) .. Re2xd2 Re2xg2 Re2xg2 Re2xg2
65) e4-e5 e4-e5 * 280 Sec e4-e5 * 26 Sec e4-e5 * 38 Sec
66) Rc5xf5 Rc5xf5 * 0 Sec Rc5xf5 * 0 Sec Rc5xf5 * 0 Sec
67) Bd6-f8 Rg8-f8 Rg8-f8 Rg8-f8
68) Kg3-h2 Kg3-f3 Kg3-f3 Kg3-f3
69) Be3xc5 Re5-e8 Re5-e8 Kb7-b6
70) Bg2xe4 Bg2xe4 * 3 Sec Bg2xe4 * 21 Sec Bg2xe4 * 8 Sec
71) Kg2-f3 Rc2xd2 Kg2-f3 * 72 Sec Rc2xd2
72) Nc3-d5 Nc3-d5 * 22 Sec Nc3-d5 * 28 Sec Nc3-d5 * 19 Sec
73) b3-b4 b3-b4 * 13 Sec b3-b4 * 28 Sec b3-b4 * 3 Sec
74) Qd3xg6 h4-h5 h4-h5 h4-h5
75) .. Re3xf3 Re3xf3 * 60 Sec Rf6-h6 Re3xf3 * 90 Sec
76) Kh4-h5 Kh4-h5 * 102 Sec Qf2xf3 Qf2xf3
77) h5xg6 Nd6-b7 Nd6-b7 Nd6-b7
78) Kg1-h2 Kg1-h2 * 15 Sec Kg1-h2 * 3 Sec Kg1-h2 * 26 Sec
79) .. Rd7xd4 Rd7xd4 * 40 Sec Rd7xd4 * 9 Sec Rd7xd4 * 23 Sec
80) Bh3-f5 Bh3-f5 * 5 Sec Bh3-f5 * 27 Sec Bh3-f5 * 3 Sec
81) h2-h3 Bc3-e1 Bc3-e1 Bc3-e1
82) f5-f6 Kh5-g6 f5-f6
83) Be2-h5 Nh3xf2 Nh3xf2 Nh3xf2
84) Bf4-e3 Kh7-h6 Bf4-e3 * 0 Sec Bf4-h6
85) Bc4-e2 Bc4-e2 * 156 Sec Bc4-e2 * 98 Sec Bc4-e2 * 261 Sec
86) f7-f8Q f7-f8Q * 41 Sec f7-f8Q * 50 Sec f7-f8Q * 0 Sec
87) Ng4-f6 Ng4xe3 Ng4xe3 d7-d8Q
88) Rf4-g4 Rf4-g4 * 6 Sec Rf4-g4 * 7 Sec Rf4-g4 * 24 Sec
89) Nf4-d3 Nf4-d3 * 202 Sec h4xg5 h4xg5
90) .. Rc5-b5(?) Rc5-c4 * 294 Sec Rc5-b5 Rc5-c4 * 50 Sec
91) h4-h5 e5-e6 e5-e6 h4-h5 * 277 Sec
92) c3-c4 c3-c4 * 73 Sec c3-c4 * 28 Sec c3-c4 * 41 Sec
93) Na5-b3 Na5-b3 * 50 Sec Nd4xc2 Na5-b3 * 170 Sec
94) Be3-c1 Be3-c1 * 0 Sec Be3-c1 * 1 Sec Be3-c1 * 0 Sec
95) .. g6-g5, d5-d4 g6-g5 * 3 Sec g6-g5 * 3 Sec g6-g5 * 3 Sec
96) .. Bf5-h3 Bf5-h3 * 65 Sec Bf5-h3 * 50 Sec Bf5-h3 * 18 Sec
97) .. Kf6-g7 Kf6-e5 Kf6-e5
98) Rf1-b1 Rf1-b1 * 0 Sec Rf1-b1 * 0 Sec Rf1-c1
99) Bf5-g4 Bf5-g4 * 0 Sec Bf5-g4 * 0 Sec Bf5-g4 * 0 Sec
100) g3-g4 g3-g4 * 4 Sec Bf2-d4 Bf2-d4
101) Nd4-c6 g7-g8Q g7-g8Q g7-g8Q
102) Re5xf5 Re2-d2 Re5xf5 * 3 Sec Re5xf5 * 15 Sec
103) f2-f4 Na8-c7 Na8-c7 Na8-c7
104) .. d4-d3 d4-d3 * 35 Sec d4-d3 * 62 Sec d4-d3 * 22 Sec
105) .. d3-d2 d3-d2 * 0 Sec Qd4-e3 d3-d2 * 0 Sec
106) Bh5-f3 Bh5-f3 * 91 Sec Bh5-f3 * 119 Sec Bh5-f3 * 184 Sec
107) Rh1-h6 Rh1-h6 * 168 Sec Bf7-e8 Rh1-h6 * 133 Sec
108) Bd8-c7 g6xh7 g6xh7 Bd8-c7 * 257 Sec
109) Qh4-d4 Qh4xe7 Qh4xe7 Qh4xe7
110) .. Ne8-c7 Ne8-c7 * 105 Sec Ne8-c7 * 53 Sec Ne8-c7 * 108 Sec
