Every line carries two numbers — ghosts left and blanks left — and both only shrink. The framed row has one of three found, plus two crosses: two left, two blanks. The instant the numbers meet, the yellow cells are all ghosts. See the board as a list of shrinking numbers and you stop missing deductions. Nothing ever grows, so the watching is… restful.

In the app, one new tip arrives for each day you play.

▶ Try 50 rounds in your browser A free demo, no install. All 2,000 rounds are in the app.