performance boost + correct 'matein' calculation

What's Changed

• bug fixes (matein) + performance boost by @sictransit in #32

Full Changelog: v1.2.1...v1.3.0

opening book is allowed per default

v1.2.1

bump version: 1.2.1

uci option toggle opening book usage

v1.2.0

uci option to toggle opening book usage

speed and accuracy

What's Changed

• reverted to JSON opening book by @sictransit in #27
• speed and accuracy improvements by @sictransit in #28

Full Changelog: v1.0.0...v1.1.0

major rewrite, optimization and bug fixes

This release should play a bit better, thanks to some bug fixes and better time management.

The README now contains some useful information as well.

What's Changed

• lots of long-forgotten changes, but they seem ok by @sictransit in #21
• net8.0 by @sictransit in #22
• major code cleanup, no multithreading, back to basics by @sictransit in #24
• move ordering + not dependant on uci movestogo by @sictransit in #25
• major rewrite + bug fixes by @sictransit in #26

Full Changelog: v0.9.5...v1.0.0

bug fixes, general code cleanup and improved performance

optimizations (fixed bugs, improved speed and general code cleanup)

* implemented parallel perft()
* code cleanup
* implemented stuck piece detection (except for pawns)
* trapped pieces score less
* fixed broken "go perft n"
* renamed to greek letters
* fixed alpha/beta pruning
* hashtable is now concurrent collection
* mended some tests + updated opening book

improved time management

v0.9.0

bumped version

bugfixes, performance, better scoring + "go perft"

bugfixes + performance; improved scoring; perft

* fixed possible bug in PV calc
* implemented "go perft <depth>" command
* improved scoring
* code review
* fixed PGN parsing with simple pawn move + promotion

FEN export

v0.7.0

implemented FEN export + added to "pretty print" of board

bug fixes (e.g. white looking at black's clock)

v0.6.0

fixed bug causing white to play on black's time limit