LMDefault
Default has one puzzle in the Variant Sudoku catalog, most often with Arrow, Region Sum Lines and X-Sums. Every puzzle below links to its original home, so the setter gets the credit and the traffic.
Puzzles here1All 9×9
First puzzle2026Switching circuit
Latest puzzleAug 2026Switching circuit
Logic Masters solves7
On Variant Sudoku
Favourite rules
Puzzles by Default
Newest first. “Play here” opens the puzzle in Variant Sudoku, loaded live from the setter’s own link.
LMIs this you? Claim this page: tell us where we can confirm it’s you, and we’ll link it to you. You can also send a correction or have your puzzles taken out of the catalog.Claim this pageEmail us