/*
*******************************************************************************
* *
* configuration information: the following variables need to be set to *
* indicate the machine configuration/capabilities. *
* *
* UNIX: define this if the program is being run on a unix-based system, *
* which causes the executable to use unix-specific runtime utilities. *
* *
* CPUS=N: this sets up data structures to the appropriate size to support *
* up to N simultaneous search engines. note that you can set this to a *
* value larger than the max processors you currently have, because the mt=n *
* command (added to the command line or your crafty.rc/.craftyrc file) will *
* control how many threads are actually spawned. *
* *
*******************************************************************************
*/
/* *INDENT-OFF* */
#if defined(AFFINITY)
# define _GNU_SOURCE
# include <sched.h>
#endif
#if defined(UNIX)
# define _GNU_SOURCE
# if (CPUS > 1)
# include <pthread.h>
# endif
# include <unistd.h>
# include <sys/types.h>
# include <sys/stat.h>
#endif
#include <stdint.h>
#include <inttypes.h>
#include <time.h>
#include <stdio.h>
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#if !defined(TYPES_INCLUDED)
# define TYPES_INCLUDED
# if !defined (UNIX)
# define RESTRICT __restrict
# else
# define RESTRICT
# endif
# if !defined(CPUS)
# define CPUS 1
# endif
# if !defined(UNIX)
# include <windows.h>
# include <process.h>
# endif
# define CDECL
# define STDCALL
/* Provide reasonable defaults for UNIX systems. */
# if !defined(UNIX)
# undef STDCALL
# define STDCALL __stdcall
# ifdef VC_INLINE32
# undef CDECL
# define CDECL __cdecl
# endif
# endif
# if !defined(BOOKDIR)
# define BOOKDIR "."
# endif
# if !defined(LOGDIR)
# define LOGDIR "."
# endif
# if !defined(TBDIR)
# define TBDIR "./TB"
# endif
# if !defined(RCDIR)
# define RCDIR "."
# endif
# include "lock.h"
# define MAXPLY 129
# define MAX_TC_NODES 3000000
# define MAX_BLOCKS 64 * CPUS
# define BOOK_CLUSTER_SIZE 8000
# define MERGE_BLOCK 1000
# define SORT_BLOCK 4000000
# define LEARN_INTERVAL 10
# define LEARN_COUNTER_BAD -80
# define LEARN_COUNTER_GOOD +100
# define MATE 32768
# define PAWN_VALUE 100
# define KNIGHT_VALUE 305
# define BISHOP_VALUE 305
# define ROOK_VALUE 490
# define QUEEN_VALUE 1000
# define KING_VALUE 40000
# if !defined(CLOCKS_PER_SEC)
# define CLOCKS_PER_SEC 1000000
# endif
typedef enum {
A1, B1, C1, D1, E1, F1, G1, H1,
A2, B2, C2, D2, E2, F2, G2, H2,
A3, B3, C3, D3, E3, F3, G3, H3,
A4, B4, C4, D4, E4, F4, G4, H4,
A5, B5, C5, D5, E5, F5, G5, H5,
A6, B6, C6, D6, E6, F6, G6, H6,
A7, B7, C7, D7, E7, F7, G7, H7,
A8, B8, C8, D8, E8, F8, G8, H8,
BAD_SQUARE
} squares;
typedef enum { FILEA, FILEB, FILEC, FILED, FILEE, FILEF, FILEG, FILEH } files;
typedef enum { RANK1, RANK2, RANK3, RANK4, RANK5, RANK6, RANK7, RANK8 } ranks;
typedef enum { empty = 0, occupied = 0, pawn = 1, knight = 2, bishop = 3,
rook = 4, queen = 5, king = 6
} PIECE;
typedef enum { black = 0, white = 1 } COLOR;
typedef enum { mg = 0, eg = 1 } PHASE;
typedef enum { empty_v = 0, pawn_v = 1, knight_v = 3,
bishop_v = 3, rook_v = 5, queen_v = 9, king_v = 99
} PIECE_V;
typedef enum { serial = 0, parallel = 1} SEARCH_MODE;
typedef enum { think = 1, puzzle = 2, book = 3, annotate = 4 } SEARCH_TYPE;
typedef enum { normal_mode, tournament_mode } PLAYING_MODE;
