GridWits

Single Combination

Easy Used by Smart Hint

This run's remaining sum has exactly one digit combination left — every empty cell must draw from it. The classic "17 in two cells is 8+9" move.

17 8 9 8 9

How it works

  1. Two cells must sum to 17 with distinct digits 1-9.
  2. There's exactly one way: 8 + 9. Which cell gets which isn't known yet, but neither can hold anything else.
  3. Pencil both cells down to {8, 9}. The same idea powers every "magic" clue — 3, 4, 16, 17 in two cells; 6, 7, 23, 24 in three.