void ScoreCaptures(MOVES *m) {
int *movep, *valuep;
valuep = m->value;
for (movep = m->move; movep < m->last; movep++)
*valuep++ = MvvLva(m->p, *movep);
}
// 吃子着法生成器，按MVV(LVA)设定分值
int PositionStruct::GenCapMoves(MoveStruct *lpmvs) const {
int i, sqSrc, sqDst, pcCaptured;
int x, y, nSideTag, nOppSideTag;
bool bCanPromote;
SlideMoveStruct *lpsmv;
uint8_t *lpucsqDst, *lpucsqPin;
MoveStruct *lpmvsCurr;
// 生成吃子着法的过程包括以下几个步骤：
lpmvsCurr = lpmvs;
nSideTag = SIDE_TAG(sdPlayer);
nOppSideTag = OPP_SIDE_TAG(sdPlayer);
bCanPromote = PreEval.bPromotion && CanPromote();
// 1. 生成帅(将)的着法
sqSrc = ucsqPieces[nSideTag + KING_FROM];
if (sqSrc != 0) {
__ASSERT_SQUARE(sqSrc);
lpucsqDst = PreGen.ucsqKingMoves[sqSrc];
sqDst = *lpucsqDst;
while (sqDst != 0) {
__ASSERT_SQUARE(sqDst);
// 找到一个着法后，首先判断吃到的棋子是否是对方棋子，技巧是利用"nOppSideTag"的标志(16和32颠倒)，
// 如果是对方棋子，则保存MVV(LVA)值，即如果被吃子无保护，则只记MVV，否则记MVV-LVA(如果MVV>LVA的话)。
pcCaptured = ucpcSquares[sqDst];
if ((pcCaptured & nOppSideTag) != 0) {
__ASSERT(LegalMove(MOVE(sqSrc, sqDst)));
lpmvsCurr->wmv = MOVE(sqSrc, sqDst);
lpmvsCurr->wvl = MvvLva(sqDst, pcCaptured, 5); // 帅(将)的价值是5
lpmvsCurr ++;
}
lpucsqDst ++;
sqDst = *lpucsqDst;
}
}
// 2. 生成仕(士)的着法
for (i = ADVISOR_FROM; i <= ADVISOR_TO; i ++) {
sqSrc = ucsqPieces[nSideTag + i];
if (sqSrc != 0) {
__ASSERT_SQUARE(sqSrc);
lpucsqDst = PreGen.ucsqAdvisorMoves[sqSrc];
sqDst = *lpucsqDst;
while (sqDst != 0) {
__ASSERT_SQUARE(sqDst);
pcCaptured = ucpcSquares[sqDst];
if ((pcCaptured & nOppSideTag) != 0) {
__ASSERT(LegalMove(MOVE(sqSrc, sqDst)));
lpmvsCurr->wmv = MOVE(sqSrc, sqDst);
lpmvsCurr->wvl = MvvLva(sqDst, pcCaptured, 1); // 仕(士)的价值是1
lpmvsCurr ++;
}
lpucsqDst ++;
sqDst = *lpucsqDst;
}
if (bCanPromote && CAN_PROMOTE(sqSrc)) {
lpmvsCurr->wmv = MOVE(sqSrc, sqSrc);
lpmvsCurr->wvl = 0;
lpmvsCurr ++;
}
}
}
// 3. 生成相(象)的着法
for (i = BISHOP_FROM; i <= BISHOP_TO; i ++) {
sqSrc = ucsqPieces[nSideTag + i];
if (sqSrc != 0) {
__ASSERT_SQUARE(sqSrc);
lpucsqDst = PreGen.ucsqBishopMoves[sqSrc];
lpucsqPin = PreGen.ucsqBishopPins[sqSrc];
sqDst = *lpucsqDst;
while (sqDst != 0) {
__ASSERT_SQUARE(sqDst);
if (ucpcSquares[*lpucsqPin] == 0) {
pcCaptured = ucpcSquares[sqDst];
if ((pcCaptured & nOppSideTag) != 0) {
