Logic Masters Deutschland e.V.

Normal sudoku rules apply: Place digits 1-9 once each in every row, column and box.

Column indexers (1,4,7): Each digit in column 1 indicates the column where 1 appears in the row. Similar rule applies for each digit in columns 4 and 7. For example, if R3C4 is 8, then R3C8 is 4.

Row indexers (1,4,7): Each digit in row 1 indicates the row where 1 appears in the column. Similar rule applies for each digit in rows 4 and 7. For example, if R7C2 is 9, then R9C2 is 7.

3-modular line: Every set of three sequential digits along the green line must contain a complete set of residues modulo 3, i.e. one digit from {1,4,7}, one from {2,5,8}, and one from {3,6,9}.

Thermometer: Digits on a thermometer must strictly increase as they move away from the bulb.

Have fun and God bless.

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