Just by chance, I arrived to this problem composed by M.J. Campbell:
[d]8/1p6/1P1p4/1K1p2B1/P2P4/6pp/1P6/5k2 w - -
(The text below the chessboard can be translated as 'White to play and draw').
This position is very easy for engines, although I want to note a common pattern: engines give total losing evals for white (such as -7) and suddenly there is an explosion of 0 evals with the correct move Bd2. I just wanted to share it.
Komodo is the slowest engine (by far) among the several ones I tried. In particular, Komodo 3 was blind after more than 70 million nodes:
Once Bd2 was found by Komodo 3, then the explosion of 0 evals comes... the same than the rest of engines. Depending on the engine, black first suggested move is 1.- ..., g2, 1.- ..., h2 or 1.- ..., Kf2.FEN: 8/1p6/1P1p4/1K1p2B1/P2P4/6pp/1P6/5k2 w - - 0 1
Komodo3-32:
1 00:00 37 1.184 -3,49 Bg5f4 g3g2
2 00:00 92 2.944 -2,84 Bg5f4 g3g2 Bf4h2
3 00:00 149 4.768 -2,97 Bg5f4 g3g2 Bf4h2 Kf1f2
4 00:00 231 7.392 -2,87 Bg5f4 g3g2 Bf4h2 Kf1f2 b2b3
5 00:00 299 9.568 -3,03 Bg5f4 g3g2
5 00:00 892 28.544 -3,09 Bg5f4 h3h2 Bf4xg3 h2h1Q Bg3xd6 Qh1e4 Kb5c5 Kf1e2
5 00:00 989 31.648 -3,09 Bg5f4 h3h2 Bf4xg3 h2h1Q Bg3xd6 Qh1e4 Kb5c5 Kf1e2
6 00:00 1.386 29.568 -3,25 Bg5f4 g3g2
6 00:00 1.627 34.709 -3,72 Bg5f4 g3g2
6 00:00 1.937 41.322 -4,19 Bg5f4 g3g2 Bf4h2 g2g1Q Bh2xg1 Kf1xg1 a4a5 h3h2 a5a6 b7xa6+ Kb5xa6 h2h1Q
6 00:00 2.138 45.610 -4,19 Bg5f4 g3g2 Bf4h2 g2g1Q Bh2xg1 Kf1xg1 a4a5 h3h2 a5a6 b7xa6+ Kb5xa6 h2h1Q
7 00:00 3.308 52.928 -4,38 Bg5f4 Kf1f2 a4a5 h3h2 a5a6 b7xa6+ Kb5xa6 h2h1Q Bf4xd6 g3g2 b6b7 Qh1a1+
7 00:00 3.499 55.984 -4,38 Bg5f4 Kf1f2 a4a5 h3h2 a5a6 b7xa6+ Kb5xa6 h2h1Q Bf4xd6 g3g2 b6b7 Qh1a1+
8 00:00 4.386 70.176 -4,38 Bg5f4 Kf1f2 a4a5 h3h2 a5a6 b7xa6+ Kb5xa6 h2h1Q Bf4xd6 g3g2 b6b7 Qh1a1+ Bd6a3
8 00:00 4.638 59.366 -4,38 Bg5f4 Kf1f2 a4a5 h3h2 a5a6 b7xa6+ Kb5xa6 h2h1Q Bf4xd6 g3g2 b6b7 Qh1a1+ Bd6a3
9 00:00 8.421 89.824 -4,22 Bg5f4
