New release: Mida 2.3

[jackk03]

Hello, I'm happy to announce the release of Mida v2.3 !
With this release, Mida is now available on all OS: it can be compiled using the makefile by following the instructions on the README
https://github.com/GiacomoPorpiglia/Mida
The engine's strength should be around 3120 Elo, but it sohuld be stronger if your hardware supports some of the compiling optimizations.
If you find any issues, please write them on the GitHub repository and I'll try to fix them

[chessica]

[d]5k2/pp3N2/5K2/5B2/8/8/8/8 w - - 0 1 mate in 9

Mida_2.3:

1 00:00,000 25 0 +9,95 Lf5-g6
2 00:00,000 91 0 +11,61 Sf7-d8 a7-a6
3 00:00,000 135 0 +11,22 Sf7-d8 a7-a6 Lf5-c8
4 00:00,000 289 0 +11,51 Lf5-c2 a7-a5 Lc2-b3 b7-b6
5 00:00,000 706 0 +10,10 Lf5-c2 a7-a5 Lc2-b3 b7-b5 Sf7-g5
6 00:00,000 895 0 +10,90 Lf5-c2 a7-a5 Lc2-b3 b7-b5 Sf7-g5 Kf8-e8
7 00:00,015 3k 197k +12,60 Lf5-d7 a7-a5 Sf7-g5 b7-b5 Ld7xb5 a5-a4 Lb5xa4
8 00:00,031 5k 170k +12,71 Lf5-d7 a7-a5 Sf7-g5 Kf8-g8 Kf6-g6 Kg8-f8 Sg5-e4 Kf8-e7
9 00:00,062 12k 191k +12,53 Sf7-e5 a7-a5 Se5-d7+ Kf8-e8 Sd7-b6 a5-a4 Kf6-e5 Ke8-d8 Lf5-e6 a4-a3
10 00:00,109 17k 156k +13,89 Sf7-e5 Kf8-e8 Kf6-e6 a7-a5 Ke6-d6 a5-a4 Lf5-g6+ Ke8-d8 Se5-d3 Kd8-c8 Sd3-b4
11 00:00,140 22k 160k +13,31 Sf7-e5 Kf8-e8 Kf6-e6 a7-a5 Ke6-d6 Ke8-d8 Lf5-g6 a5-a4 Se5-c4 b7-b5 Sc4-e3
12 00:00,406 66k 161k +13,83 Lf5-d7 a7-a5 Ld7-a4 b7-b5 La4xb5 a5-a4 Lb5xa4 Kf8-g8 La4-b5 Kg8-h7 Sf7-d6 Kh7-g8
13 00:00,484 76k 157k +14,21 Lf5-d7 a7-a5 Sf7-d6 b7-b5 Ld7xb5 a5-a4 Lb5xa4 Kf8-g8 La4-c6 Kg8-h7 Lc6-b5 Kh7-h8 Lb5-d7
14 00:00,671 105k 156k +14,98 Lf5-d7 a7-a6 Sf7-d6 b7-b6 Ld7-f5 a6-a5 Lf5-d7 b6-b5 Sd6xb5 a5-a4 Sb5-a3 Kf8-g8 Sa3-c2 Kg8-f8
15 00:00,968 154k 159k +14,21 Lf5-d7 a7-a6 Sf7-d6 b7-b5 Ld7-c6 a6-a5 Lc6xb5 a5-a4 Lb5xa4 Kf8-g8 La4-c6 Kg8-h7 Lc6-b5 Kh7-h8 Lb5-d7
16 00:01,875 298k 159k +14,13 Sf7-d6 a7-a6 Lf5-e6 b7-b5 Le6-a2 b5-b4 La2-b3 a6-a5 Lb3-a4 b4-b3 La4xb3 a5-a4 Lb3-a2 a4-a3 Kf6-g6 Kf8-e7
