Play Connect6 Online vs AI
How to Play Connect6
Connect6 was designed to even out Gomoku’s first-move edge. Black places a single opening stone; after that each player drops exactly two stones a turn, and the first six in a row wins. The two stones need not touch. They can split attack and defense, or open threats in two places. Stones never move and are never captured.
How Connect6 Works
The board is a 19×19 grid of intersections. Black moves first with one stone. Every later turn must place exactly two stones; the turn is submitted when the second stone is set. Six or more in a row horizontally, vertically, or diagonally wins at once.
The two stones may land on any empty points. There are no captures and no forbidden patterns. If the board fills without a six, the game is a draw. The AI on this site searches in the browser.
Leave Room for Two Threats
Do not crowd the first stones onto one short line. A crossing near the center can serve two directions, so the reply has somewhere to split. A cluster in the corner lets one stone seal the only exit.
Each Turn Changes Two Places
In Gomoku a single live four often ends the game. Here the opponent answers with two stones, so one live three is usually cheap. The stronger turn creates two problems at once: both lines need a reply, and the defender can spend only one stone on each.
Replay the Pair That Slipped
There are multiple AI levels, and you can sit Black or White. A hint shows the one or two points for the current turn. Undo first clears stones that are not yet submitted, then takes back a full turn. The search stays in the browser.
19×19Fixed board
1+2Black’s first stone, then two a turn
6In a row to win
Full boardDraw if nobody connects six
Questions
Why does Black place only one stone at the start, when every other turn is two?
That single stone is the whole trick. Moving first is an edge, and starting one stone short pays it back. From White’s first turn on, both sides place two, so the stone count never differs by more than one and nobody gets a free tempo.
Do the two stones in a turn have to touch?
No. They can go on any two empty points, even opposite corners. Splitting them is often the strongest play: one stone stretches your own line while the other blocks, or each one starts a separate threat.
Does a line of seven or eight still win?
Yes. Six or more of your stones in a row, horizontally, vertically, or diagonally, wins the moment that turn lands. There is no overline rule like the one in some Gomoku variants.
Are there forbidden moves or captures?
Neither. Black and White play under exactly the same rules, with no double-three or double-four bans. Stones never get captured and never move once placed, so each one stays where you put it for the rest of the game.
I tapped the wrong point for my first stone. Can I take it back?
Yes. A turn only goes through once both stones are down. Your first stone shows as a pending ring, and tapping it again removes it so you can pick another point. After the second stone, the turn is played and only Undo can reverse it.
I’m decent at Gomoku. What changes when I switch?
Your opponent also gets two stones, and that changes everything. An open four that wins in Gomoku gets capped at both ends here in a single reply. To win, you need three or four threats at once, more than two stones can cover. Think about stacking threats, not racing down one line.
Can I choose Black or White against the AI?
Yes. Take Black and you place the opening stone. Take White and the AI opens, so your first turn is two stones in reply. There are multiple AI levels; Gentle practice is a good place to start, and you can move up once it feels easy.
Will the hint just play the move for me?
No. It marks one or two suggested points on the board, and you still decide whether to play them. Hints think at the AI level you have selected, not a stronger hidden one. Try picking your own move first, then check the hint and see where you differ.
If I close the page, is my game still there?
Yes. Games against the AI and two-player games on one device are saved separately in this browser and pick up where you left off. Switching devices or clearing this site’s browser data will lose them.
Do I need an account or an app?
Neither. Open the page and start placing stones, with no email or password, and the AI runs in your own browser. If you play often, you can add the site to your home screen for one-tap access, but it works just as well without that.