9 00:00 10.601 113.077 -4,05 Bg5f4 Kf1f2 a4a5 h3h2 a5a6 b7xa6+ Kb5xa6 h2h1Q b6b7 Qh1a1+ Ka6b6 Qa1xb2+ Kb6c7 Kf2f3 Bf4xd6
9 00:00 10.871 115.957 -4,05 Bg5f4 Kf1f2 a4a5 h3h2 a5a6 b7xa6+ Kb5xa6 h2h1Q b6b7 Qh1a1+ Ka6b6 Qa1xb2+ Kb6c7 Kf2f3 Bf4xd6
10 00:00 22.397 159.267 -3,89 Bg5f4
10 00:00 25.649 164.153 -3,90 Bg5f4 Kf1f2
10 00:00 34.884 171.736 -4,04 Bg5f4 Kf1f2 a4a5 h3h2 a5a6 b7xa6+ Kb5c6 h2h1Q b6b7 Qh1h8 Bf4xd6 Qh8e8+ Kc6c7 g3g2 b7b8Q Qe8xb8+ Kc7xb8 g2g1Q
10 00:00 39.754 169.617 -4,04 Bg5f4 Kf1f2 a4a5 h3h2 a5a6 b7xa6+ Kb5c6 h2h1Q b6b7 Qh1h8 Bf4xd6 Qh8e8+ Kc6c7 g3g2 b7b8Q Qe8xb8+ Kc7xb8 g2g1Q
11 00:00 83.568 205.705 -4,11 Bg5f4 Kf1f2 a4a5 h3h2 a5a6 b7xa6+ Kb5c6 h2h1Q b6b7 Qh1h8 Bf4xd6 g3g2 b7b8Q Qh8xb8 Bd6xb8 g2g1Q Bb8d6 Qg1g8 Kc6c5 Qg8e6 b2b3
11 00:00 87.181 206.651 -4,11 Bg5f4 Kf1f2 a4a5 h3h2 a5a6 b7xa6+ Kb5c6 h2h1Q b6b7 Qh1h8 Bf4xd6 g3g2 b7b8Q Qh8xb8 Bd6xb8 g2g1Q Bb8d6 Qg1g8 Kc6c5 Qg8e6 b2b3
12 00:00 114.539 222.136 -4,27 Bg5f4 Kf1f2
12 00:01 229.413 244.707 -4,27 Bg5f4 Kf1f2 a4a5 h3h2 a5a6 b7xa6+ Kb5c6 h2h1Q b6b7 Qh1h8 Bf4xd6 g3g2 b7b8Q Qh8xb8 Bd6xb8 g2g1Q Bb8d6 Qg1g8 Kc6c5 Qg8e6 Kc5c6 Qe6f7 b2b3 Qf7e6
12 00:01 229.687 240.983 -4,27 Bg5f4 Kf1f2 a4a5 h3h2 a5a6 b7xa6+ Kb5c6 h2h1Q b6b7 Qh1h8 Bf4xd6 g3g2 b7b8Q Qh8xb8 Bd6xb8 g2g1Q Bb8d6 Qg1g8 Kc6c5 Qg8e6 Kc5c6 Qe6f7 b2b3 Qf7e6
13 00:01 240.913 244.737 -4,27 Bg5f4 Kf1f2 a4a5 h3h2 a5a6 b7xa6+ Kb5c6 h2h1Q b6b7 Qh1h8 Bf4xd6 g3g2 b7b8Q Qh8xb8 Bd6xb8 g2g1Q Bb8d6 Qg1g8 Kc6c5 Qg8e6 Kc5c6 Qe6f7
13 00:01 242.974 242.974 -4,27 Bg5f4 Kf1f2 a4a5 h3h2 a5a6 b7xa6+ Kb5c6 h2h1Q b6b7 Qh1h8 Bf4xd6 g3g2 b7b8Q Qh8xb8 Bd6xb8 g2g1Q Bb8d6 Qg1g8 Kc6c5 Qg8e6 Kc5c6 Qe6f7
14 00:01 295.120 248.522 -4,28 Bg5f4 Kf1f2 a4a5 h3h2 a5a6 b7xa6+ Kb5c6 h2h1Q b6b7 Qh1h8 Bf4xd6 g3g2 b7b8Q Qh8xb8 Bd6xb8 g2g1Q Bb8d6 Qg1g8 Kc6c5 Qg8e6 Kc5c6 Qe6f7 b2b3 Qf7f3
14 00:01 417.027 254.187 -4,28 Bg5f4 Kf1f2 a4a5 h3h2 a5a6 b7xa6+ Kb5c6 h2h1Q b6b7 Qh1h8 Bf4xd6 g3g2 b7b8Q Qh8xb8 Bd6xb8 g2g1Q Bb8d6 Qg1g8 Kc6c5 Qg8e6 Kc5c6 Qe6f7 b2b3 Qf7f3