typedef struct {
int8_t castle[2];
uint8_t enpassant_target;
uint8_t reversible;
} SEARCH_POSITION;
typedef struct {
int move1;
int move2;
} KILLER;
typedef struct {
uint64_t pieces[7];
} BB_PIECES;
typedef struct {
BB_PIECES color[2];
uint64_t hash_key;
uint64_t pawn_hash_key;
int material_evaluation;
int kingsq[2];
int8_t board[64];
char pieces[2][7];
char total_all_pieces;
} POSITION;
typedef struct {
uint64_t word1;
uint64_t word2;
} HASH_ENTRY;
typedef struct {
uint64_t key;
int32_t score_mg, score_eg;
unsigned char defects_k[2];
unsigned char defects_m[2];
unsigned char defects_q[2];
unsigned char passed[2];
} PAWN_HASH_ENTRY;
typedef struct {
uint64_t entry[3];
} PXOR;
typedef struct {
int path[MAXPLY];
int pathh;
int pathl;
int pathd;
int pathv;
} PATH;
typedef struct {
uint64_t path_sig;
int hash_pathl;
int hash_path_age;
int hash_path_moves[MAXPLY];
} HPATH_ENTRY;
typedef struct {
int phase;
int order;
int remaining;
unsigned *last;
unsigned done[10];
unsigned *exclude;
} NEXT_MOVE;
/*
root_move.status:
xxx1 = failed low this iteration
xx1x = failed high this iteration
x1xx = don't search in parallel or reduce
1xxx = move has been searched
*/
typedef struct {
int move;
unsigned status;
int bm_age;
PATH path;
} ROOT_MOVE;
# if !defined(UNIX)
# pragma pack(4)
# endif
typedef struct {
uint64_t position;
unsigned status_played;
float learn;
} BOOK_POSITION;
# if !defined(UNIX)
# pragma pack()
# endif
typedef struct {
unsigned char position[8];
unsigned char status;
unsigned char percent_play;
} BB_POSITION;
struct personality_term {
char *description;
int type;
int size;
void *value;
};
struct autotune {
unsigned int min;
unsigned int max;
unsigned int increment;
char description[64];
char command[16];
unsigned int *parameter;
};
typedef struct tree {
/* commonly used variables */
SEARCH_POSITION status[MAXPLY + 3];
NEXT_MOVE next_status[MAXPLY];
KILLER killers[MAXPLY];
POSITION position;
uint64_t save_hash_key[MAXPLY + 3];
uint64_t save_pawn_hash_key[MAXPLY + 3];
uint64_t rep_list[256];
int curmv[MAXPLY];
int phase[MAXPLY];
int hash_move[MAXPLY];
unsigned *last[MAXPLY];
unsigned move_list[5120];
PATH pv[MAXPLY];
/* variables used by Evaluate() */
PAWN_HASH_ENTRY pawn_score;
int tropism[2];
int dangerous[2];
uint64_t all_pawns;
int score_mg, score_eg;
/* statistical counters */
uint64_t nodes_searched;
uint64_t fail_highs;
uint64_t fail_high_first_move;
uint64_t evaluations;
uint64_t egtb_probes;
uint64_t egtb_hits;
uint64_t extensions_done;
uint64_t qchecks_done;
uint64_t moves_fpruned;
uint64_t moves_mpruned;
uint64_t LMR_done[16];
uint64_t null_done[16];
/* thread stuff */
lock_t lock;
int thread_id;
volatile int joinable;
volatile int joined;
volatile int stop;
volatile int nprocs;
int alpha;
int beta;
volatile int value;
int wtm;
int depth;
int ply;
int in_check;
int *searched;
int cutmove;
struct tree *volatile siblings[CPUS], *parent;
/* rarely accessed */
char root_move_text[16];
char remaining_moves_text[16];
} TREE;
typedef struct thread {
TREE *tree;
uint64_t blocks;
uint64_t max_blocks;
unsigned int idle;
volatile unsigned int terminate;
char filler[40];
} THREAD;
/*
DO NOT modify these. these are constants, used in multiple modules.
modification may corrupt the search in any number of ways, all bad.