111) c4-c5 b4-b5 c4-c5 * 1 Sec b4-b5
112) Bf1-e2 Bf1-e2 * 163 Sec g2-g4 Bf1-e2 * 128 Sec
113) .. Ke8-f8 Ke8-f8 Ke8-f8
114) Bg5-f6 Bg5-f6 * 2 Sec Bg5-f6 * 185 Sec Bg5-f6 * 12 Sec
115) Be4-g6 Be4-g6 * 59 Sec Be4-g6 * 38 Sec Be4-d3
116) Bd3xh7 Bd3xh7 * 140 Sec Bd3xh7 * 4 Sec Bd3xh7 * 16 Sec
117) Bd4-f6 Qh5-h6 Qh5-h6 Qh5-h6
118) Bd3-g6 Nc3-b5 Bd3-g6 * 213 Sec Bd3-g6 * 77 Sec
119) Re1-e5 c3-c4 c3-c4 c3-c4
120) Kg1-f2 Kg1-f2 * 151 Sec Kg1-f2 * 129 Sec Kg1-f2 * 110 Sec
121) .. Nb6-c4 a7-a5 a7-a5 a7-a5
122) Qe1-h4 Qe1-h4 * 1 Sec Qe1-h4 * 19 Sec Qe1-h4 * 5 Sec
123) Ne4-g5 Ne4-g5 * 92 Sec Ne4-g5 * 68 Sec Ne4-g5 * 198 Sec
124) Bd3xh7 Bd3xh7 * 35 Sec Bd3xh7 * 10 Sec Bd3xh7 * 19 Sec
125) .. Bg7-h6 Qd8-e8 Qd8-e8 Qd8-e8
126) c2-c4 Ng1-f3 Ng1-f3 Ng1-f3
127) Rh1xh7 Rh1xh7 * 35 Sec Rh1xh7 * 39 Sec Rh1xh7 * 37 Sec
128) Qe2xe8 Qe2xe8 * 252 Sec Qe2xe8 * 174 Sec Qe2xe8 * 106 Sec
129) Nd5-f6 Nd5-f6 * 255 Sec h2-h3 Nd5-f6 * 289 Sec
130) f5-f6 Kg1-h1 Kg1-h1 f5-f6 * 223 Sec
131) Qf3-f6 b3xa4 b3xa4 b3xa4
132) Qf3-f6 Qf3-f6 * 69 Sec Qf3-f6 * 71 Sec Qf3-f6 * 51 Sec
133) Qg5-h6 Qg5-h6 * 87 Sec Qg5-h6 * 16 Sec Qg5-h6 * 13 Sec
134) Nf3xg5 Nf3xg5 * 1 Sec Nf3xg5 * 6 Sec Nf3xg5 * 9 Sec
135) Nd4-c6 Nd4-c6 * 26 Sec Nd4-c6 * 11 Sec Nd4-c6 * 77 Sec
136) Bc1xh6 Bd3xf5 Bd3xf5 Bd3xf5
137) Nf3-h4 Qd1xe1 Qd1xe1 Qd1xe1
138) Bg7xh6 Bg7xh6 * 9 Sec Bg7xh6 * 3 Sec Bg7xh6 * 7 Sec
139) .. Kg8-g7 e4xd3 Kg8-g7 * 42 Sec Kg8-g7 * 132 Sec
140) Rf3-f6 Rf3-f6 * 26 Sec Rf3-f6 * 30 Sec Rf3-f6 * 23 Sec
141) Bd3xh7 Bd3xh7 * 9 Sec Bd3xh7 * 6 Sec Bd3xh7 * 45 Sec
142) Rd3-h3 Rd3-h3 * 42 Sec Rd3-h3 * 49 Sec Rd3-h3 * 16 Sec
143) Rd2-d1 Rd2-d1 * 1 Sec Rd2-d1 * 1 Sec Rd2-d1 * 2 Sec
144) Rd6xf6 Rd6xf6 * 4 Sec Rd6xf6 * 0 Sec b2-b3
145) Qe2-h5 Nf5xe7 Nf5xe7 Nf5xe7
146) Bd3xh7 Bd3xh7 * 85 Sec Bd3xh7 * 178 Sec Bd3xh7 * 81 Sec
147) Bg5-f6 Bg5-f6 * 5 Sec Bg5-f6 * 11 Sec Bg5-f6 * 7 Sec
148) .. c3xb2 c3xb2 * 127 Sec c3xb2 * 269 Sec c3xb2 * 24 Sec
149) .. e4-e3 e4-e3 * 147 Sec e4-e3 * 145 Sec e4-e3 * 21 Sec
150) .. Rh6xh2 a7-a6 a7-a6 a7-a6
151) Qd2-f4 Qd2-f4 * 10 Sec Qd2-f4 * 15 Sec Qd2-f4 * 13 Sec
152) Nc3-d5 Nc3-d5 * 137 Sec Qd2-e3 Qd2-e3
