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WyldChess,
an UCI and Chess Engine Communication Protocol compliant open source chess engine by Manik Charan, licensed under the GNU General Public License v3.0, written in C/C++, first released in October 2016. Origin of ideas and implementations are documented inside the source code, e.g. tapered eval SIMD score ^[1], or SEE from Stockfish. Since version 1.5, released in June 2017, WyldChess supports Syzygy Bases ^[2].

Features

Board Representation

• Bitboards
• Dense Piece-Color Board-Definition
• 8x8 Board
• Little-Endian Rank-File Mapping
• Fancy Magic Bitboards by Pradu Kannan

Search

• Iterative Deepening ^[3]
• Aspiration Windows
• Principal Variation Search
• Transposition Table
  Zobrist Hashing
• Selectivity
  Futility Pruning
  Mate Distance Pruning
  Null Move Pruning
  Late Move Reductions
  Check Extensions
• Quiescence Search
• Move Ordering
  Internal Iterative Deepening
  Killer Heuristic
  History Heuristic (1.5)
  Countermove Heuristic

Evaluation

• Tapered Eval
• Material
  Bishop Pair
  Piece-Square Tables
• King Safety
  Attacking King Zone
  King Queen Tropism
• Pawn Structure
  Passed Pawn
  Isolated Pawn
  Doubled Pawn
• Rooks on (Semi) Open Files
• Rook on Seventh
• Bishop and Knight Outposts

Misc

• Syzygy Bases (1.5)

See also

• Teki

Forum Posts

• WyldChess new release now UCI by Günther Simon, CCC, October 13, 2016
• Strange beaviour of WyldChess under WinBoard by Gabor Szots, CCC, November 27, 2016
• WyldChess 1.3 released by Manik Charan, CCC, January 14, 2017
• WyldChess 1.4 released by Manik Charan, CCC, March 12, 2017
• WyldChess 1.5 released by Manik Charan, CCC, June 04, 2017

External Links

• GitHub - Mk-Chan/WyldChess: A UCI/Xboard compatible chess engine in C/C++
  GitHub - Mk-Chan/BBPerft: A fast, bitboard based chess perft result generator derived from WyldChess » Perft
• WyldChess at CCRL 40/4

References

1. ^ WyldChess/defs.h at master · Mk-Chan/WyldChess · GitHub
2. ^ WyldChess 1.5 released by Manik Charan, CCC, June 04, 2017
3. ^ Evaluation and Search Features mostly based on WyldChess/README.md at master · Mk-Chan/WyldChess · GitHub

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