itsutsu
Every game here is free to read about — the rules, what it is, where it came from, and the family it belongs to. Playing one needs an invite.I have an invite →
Learn how to play them 学びThe shapes that win, the moves that force, and the mistakes everyone makes once. Each guide names the games it applies to.The learning shelf →

Every game 全種目

Almost every game here is five in a row with one idea changed. Every name below leads to that game, and the three ways of looking at the list are the same games arranged differently.

44 games in 11 families. Each one has a page of its own, and under it the rules, the record, the standings and a board.

Five in a row 五目7 games

The classic and its tournament forms. Start with Gomoku; the rest tighten the rules.

Gomoku五目並べ
Five or more in a row wins.Also known as Go-Moku, Go Moku, Pro Go-Moku, Large Go Moku, Small Go Moku
40 games playedTop playerJoin to see who →200against the computerLast played 4 days ago
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Tournament Gomoku競技五目
Exactly five wins. Six or more does not.
2 games playedTop playerJoin to see who →100against the computerLast played 7 days ago
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Renju連珠
Black may not make a double three, a double four or an overline. White may.
1 game playedTop playerJoin to see who →100against the computerLast played today
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Omok오목
The double three is forbidden for both sides. Overlines win.playrulesrecordstandingsfamily
CaroCờ ca-rô
Exactly five wins, and only if it is not shut in at both ends.playrulesrecordstandingsfamily
Connect6六子棋
Two stones a turn. Six in a row wins.Also known as Connect 6, Connect Sixplayrulesrecordstandingsfamily
Misère Five負け五目
Five in a row loses. Make your opponent complete it.playrulesrecordstandingsfamily

Captures 取り2 games

Five in a row, or take enough of the other side's stones.

Ninuki-renju二抜き連珠
Five in a row wins. So does capturing five pairs.Also known as Pente, Golden Pente
5 games playedTop playerJoin to see who →320against the computerLast played today
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Sannuki-renju三抜き連珠
The capture game where a flank takes a pair or a triple. Fifteen stones win.Inspired by Keryo-PenteAlso known as Pro Pente, Keryo Penteplayrulesrecordstandingsfamily

Drops 落とし8 games

Stones fall to the bottom of their column. Quick, and good on a phone.

Drop Four落とし四目
Stones fall to the bottom of their column. Four in a row wins.Inspired by Connect FourAlso known as Four In a Row, Stack4, Stack 4x4
1 game playedTop playerJoin to see who →100against the computerLast played 7 days ago
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Ring Drop輪落とし
Drop Four on a cylinder: the left and right edges join.Inspired by Connect FourAlso known as Cylindrical Four (Only) In a Rowplayrulesrecordstandingsfamily
Hole Drop穴落とし
One square is dead: nothing can land on it or count through it.Inspired by Connect FourAlso known as Blackhole Four in a Rowplayrulesrecordstandingsfamily
Hot Drop熱点落とし
A hotspot counts as either colour, and a hole counts as nothing.Inspired by Connect FourAlso known as Hotspot Four in a Rowplayrulesrecordstandingsfamily
Clear Drop消し落とし
A full bottom row vanishes and everything drops a row.Inspired by Connect Fourplayrulesrecordstandingsfamily
Giveaway Drop譲り落とし
Making four loses. Force your opponent into it.Inspired by Connect FourAlso known as Giveaway Four in a Rowplayrulesrecordstandingsfamily
Edge Drop縁寄せ
Gravity from all four edges: a stone must rest on something.Inspired by Connect FourAlso known as Zero G Four in a Rowplayrulesrecordstandingsfamily
Wormhole Drop穴通し落とし
Two squares are joined: a line entering one comes out of the other.Inspired by Connect FourAlso known as Wormhole Four in a Rowplayrulesrecordstandingsfamily

Pieces and twists 駒と回し4 games

Our own games: lay dominoes or blocks from a shared queue, or turn the board after every stone.

Domino Five二連五目
Gomoku with dominoes: every piece is two stones, and not always yours.
1 game playedTop playerNo rated games yetLast played 7 days ago
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Block Five積み五目
Gomoku with falling-block pieces: four stones each, two of each colour.Inspired by the seven tetromino shapesplayrulesrecordstandingsfamily
Twist Five回し五目
Place a stone, then turn one quarter of the board. Five wins.Inspired by Pentagoplayrulesrecordstandingsfamily
Twist Four回し四目
The small twist game: four 2×2 quadrants, four in a row.Inspired by Pentagoplayrulesrecordstandingsfamily

Flips 反転5 games

Nothing is yours until the end. Bracket a run of the other colour and it turns.