*/
# define WORTHLESS 0
# define UPPER 1
# define LOWER 2
# define EXACT 3
# define HASH_MISS 0
# define HASH_HIT 1
# define AVOID_NULL_MOVE 2
# define NO_NULL 0
# define DO_NULL 1
# define NONE 0
# define NULL_MOVE 1
# define DO_NOT_REDUCE 1
# define HASH 2
# define GENERATE_CAPTURES 3
# define CAPTURES 4
# define KILLER1 5
# define KILLER2 6
# define KILLER3 7
# define KILLER4 8
# define COUNTER_MOVE1 9
# define COUNTER_MOVE2 10
# define MOVE_PAIR1 11
# define MOVE_PAIR2 12
# define GENERATE_QUIET 13
# define HISTORY 14
# define REMAINING 15
# define EVALUATION 16
# define ILLEGAL 0
# define LEGAL 1
# define IN_WINDOW 2
# define FAIL_HIGH 3
#if /*defined(UNIX) &&*/ !defined(INLINEASM) // Pierre-Marie Baty -- we also use them on Windows...
int CDECL PopCnt(uint64_t);
int CDECL MSB(uint64_t);
int CDECL LSB(uint64_t);
#endif
void AlignedMalloc(void **, int, size_t);
void AlignedRemalloc(void **, int, size_t);
void Analyze(void);
void Annotate(void);
void AnnotateHeaderHTML(char *, FILE *);
void AnnotateFooterHTML(FILE *);
void AnnotatePositionHTML(TREE *RESTRICT, int, FILE *);
char *AnnotateVtoNAG(int, int, int, int);
void AnnotateHeaderTeX(FILE *);
void AnnotateFooterTeX(FILE *);
void AnnotatePositionTeX(TREE *, int, FILE *);
uint64_t atoiKMB(char *);
int Attacks(TREE *RESTRICT, int, int);
uint64_t Attacked(TREE *RESTRICT, int, uint64_t);
uint64_t AttacksFrom(TREE *RESTRICT, int, int);
uint64_t AttacksTo(TREE *RESTRICT, int);
void AutoTune(int, char **);
int Bench(int, int);
int Bench_PGO(int, int);
int Book(TREE *RESTRICT, int);
void BookClusterIn(FILE *, int, BOOK_POSITION *);
void BookClusterOut(FILE *, int, BOOK_POSITION *);
int BookIn32(unsigned char *);
float BookIn32f(unsigned char *);
uint64_t BookIn64(unsigned char *);
int BookMask(char *);
unsigned char *BookOut32(int);
unsigned char *BookOut32f(float);
unsigned char *BookOut64(uint64_t);
int BookPonderMove(TREE *RESTRICT, int);
void Bookup(TREE *RESTRICT, int, char **);
void BookSort(BB_POSITION *, int, int);
int BookupCompare(const void *, const void *);
BB_POSITION BookupNextPosition(int, int);
int CheckInput(void);
void ClearHashTableScores(void);
int ComputeDifficulty(int, int);
void CopyFromParent(TREE *RESTRICT);
void CopyToParent(TREE *RESTRICT, TREE *RESTRICT, int);
void CraftyExit(int);
void DisplayArray(int *, int);
void DisplayArrayX2(int *, int *, int);
void DisplayBitBoard(uint64_t);
void Display2BitBoards(uint64_t, uint64_t);
void DisplayChessBoard(FILE *, POSITION);
char *DisplayEvaluation(int, int);
char *DisplayEvaluationKibitz(int, int);
void DisplayFT(int, int, int);
char *DisplayHHMM(unsigned);
char *DisplayHHMMSS(unsigned);
char *DisplayKMB(uint64_t, int);
void DisplayFail(TREE *RESTRICT, int, int, int, int, int, int, int);
char *DisplayPath(TREE *RESTRICT, int, PATH *);
void DisplayPV(TREE *RESTRICT, int, int, int, PATH *, int);
char *DisplayTime(unsigned);
char *Display2Times(unsigned);
