Dropline: Four in a Row

Dropline is four in a row, the game you already know: tap a column, your disc falls to the lowest free slot, and the first line of four in any direction takes it. What it adds is the part nobody else bothers with. After every game you get one line of review - which move cost you the game, and what you should have dropped instead. Not a graph, not a percentage. One sentence you can actually use next time. Four opponents. The first one will miss your threats now and then; the last one sees the trap you are building three moves before you finish building it. They are weak the way a person is weak - they overlook things - not by refusing to think. Three boards: a quick 6 by 5, the classic 7 by 6, and an 8 by 7 that roughly doubles the length of a game. Two players on one phone. Take a move back, ask for a hint, restart without it counting against you. Who drops first alternates every game, so a run of wins on your record actually means something.