Logic Masters Deutschland e.V.

Evil Six Six Entropy

Rules

• Normal latin square rules apply
• No-repeat quads: In the 2x2 square of cells centered around a circle digits cannot repeat and must include its cue
• Renban: Digits cannot repeat on the line
• Global entropy: Every 2x2 square of cells (not limited to those centered around a circle) must include at least one low (1 or 2), one mid (3 or 4) and one high (5 or 6) digit

Sudokupad link

There are some secrets tied to the ruleset to be discovered before knowing where to get started.

Have fun :)