15 00:03 768.528 268.774 -4,27 Bg5f4 Kf1f2 a4a5 h3h2 a5a6 b7xa6+ Kb5c6 h2h1Q b6b7 Qh1h8 Bf4xd6 g3g2 b7b8Q Qh8xb8 Bd6xb8 g2g1Q Bb8d6 Qg1g8 Kc6c5 Qg8e6 Kc5c6 Qe6f7 Bd6e5 Qf7g8 b2b3 Qg8e6+ Be5d6 Kf2e3
15 00:03 771.615 268.387 -4,27 Bg5f4 Kf1f2 a4a5 h3h2 a5a6 b7xa6+ Kb5c6 h2h1Q b6b7 Qh1h8 Bf4xd6 g3g2 b7b8Q Qh8xb8 Bd6xb8 g2g1Q Bb8d6 Qg1g8 Kc6c5 Qg8e6 Kc5c6 Qe6f7 Bd6e5 Qf7g8 b2b3 Qg8e6+ Be5d6 Kf2e3
16 00:13 3.397.450 261.656 -4,43 Bg5f4 Kf1f2
16 00:14 3.837.304 264.641 -4,43 Bg5f4 Kf1f2 a4a5 h3h2 a5a6 b7xa6+ Kb5c6 h2h1Q b6b7 g3g2 b7b8Q g2g1Q Bf4xd6 Qg1c1+ Bd6c5 Qh1h6+ Qb8d6 Qh6xd6+ Kc6xd6 Qc1h1 Kd6c6 Qh1f3 b2b4 Qf3f7 Bc5d6 Qf7e6 Kc6c5 Kf2e3
16 00:14 3.837.748 264.387 -4,43 Bg5f4 Kf1f2 a4a5 h3h2 a5a6 b7xa6+ Kb5c6 h2h1Q b6b7 g3g2 b7b8Q g2g1Q Bf4xd6 Qg1c1+ Bd6c5 Qh1h6+ Qb8d6 Qh6xd6+ Kc6xd6 Qc1h1 Kd6c6 Qh1f3 b2b4 Qf3f7 Bc5d6 Qf7e6 Kc6c5 Kf2e3
17 00:24 6.454.516 270.169 -4,27 Bg5f4
17 00:24 6.730.543 271.256 -4,28 Bg5f4 Kf1f2
17 00:46 12.878.248 275.747 -4,59 Bg5f4 Kf1f2 a4a5 h3h2 a5a6 b7xa6+ Kb5c6 h2h1Q b6b7 g3g2 b7b8Q g2g1Q Qb8xd6 Qg1d1 Qd6b4 Qh1h8 Bf4e5 Qh8a8+ Kc6b6 Qd1d3 Be5f4 Qa8h8 Bf4e5 Qh8d8+ Kb6a7 Qd8d7+ Ka7a8 Qd7c8+ Qb4b8 Qc8xb8+ Ka8xb8 Qd3b5+
17 00:47 13.145.206 275.833 -4,59 Bg5f4 Kf1f2 a4a5 h3h2 a5a6 b7xa6+ Kb5c6 h2h1Q b6b7 g3g2 b7b8Q g2g1Q Qb8xd6 Qg1d1 Qd6b4 Qh1h8 Bf4e5 Qh8a8+ Kc6b6 Qd1d3 Be5f4 Qa8h8 Bf4e5 Qh8d8+ Kb6a7 Qd8d7+ Ka7a8 Qd7c8+ Qb4b8 Qc8xb8+ Ka8xb8 Qd3b5+
18 01:04 17.479.089 273.846 -4,59 Bg5f4 Kf1f2 a4a5 h3h2 a5a6 b7xa6+ Kb5c6 h2h1Q b6b7 g3g2 b7b8Q g2g1Q Bf4xd6 Qg1c1+ Bd6c5 Qc1c4 Qb8f4+ Kf2e2 Qf4g4+ Qh1f3 Qg4xf3+ Ke2xf3 b2b4 Kf3e4 Kc6b6 Qc4b5+ Kb6c7 Qb5f1 Kc7b7 Ke4e3 Kb7c6 Qf1f7 Kc6b6 Qf7f6+ Kb6a5
18 01:04 17.494.002 273.811 -4,59 Bg5f4 Kf1f2 a4a5 h3h2 a5a6 b7xa6+ Kb5c6 h2h1Q b6b7 g3g2 b7b8Q g2g1Q Bf4xd6 Qg1c1+ Bd6c5 Qc1c4 Qb8f4+ Kf2e2 Qf4g4+ Qh1f3 Qg4xf3+ Ke2xf3 b2b4 Kf3e4 Kc6b6 Qc4b5+ Kb6c7 Qb5f1 Kc7b7 Ke4e3 Kb7c6 Qf1f7 Kc6b6 Qf7f6+ Kb6a5
19 01:27 23.647.902 272.059 -4,75 Bg5f4 Kf1f2
19 02:01 33.454.945 276.023 -4,74 Bg5f4
