Thanks
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- Stockfish authors
- Crafty authors

Version 1.0
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- Rewrote move generation for a big speed-up
- Pure material evaluation
- Null-move + Razoring + LMR in main search
- Hash table

Version 2.0
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- Mobility evaluation (thanks Fruit) 
- Bishop pair 
- Rep-draw detection 
- Better null-move pruning (thanks Stockfish) 
- Better LMR (and again, thanks Stockfish) 
- Bugfix with using hash move 
- Some speed optimizations

Version 3.0
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- 604.5/1000 or ~70 ELO better than previous version
- Killer moves
- Tuned PSQ tables/mobility
- Better king eval in endgame (won't stay on back row)
- Show '#' for checkmate
- Improved UI (new game, switch black/white, choose time/move)
- Fixed crashes from using invalid hash moves
- Other small bug fixes
- Speed optimizations

Version 4.0
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- 594.5/1000 %:59.45 or 66 Elo better than previous
- SEE added (QSearch pruning, losing captures in main search)
- No nullmove in pawn endgames
- Fixed hashtable bugs (RNG was bad)
- Fixed starting position when playing black
- Added ability to analyze position for browsers that support it
- Added support for pasting FEN positions

Version 5.0
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- Added checks in first ply of q-search (+15)

Version 5.1
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- Bugfix to hashtable storing (no elo change, but big help in endgames)

Version 6.0
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- Bonuses for knight attacking pieces (+20)
- Bonus for bishop pins (+40)

TODO:
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- Only extend checks with SEE > 0?
- Single reply to check should be marked as dangerous.