implemented the last details to make everything

work (hopefully)

cpp/src/board.cpp

@@ -292,3 +292,30 @@ bool Board::is_check_for(int8_t colour) const {
     }
     return false;
 }
+
+bool Board::no_legal_moves_for(int8_t colour) const {
+    for (int i = 0; i < 64; i++) {
+        if ((colour_at(i) == White && white_to_play)
+            || (colour_at(i) == Black && !white_to_play)) {
+            if (legal_moves(squares[i] & 0b111, *this, Coords::from_index(i))
+                    .size()
+                > 0)
+                return false;
+        }
+    }
+    return true;
+}
+
+std::vector<Move> Board::all_legal_moves() const {
+    std::vector<Move> ret;
+    for (int i = 0; i < 64; i++) {
+        if ((colour_at(i) == White && white_to_play)
+            || (colour_at(i) == Black && !white_to_play)) {
+            std::vector<Move> moves =
+                legal_moves(squares[i] & 0b111, *this, Coords::from_index(i));
+            if (moves.size() > 0)
+                ret.insert(ret.end(), moves.begin(), moves.end());
+        }
+    }
+    return ret;
+}

cpp/src/board.hpp

@@ -8,7 +8,8 @@
 
 struct Board {
   private:
-    int8_t get_king_of(int8_t colour) const;
+    int8_t get_king_of(int8_t) const;
+    bool no_legal_moves_for(int8_t) const;
 
   public:
     int8_t squares[64] = {Piece::None};
@@ -25,6 +26,21 @@ struct Board {
     std::string to_fen() const;
     bool is_check_for(int8_t) const;
 
+    std::vector<Move> all_legal_moves() const;
+
+    bool is_checkmate_for(int8_t colour) const {
+        return is_checkmate_for(colour) && no_legal_moves_for(colour);
+    }
+
+    bool is_stalemate_for(int8_t colour) const {
+        return !is_checkmate_for(colour) && no_legal_moves_for(colour);
+    }
+
+    bool is_terminal() const {
+        return is_checkmate_for(White) || is_checkmate_for(Black)
+            || is_stalemate_for(White) || is_stalemate_for(Black);
+    }
+
     int8_t colour_at(int8_t idx) const {
         return squares[idx] & 0b11000;
     }