Logic Masters Deutschland e.V.

Cast (archery): the distance that a bow can shoot an arrow.

Rules:

Normal Sudoku Rules apply: the digits 1 to 9 must appear in every row, column, and 3x3 box.

Cells with gray squares must contain even digits.

Arrow rules apply: digits along arrow stems sum to the digit in the corresponding circle—except all of the arrow stems are hidden. Each circle has exactly one hidden arrow stem that is 3 cells long and extends from its circle in a straight line, either horizontally or vertically. Arrows may not cross, overlap, or share cells with other arrows.

This analogy may be helpful: arrows fit into the grid like I-Blocks (or line pieces) in Tetris, where each I-Block has a single circle at one of its ends.

You can solve online at:

• F Puzzles
• CTC
• Penpa+