Patches guide

Patches Strategy & Tips

Patches comes down to narrowing every clue to the one rectangle that fits.

Start with the basics

  • Start with the most constrained clue.
  • Use the shape icon to cut the options.
  • Fix squares early.

Advanced strategy

List the options

For a hard clue, list every rectangle that fits its area and shape. Cells that every option shares are certain.

Claim orphan cells

If a cell can only be reached by one clue’s rectangles, that patch must include it.

Work inward from the edges

Patches against the border have fewer ways to grow, so fixing them first shrinks the middle.

Common mistakes

  • Placing a large patch before checking the small clues around it.
  • Forgetting that every patch holds exactly one clue.

Worked example

In the example below, the patches along the edges have the fewest options, and the 2×2 square fills the space they leave.

322423
Patches: 3 (1×3) from R1C1 to R1C3; 2 (2×1) from R1C4 to R2C4; 4 (2×2) from R2C1 to R3C2; 2 (2×1) from R2C3 to R3C3; 2 (2×1) from R3C4 to R4C4; 3 (1×3) from R4C1 to R4C3.

Keep learning