char *DisplayTimeKibitz(unsigned);
void DisplayChessMove(char *, int);
int Drawn(TREE *RESTRICT, int);
void Edit(void);
# if !defined(NOEGTB)
int EGTBProbe(TREE *RESTRICT, int, int, int *);
void EGTBPV(TREE *RESTRICT, int);
# endif
int Evaluate(TREE *RESTRICT, int, int, int, int);
void EvaluateBishops(TREE *RESTRICT, int);
void EvaluateCastling(TREE *RESTRICT, int, int);
int EvaluateDraws(TREE *RESTRICT, int, int, int);
int EvaluateHasOpposition(int, int, int);
void EvaluateKing(TREE *RESTRICT, int, int);
int EvaluateKingsFile(TREE * RESTRICT, int, int, int);
void EvaluateKnights(TREE *RESTRICT, int);
void EvaluateMate(TREE *RESTRICT, int);
void EvaluateMaterial(TREE *RESTRICT, int);
void EvaluatePassedPawns(TREE *RESTRICT, int, int);
void EvaluatePassedPawnRaces(TREE *RESTRICT, int);
void EvaluatePawns(TREE *RESTRICT, int);
void EvaluateQueens(TREE *RESTRICT, int);
void EvaluateRooks(TREE *RESTRICT, int);
int EvaluateWinningChances(TREE *RESTRICT, int, int);
void EVTest(char *);
int Exclude(TREE *RESTRICT, int, int);
int FindBlockID(TREE *RESTRICT);
char *FormatPV(TREE *RESTRICT, int, PATH);
int FTbSetCacheSize(void *, unsigned long);
int GameOver(int);
unsigned *GenerateCaptures(TREE *RESTRICT, int, int, unsigned *);
unsigned *GenerateCheckEvasions(TREE *RESTRICT, int, int, unsigned *);
unsigned *GenerateChecks(TREE *RESTRICT, int, unsigned *);
unsigned *GenerateNoncaptures(TREE *RESTRICT, int, int, unsigned *);
TREE *GetBlock(TREE *, int);
void Initialize(void);
void InitializeAttackBoards(void);
void InitializeChessBoard(TREE *);
int InitializeGetLogID();
void InitializeHashTables(int);
void InitializeKillers(void);
void InitializeKingSafety(void);
void InitializeMagic(void);
uint64_t InitializeMagicBishop(int, uint64_t);
uint64_t InitializeMagicRook(int, uint64_t);
uint64_t InitializeMagicOccupied(int *, int, uint64_t);
void InitializeMasks(void);
void InitializePawnMasks(void);
void InitializeReductions(void);
void InitializeSMP(void);
int IInitializeTb(char *);
int InputMove(TREE *RESTRICT, int, int, int, int, char *);
int InputMoveICS(TREE *RESTRICT, int, int, int, int, char *);
uint64_t InterposeSquares(int, int, int);
void Interrupt(int);
int InvalidPosition(TREE *RESTRICT);
int Iterate(int, int, int);
int Join(int64_t);
void Kibitz(int, int, int, int, int, uint64_t, int, int, char *);
void History(TREE *RESTRICT, int, int, int, int, int*);
int KingPawnSquare(int, int, int, int);
int LearnAdjust(int);
void LearnBook(void);
int LearnFunction(int, int, int, int);
void LearnValue(int, int);
void MakeMove(TREE *RESTRICT, int, int, int);
void MakeMoveRoot(TREE *RESTRICT, int, int);
void NewGame(int);
int NextMove(TREE *RESTRICT, int, int, int, int);
int NextRootMove(TREE *RESTRICT, TREE *RESTRICT, int);
int NextRootMoveParallel(void);
void NextSort(TREE *RESTRICT, int);
int Option(TREE *RESTRICT);
int OptionMatch(char *, char *);
void OptionPerft(TREE *RESTRICT, int, int, int);
