Open every round in this order. 1: the 0 rows, columns and clues are already crossed out for you — start by seeing how far those × reach. 2: collect the big numbers — the 8 here fills its whole window. 3: check corners and edges. Tracing 1-2-3 clears half the board before real thinking starts. A fixed procedure is called an algorithm. Routine is speed; save your brain for the hard part.

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.