Tuesday, 17 September 2024

Walker

Today’s GAPP is an Offspring! This genre first appeared in the Oguz Atay Puzzle Contest, a 10-round monthly contest leading up to the 2009 World Puzzle Championship in Antalya. In that competition, there were four Offspring puzzles, shaped like the letters OAPC! This genre has a simple and elegant ruleset, though the scanning can sometimes be a bit difficult.

Rules: Place a number from 1 to 9 into each empty cell such that no two adjacent cells contain the same number, even diagonally. For each cell, each possible number less than the number the cell contains must appear at least once in the (up to) eight surrounding cells.

Interface Note: This type can be tricky to scan! To keep track, I recommend shading numbers once they contain all lower numbers in their surrounding cells. (The times are a bit looser to accommodate shading and mobile entry.)

Example (Penpa): https://tinyurl.com/2bzuf7kf

Solve in 4:30 or under for a Speedy Sloth! 🦥
Complete in 7:30 or under for a Quick Crab! 🦀
And all solvers who complete the puzzle will earn a Lesser Number Sand-Plover! 🐦

Puzzle (Penpa): https://tinyurl.com/28hhh7a8