Logic Masters Deutschland e.V.

For additional applications of ambiguity and lines, see Metamorphism.

Rules:

Normal Sudoku: Place the digits 1 to 9 in every row, column, and 3x3 box.

Heatseekers—Arrows + Thermometers

• Place a circle on one end of each line. A digit in a circle is the sum of all other digits along its line (Arrows)
• Digits along a line strictly increase toward the circled end (Thermometers)

You can think of each line as an Arrow and Thermometer simultaneously, the direction of which must be determined.

Solve online:

• SudokuPad