With a queen at row 0, column 2, the next row cannot use column 2 or either diagonal column.
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The N-Queens problem places one queen per row while excluding shared columns and diagonals. Experiment with a small example and see each step update.
With a queen at row 0, column 2, the next row cannot use column 2 or either diagonal column.
Read the related guide · · Bookmark this unique URL with Ctrl/Cmd+D.