A closed loop with a pump, two blocks and a radiator — and every pipe turned the wrong way. Rotate them until every joint meets another and nothing is left open, and the coolant starts moving.
There is one rule: no open ends. Wherever a pipe reaches the edge of its tile, the tile next to it must reach back — and nothing may point off the board. Get every joint agreeing and the loop fills.
Each tap turns a tile a quarter turn clockwise. Straights, elbows, tees, crosses and single ends all appear, and every board is solvable without guessing.
Tap or clickFour pieces sit under the pipes on every board — the pump in cyan, the CPU block in green, the GPU block in purple and the radiator in amber. They are what the coolant is going round, and they light up with the loop when it seals.
Tap or clickBorder tiles are the easiest way in — nothing may point off the board, so a pipe on the edge has fewer legal positions than one in the middle.
The usual openingPar is the fewest turns the board can be solved in. Beating it means you read the board rather than spinning tiles, which is the real game.
Shown under your countNine boards on one clock: three at five by five, three at seven by seven, three at nine by nine, each named after a stage of a cooling build. Three hints across the whole run.
Best run time savedOne board at a time at whichever size you pick, with unlimited hints and its own best time. Use it to learn the shapes before taking on a run.
Small, medium or largeNothing here is timed against you. The clock runs so you have a best to beat, and you can leave a board sitting as long as you like.
Think as long as you wantCustom water cooling looks superb and leaks are unforgiving. If you want one built and pressure tested properly, that is a job for the bench.