void Output(TREE *RESTRICT);
char *OutputMove(TREE *RESTRICT, int, int, int);
int ParseTime(char *);
void Pass(void);
int PinnedOnKing(TREE *RESTRICT, int, int);
int Ponder(int);
void Print(int, char *, ...);
int HashProbe(TREE *RESTRICT, int, int, int, int, int, int*);
void HashStore(TREE *RESTRICT, int, int, int, int, int, int);
void HashStorePV(TREE *RESTRICT, int, int);
int Quiesce(TREE *RESTRICT, int, int, int, int, int);
int QuiesceEvasions(TREE *RESTRICT, int, int, int, int);
unsigned Random32(void);
uint64_t Random64(void);
int Read(int, char *);
int ReadChessMove(TREE *RESTRICT, FILE *, int, int);
void ReadClear(void);
unsigned ReadClock(void);
int ReadPGN(FILE *, int);
int ReadNextMove(TREE *RESTRICT, char *, int, int);
int ReadParse(char *, char *args[], char *);
int ReadInput(void);
int Repeat(TREE *RESTRICT, int);
int Repeat3x(TREE *RESTRICT);
void ResignOrDraw(TREE *RESTRICT, int);
void RestoreGame(void);
void RootMoveList(int);
int Search(TREE *RESTRICT, int, int, int, int, int, int, int);
int SearchMove(TREE *RESTRICT, int, int, int, int, int, int, int, int, int);
int SearchMoveList(TREE *RESTRICT, int, int, int, int, int, int *, int, int, int);
int SearchNull(TREE * RESTRICT, int, int, int, int);
void Trace(TREE *RESTRICT, int, int, int, int, int, const char *, int, int, int);
void SetBoard(TREE *, int, char **, int);
void SetChessBitBoards(TREE *);
void SharedFree(void *address);
void SortRootMoves(void);
int Split(TREE *RESTRICT);
int StrCnt(char *, char);
int SEE(TREE *RESTRICT, int, int);
int SEEO(TREE *RESTRICT, int, int);
void Test(char *, FILE *, int, int);
void TestEPD(char *, FILE *, int, int);
void ThreadAffinity(int);
void *STDCALL ThreadInit(void *);
# if !defined(UNIX)
void ThreadMalloc(int64_t);
# endif
int ThreadSplit(TREE *RESTRICT, int, int, int, int, int);
void ThreadStop(TREE *RESTRICT);
void ThreadTrace(TREE * RESTRICT, int, int);
int ThreadWait(int, TREE *RESTRICT);
int Threat(TREE *, int, int, int, int);
void TimeAdjust(int, int);
int TimeCheck(TREE *RESTRICT, int);
void TimeSet(int);
void UnmakeMove(TREE *RESTRICT, int, int, int);
int ValidMove(TREE *RESTRICT, int, int, int);
int VerifyMove(TREE *RESTRICT, int, int, int);
void ValidatePosition(TREE *RESTRICT, int, int, char *);
void WaitForAllThreadsInitialized(void);
# if !defined(UNIX)
extern void *WinMallocInterleaved(size_t, int);
extern void WinFreeInterleaved(void *, size_t);
# define MallocInterleaved(cBytes, cThreads) \
WinMallocInterleaved(cBytes, cThreads)
# define FreeInterleaved(pMemory, cBytes) \
WinFreeInterleaved(pMemory, cBytes)