153) .. Bd7-h3 Bd7-h3 * 4 Sec Bd7-h3 * 12 Sec Bd7-h3 * 160 Sec
154) .. Qb2-c2 Qb2-c2 * 98 Sec Qb2-c2 * 137 Sec Qb2-c2 * 136 Sec
155) g2-g4 g2-g4 * 0 Sec g2-g4 * 0 Sec g2-g4 * 0 Sec
156) Bd3xh7 Ra1-c1 Bd3xh7 * 110 Sec Bd3xh7 * 41 Sec
157) e5-e6 e5-e6 * 55 Sec Ng1-f3 e5-e6 * 119 Sec
158) h3-h4 h3-h4 * 0 Sec h3-h4 * 8 Sec h3-h4 * 0 Sec
159) g2-g4 g2-g4 * 16 Sec g2-g4 * 83 Sec g2-g4 * 24 Sec
160) Bd3xh7 Bd3xh7 * 5 Sec Bd3xh7 * 6 Sec Bd3xh7 * 16 Sec
161) Qe2-h5 Qe2-h5 * 17 Sec Qe2-h5 * 96 Sec Qe2-h5 * 68 Sec
Code: Select all
1b6/2p5/1kB5/1PN5/8/3K4/8/q7 w - - bm Nb3;
1k1n4/1p1b1p2/1Bp1pPp1/1PP1P3/8/6P1/8/1K6 w - - id ?; bm Bc7+;
1k3b1q/pP2p1p1/P1K1P1Pp/7P/2B5/8/8/8 w - - bm Kd5 Bd5; c1 "diff=8";
1nrqr3/1b4bk/pp3pp1/3pPp1p/P1pP1P1P/2P1BN2/1PB2QP1/R4RK1 w - - id ?; bm Nh2 g4;
1q1r3k/3P1pp1/ppBR1n1p/4Q2P/P4P2/8/5PK1/8 w - - bm Rxf6; c1 "diff=6";
1qrrbbk1/1p1nnppp/p3p3/4P3/2P5/1PN1N3/PB2Q1PP/1B2RR1K w - - bm Bxh7+; c1 "diff=5";
1r1rb1k1/5ppp/4p3/1p1p3P/1q2P2Q/pN3P2/PPP4P/1K1R2R1 w - - bm Rxg7; c1 "diff=6";
1r3rk1/3b1p1p/pp1p1p1Q/n1q1p3/2P1P3/P1PB1N2/6PP/1R3RK1 w - - bm Nd4; c1 "diff=6";
1r3rk1/3bbppp/1qn2P2/p2pP1P1/3P4/2PB1N2/6K1/qNBQ1R2 w - - bm Bxh7+; id "arasan19.96"; c0 "nick-Fritz 11, playchess.com 2011";
1r3rk1/5p1p/p2pb1p1/3Np1P1/2pRPR2/qP2Q1N1/P1PK3P/8 w - - bm Nf5; c1 "diff=5";
1r6/4k3/r2p2p1/2pR1p1p/2P1pP1P/pPK1P1P1/P7/1B6 b - - bm Rxb3; c1 "diff=9";
1rb1nrk1/1p1qp2p/p1np1p1Q/3NPp2/2P5/3B1N1P/P2B2P1/R6K w - - bm g4; c1 "diff=6";
1rb1r1k1/2qn1pbp/pp1p2p1/2nP4/P1p1PP2/2N1BQNP/1PB3P1/R4R1K w - - bm e5;
1rb2r1k/3p1pp1/p3p2p/1p2P3/4q3/1N2B1R1/PPP1N1P1/2KR1B2 w - - id ?; bm Nf4;
1rb4k/p5np/3p1rp1/1ppB4/2N2P2/1P2R1P1/P1P4P/4R1K1 w - - bm Re8; c1 "diff=5";
1rbr2k1/4q1p1/p2bp2p/8/R6P/3QB1P1/4PPB1/2R3K1 w - - bm Bxh6;
1rr1b1k1/1pq1bp2/p2p1np1/4p3/P2BP3/2NB2Q1/1PP3PP/4RR1K w - - bm Rxf6; id "arasan19.134"; c0 "Glek-Lingnau, Dortmund op-A 1992";
2R5/k1p1p1K1/P1p1Pp2/5P2/7P/pB6/2p5/2r5 w - - bm Rxc7; c1 "diff=5";
2b1Bbk1/5ppp/p3p3/8/1r3P2/4P3/P4P1P/3Q2K1 w - - bm e4; c1 "diff=5";
2b1r3/r2ppN2/8/1p1p1k2/pP1P4/2P3R1/PP3PP1/2K5 w - - bm Nd6; c1 "diff=10";
2b1rk2/5p2/p1P5/2p2P2/2p5/7B/P7/2KR4 w - - bm f6; id "arasan19.41"; c0 "study by Smyslov";
