Renegade 0.5.1

Version 0.5.1 (December 17, 2022)

• Fixed crashing when opponent makes a move that resets the fifty-move counter right before reaching 50
• Fixed fast legal move existance function to not be blind to some checkmates

Score of Renegade 0.5.1 vs Renegade 0.4.0: 133 - 45 - 22 [0.720]
...      Renegade 0.5.1 playing White: 66 - 23 - 11  [0.715] 100
...      Renegade 0.5.1 playing Black: 67 - 22 - 11  [0.725] 100
...      White vs Black: 88 - 90 - 22  [0.495] 200
Elo difference: 164.1 +/- 50.3, LOS: 100.0 %, DrawRatio: 11.0 %

Renegade 0.5.0

Version 0.5.0 (December 17, 2022)

• Faster move generation (50k -> 320k nps, perft: 0.95m -> 4.4m)
  • Lazy move legality checking
  • Bulk bitwise attack map generation
  • Usage of lzcnt instructions
  • Early stop for legal move existance checking if the king has an adjacent non-attacked square
• Increased default hash size again: 16 -> 64 MB
• Some parts of the code had been cleaned up

Renegade 0.4.0

Version 0.4.0 (December 9, 2022)

• Proper move ordering instead of interior node evaluation
• Principal variation search
• Killer move heuristic (2 moves / ply)
• Full PV output (instead of the first move only)
• Support for more UCI search parameters and limits (such as nodes, depth and movetime)
• More granular time management
• Storing node type in transposition table
• Implemented 'hard' time limits
• Temporarily removed quiescence search
• No longer performs an illegal move after detecting a draw
• Minor changes:
  • kiwipete position shortcut
  • 'debug sizeof' command

Score of Renegade dev vs Renegade 0.3.0: 228 - 20 - 12 [0.900]
...      Renegade dev playing White: 111 - 12 - 7  [0.881] 130
...      Renegade dev playing Black: 117 - 8 - 5  [0.919] 130
...      White vs Black: 119 - 129 - 12  [0.481] 260
Elo difference: 381.7 +/- 68.1, LOS: 100.0 %, DrawRatio: 4.6 %

Renegade 0.3.0

Version 0.3.0 (November 19, 2022)

• Limited support for opening books
• Three-fold repetition recognition
• Fixed flipped piece-square tables (whoops)
• Option for enabling quiescence search (disabled by default)
• Popcnt for accelerating move generation
• Simplified sliding piece attack map generation
• Configurable engine settings: Hash, QSearch, OwnBook
• New debug commands (debug draw, debug eval, debug settings, debug hashalloc, debug pasthashes)
• Shorthand for disabling the opening book: nb (same as 'setoption name OwnBook value False')

Score of Renegade dev vs Renegade 0.2.0: 20 - 3 - 7 [0.783]
Elo difference: 223.3 +/- 134.2, LOS: 100.0 %, DrawRatio: 23.3 %

Renegade 0.2.0

Version 0.2.0 (November 11, 2022)

• Project renamed to Renegade
• New function for checking the existence of a legal move (instead of generating all of them and checking if size > 0), resulting in a huge nps increase)
• Added transposition tables with a max size of 125000
• Implemented Zobrist hashing
• More efficient move generation, bitboards used in more places
• Simplified sliding piece move generation
• Memory reservation for lists
• Fixed using empty() instead of clear()
• Displaying hashfull and the first move of pv for output
• Perft speed: ~800k, nps: ~150k

Renegade (Damnchess++) 0.1.0

Version 0.1.0 (November 6, 2022)

• The first mostly stable iteration of the C++ implementation
• First version playing on Lichess, still named Damnchess and without a version number
• Bulk of it was written on October 30, 2022
• Basic alpha-beta pruning (5 ply deep in average)
• Time management to avoid running out of time
• Should pass all perft tests
• Perft speed: ~300k, nps: ~25k

Python versions (October 2022)

• Beginning of the journey: October 7, 2022
• Based on python-chess, doing about 10-11k nps