#include "bitcount.h"
#include "movegen.h"
-#include "notation.h"
#include "position.h"
#include "psqtab.h"
#include "rkiss.h"
#include "thread.h"
#include "tt.h"
+#include "notation.h"
using std::string;
incremented after Black's move.
*/
- char col, row, token;
+ unsigned char col, row, token;
size_t idx;
Square sq = SQ_A8;
std::istringstream ss(fenStr);
// Convert from fullmove starting from 1 to ply starting from 0,
// handle also common incorrect FEN with fullmove = 0.
- gamePly = std::max(2 * (gamePly - 1), 0) + int(sideToMove == BLACK);
+ gamePly = std::max(2 * (gamePly - 1), 0) + (sideToMove == BLACK);
chess960 = isChess960;
thisThread = th;
ss << '-';
ss << (ep_square() == SQ_NONE ? " - " : " " + to_string(ep_square()) + " ")
- << st->rule50 << " " << 1 + (gamePly - int(sideToMove == BLACK)) / 2;
+ << st->rule50 << " " << 1 + (gamePly - (sideToMove == BLACK)) / 2;
return ss.str();
}
-/// Position::pretty() returns an ASCII representation of the position to be
-/// printed to the standard output together with the move's san notation.
+/// Position::pretty() returns an ASCII representation of the position
-const string Position::pretty(Move m) const {
+const string Position::pretty() const {
std::ostringstream ss;
- if (m)
- ss << "\nMove: " << (sideToMove == BLACK ? ".." : "")
- << move_to_san(*const_cast<Position*>(this), m);
-
ss << "\n +---+---+---+---+---+---+---+---+\n";
for (Rank r = RANK_8; r >= RANK_1; --r)
for (Bitboard b = checkers(); b; )
ss << to_string(pop_lsb(&b)) << " ";
- ss << "\nLegal moves: ";
- for (MoveList<LEGAL> it(*this); *it; ++it)
- ss << move_to_san(*const_cast<Position*>(this), *it) << " ";
-
return ss.str();
}
+/// Position::game_phase() calculates the game phase interpolating total non-pawn
+/// material between endgame and midgame limits.
+
+Phase Position::game_phase() const {
+
+ Value npm = st->npMaterial[WHITE] + st->npMaterial[BLACK];
+
+ npm = std::max(EndgameLimit, std::min(npm, MidgameLimit));
+
+ return Phase(((npm - EndgameLimit) * 128) / (MidgameLimit - EndgameLimit));
+}
+
+
/// Position::check_blockers() returns a bitboard of all the pieces with color
/// 'c' that are blocking check on the king with color 'kingColor'. A piece
/// blocks a check if removing that piece from the board would result in a
k ^= Zobrist::enpassant[file_of(st->epSquare)];
}
- if (type_of(m) == PROMOTION)
+ else if (type_of(m) == PROMOTION)
{
PieceType promotion = promotion_type(m);
bool Position::is_draw() const {
- if ( !pieces(PAWN)
- && (non_pawn_material(WHITE) + non_pawn_material(BLACK) <= BishopValueMg))
- return true;
-
if (st->rule50 > 99 && (!checkers() || MoveList<LEGAL>(*this).size()))
return true;