2b2r2/2r2pbk/4n1pp/pp1pP3/2pP3q/P1P1B2P/1P1QNRPK/1B3R2 w - - id ?; bm Rf6;
2bq1b2/1p3k2/1r1p1p1p/pNpP1PpP/P1P3P1/6B1/1P5Q/2K1R3 w - - bm Re6;
2k2Br1/p6b/Pq1r4/1p2p1b1/1Ppp2p1/Q1P3N1/5RPP/R3N1K1 b - - bm Rf6;
2k5/1pP4p/3p3P/3p1N2/1P3P2/7K/5b2/8 w - - bm Kg2; c1 "diff=4";
2k5/2p5/1q1p4/pPpPp1pp/N1P1Pp2/P4PbP/KQ4P1/8 w - - am Nxb6+?; c1 "diff=10";
2k5/8/1p1p4/pPpPp2p/2P1Pp2/P4PbP/K2Q4/8 b - - bm h4; c1 "diff=7";
2k5/p7/Pp1p1b2/1P1P1p2/2P2P1p/3K3P/5B2/8 w - - bm c5; c1 "diff=8";
2q1r1k1/b1r2pp1/p4np1/2np4/1Q6/4PP1P/P1B1N1P1/1RBR1K2 b - - id ?; bm Nce4;
2q2r1k/p1p1b1pp/br1p1n2/2p1N1BP/Q1P1P3/8/PP1N1PP1/2KR3R w - - id ?; bm Ng6+;
2r1k2r/4qpp1/p3p2p/1pn1P3/3N2P1/P7/1PP3QP/1K1R2R1 w k - id ?; bm Nf5;
2r1r1k1/2P2bp1/p1Q2pq1/2R3b1/1P6/4p1Bp/4B2P/3R3K w - - id ?; bm Qf3;
2r1r1k1/4bppp/1q4n1/3pP3/p1pP4/PnR2NBP/1P4P1/1B1QR2K w - - bm e6; c1 "diff=8";
2r2rk1/1b3ppp/pn2p3/2qpP3/1p1Q1PP1/3B2R1/PPP1N2P/1K1R4 w - - bm Bxh7+;
2r2rk1/1bpR1p2/1pq1pQp1/p3P2p/P1PR3P/5N2/2P2PPK/8 w - - bm Kg3; c1 "diff=5";
2r2rk1/2q2p1p/p1p1nPpQ/3p4/4p1B1/8/PPP3PP/R4R1K w - - bm Rf5; c0 "mate in 6"; c1 "diff=4";
2r2rk1/2qp1p1p/p1p2Pp1/2b1p3/4n3/4B3/PPP1B1PP/R3QR1K w - - bm Bxc5;
2r4r/3n1pk1/pq1p1bp1/3B4/1p2P1N1/7P/PP1Q1PK1/3RR3 w - - bm Bxf7; c1 "diff=6";
2r5/prkpR1p1/2p1ppK1/P1p1N1B1/P1P1P3/8/8/8 w - - bm Bf4; c1 "diff=9";
3B4/1r2p3/r2p1p2/bkp1P1p1/1p1P1PPp/p1P1K2P/PPB5/8 w - - bm Ba4+; c1 "diff=5";
3Q4/3p4/P2p4/N2b4/8/4P3/5p1p/5Kbk w - - bm Qa8; c1 "diff=6";
3k4/2pq3p/pp5R/4P3/P6P/2PN4/1PN3K1/8 w - - bm Nd4; c1 "diff=10";
3k4/4pp2/n2n4/5BN1/3N4/b7/4K3/8 w - - bm Nxf7+; c1 "diff=8";
3q3r/4kpb1/Q1ppp3/3b3p/PP1P1np1/6P1/5P1P/R1R1NBK1 b - - bm Bxd4;
3q4/4k3/1p1b1p1r/p2Q4/3B1p1p/7P/1P4P1/3R3K w - - bm b4; id "arasan19.120"; c0 "Stockfish 021113-Naum 4.6, nTCEC - Stage 4 - Season 2 2013";
3r2k1/3N1ppp/p2Pp3/8/5q2/8/1PP3R1/1K1R1B2 w - - bm c4; c1 "diff=7";
3r2rk/5pp1/p2p1q1p/n1pPpP2/PpP1Q2P/1P3RR1/2B2PP1/6K1 w - - bm Rg5;
3rr1k1/pb3p1p/qp2p1pB/2p4n/3pN3/2P2B1Q/PP5P/R2R3K w - - bm Qxh5; c1 "diff=6";
4K1k1/8/1p5p/1Pp3b1/8/1P3P2/P1B2P2/8 w - - bm f4; id "arasan19.189"; c0 "Šachová skladba 2011-12, 1st Prize";
4R3/P7/2bB2p1/r3pk2/2p2p1P/2P2P1K/6P1/8 w - - bm Rxe5+; c1 "diff=7";
