Now, hoping that you have tried by yourself, here is the Java code. ![]() Note: Before reading the Code, we recommend that you must try to come up with the solution on your own. ![]() Whenever a new capture is made or a pawn makes a move, this countdown gets reset. Chess does have a rule known as the 50 moves rule, but the countdown is from the last capture or the last pawn move, not from the time when a player has only one king left. And after printing, we will make the current cell back to 0 (empty), as we are backtracking (to print all possible configurations), and then return. There is no rule in Chess to this effect. the current move is equal to n 2 where n = size of grid.īut before printing, we should fill the current cell with the last move (= n^2). We will print the current configuration when we have already visited all the cells exactly once, i.e. Now, the only condition left is the base case? Thus these are the checks to find whether the current cell is an invalid move or not: Hence, we will also return (invalid configuration), if the current cell is already filled with value > 0 (a move number). This is because we are not allowed to visit any cell twice, i.e. whether the value of the row or column has gone out of bound or not (= size of grid).Īlso, the current move can be invalid if it had been already visited in any of the previous moves. ![]() If the current cell is (r, c), then we will try for all possible 8 moves (in clockwise direction), i.e.
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