hash_keys.h File Reference

#include "../defs.h"
#include "setup.h"

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Functions
U64	generatePositionKeys (const S_BOARD *pos)
	Generates a Zobrist hash key for the given board position.

Function Documentation

generatePositionKeys()

U64 generatePositionKeys ( const S_BOARD * pos )

extern

Generates a Zobrist hash key for the given board position.

The key uniquely (with very high probability) represents:

• Pieces on all squares
• Side to move
• Castling rights
• En passant square (if any)

Parameters

pos	Pointer to the current board state.

Returns

64-bit Zobrist position key.

Definition at line 5 of file hash_keys.cpp.

References ASSERT, bK, BRD_SQ_NUM, S_BOARD::castlePerm, EMPTY, S_BOARD::enPas, NO_SQ, OFFBOARD, S_BOARD::pieces, RANK_3, RANK_6, rankIndex120, S_BOARD::side, SqOnBoard(), WHITE, wP, zobristCastleKeys, zobristPieceKeys, and zobristSideKey.

Referenced by isBoardStateValid(), loadFEN(), and mirrorBoardPosition().

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