17 00:02,093 334k 160k +15,82 Sf7-d6 a7-a6 Lf5-d7 b7-b6 Ld7-f5 a6-a5 Lf5-d7 b6-b5 Sd6xb5 a5-a4 Ld7-e6 Kf8-e8 Sb5-a7 a4-a3 Le6-a2 Ke8-d7 Kf6-g6
18 00:04,703 753k 160k +15,57 Sf7-d6 a7-a6 Lf5-e6 b7-b5 Le6-b3 a6-a5 Sd6xb5 Kf8-e8 Lb3-e6 a5-a4 Sb5-a7 a4-a3 Le6-a2 Ke8-d7 Kf6-g6 Kd7-d8 Sa7-b5 Kd8-d7
19 00:06,296 1.009k 160k +15,55 Sf7-d6 a7-a6 Lf5-d7 b7-b6 Ld7-e6 b6-b5 Le6-b3 a6-a5 Sd6xb5 Kf8-e8 Lb3-e6 Ke8-f8 Sb5-a7 a5-a4 Le6-c4 Kf8-e8 Lc4-a2 Ke8-d7 La2-b1
20 00:15,296 2.456k 161k +15,11 Lf5-d7 a7-a6 Sf7-d6 b7-b5 Ld7-e6 b5-b4 Le6-b3 a6-a5 Lb3-a4 Kf8-g8 Sd6-c8 Kg8-h8 Kf6-e6 b4-b3 La4xb3 a5-a4 Lb3-a2 Kh8-g7 Ke6-d7 a4-a3
21 00:23,546 3.789k 161k +17,11 Sf7-d6 a7-a5 Lf5-e6 a5-a4 Le6-c4 b7-b5 Sd6xb5 Kf8-e8 Lc4-e6 Ke8-d8 Kf6-f7 a4-a3 Le6-a2 Kd8-d7 Sb5-c3 Kd7-d6 Kf7-g7 Kd6-c5 Kg7-g6 Kc5-b4 Sc3-e2
22 00:25,953 4.173k 161k +17,09 Lf5-d7 a7-a6 Sf7-d6 a6-a5 Ld7-a4 Kf8-g8 Sd6xb7 Kg8-h7 La4-c2+ Kh7-g8 Sb7xa5 Kg8-f8 Lc2-g6 Kf8-g8 Sa5-c6 Kg8-f8 Sc6-a7 Kf8-g8 Lg6-e8 Kg8-f8 Le8-d7 Kf8-g8 Ld7-f5
23 00:28,984 4.660k 161k +17,09 Lf5-d7 a7-a6 Sf7-d6 a6-a5 Ld7-a4 Kf8-g8 Sd6xb7 Kg8-f8 Sb7-d6 Kf8-g8 Sd6-c8 Kg8-h7 Sc8-a7 Kh7-h8 La4-e8 a5-a4 Le8xa4 Kh8-g8 La4-e8 Kg8-f8 Le8-d7 Kf8-g8 Ld7-f5
24 00:33,500 5.386k 161k +17,09 Lf5-d7 a7-a6 Sf7-d6 a6-a5 Ld7-a4 Kf8-g8 Sd6xb7 Kg8-h8 Sb7xa5 Kh8-h7 La4-e8 Kh7-h6 Sa5-c6 Kh6-h7 Sc6-a7 Kh7-g8 Le8-h5 Kg8-f8 Lh5-f3 Kf8-e8 Lf3-c6+ Ke8-f8 Lc6-d7 Kf8-g8 Ld7-f5
25 00:42,203 6.771k 160k +17,36 Lf5-d7 a7-a6 Sf7-d6 a6-a5 Sd6xb7 a5-a4 Ld7xa4 Kf8-g8 La4-e8 Kg8-h8 Sb7-d6 Kh8-g8 Sd6-c8 Kg8-h7 Le8-c6 Kh7-h6 Lc6-f3 Kh6-h7 Sc8-a7 Kh7-g8 Lf3-h5 Kg8-h7 Lh5-e8 Kh7-h6 Le8-c6
26 00:48,593 7.786k 160k +17,36 Lf5-d7 a7-a6 Sf7-d6 a6-a5 Sd6xb7 a5-a4 Ld7xa4 Kf8-g8 La4-e8 Kg8-h8 Sb7-d6 Kh8-g8 Sd6-c8 Kg8-h7 Sc8-a7 Kh7-g8 Le8-c6 Kg8-h7 Lc6-e4+ Kh7-h6 Le4-f3 Kh6-h7 Lf3-h5 Kh7-g8 Lh5-e8 Kg8-f8 Le8-b5
