Pour coloured balls between tubes until every colour stands alone. A hundred rule sets cover hidden depths, rainbow wilds, fused bombs, frozen balls, reverse gravity, tubes open at both ends, teleport pairs and racks where pouring follows a ring, line or star, plus two hundred puzzles whose par is a proved optimum.
The assistant runs a real search and says which kind of answer it has — a proved finish with the move count, or a judged move when the position is too large to settle — and every board is built backwards from a solved rack, so it can always be won and always carries a winning line. Thirty rack looks with a colour editor, ten piece themes, colour-blind symbols, twelve save slots with autosave, JSON in and out, five languages.