__ASSERT(LegalMove(MOVE(sqSrc, sqDst)));
lpmvsCurr->wmv = MOVE(sqSrc, sqDst);
lpmvsCurr->wvl = MvvLva(sqDst, pcCaptured, 1); // 相(象)的价值是1
lpmvsCurr ++;
}
}
lpucsqDst ++;
sqDst = *lpucsqDst;
lpucsqPin ++;
}
if (bCanPromote && CAN_PROMOTE(sqSrc)) {
lpmvsCurr->wmv = MOVE(sqSrc, sqSrc);
lpmvsCurr->wvl = 0;
lpmvsCurr ++;
}
}
}
// 4. 生成马的着法
for (i = KNIGHT_FROM; i <= KNIGHT_TO; i ++) {
sqSrc = ucsqPieces[nSideTag + i];
if (sqSrc != 0) {
__ASSERT_SQUARE(sqSrc);
lpucsqDst = PreGen.ucsqKnightMoves[sqSrc];
lpucsqPin = PreGen.ucsqKnightPins[sqSrc];
sqDst = *lpucsqDst;
while (sqDst != 0) {
__ASSERT_SQUARE(sqDst);
if (ucpcSquares[*lpucsqPin] == 0) {
pcCaptured = ucpcSquares[sqDst];
if ((pcCaptured & nOppSideTag) != 0) {
__ASSERT(LegalMove(MOVE(sqSrc, sqDst)));
lpmvsCurr->wmv = MOVE(sqSrc, sqDst);
lpmvsCurr->wvl = MvvLva(sqDst, pcCaptured, 3); // 马的价值是3
lpmvsCurr ++;
}
}
lpucsqDst ++;
sqDst = *lpucsqDst;
lpucsqPin ++;
}
}
}
// 5. 生成车的着法
for (i = ROOK_FROM; i <= ROOK_TO; i ++) {
sqSrc = ucsqPieces[nSideTag + i];
if (sqSrc != 0) {
__ASSERT_SQUARE(sqSrc);
x = FILE_X(sqSrc);
y = RANK_Y(sqSrc);
lpsmv = RankMovePtr(x, y);
sqDst = lpsmv->ucRookCap[0] + RANK_DISP(y);
__ASSERT_SQUARE(sqDst);
if (sqDst != sqSrc) {
pcCaptured = ucpcSquares[sqDst];
if ((pcCaptured & nOppSideTag) != 0) {
__ASSERT(LegalMove(MOVE(sqSrc, sqDst)));
lpmvsCurr->wmv = MOVE(sqSrc, sqDst);
lpmvsCurr->wvl = MvvLva(sqDst, pcCaptured, 4); // 车的价值是4
lpmvsCurr ++;
}
}
sqDst = lpsmv->ucRookCap[1] + RANK_DISP(y);
__ASSERT_SQUARE(sqDst);
if (sqDst != sqSrc) {
pcCaptured = ucpcSquares[sqDst];
if ((pcCaptured & nOppSideTag) != 0) {
__ASSERT(LegalMove(MOVE(sqSrc, sqDst)));
lpmvsCurr->wmv = MOVE(sqSrc, sqDst);
lpmvsCurr->wvl = MvvLva(sqDst, pcCaptured, 4); // 车的价值是4
lpmvsCurr ++;
}
}
lpsmv = FileMovePtr(x, y);
sqDst = lpsmv->ucRookCap[0] + FILE_DISP(x);
__ASSERT_SQUARE(sqDst);
if (sqDst != sqSrc) {
pcCaptured = ucpcSquares[sqDst];
if ((pcCaptured & nOppSideTag) != 0) {
__ASSERT(LegalMove(MOVE(sqSrc, sqDst)));
lpmvsCurr->wmv = MOVE(sqSrc, sqDst);
lpmvsCurr->wvl = MvvLva(sqDst, pcCaptured, 4); // 车的价值是4
lpmvsCurr ++;
}
}
sqDst = lpsmv->ucRookCap[1] + FILE_DISP(x);
__ASSERT_SQUARE(sqDst);
if (sqDst != sqSrc) {
pcCaptured = ucpcSquares[sqDst];
if ((pcCaptured & nOppSideTag) != 0) {
