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Chess engine: Zagreus 4.0 (Windows and Linux)

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Zagreus is a work in progress UCI Chess Engine. You can play against Zagreus on Lichess: https://lichess.org/@/Zagreus_Engine. You will also be able to find it's elo rating on there. At the time of writing this is around ~1800 rapid. 
Zagreus is a constantly changing engine with hopefully an increase in elo every update.

Author:Manuel Diaz  Rating CEDR=2016

v. 4.0:
Another big update! This time I reworked the whole search to be less buggy and more accurate. There seem to be some weaknesses that still need work (especially the endgame), but the engine performs much better now.

ELO Change (self-play)
Elo | 293.33 +- 28.67 (95%)
SPRT | 60.0+0.60s Threads=1 Hash=64MB
LLR | 2.95 (-2.94, 2.94) [0.50, 2.50]
Games | N: 888 W: 689 L: 78 D: 121
Penta | [3, 7, 74, 96, 264]

What's Changed
Evaluation of weak squares in mobility and defended minor pieces by @Dannyj1 in #60
Search rework by @Dannyj1 in #61

Individual statistics: Zagreus 2.0.0 alpha-2 - 105 games (+  7,=  1,- 97),  7.1 %
Critter 1.6a                  :   8 (+  0,=  0,-  8),  0.0 %
Houdini 1.5a                  :   2 (+  0,=  0,-  2),  0.0 %
ECE 20.1                      :   2 (+  0,=  0,-  2),  0.0 %
Xiphos 0.6.1                  :   2 (+  0,=  0,-  2),  0.0 %
Komodo 13.02                  :   2 (+  0,=  0,-  2),  0.0 %
Coiled 1.1                    :   2 (+  0,=  0,-  2),  0.0 %
Protej 0.6.3                  :   2 (+  0,=  0,-  2),  0.0 %
Lozza 2.4                     :   2 (+  0,=  0,-  2),  0.0 %
Expositor 2BR17               :   2 (+  0,=  0,-  2),  0.0 %
Kayra 1.7                     :   2 (+  0,=  0,-  2),  0.0 %
Igel 3.3.0                    :   6 (+  0,=  0,-  6),  0.0 %
Inanis 1.2.0                  :   4 (+  0,=  0,-  4),  0.0 %
Koivisto 9.0                  :   6 (+  0,=  0,-  6),  0.0 %
Caissa 1.5                    :   6 (+  0,=  0,-  6),  0.0 %
Frozenight 6.0.0              :   4 (+  0,=  0,-  4),  0.0 %
Jangine 2023-01-15            :   3 (+  1,=  0,-  2), 33.3 %
Renegade 0.7.0                :   4 (+  0,=  0,-  4),  0.0 %
Mess 0.0.2                    :   2 (+  0,=  0,-  2),  0.0 %
Clovis II                     :   8 (+  0,=  0,-  8),  0.0 %
Durandal 0.1.1                :   6 (+  6,=  0,-  0), 100.0 %
Princhess 0.9.0               :   6 (+  0,=  1,-  5),  8.3 %
Wasabi 1.5.0                  :   2 (+  0,=  0,-  2),  0.0 %
Sturddle 1.27                 :   8 (+  0,=  0,-  8),  0.0 %
Sting Black Hole 4            :   6 (+  0,=  0,-  6),  0.0 %
BlackMarlin 7.0               :   2 (+  0,=  0,-  2),  0.0 %
Corchess 20230125             :   2 (+  0,=  0,-  2),  0.0 %
Viridithas 7.0.0              :   2 (+  0,=  0,-  2),  0.0 %
Protej 0.6.4                  :   2 (+  0,=  0,-  2),  0.0 %


Github:https://github.com/Dannyj1/Zagreus/releases/tag/v4.0

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