Chess engine: Clovis III

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Clovis - UCI chess engine.
Rating CEDR=2854

Named after the first king of the Franks and the paleoamerican mammoth slayers, Clovis is a powerful UCI chess engine written in C++. It is a successor to [Hopper Chess](https://github.com/jonathanmcdermid/Hopper-Chess-Engine) in that it follows standard convention more closely. 

v.III:
Clovis is born again!

implemented gradient descent tuner
disabled drawishness and some other evaluation functions until they are integrated into tuner
added some params to evaluation (candidate passer, rook on seventh)
vertically mirrored some PSQTs
Expecting a ~50 Elo improvement from Clovis II!

Individual statistics: Clovis I - 117 games (+ 41,= 17,- 59), 42.3 %
Critter 1.6a                  :   4 (+  0,=  0,-  4),  0.0 %
Delocto 0.61n                 :   1 (+  1,=  0,-  0), 100.0 %
Fritz 17                      :   2 (+  0,=  0,-  2),  0.0 %
Jinx 1.0                      :   1 (+  1,=  0,-  0), 100.0 %
Godel 7.0                     :   1 (+  0,=  1,-  0), 50.0 %
GOOB 1.0.0                    :   1 (+  1,=  0,-  0), 100.0 %
Weiawaga 5.0.0                :   1 (+  0,=  0,-  1),  0.0 %
Admete 1.5.0                  :   1 (+  0,=  1,-  0), 50.0 %
Caligula 1.0b                 :   1 (+  0,=  0,-  1),  0.0 %
OliThink 5.10.1               :   1 (+  0,=  1,-  0), 50.0 %
K2 0.99                       :   1 (+  1,=  0,-  0), 100.0 %
Novice 3.1                    :   1 (+  0,=  1,-  0), 50.0 %
Paulchen 332 0.1.1            :   1 (+  0,=  1,-  0), 50.0 %
Waxman 2020                   :   1 (+  1,=  0,-  0), 100.0 %
Ceechess 1.4                  :   1 (+  1,=  0,-  0), 100.0 %
Colossus 2022a                :   1 (+  0,=  0,-  1),  0.0 %
Amoeba 3.4                    :   1 (+  0,=  0,-  1),  0.0 %
Nirvanachess 2.5              :   1 (+  0,=  0,-  1),  0.0 %
BBC 1.4                       :   1 (+  0,=  0,-  1),  0.0 %
Topple 0.8.1                  :   1 (+  1,=  0,-  0), 100.0 %
Inanis 1.1.1                  :   1 (+  1,=  0,-  0), 100.0 %
CT800 1.44                    :   1 (+  0,=  1,-  0), 50.0 %
Fatalii 0.3.1                 :   1 (+  1,=  0,-  0), 100.0 %
Vafra 12.2 Cfish              :   2 (+  0,=  0,-  2),  0.0 %
Sturddle 1.04                 :   1 (+  0,=  0,-  1),  0.0 %
QuintBot 1.1.0                :   1 (+  1,=  0,-  0), 100.0 %
Kuma 1.0                      :   1 (+  0,=  0,-  1),  0.0 %
Princhess 0.8.0               :   1 (+  1,=  0,-  0), 100.0 %
Caissa 1.4                    :   2 (+  0,=  0,-  2),  0.0 %
RapChess 2022-12-08           :   1 (+  1,=  0,-  0), 100.0 %
Knightx 3.6a                  :   2 (+  1,=  1,-  0), 75.0 %
Cheese 3.1.1                  :   1 (+  0,=  0,-  1),  0.0 %
Little Goliath 3.16           :   2 (+  0,=  1,-  1), 25.0 %
Lc0 0.29.0                    :   2 (+  0,=  0,-  2),  0.0 %
Charisma Diamond              :   2 (+  0,=  0,-  2),  0.0 %
Mittens 0.9                   :   3 (+  0,=  0,-  3),  0.0 %
Uralochka 3.39d               :   2 (+  0,=  1,-  1), 25.0 %
RukChess 3.0.13 NNUE2         :   2 (+  0,=  0,-  2),  0.0 %
Seawall 20230105              :   2 (+  1,=  1,-  0), 75.0 %
Rebel 16.1                    :   2 (+  0,=  0,-  2),  0.0 %
Captain 3.1                   :   2 (+  2,=  0,-  0), 100.0 %
Sting Black Hole 3            :   4 (+  0,=  0,-  4),  0.0 %
Blue Marlin 15.6              :   4 (+  0,=  0,-  4),  0.0 %
Brainlearn 21.1               :   4 (+  0,=  0,-  4),  0.0 %
Carp 1.1.0                    :   4 (+  4,=  0,-  0), 100.0 %
Zagreus 1.1.0                 :   5 (+  5,=  0,-  0), 100.0 %
Raven 1.30                    :   5 (+  3,=  2,-  0), 80.0 %
Koivisto 8.17                 :   4 (+  0,=  1,-  3), 12.5 %
Peacekeeper 1.1               :   6 (+  3,=  2,-  1), 66.7 %
Akimbo 0.1.1                  :   6 (+  5,=  0,-  1), 83.3 %
BlackCore 5.0                 :   3 (+  0,=  0,-  3),  0.0 %
Stockfish dev-20230114        :   2 (+  0,=  1,-  1), 25.0 %
4ku 1.1                       :   5 (+  4,=  0,-  1), 80.0 %
Peacekeeper 1.10              :   1 (+  0,=  1,-  0), 50.0 %
Polyfish 230115               :   1 (+  0,=  0,-  1),  0.0 %
Charisma Saphir               :   1 (+  0,=  0,-  1),  0.0 %
ShashChess 27.2               :   2 (+  0,=  0,-  2),  0.0 %
Frozenight 6.0.0              :   1 (+  0,=  0,-  1),  0.0 %
Mess 0.0.2                    :   1 (+  1,=  0,-  0), 100.0 %

Clovis III download

github:https://github.com/jonathanmcdermid/Clovis/releases/tag/III

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