Logic Masters Deutschland e.V.

• Quattroquadri: Place a digit from 1-9 into each cell so that digits don't repeat in rows, columns, or boxes.
• Regional Constraints: Each constraint type may contain no repeated digits anywhere in the puzzle.
• Tentropy Lines: Every set of 4 adjacent digits on a hollow peach line must contain a digit from each of the X-pair (ten-pair) subsets of {1,9}, {2,8}, {3,7}, and {4,6}. A 5 may not appear on a Tentropy Line. If a Tentropy Line contains fewer than 4 digits, those digits must be from different subsets.
• Renban: Digits on a pink line form a consecutive set of digits in any order.
• Thermo: Digits on a thermometer increase from bulb to tip.
• X: Digits on an X sum to 10.
• V: Digits on a V sum to 5.

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