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Returns a knight's tour ending at a particular square. Represents the squares by their coordinates with the tuple \((x,y)\), where \(1 \leq x \leq N\) and \(1 \leq y \leq N\). A tour will be a list of these tuples of length \(N \times N\).

The same as knightsTour, except return a circular tour. I.e., the knight must be able to jump from the last position in the tour to the first position in the tour. Starts the tour from \((1,1)\).