4bbk1/3nq2r/pr2p3/Np1p1p1p/1PpP1Pp1/2P1P1P1/PQ1NB1PR/2K4R b - - bm e5; c1 "diff=8";
4k1br/1K1p1n1r/2p2pN1/P2p1N2/2P3pP/5B2/P2P4/8 w - - id ?; bm Kc8;
4kb1r/2q2ppb/p2pp2p/5P2/NrPB2P1/1P3Q2/1K1R3P/7R w k - id ?; bm fxe6;
4kr2/5p1K/3p1Q2/1p4P1/4P3/1PP5/7b/8 w - - bm Kh6; c1 "diff=9";
4q1kr/p6p/1prQPppB/4n3/4P3/2P5/PP2B2P/R5K1 w - - bm Qxe5; c1 "diff=10";
4r2r/pppkq1pp/2n1pn2/4p1B1/4N2Q/8/PPP3PP/4RRK1 w - - bm Nxf6+;
5N2/6N1/q2k3p/8/6p1/4K1PP/B5P1/8 w - - bm Nf5;
5k2/4bp2/2B3p1/1P4p1/3R4/3P2PP/2r2PK1/8 b - - bm Rxf2+; c0 "Uhlmann-Malich,Berlin 1968"; fmvn 53; hmvc 0; id "Nightmare Nr.021"; c1 "diff=8";
5kN1/3p1q2/5P2/5PP1/2pK4/1p1R4/1P6/8 w - - bm Rxb3; c1 "diff=6";
5nr1/2Pp2pk/3Pp1p1/4P1P1/6P1/5K2/8/7n w - - id ?; bm c8N;
5rk1/2p2Rpq/p2p2n1/2pPpQPp/4P2P/3P2N1/PP6/6K1 w - - bm Qe6; c1 "diff=7";
5rk1/8/pqPp1r1p/1p1Pp1bR/4B3/5PP1/PP2Q1K1/R7 w - - bm Rxg5+; c0 "sedarpi-noamgmi, www.chesspresso.net 2014";
5rk1/p2qr1b1/1Pn3pp/2pn4/2Np1p2/1N1P2P1/1P1BPP1P/R2QR1K1 b - - bm Qh3; c1 "diff=5";
5rk1/pp3p1p/7b/2pR4/8/2P4P/P1PNr1P1/2K4R b - - bm Rxd2;
5rr1/1p1bk3/p3pp2/8/3PP1pp/1PN1P3/1P3RPP/5RK1 w - - bm e5; c0 "MD vs JL, Chess Thinkers Forum 2015";
6Nk/pp2Np1p/2p2Pp1/2R2bP1/7K/P7/1q1n1Q2/5n2 w - - bm Rxf5; c1 "diff=9";
6R1/8/2pB3k/2P4p/5p1q/5P2/4P1K1/8 w - - bm Bf8+; c1 "diff=8";
6b1/5p2/1p3Bp1/1P3pP1/5P2/pp1B2K1/pr4P1/k7 w - - bm Kh2; c1 "diff=10";
6br/1KNp1n1r/2p2p2/P1ppRP2/1kP3pP/3PBB2/PN1P4/8 w - - bm Bxc5+;
6k1/1pp2p2/3p4/p2P1Pp1/2P1n1Pp/4B1nP/PP4B1/4K3 w - - bm Bxe4; c1 "diff=8";
6k1/p7/8/4B3/Pp3p1P/qP5P/P1Rb2K1/8 w - - bm Kf3; c1 "diff=10";
6k1/ppn2p2/8/2P2P1p/1P2K3/2N5/P7/8 w - - bm Nd5; c1 "diff=7";
6qk/p4r1p/1n1p2pP/2p1p1Q1/2PnB1R1/1P6/P4PP1/5RK1 w - - bm b4; c1 "diff=8";
6r1/3q1npk/2b1pbnp/Rp1p4/1N1P3P/2PQ1pP1/1K3B2/5B1R w - - bm Qxg6; c1 "diff=7";
7k/3q1pp1/1p3r2/p1bP4/P1P2p2/1P2rNpP/2Q3P1/4RR1K b - - bm Rxf3; id "arasan19.122"; c0 "Darkraider (Stockfish 2.1.1JA)-Pastorale(Houdini 1.5a), playchess.com 2011";
7k/pp2Np1p/2p2P1N/5pP1/7K/P4n2/1q3Q2/5n2 w - - bm Kh5; c1 "diff=10";
7q/b1p5/1p1Npkb1/pPP2ppP/P1P5/3B2P1/5P1R/K3R3 w - - bm hxg6; c1 "diff=10";
7r/pp3pk1/3p1N2/5PBp/1Pq1P3/2P4P/rP3RP1/4R1K1 w - - bm Kh2; c1 "diff=9";
