Chess engine: Zagreus 5.0 (Windows and Linux)

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. 5.0:

ELO Change (self-play)

Elo | 113.74 +- 16.13 (95%)

SPRT | 60.0+0.60s Threads=1 Hash=64MB

LLR | 2.95 (-2.94, 2.94) [0.50, 2.50]

Games | N: 1474 W: 787 L: 321 D: 366

Penta | [27, 73, 235, 211, 191]

What's Changed

Check extension in search by @Dannyj1 in #71

Fix check extension causing less TT hits by @Dannyj1 in #72

Late Move Reduction by @Dannyj1 in #73

Bias tuner towards smaller evaluation values by lowering base values by @Dannyj1 in #74

Tuner: Five-point Stencil Approximation, Train for multiple epochs, accuracy improvements & bug fixes by @Dannyj1 in #76

Fix compilation by @Dannyj1 in #77

Zagreus 4.1 - results:

Protej 20231226b	0.5/4	-3	4 Partii
LTChess 9.3	0/4	-4	4 Partii
Incognito 5	0/4	-4	4 Partii
Anduril	0/4	-4	4 Partii
Altair 6.0.0	0/4	-4	4 Partii
Ice4 v4	0/4	-4	4 Partii
Peacekeeper 2.20	0/4	-4	4 Partii
Pawn 2.0	0/4	-4	4 Partii
4ku 4.0	0/4	-4	4 Partii
Dumb 2.0	0/4	-4	4 Partii
Sloth 1.5	1.5/2	+1	2 Partii
Eubos 3.00	1/2	+0	2 Partii
Thrawn 1.1	1/2	+0	2 Partii
Maxwell 3.0.7	1/2	+0	2 Partii
Shuffle 4.4.0	0.5/2	-1	2 Partii
ChessMaster 2023	0.5/2	-1	2 Partii
Protej 20231212a	0/2	-2	2 Partii
RofChade 3.1	0/2	-2	2 Partii
Stormphrax 4.0.0	0/2	-2	2 Partii
Lynx 1.1.0	0/2	-2	2 Partii
Lc0 BT4	0/2	-2	2 Partii

Zagreus 5.0 download

Github:https://github.com/Dannyj1/Zagreus/releases/tag/v5.0