27 00:57,328 9.182k 160k +17,36 Lf5-d7 a7-a6 Sf7-d6 a6-a5 Sd6xb7 a5-a4 Ld7xa4 Kf8-g8 La4-e8 Kg8-h8 Sb7-d6 Kh8-g8 Sd6-c8 Kg8-h7 Sc8-a7 Kh7-g8 Le8-a4 Kg8-h8 La4-d7 Kh8-g8 Ld7-f5 Kg8-f8 Lf5-g6 Kf8-g8 Lg6-e8 Kg8-f8 Le8-b5
28 15:54,015 170.572k 179k +M14 Lf5-d7 b7-b5 Ld7xb5 a7-a5 Lb5-a4 Kf8-g8 Sf7-g5 Kg8-h8 Sg5-e6 Kh8-h7 Kf6-g5 Kh7-g8 Kg5-g6 Kg8-h8 Se6-f8 Kh8-g8 Sf8-h7 Kg8-h8 La4-e8 a5-a4 Le8-f7 a4-a3 Sh7-f8 a3-a2 Kg6-h6 a2-a1D Sf8-g6+
29 31:09,109 316.374k 169k +19,52 Sf7-d6 a7-a5 Lf5-d7 b7-b6 Sd6-c4 Kf8-g8 Sc4xb6 Kg8-h7 Ld7-e8 Kh7-g8 Sb6-d7 Kg8-h7 Sd7-f8+ Kh7-g8 Sf8-e6 Kg8-h7 Se6-g5+ Kh7-h8 Le8-a4 Kh8-g8 La4-b3+ Kg8-h8 Sg5-f7+ Kh8-g8 Lb3-a2 a5-a4 Sf7-g5+ Kg8-h8 Kf6-g6 a4-a3 Sg5-e6 Kh8-g8 Se6-c7+ Kg8-f8 Sc7-a6
30 32:17,203 327.471k 169k +21,30 Sf7-d6 a7-a5 Lf5-d7 b7-b6 Sd6-c4 Kf8-g8 Sc4xb6 Kg8-h7 Sb6-c8 a5-a4 Ld7xa4 Kh7-h6 La4-e8 Kh6-h7 Sc8-e7 Kh7-h6 Se7-c6 Kh6-h7 Le8-g6+ Kh7-h6 Lg6-f7 Kh6-h7 Lf7-e8 Kh7-g8 Le8-d7 Kg8-h7 Sc6-a7 Kh7-h6 Ld7-e8 Kh6-h7 Le8-c6
31 36:54,109 371.929k 168k +21,35 Sf7-d6 a7-a5 Lf5-d7 b7-b6 Ld7-b5 Kf8-g8 Kf6-g6 a5-a4 Lb5xa4 b6-b5 La4xb5 Kg8-h8 Lb5-e8 Kh8-g8 Sd6-c8 Kg8-f8 Le8-a4 Kf8-g8 La4-c6 Kg8-f8 Lc6-b5 Kf8-g8 Sc8-a7 Kg8-h8 Kg6-f6 Kh8-h7 Lb5-d7 Kh7-h6 Ld7-e8 Kh6-h7 Kf6-g5
32 45:01,250 450.766k 167k +21,66 Sf7-d6 a7-a5 Lf5-g6 a5-a4 Sd6-b5 Kf8-g8 Sb5-a3 b7-b6 Sa3-b5 a4-a3 Sb5xa3 Kg8-h8 Lg6-d3 Kh8-g8 Ld3-f5 Kg8-f8 Lf5-d7 Kf8-g8 Sa3-b5 Kg8-h8 Ld7-e6 Kh8-h7 Le6-f7 Kh7-h8 Lf7-e8 Kh8-h7 Sb5-d6 Kh7-h8 Sd6-f5 b6-b5 Sf5-e7 b5-b4

[jackk03]

That's an interesting position... even Stockfish struggles in finding this mate (I made it reach depth ~40 but it only found mate in 23), so it's for sure something hard to find due to the fact that the mate is probably "unexpected" seen from a few moves before, and so the branch always gets pruned early... I'll look into it (hoping there's no bug in my code that causes the issue), thanks

Edit: I didn't notice Mid actually found a mate at depth 28, and then "forgot about it". That's defenitely something weird to look into