- for (Color c = WHITE; c <= BLACK; ++c)
- for (PieceType pt = PAWN; pt <= KING; ++pt)
- for (int cnt = 0; cnt < pieceCount[c][pt]; ++cnt)
- si->materialKey ^= Zobrist::psq[c][pt][cnt];
+ for (Piece pc : Pieces)
+ {
+ if (type_of(pc) != PAWN && type_of(pc) != KING)
+ si->nonPawnMaterial[color_of(pc)] += pieceCount[pc] * PieceValue[MG][pc];
+
+ for (int cnt = 0; cnt < pieceCount[pc]; ++cnt)
+ si->materialKey ^= Zobrist::psq[pc][cnt];
+ }
+}
+
+
+/// Position::set() is an overload to initialize the position object with
+/// the given endgame code string like "KBPKN". It is manily an helper to
+/// get the material key out of an endgame code. Position is not playable,
+/// indeed is even not guaranteed to be legal.
+
+Position& Position::set(const string& code, Color c, StateInfo* si) {
+
+ assert(code.length() > 0 && code.length() < 8);
+ assert(code[0] == 'K');
+
+ string sides[] = { code.substr(code.find('K', 1)), // Weak
+ code.substr(0, code.find('K', 1)) }; // Strong
+
+ std::transform(sides[c].begin(), sides[c].end(), sides[c].begin(), tolower);
+
+ string fenStr = sides[0] + char(8 - sides[0].length() + '0') + "/8/8/8/8/8/8/"
+ + sides[1] + char(8 - sides[1].length() + '0') + " w - - 0 10";