GridWits
Easy tier Technique 2 of 18 Used by Smart Hint

Diagonal Clues

Two clues that touch only at a corner can never share a cell — the two squares between them are sea.

How it works

  1. 1The 2 and the 3 touch only at a corner, so their islands can never share a cell.
  2. 2Each of the two squares between them touches both clues at once, so joining either island would connect the two.
  3. 3Neither square can belong to anybody — both are sea.
2 3
  • Sea
  • Cells that establish the pattern
  • Where the conclusion lands
Next in the ladder Separated by One →

Two clues with exactly one empty cell between them in a row or column — that cell is sea.