243 ways to win is a slot payout system that replaces fixed paylines with position-free matching. On a standard grid of five reels and three rows, a win counts whenever the same symbol appears on neighbouring reels from left to right, wherever it sits on each reel. Three rows on each of five reels gives 3 × 3 × 3 × 3 × 3 = 243 possible symbol paths, which is where the name comes from.
Unlike a classic payline game, the player does not pick lines: the stake normally covers every way at once. Larger grids apply the same idea, so five reels of four rows give 1,024 ways.
For operators, tagging the mechanic in lobby filters helps players find ways-based titles quickly. The exact rules, including whether wins can also pay from right to left, are listed in each game’s paytable.