# else
# if defined(NUMA)
# define MallocInterleaved(cBytes, cThreads) numa_alloc_interleaved(cBytes)
# define FreeInterleaved(pMemory, cBytes) numa_free(pMemory, 1)
# else
# define MallocInterleaved(cBytes, cThreads) malloc(cBytes)
# define FreeInterleaved(pMemory, cBytes) free(pMemory)
# endif
# endif
# define Abs(a) (((a) > 0) ? (a) : -(a))
# define Max(a,b) (((a) > (b)) ? (a) : (b))
# define Min(a,b) (((a) < (b)) ? (a) : (b))
# define Sign(a) ((a) < 0 ? -1 : +1)
# define FileDistance(a,b) abs(File(a) - File(b))
# define RankDistance(a,b) abs(Rank(a) - Rank(b))
# define Distance(a,b) Max(FileDistance(a,b), RankDistance(a,b))
# define DrawScore(side) (draw_score[side])
# define PopCnt8Bit(a) (pop_cnt_8bit[a])
# define MSB8Bit(a) (msb_8bit[a])
# define LSB8Bit(a) (lsb_8bit[a])
# define HistoryIndex(side, m) ((side << 9) + (Piece(m) << 6) + To(m))
/*
side = side to move
mptr = pointer into move list
m = bit vector of to squares to unpack
t = pre-computed from + moving piece
*/
# define Extract(side, mptr, m, t) \
for ( ; m ; Clear(to, m)) { \
to = MostAdvanced(side, m); \
*mptr++ = t | (to << 6) | (Abs(PcOnSq(to)) << 15); \
}
# define Check(side) Attacks(tree, Flip(side), KingSQ(side))
# define Attack(from,to) (!(intervening[from][to] & OccupiedSquares))
# define BishopAttacks(square, occ) *(magic_bishop_indices[square]+((((occ)&magic_bishop_mask[square])*magic_bishop[square])>>magic_bishop_shift[square]))
# define BishopMobility(square, occ) *(magic_bishop_mobility_indices[square]+((((occ)&magic_bishop_mask[square])*magic_bishop[square])>>magic_bishop_shift[square]))
# define KingAttacks(square) king_attacks[square]
# define KnightAttacks(square) knight_attacks[square]
# define PawnAttacks(side, square) pawn_attacks[side][square]
# define Reversible(p) (tree->status[p].reversible)
# define RookAttacks(square, occ) *(magic_rook_indices[square]+((((occ)&magic_rook_mask[square])*magic_rook[square])>>magic_rook_shift[square]))
# define RookMobility(square, occ) *(magic_rook_mobility_indices[square]+((((occ)&magic_rook_mask[square])*magic_rook[square])>>magic_rook_shift[square]))
# define QueenAttacks(square, occ) (BishopAttacks(square, occ)|RookAttacks(square, occ))
# define Rank(x) ((x)>>3)
# define File(x) ((x)&7)
# define Flip(x) ((x)^1)
# define MostAdvanced(side, squares) ((side) ? MSB(squares) : LSB(squares))
# define LeastAdvanced(side, squares) ((side) ? LSB(squares) : MSB(squares))
# define MinMax(side, v1, v2) ((side) ? Min((v1), (v2)) : Max((v1), (v2)))
# define InFront(side, k, p) ((side) ? k > p : k < p)
# define Behind(side, k, p) ((side) ? k < p : k > p)
# define Passed(sq, wtm) (!(mask_passed[wtm][sq] & Pawns(Flip(wtm))))
# define RankAttacks(a) (RookAttacks(a, OccupiedSquares) & rank_mask[Rank(a)])
# define FileAttacks(a) (RookAttacks(a, OccupiedSquares) & file_mask[File(a)])
# define Diaga1Attacks(a) (BishopAttacks(a, OccupiedSquares) & (plus9dir[a] | minus9dir[a]))
# define Diagh1Attacks(a) (BishopAttacks(a, OccupiedSquares) & (plus7dir[a] | minus7dir[a]))
# define InterposeSquares(kingsq, checksq) intervening[kingsq][checksq]
/*
the following macros are used to extract the pieces of a move that are
kept compressed into the rightmost 21 bits of a simple integer.
