Flank and flip
Flank and flip
Flank the other colour with your own and it flips. 8×8 board, most discs at the end wins. That is the whole rule.
The computer has easy, normal and hard settings and starts on easy — if you cannot win, you will not come back, so win first, then turn it up. Two players on one device works too.
Legal moves are marked. Take a corner or flip five or more and you get a flash of text. The board is saved on your device, so you can close it mid-game.
Three wins on easy, then go up
The record keeps, so three wins in a row means you move up to normal. Drop back if the losses pile up.
One device, face to face
Put the phone in the middle of the desk and take turns. Legal moves are marked, so even someone who does not know the rules can play.
Winner stays on
The winner stays, the next person steps in. One break gets through three or four games.
Added "Dopa Reversi"
Play the computer or a friend on one device. Legal moves are marked