8/1p1r2R1/p5p1/5bp1/2PB1k2/1PK5/P7/8 b - - bm Rxd4; c1 "diff=8";
8/1p2K2k/8/2p3rr/8/PPR4B/2P3P1/8 w - - bm Bf5+; c1 "diff=8";
8/1p2b3/6k1/5p2/p2NbP1p/P1B1P1p1/1P5P/6K1 w - - bm h3; c0 "fortress From Smirin-HIARCS"; c1 "diff=10";
8/1p6/1p6/kPp2P1K/2P5/N1Pp4/q2P4/1N6 w - -; c0 "eval = draw"; c1 "diff=9";
8/2N4r/1p3pkp/8/5K1p/2P4N/P3Bn2/8 w - - id ?; bm Bh5;
8/2b2k1K/1pPp1p2/1P1P1P2/5B2/8/8/8 w - - bm Be3; c1 "diff=2"; c0 "the point to play Bxf6 on move 3";
8/2p1q3/p3P3/2P4p/1PBP2kP/2N3P1/7K/8 w - - bm Be2; c1 "diff=7";
8/2pPpP2/1P1qk1p1/1p4P1/1P4p1/1p1QK1P1/2PpPp2/8 w - - bm f8=Q; c1 "diff=7";
8/3P3k/n2K3p/2p3n1/1b4N1/2p1p1P1/8/3B4 w - - bm Nf6+; c0 "study by Van Breukelen";
8/4K2p/6pr/5pk1/1pB2R2/p4PP1/8/8 w - - bm Rg4; c1 "diff=7";
8/4nk2/1p3p2/1r1p2pp/1P1R1N1P/6P1/3KPP2/8 w - - bm Nd3; id "arasan19.116"; c0 "Grandelius-Raznikov, EU Youth Chess Ch B18, Albena 2011";
8/4nk2/1p3p2/2rp2pp/1P1R1N1P/6P1/3KPP2/8 b - - am Rb5?; c1 "diff=7";
8/5p2/N1p3p1/3pP1P1/7P/2kP4/Pb6/7K w - - bm h5; c1 "diff=7";
8/6k1/2p2qp1/1p1n1p2/r2P4/p1P3P1/3Q1PK1/R6R w - - bm c4;
8/6pp/1K6/N5P1/3N4/8/npn1P3/k7 w - - bm Nab3+; c0 "Lommer 1963"; fmvn 1; hmvc 0; id "Nightmare Nr.020"; c1 "diff=6";
8/8/2p1p2b/1pPp1p1k/pP1P1P2/P2PB2K/8/8 w - - bm Bc1; c1 "diff=9";
8/8/4b1p1/2Bp3p/5P1P/1pK1Pk2/8/8 b - - bm g5 d4+; id "(Speelman_EP) (27 page 23)"; c1 "diff=8";
8/8/4kpp1/3p1b2/p6P/2B5/6P1/6K1 b - - bm Bh3; c1 "diff=7";
8/8/5k2/8/2B4p/5RbP/5pP1/7K b - -; c0 "eval = draw"; c1 "diff=7";
8/8/8/2pK3p/8/5N2/1P4pq/5Rbk w - - bm Rb1; c1 "diff=8";
8/8/8/5Bp1/7k/8/4pPKP/8 w - - bm Bg4; eval = draw;
8/P5k1/P5p1/5pKp/4bP1P/6P1/5B2/8 w - - bm g4;
8/bp4Pk/4KB2/R6p/2pNp1P1/p7/3p1Pnq/2r5 w - - id ?; bm Nc6;
8/p4pk1/r1p1p1p1/P1PpRnPp/1P3P2/2P5/4RK2/8 w - - bm Rxf5;
N7/8/2KQ2rp/6k1/3p3p/2p4P/4PP2/5N2 w - - bm f4+; c1 "diff=8";
b3r3/q2B2k1/3Q2p1/1p5p/3pP3/5P2/1p4PP/5RK1 b - - bm d3+; c1 "diff=6";
k5r1/5p1p/p1b1B3/2N1n1r1/1P1q4/3p1P1Q/PP3RPP/5R1K b - - bm d2; c1 "diff=7";
k7/p1pR4/1p3p2/2P2rpB/PbP4p/2N1p2p/KP6/8 w - - bm Bf3; c1 "diff=7";
kr1b4/p1p2B2/2p5/2p1p3/KpP1P3/1P4N1/8/7R w - - id ?; bm Rh6;
n1QBq1k1/5p1p/5KP1/p7/8/8/8/8 w - - bm Bc7; c1 "diff=9";
