Two players, one screen. Check and checkmate are detected; your rating updates after each finished game (K=32).
Claim a line, close a box and keep the turn. Best of three rounds; score nothing in a round and you lose it on the spot.
The rival throws a fixed printed sequence, so read the next throw and answer it. Nothing here is luck - keys 1 / 2 / 3 also work.
Hit, stand, double, split and insure against a dealer who stands on 17.
The patience classic: four free cells, undo and one-click auto finish.
Guess the word before the drawing runs out.
27 elements, density physics and real pair reactions — pour, ignite, dissolve, grow.
Draw one freehand circle and get scored on how round it really is.
Every rule you satisfy unlocks a worse one. Ten rules stand between you and the win.
