+ static IsGoodPosition(position) {
+ if (position.length == 0) return false;
+ const rows = position.split("/");
+ if (rows.length != V.size.x) return false;
+ // At most and at least one king or queen per color
+ let royals = { "k": 0, "K": 0, "q": 0, "Q": 0 };
+ for (let row of rows) {
+ let sumElts = 0;
+ for (let i = 0; i < row.length; i++) {
+ if (['K','k','Q','q'].includes(row[i])) royals[row[i]]++;
+ if (V.PIECES.includes(row[i].toLowerCase())) sumElts++;
+ else {
+ const num = parseInt(row[i], 10);
+ if (isNaN(num)) return false;
+ sumElts += num;
+ }
+ }
+ if (sumElts != V.size.y) return false;
+ }
+ if (
+ Object.values(royals).some(v => v >= 2) ||
+ royals['K'] + royals['Q'] == 0 ||
+ royals['k'] + royals['q'] == 0
+ ) {
+ return false;
+ }
+ return true;
+ }
+
+ scanKings() {}
+