q1r5/k3ppp1/2R5/PP1KP2r/2p4Q/2p1p3/5pP1/3R4 w - - id ?; bm Qd4+;
q3nrk1/4bppp/3p4/r3nPP1/4P2P/NpQ1B3/1P4B1/1K1R3R b - - bm Nc7; c0 "Karjakin-Anand Wijk-aan-zee 2006"; c1 "diff=7";
q7/b1p5/kp1p4/p2PN3/PPP5/1K6/8/5B2 w - - bm c5+; c1 "diff=7";
r1b1k1r1/1p2np1p/p1n1pQp1/3p4/3NPP2/P2RB3/2PK2PP/q4B1R w q d6 bm Be2; c1 "diff=6";
r1b1k3/1p1p1pp1/1p1P3p/pP6/P7/8/5PPP/4R1K1 b q -; c0 "eval +/-"; c1 "diff=6";
r1b1r1k1/p2q1ppp/np2n3/3p1NBQ/8/6PB/P4P1P/1R2R1K1 w - - bm Bf6; c1 "diff=7";
r1b1r2k/pp1n1pp1/1qpb3p/8/3PB2B/5N2/PPQ2PPP/R3R1K1 w - - bm Bg6; c1 "diff=9";
r1b2rk1/1pq2ppp/p1p1p3/2n1P3/2N2P2/3B4/PPP3PP/R2Q1RK1 w - - bm Bxh7; c1 "diff=7";
r1b2rk1/2q1bppp/p2pp3/2n3PQ/1p1BP3/1BN5/PPP2P1P/2KR2R1 w - - bm Bf6; c1 "diff=7";
r1b3k1/ppp1q1pp/2n1p3/3pP2P/8/2NB2Q1/PPP3P1/2K2R2 w - - bm Bg6; c0 "Hector-So, 19th Sigeman & Co., Malmo 2011";
r1b3kr/pp1n2Bp/2pb2q1/3p3N/3P4/2P2Q2/P1P3PP/4RRK1 w - - bm Re5; id "arasan19.124"; c0 "Orcrist-Crafty, ICC 2011";
r1b3r1/5p1k/p1n2P1p/P1qpp1P1/1p1p4/3P2Q1/BPPB2P1/R4RK1 w - - bm Kf2; id "arasan19.179"; c0 "Efremov-Fischer, Danube/4 ICCF 2012";
r1bq1rk1/p4p1p/1np3p1/3p2Pn/1p2PP2/1PbQB3/P1P1BN1P/2KR2NR b - - bm Nc4; c1 "diff=6";
r1bq1rk1/pp1n1pp1/4pn1p/2p3B1/3P4/P1PB1N2/2P3PP/R3QRK1 w - - bm Qh4; c1 "diff=6";
r1bq1rk1/pp2b2p/2p1pppQ/8/1n1PN2P/3B1N2/PPP2PP1/2KR3R w - - bm Neg5;
r1bq1rk1/pp2bppp/1n2p3/3pP3/8/2RBBN2/PP2QPPP/2R3K1 w - - bm Bxh7+; c1 "diff=7";
r1bq1rk1/ppp3b1/3p1nn1/P1PPp1Bp/1P2P3/1QNN1Pp1/4B1P1/R4RK1 b - - bm Bh6; c1 "diff=8";
r1bqkb1r/ppp3pp/n3pn2/1N1p1p2/3P1B2/4P3/PPP2PPP/R2QKBNR w KQkq - bm c4;
r1bqn1nk/ppp4p/3p4/3Pp1r1/2P1Pp2/2NB1P2/PP2N3/2K1Q1RR w - - bm Rxh7; c1 "diff=5";
r1bqr1k1/3n1ppp/p2p1b2/3N1PP1/1p1B1P2/1P6/1PP1Q2P/2KR2R1 w - - bm Qxe8+;
r1q1rbk1/2pp1ppp/p1b5/1p1NP3/3Q4/3R2B1/PPP2PPP/5RK1 w - - bm Nf6; c1 "diff=8";
r1q2rk1/ppp1bp2/6p1/3pNPn1/7p/2PP3P/P6B/1R1Q1RK1 w - - bm f6; c1 "diff=6";
r2q1r2/1b2bpkp/n3p1p1/2ppP1P1/p6R/1PN1BQR1/NPP2P1P/4K3 w - - bm Qf6+;
r2q1r2/1b2bpkp/p3p1p1/2ppP1P1/7R/1PN1BQR1/1PP2P1P/4K3 w - - bm Qf6+; id "arasan19.132"; c0 "Asauskas-Malisauskas, Vilnius 2004";
r2q1rk1/ppp2p2/3p1np1/4pNQ1/4P1pP/1PPP4/1P3P2/R3K1R1 w Q - bm Qh6; c1 "diff=8";
