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Chess engine: Viridithas 7.0.0 NNUE

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Chess engine: Viridithas   Author:Cosmo
Rating CEDR=3266

v.7.0.0:
New Features:
Syzygy Tablebase Probing using Fathom, allowing Viridithas to determine game-theoretic truth of low-piece endgames and play perfectly when in them. Much of the design is inspired/adapted from Tearth's Inanis.
Upgraded neural network (version 33) with a bigger architecture (384x2) and trained on better-quality data.
Remove bias toward disagreement between NNUE and PSQT (gained elo previously, now loses)
Upgraded history heuristics for better move ordering (better formula and less ageing between searches)
Order underpromotions last in move-picking.
More robust PV reporting using stack PV lists.
Tuning of search pruning parameters.
More robust best-move collection from aborted search.
Avoid TT-cutoffs in PV or when fifty-move rule is high.
Make quiescence search slightly more aware of possible mates.
Double extensions for extremely singular moves.
Razoring.
Internal Iterative Deepening.
Apply singular extensions for exact-bound TT hits, in addition to lower-bound ones.
Multi-cut in singular extension function.
Lift restrictions to allow reducing extended moves.
Add go mate X UCI command.
Add UseNNUE UCI option.


Individual statistics: Viridithas 2.6.0 - 305 games (+134,= 49,-122), 52.0 %
Fisherov 0.98k                :   2 (+  0,=  0,-  2),  0.0 %
Slowchess 2.9                 :   2 (+  0,=  0,-  2),  0.0 %
Fisherov chess monk 1.2       :   2 (+  0,=  0,-  2),  0.0 %
RubiChess 20220813            :   2 (+  0,=  0,-  2),  0.0 %
Dumb 1.11                     :   4 (+  2,=  2,-  0), 75.0 %
Roc 2022Aug18                 :   4 (+  0,=  0,-  4),  0.0 %
Seawall 20220818              :   6 (+  5,=  0,-  1), 83.3 %
Velvet 4.1.0                  :   2 (+  0,=  0,-  2),  0.0 %
Caissa 0.9.0                  :   4 (+  0,=  0,-  4),  0.0 %
Devre 3.13                    :   2 (+  0,=  0,-  2),  0.0 %
Fire-zero 08222022            :   2 (+  0,=  0,-  2),  0.0 %
Flaming Titz 230822           :   2 (+  0,=  0,-  2),  0.0 %
Wasp 6.00                     :   2 (+  0,=  0,-  2),  0.0 %
Atlas 4.25                    :   2 (+  0,=  0,-  2),  0.0 %
Blue Marlin 15.3a             :   2 (+  0,=  0,-  2),  0.0 %
Minic 3.28                    :   2 (+  0,=  0,-  2),  0.0 %
Teal Oracle                   :   2 (+  0,=  0,-  2),  0.0 %
Alexandria 2.4                :   4 (+  0,=  0,-  4),  0.0 %
Avalanche 1.2.0               :   4 (+  0,=  1,-  3), 12.5 %
BigBallz 010922               :   2 (+  0,=  0,-  2),  0.0 %
ShashChess 24                 :   4 (+  0,=  0,-  4),  0.0 %
Kayra 1.5 Dynamics            :   6 (+  0,=  0,-  6),  0.0 %
Fire-zero 09022022            :   4 (+  0,=  0,-  4),  0.0 %
BlackCore 1.0                 :   4 (+  4,=  0,-  0), 100.0 %
Trinket 2.0.0                 :   4 (+  4,=  0,-  0), 100.0 %
Frozenight 5.0.0              :   4 (+  0,=  1,-  3), 12.5 %
Fornax 3.0                    :   4 (+  4,=  0,-  0), 100.0 %
MadChess 3.1                  :   8 (+  3,=  2,-  3), 50.0 %
StockNemo 5.3.0.0             :   8 (+  0,=  0,-  8),  0.0 %
CT800 1.44                    :   8 (+  7,=  1,-  0), 93.8 %
Rusty Pigeon 1.0              :   6 (+  6,=  0,-  0), 100.0 %
Fatalii 0.2.1                 :   2 (+  2,=  0,-  0), 100.0 %
Lumac0 14.0                   :   2 (+  2,=  0,-  0), 100.0 %
Stockfish 070922              :   2 (+  0,=  0,-  2),  0.0 %
Weiss 2.1 dev                 :   2 (+  0,=  0,-  2),  0.0 %
RukChess 3.0 2022-09-05       : 183 (+ 95,= 42,- 46), 63.4 %

github:https://github.com/cosmobobak/viridithas/releases/tag/v7.0.0

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