Rules Draw some loops, each visiting all instances of exactly one clue. Between them, the loops visit all cells of the grid. Some cells have already been fully drawn for you. Loops may cross over themselves and each other, but only when the cell contains neither turns nor a clue and the overlap has no length. Loops are only made out of horizontal and vertical line segments which go through the centres of every containing cell.
Index to One Sudoku by Philip Newman
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(This post is part of the Genuinely Approachable Sudoku (GAS) series.) In
an Index to One Sudoku, outside clues point you to cells that in turn tell
you ...
8 hours ago