r2qk2r/ppp1b1pp/2n1p3/3pP1n1/3P2b1/2PB1NN1/PP4PP/R1BQK2R w KQkq - bm Nxg5; c1 "diff=8";
r2qkb1r/3bpppp/p4nn1/3P4/1p1N4/1QN3B1/PP3PPP/R3KB1R w KQkq - bm Nc6; c1 "diff=6";
r2qnrk1/p4pp1/1p2b2p/2p1Pp2/2P5/PnPB1QN1/6PP/R1B2RK1 w - - bm Bxh6; c0 "Domangala-Leszek, Super Puchar cr 2003";
r2qrbk1/1b3p2/3p2pB/1p1P1N2/1np1P3/5NRP/1P3PP1/1B1Qn1K1 w - - id ?; bm N3h4;
r3nrk1/5pB1/p2q1P1b/1p2P3/3p4/3B1N2/PPP5/5R1K w - - bm Bxh6;
r3r1k1/pp1q1p2/2p2npb/PPPp4/3Pp3/2NNPpP1/1R1B1P1K/3Q3R b - - bm Kg7;
r3r2k/1pq2pp1/4b2p/3pP3/p1nB3P/P2B1RQ1/1PP3P1/3R3K w - - bm Rf6;
r3rbk1/ppq2ppp/2b1pB2/8/6Q1/1P1B3P/P1P2PP1/R2R2K1 w - - bm Bxh7+; c1 "diff=7";
r4r1k/1p1n1ppp/1qb1p3/2b1P3/2B3Q1/p1NR4/PPP3PP/1KB1R3 w - - bm Rh3; c1 "diff=7";
r4r1k/1p4qp/b1pNRbp1/2P5/3p1P1P/PQ4P1/3R2BK/8 w - - bm Rd1;
r4r1k/6qp/3R1bb1/pNp2p2/PnB1pP2/4B2P/1P3Q1K/6R1 w - - bm Rxf6;
r4rk1/1bq1bppp/p1npp3/2nB1NP1/1p2P3/2N1B3/PPP1QP1P/2KR2R1 w - - bm Qh5;
r4rk1/4bppp/bq2p3/npnpP3/p2B1P2/P1PB1N2/1P2QNPP/R4RK1 w - - id ?; bm Bxh7+;
r4rk1/p4ppp/qp2p3/b5B1/n1R5/5N2/PP2QPPP/1R4K1 w - - bm Bf6; c1 "diff=7";
r5k1/1b2bppp/1n2p3/1P6/2qPP3/r1p2N2/1R2QPPP/1BR1B1K1 b - - bm cxb2; c1 "diff=6";
r5k1/6b1/2Nq4/2pP1p2/p1P1pPr1/Pp6/3R2PQ/1K3R2 b - - bm e3; c1 "diff=9";
r5k1/p1pb2bp/3p3r/P1pPp1p1/2B1Pq2/1R2QPp1/1P4PP/5RBK b - - bm Rxh2+;
r5n1/p1p1q2k/4b2p/3pB3/3PP1pP/8/PPPQ2P1/5RK1 w - - bm Qf4; c1 "diff=7";
r5rk/1bq1bpp1/1p1ppn1p/pP5P/2P1P3/P1N2P2/1B1Q1P2/1K1R1BR1 w - - id ?; bm Nd5;
r6k/N1Rb2bp/p2p1nr1/3Pp2q/1P2Pp1P/5N2/P3QBP1/4R1K1 b - - bm Bh3; id "arasan19.158"; c0 "Persson-Gerhardt, Simon Webb mem email 2007";
r6r/4k3/p2bP2p/2n2PP1/2BQn2P/1pP1p3/1q1BK3/3R3R b - - bm Qc2; c1 "diff=8";
rn1q1rk1/p2p1pb1/bp3np1/2pP2Bp/7P/P1N2N2/1PQ1PPP1/R3KB1R w KQ - bm g4; c0 "Gupta-Fier, Reykjavik Open 2015";
rn1qr1k1/1p2bppp/p3p3/3pP3/P2P1B2/2RB1Q1P/1P3PP1/R5K1 w - - bm Bxh7+; c1 "diff=7";
rn2kbnr/pp2ppp1/2p5/3pP1Bp/3P3P/3Q4/PqP2PP1/RN2K1NR w KQkq - id ?; bm e6;
rnbRrk2/2p5/1p2PB1p/pP4p1/8/P3R2P/2P2P2/6K1 w - - bm h4; c1 "diff=7";
r3r1k1/1bppq2p/1p1n1bp1/3P1p2/p4N1P/P1PB1P2/1P1Q1BP1/1K1R3R w - - bm g4;
r1bq1rk1/pp2bppp/1n2p3/3pP3/8/2RBBN2/PP2QPPP/2R3K1 w - - 0 1 bm Bxh7;
4rrk1/p1q1bpp1/b1n1p2p/1pppP1N1/n4B1P/3P2P1/PPP1QPBN/R3R1K1 w - - 0 1 bm Qh5;