Piri“The earlier the catch, the cheaper the fix!”
a sign that some × is wrong
- only 2 cells left — 3 cannot fit!
This picture is a spot-the-error: six crosses ring the 3, leaving only the two yellow cells — three ghosts can no longer fit. So one of those crosses is wrong. Checking cells-left ≥ ghosts-left per clue is a sanity check, and mathematicians run them mid-proof all the time. Catch the slip where it happened, and the damage stays small.
In the app, one new tip arrives for each day you play.
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