Sieve

Sieve

Take a number and its multiples go with it.

1. Tap a number to see what it clears, then tap it again to take it.
2. Taking a number clears it and every multiple of it in its row and column. Numbers above fall into the gaps.
3. A take scores the sum of what it clears, times how many numbers it clears.
4. After each take, two numbers drop in, where the marks above the well show.
5. Numbers grow as the run goes on. A number that drops onto a full column ends the run.