GOM🪨KU — but the version that doesn't let the game go stale on you
Look, you know the base game. Five in a row, gridded board, dead simple to learn, infuriatingly deep to master — it's been eating people's evenings since before chess was cool in Japan. But vanilla Gomoku has a dirty secret competitive players figured out decades ago: whoever moves first just... wins, if they're not sandbagging. No skill expression, just a coin flip disguised as a game. This build fixes that, and then keeps going.
The opening isn't free anymore — Swap2. You don't just slam a stone in the center and coast. Player 1 places three opening stones, then Player 2 gets to make the call: take Red as-is, steal Black, or place two more stones and hand the final color choice back to Player 1. It's a mind game before the "real" game even starts — you're constantly calculating "is this position too strong to hand to my opponent?" That's the exact mechanism top-level tournament Gomoku uses to keep first-move advantage from being a solved, boring win. Toggle it on and every opening becomes a negotiation.
Red has to earn the win — Renju forbidden moves. Flip this on and the attacking color (Red) can't just build an unstoppable double-threat wall — overlines (6+ in a row), double-threes, and double-fours are illegal for Red. Try to force one and the cell flashes, shakes, and kicks you back — but here's the sharp edge: an exact five always wins no matter what else it forms, so there's a real skill test in threading a winning line through what looks like a trap. This is the rule that separates "I know the rules" from "I can actually calculate."
The board fights back against stalling — Growing Board. Cramped, grindy endgames where nobody can find room to build a five? Gone. Once the board crosses 50% full, a fresh row silently opens up at the bottom, mid-game, no warning — new cells even pulse in so you see the board breathe. Suddenly that "safe" defensive shape you built isn't safe anymore. It's a small mechanic that completely kills the "well this game's basically a draw now" feeling.
Everything's a toggle, nothing's forced. There's a features panel — one flag per feature, hover the little (i) for exactly what each one does — and you can mix and match: pure classic, tournament-legal Renju, chaos-growth, or all three stacked. The catch: once a game's live, the flags lock. No rage-toggling Renju off mid-loss. You commit to the ruleset before the first stone drops, same as you'd commit in a real match.
Solo or head-to-head, your call. Two-player local for couch matches, or throw yourself at the AI — Easy for warmup, Hard if you want it actually punishing you for weak shape (it hunts your open threes, blocks your fours, and won't hand you a free win). Running score tally the whole session — Red / Blue / Draws — so you can see the damage across a night of rematches, "NEW GAME" one click away the second the board lights up with a win.
It's still Gomoku at its core — that's the point. Nothing about the fundamentals changed. But the version that ships with a fair opening, a real forbidden-move skill ceiling, and a board that refuses to let a match die of boredom? That's the one worth actually sinking a session into.