Tuesday, 10 March 2026

Freddie Hand

Here is a Pentomino Islands. This is one of the genres that appeared in round 2 of the WPF Puzzle GP, which I guess makes this puzzle a warm down. Well done to anyone who gave the round a try.

🚨 NEGATIVE CONSTRAINT ALERT 🚨

Rules: Shade some pentominoes (connected groups of 5 shaded cells) such that no two pentominoes touch one another, not even diagonally. No two pentominoes may be the same shape, counting rotations and reflections as the same. Number clues cannot be shaded, and cells contain black squares must be shaded.

All unshaded cells must form one edge-connected area, and no 2x2 region may be entirely unshaded. Cells labeled ‘3’ must touch 3 unshaded cells along an edge; cells labeled ‘4’ must touch 4 unshaded cells along an edge. 🚨 All other unshaded cells must touch 2 or less unshaded cells along an edge 🚨. In other words, "all possible 3's and 4's are given".

Note: The set of pentominoes is given outside the grid for your convenience. If you use shading to mark them as used, remember to remove your shading at the end!

Acquire a Speedy Sloth 🦥 by solving the puzzle in 3:15 or less!
Obtain a Quick Crab 🦀 by solving the puzzle in 6:30 or less!
And all solvers who complete the puzzle will be rewarded with a Tractor Tractrac Chat 🐦

Example (Penpa+): https://tinyurl.com/3d76jftm
Puzzle (Penpa+): https://tinyurl.com/bdhu794w