Formula 1 tic-tac-toe. Three rows, each one a team, and three columns, each one another category: a nationality, a team-mate, more than a hundred races, having won at least once. Each cell needs a driver who fits its row and its column. The board is the same for everyone each day, and the name comes from the radio: «box, box» is what a driver hears when he is called into the pits.
You do not pick a cell. You name a driver and he goes into every cell he fits, so one who raced for many teams can fill three at once. There are two goals at the same time: complete the nine cells as soon as possible and name as many drivers as you can. A name that fits nowhere costs nothing; it is just recorded in the result.
With the clock, the categories are revealed when you press the start and you have three minutes. With no limit you can think each cell through, but the result says which mode you played.
Crossing two categories can leave a cell empty: no Haas driver has ever been world champion. That is why, before a board is accepted, each of the nine cells is checked to be satisfied by at least two drivers from 2000 on and three in total. The rows are always teams with many drivers from this century, and the columns mix families so the board is not team against team nine times.
The categories come from the same catalogue as GrillHeat, worked out from every Grand Prix since 1950. When you finish, every cell you left empty shows a driver who fitted it.
What the simulator says about what you have just played, measured over thousands of seasons.