Rooted: Created page with "'''Butterfly''' is a dense gattai with only 4 overlapping Sudoku grids, with 12 overlapping boxes, 4 of them overlap 4 times! Only 4 boxes do not overlap. It..."

2022-01-20T03:41:56Z

Created page with "'''Butterfly''' is a dense gattai with only 4 overlapping Sudoku grids, with 12 overlapping boxes, 4 of them overlap 4 times! Only 4 boxes do not overlap. It..."

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'''Butterfly''' is a dense [[gattai]] with only 4 overlapping [[Sudoku]] [[grid]]s, with 12 overlapping [[box]]es, 4 of them overlap 4 times! Only 4 boxes do not overlap.

It it not possible to generate a [[valid]] puzzle without placing [[given]]s in the overlapping boxes.

=== Example ===

[[Image:butterfly-example.png]]

[[Category:Gattai Variants]]
[[Category:Sudoku Variants]]

Butterfly - Revision history

Rooted: Created page with "'''Butterfly''' is a dense gattai with only 4 overlapping Sudoku grids, with 12 overlapping boxes, 4 of them overlap 4 times! Only 4 boxes do not overlap. It..."