*/
# define From(a) ((a) & 63)
# define To(a) (((a)>>6) & 63)
# define Piece(a) (((a)>>12) & 7)
# define Captured(a) (((a)>>15) & 7)
# define Promote(a) (((a)>>18) & 7)
# define Move(a) (a & 0x1fffff)
# define SortV(a) (a >> 21)
# define CaptureOrPromote(a) (((a)>>15) & 63)
# define PawnPush(c, a) (Piece(a) == pawn && \
rankflip[c][Rank(To(a))] >= RANK6 \
&& !(mask_passed[c][To(a)] & \
Pawns(Flip(c))))
# define CastleMove(c, a) (Piece(a) == king && Abs(File(To(a)) - \
File(From(a))) > 1)
# define SetMask(a) (set_mask[a])
# define ClearMask(a) (clear_mask[a])
# define Pawns(c) (tree->position.color[c].pieces[pawn])
# define Knights(c) (tree->position.color[c].pieces[knight])
# define Bishops(c) (tree->position.color[c].pieces[bishop])
# define Rooks(c) (tree->position.color[c].pieces[rook])
# define Queens(c) (tree->position.color[c].pieces[queen])
# define Kings(c) (tree->position.color[c].pieces[king])
# define KingSQ(c) (tree->position.kingsq[c])
# define Occupied(c) (tree->position.color[c].pieces[occupied])
# define Pieces(c, p) (tree->position.color[c].pieces[p])
# define TotalPieces(c, p) (tree->position.pieces[c][p])
# define PieceValues(c, p) (piece_values[c][p])
# define TotalAllPieces (tree->position.total_all_pieces)
# define Material (tree->position.material_evaluation)
# define MaterialSTM(side) ((side) ? Material : -Material)
# define MateScore(s) (Abs(s) > 32000)
# define Castle(ply, c) (tree->status[ply].castle[c])
# define HashKey (tree->position.hash_key)
# define PawnHashKey (tree->position.pawn_hash_key)
# define EnPassant(ply) (tree->status[ply].enpassant_target)
# define EnPassantTarget(ply) (EnPassant(ply) ? SetMask(EnPassant(ply)) : 0)
# define PcOnSq(sq) (tree->position.board[sq])
# define OccupiedSquares (Occupied(white) | Occupied(black))
# define Color(square) (square_color[square] ? dark_squares : ~dark_squares)
# define SideToMove(c) ((c) ? "White" : "Black")
/*
the following macros are used to Set and Clear a specific bit in the
second argument. this is done to make the code more readable, rather
than to make it faster.
*/
# define ClearSet(a,b) b=((a) ^ (b))
# define Clear(a,b) b=ClearMask(a) & (b)
# define Set(a,b) b=SetMask(a) | (b)
/*
the following macros are used to update the hash signatures.
*/
# define Hash(stm,piece,square) (HashKey^=randoms[stm][piece][square])
# define HashP(stm,square) (PawnHashKey^=randoms[stm][pawn][square])
# define HashCastle(stm,direction) (HashKey^=castle_random[stm][direction])
# define HashEP(sq) (HashKey^=enpassant_random[sq])
# define SavePV(tree,ply,ph) do { \
tree->pv[ply-1].path[ply-1]=tree->curmv[ply-1]; \
tree->pv[ply-1].pathl=ply; \
tree->pv[ply-1].pathh=ph; \
tree->pv[ply-1].pathd=iteration;} while(0)
# if defined(INLINEASM)
# include "inline.h"
# endif
#endif
/* *INDENT-ON* */