Featured Puzzle Genres H-R

This is a list of rules with examples for logic puzzles featured on this blog. This page covers genres starting with H through R. For the rest, see this index.

Heyawake

Rules: Shade some cells so that no two shaded cells are orthogonally adjacent and the remaining unshaded cells form one orthogonally connected area. Numbered regions must contain the indicated amount of shaded cells. A line of consecutive unshaded cells may not cross more than one bold border.

Example:

Solve using Puzz.link / Pzplus

LITS

Rules: Shade one tetromino of cells in each region so that all shaded cells form one orthogonally connected area. Two tetrominoes of the same shape may not share a bold border, counting rotations and reflections as the same. No 2x2 region may be entirely shaded.

Example:

Solve using Puzz.link / Pzplus

Masyu

Rules: Draw a non-intersecting loop through the centers of some cells that passes through every circle. The loop must turn on black circles and travel straight through the cells on either side. The loop must go straight through white circles, and turn in at least one of the cells on either side.

Example:

Solve using Puzz.link / Pzplus

Nurikabe

Rules: Shade some cells so that all shaded cells form one orthogonally connected area. Clues cannot be shaded, and every orthogonally connected area of unshaded cells contains exactly one clue, the value of which represents the size of the area. No 2x2 region may be entirely shaded.

Example:

Solve using Puzz.link / Pzplus