Reversiリバーシ
Bracket a run of the other colour and it turns. Most discs at the end wins.Inspired by OthelloAlso known as Flipversi
62 games playedTop playerJoin to see who →2400against the computerLast played 4 days ago
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Classic Reversi古式リバーシ
The 1880s rule: the players lay the first four discs themselves. Any flipping game here can be set up either way.playrulesrecordstandingsfamily
Anti-Reversi逆リバーシ
Everything turns as usual, but the fewer discs wins.Also known as Anti-Flipversi, Anti-Flipversi 6x6playrulesrecordstandingsfamily
Mini Reversi小リバーシ
The flipping game on a 4×4 or 6×6 board, which can grow to 8×8 mid-game.Also known as Flipversi 6x6
4 games playedTop playerJoin to see who →220against the computerLast played 2 days ago
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Grand Reversi大リバーシ
The flipping game on a 10×10 board: a longer game, with more middle to fight over before anyone reaches an edge.Inspired by OthelloAlso known as Flipversi 10x10playrulesrecordstandingsfamily

Strange boards 変盤2 games

Five in a row, on a board that does not behave: edges that join, and squares you cannot use.

Toroidal Five輪王五目
Five in a row on a board with no edges: every side joins its opposite.playrulesrecordstandingsfamily
Obstacle Five石場五目
Five in a row across a board scattered with dead squares and hotspots.playrulesrecordstandingsfamily

Races 競走2 games

No lines and nothing captured. Get every piece across the board before the other side does.

Halmaハルマ
A race across the board: step, or jump chains over any piece, and fill the far corner first.
4 games playedTop playerJoin to see who →200against the computerLast played 2 days ago
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Chinese Checkersダイヤモンドゲーム
Fill the point of the star directly opposite yours, one step or jump-chain at a time.playrulesrecordstandingsfamily

Connections 連結1 game

No lines and nothing taken. Join your own two sides of the board before the other side joins theirs.

Hexヘックス
Join your own two sides of the board with an unbroken chain. A draw is impossible.
1 game playedTop playerNo rated games yetLast played 7 days ago
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Checkers チェッカー6 games

No lines, no queue, no board full of stones. Jump the other side's pieces off, or be left with no move at all.

Checkersチェッカー
Jump the other side's pieces off the board. Capturing is forced, and a king moves both ways.
3 games playedTop playerJoin to see who →300against the computerLast played 2 days ago
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International Draughts国際ドラフツ
Draughts on a 10×10 board: men take backward, kings fly, and you must take the most you can.playrulesrecordstandingsfamily
Brazilian Draughtsブラジルチェッカー
The international rules on the 8×8 board: men take backward, kings fly, and the longest capture is compulsory.playrulesrecordstandingsfamily
Canadian Checkersカナディアンチェッカー
The international rules on a 12×12 board, with thirty men a side.playrulesrecordstandingsfamily
Russian Draughtsロシアチェッカー
Draughts on 8×8 with flying kings: men take backward, any capture may be chosen, and a man crowned mid-capture takes on as a king.playrulesrecordstandingsfamily
Pool Checkersプールチェッカー
American pool: men take backward, kings fly, and you choose which capture to make.playrulesrecordstandingsfamily

Territory 陣地1 game

No lines, nothing moves, and stones are captured whole. Surround more of the board than the other side.

Go囲碁
Surround more of the board than the other colour. Capture by taking a group's last liberty.playrulesrecordstandingsfamily

Small boards 小盤6 games

Games you can read to the end, and games where the trick is what you must not do.

Tic-tac-toe三目並べ
Three in a row on a 3×3 board.
5 games playedTop playerJoin to see who →500among peopleLast played 5 days ago
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Wild Tic-tac-toe自由三目
Place either mark. Three in a row of either wins for whoever makes it.
1 game playedTop playerJoin to see who →100against the computerLast played 4 days ago
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Notakto黒だけ三目
Only black stones. Whoever makes three in a row loses.
1 game playedTop playerNo rated games yetLast played 8 days ago
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Trap Three罠三
Four in a row wins. Three in a row loses.Inspired by Squavaplayrulesrecordstandingsfamily
Square Four四角四目
Four pieces each. Line them up, or make a square.Inspired by Teekoplayrulesrecordstandingsfamily
Maker and Breaker作り手と壊し手
Both players place either colour. One wants a five, the other wants none.Inspired by Order and Chaosplayrulesrecordstandingsfamily

Some games here are our own versions of games you may know by other names, rebuilt from their rules under names of our own. Drop Four is our version of the falling-stone game sold as Connect Four; Twist Five and Twist Four of the quadrant-turning game sold as Pentago; Ninuki-renju is the Japanese ancestor of the capture game sold as Pente, and Sannuki-renju our version of the pair-and-triple rule sold as Keryo-Pente; Maker and Breaker is our version of the game published as Order and Chaos.

Connect Four is a trademark of Hasbro; Pentago of Mindtwister; Pente and Keryo-Pente of Winning Moves. None of them has any connection with this site, and the names appear here only to say what a game resembles. Renju, Omok, Caro, Connect6, Squava, Teeko, Notakto and Wild tic-tac-toe are traditional or published games whose rules are described in their own words; Trap Three and Square Four are our names for the first two.