Logic Masters Deutschland e.V.

This Sudoku puzzle was inspired by Maxwell's puzzling demon, a logic puzzle game designed by muratsubo. The placement and coloring of the killer cages in the puzzle mirror the layout of level 1-16 in this game. That specific layout appears 16 times in the game—often referred to as "IL--" by the community—and has been used to create numerous puzzles in other titles; I wanted to create a similar puzzle within the Sudoku format, which led to the creation of this puzzle.

Rules

Normal Sudoku rules apply. Each row, column, and 3×3 box must contain the digits 1–9 exactly once.

Killer Cages: Digits in each of the four cages must sum to 10 and must not repeat within that cage.Colours have no additional meaning.

X-Sums: Each clue outside the grid gives the sum of the first X cells seen from that direction, where X is the digit in the first cell.

Click the image to play this puzzle.