__ASSERT(LegalMove(MOVE(sqSrc, sqDst)));
lpmvsCurr->wmv = MOVE(sqSrc, sqDst);
lpmvsCurr->wvl = MvvLva(sqDst, pcCaptured, 4); // 车的价值是4
lpmvsCurr ++;
}
}
}
}
// 6. 生成炮的着法
for (i = CANNON_FROM; i <= CANNON_TO; i ++) {
sqSrc = ucsqPieces[nSideTag + i];
if (sqSrc != 0) {
__ASSERT_SQUARE(sqSrc);
x = FILE_X(sqSrc);
y = RANK_Y(sqSrc);
lpsmv = RankMovePtr(x, y);
sqDst = lpsmv->ucCannonCap[0] + RANK_DISP(y);
__ASSERT_SQUARE(sqDst);
if (sqDst != sqSrc) {
pcCaptured = ucpcSquares[sqDst];
if ((pcCaptured & nOppSideTag) != 0) {
__ASSERT(LegalMove(MOVE(sqSrc, sqDst)));
lpmvsCurr->wmv = MOVE(sqSrc, sqDst);
lpmvsCurr->wvl = MvvLva(sqDst, pcCaptured, 3); // 炮的价值是3
lpmvsCurr ++;
}
}
sqDst = lpsmv->ucCannonCap[1] + RANK_DISP(y);
__ASSERT_SQUARE(sqDst);
if (sqDst != sqSrc) {
pcCaptured = ucpcSquares[sqDst];
if ((pcCaptured & nOppSideTag) != 0) {
__ASSERT(LegalMove(MOVE(sqSrc, sqDst)));
lpmvsCurr->wmv = MOVE(sqSrc, sqDst);
lpmvsCurr->wvl = MvvLva(sqDst, pcCaptured, 3); // 炮的价值是3
lpmvsCurr ++;
}
}
lpsmv = FileMovePtr(x, y);
sqDst = lpsmv->ucCannonCap[0] + FILE_DISP(x);
__ASSERT_SQUARE(sqDst);
if (sqDst != sqSrc) {
pcCaptured = ucpcSquares[sqDst];
if ((pcCaptured & nOppSideTag) != 0) {
__ASSERT(LegalMove(MOVE(sqSrc, sqDst)));
lpmvsCurr->wmv = MOVE(sqSrc, sqDst);
lpmvsCurr->wvl = MvvLva(sqDst, pcCaptured, 3); // 炮的价值是3
lpmvsCurr ++;
}
}
sqDst = lpsmv->ucCannonCap[1] + FILE_DISP(x);
__ASSERT_SQUARE(sqDst);
if (sqDst != sqSrc) {
pcCaptured = ucpcSquares[sqDst];
if ((pcCaptured & nOppSideTag) != 0) {
__ASSERT(LegalMove(MOVE(sqSrc, sqDst)));
lpmvsCurr->wmv = MOVE(sqSrc, sqDst);
lpmvsCurr->wvl = MvvLva(sqDst, pcCaptured, 3); // 炮的价值是3
lpmvsCurr ++;
}
}
}
}
// 7. 生成兵(卒)的着法
for (i = PAWN_FROM; i <= PAWN_TO; i ++) {
sqSrc = ucsqPieces[nSideTag + i];
if (sqSrc != 0) {
__ASSERT_SQUARE(sqSrc);
lpucsqDst = PreGen.ucsqPawnMoves[sdPlayer][sqSrc];
sqDst = *lpucsqDst;
while (sqDst != 0) {
__ASSERT_SQUARE(sqDst);
pcCaptured = ucpcSquares[sqDst];
if ((pcCaptured & nOppSideTag) != 0) {
__ASSERT(LegalMove(MOVE(sqSrc, sqDst)));
lpmvsCurr->wmv = MOVE(sqSrc, sqDst);
lpmvsCurr->wvl = MvvLva(sqDst, pcCaptured, 2); // 兵(卒)的价值是2
lpmvsCurr ++;
}
lpucsqDst ++;
sqDst = *lpucsqDst;
}
}
}
return lpmvsCurr - lpmvs;
}
