hasItemAt method
Whether there is a valid item at pos
Implementation
bool hasItemAt(ChessPos pos, {int team = -1}) {
String item = _rows[pos.y][pos.x];
if (item == '0') {
return false;
}
if (team < 0) {
return true;
}
if ((team == 0 && item.codeUnitAt(0) < ChessFen.colIndexBase) ||
(team == 1 && item.codeUnitAt(0) >= ChessFen.colIndexBase)) {
return true;
}
return false;
}