How Pips works
Pips is a domino-placement logic puzzle. You’re given a set of dominoes and a board divided into colored regions, and you must place every domino so that each region satisfies its rule. The pips (dots) on the domino halves are the values you’re arranging — the whole puzzle is about making the numbers in each region obey its constraint.
Like Sudoku, there’s exactly one valid arrangement, so every placement is a deduction, not a guess — if you’re guessing, there’s usually a forced move you’ve missed.