19 02:14 37.483.347 278.816 -4,78 Bg5f4 Kf1f2 a4a5 h3h2 a5a6 b7xa6+ Kb5c6 h2h1Q b6b7 g3g2 b7b8Q g2g1Q Qb8xd6 Qg1d1 Qd6c5 Qh1e4 Bf4c7 Qd1b3 Qc5b6 Qe4e8+ Kc6b7 Qb3xb6+ Bc7xb6 Qe8b5 b2b3 Kf2e3 b3b4 Ke3d3 Kb7a7 Kd3c4 Ka7b7 Kc4xb4
19 02:15 37.584.560 278.791 -4,78 Bg5f4 Kf1f2 a4a5 h3h2 a5a6 b7xa6+ Kb5c6 h2h1Q b6b7 g3g2 b7b8Q g2g1Q Qb8xd6 Qg1d1 Qd6c5 Qh1e4 Bf4c7 Qd1b3 Qc5b6 Qe4e8+ Kc6b7 Qb3xb6+ Bc7xb6 Qe8b5 b2b3 Kf2e3 b3b4 Ke3d3 Kb7a7 Kd3c4 Ka7b7 Kc4xb4
20 02:34 43.661.763 283.834 -4,84 Bg5f4 Kf1f2 a4a5 h3h2 a5a6 b7xa6+ Kb5c6 h2h1Q b6b7 g3g2 b7b8Q g2g1Q Qb8xd6 Qg1d1 Qd6c5 Qh1e4 Bf4c7 Qd1b3 Qc5b6 Qe4e8+ Kc6b7 Qb3xb6+ Bc7xb6 Qe8b5 b2b3 Kf2e3 b3b4 Ke3d3 Kb7a7 Kd3c4 Bb6c5 Qb5c6 Bc5b6
20 02:39 45.259.292 283.230 -4,84 Bg5f4 Kf1f2 a4a5 h3h2 a5a6 b7xa6+ Kb5c6 h2h1Q b6b7 g3g2 b7b8Q g2g1Q Qb8xd6 Qg1d1 Qd6c5 Qh1e4 Bf4c7 Qd1b3 Qc5b6 Qe4e8+ Kc6b7 Qb3xb6+ Bc7xb6 Qe8b5 b2b3 Kf2e3 b3b4 Ke3d3 Kb7a7 Kd3c4 Bb6c5 Qb5c6 Bc5b6
21 03:28 58.764.684 281.908 -5,00 Bg5f4 g3g2
21 03:43 63.226.872 282.696 -5,47 Bg5f4 g3g2
21 04:12 70.862.266 280.538 -4,99 Bg5d2
21 04:13 70.958.255 280.536 0,00 Bg5d2 g3g2 Bd2a5 g2g1Q b2b4 Qg1xd4
21 04:13 70.967.468 280.538 0,00 Bg5d2 g3g2 Bd2a5 g2g1Q b2b4 Qg1xd4
22 04:13 70.992.580 280.551 0,00 Bg5d2 g3g2 Bd2a5 g2g1Q b2b4 Qg1xd4
22 04:13 71.034.016 280.541 0,00 Bg5d2 g3g2 Bd2a5 g2g1Q b2b4 Qg1xd4
23 04:13 71.062.229 280.583 0,00 Bg5d2 g3g2 Bd2a5 g2g1Q b2b4 Qg1xd4
23 04:14 71.288.852 280.612 0,00 Bg5d2 g3g2 Bd2a5 g2g1Q b2b4 Qg1xd4
24 04:14 71.320.071 280.649 0,00 Bg5d2 g3g2 Bd2a5 g2g1Q b2b4 Qg1xd4
24 04:15 71.655.722 280.744 0,00 Bg5d2 g3g2 Bd2a5 g2g1Q b2b4 Qg1xd4
25 04:15 71.718.311 280.800 0,00 Bg5d2 g3g2 Bd2a5 g2g1Q b2b4 Qg1xd4
25 04:18 72.604.197 280.833 0,00 Bg5d2 g3g2 Bd2a5 g2g1Q b2b4 Qg1xd4
26 04:18 72.657.061 280.868 0,00 Bg5d2 g3g2 Bd2a5 g2g1Q b2b4 Qg1xd4
The key moves for white side are 1.- Bd2, 2.- Ba5 and 3.- b4, looking for the stalemate and consequent draw.
Regards from Spain.
Ajedrecista.