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 →
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 →

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.

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
対局数 40首位参加すると誰かわかります →200対コンピュータ最終対局:4日前
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競技五目
Exactly five wins. Six or more does not.
対局数 2首位参加すると誰かわかります →100対コンピュータ最終対局:7日前
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連珠
Black may not make a double three, a double four or an overline. White may.
対局数 1首位参加すると誰かわかります →100対コンピュータ最終対局:今日
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오목
The double three is forbidden for both sides. Overlines win.playrulesrecordstandingsfamily
Cờ ca-rô
Exactly five wins, and only if it is not shut in at both ends.playrulesrecordstandingsfamily
六子棋
Two stones a turn. Six in a row wins.Also known as Connect 6, Connect Sixplayrulesrecordstandingsfamily
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.

二抜き連珠
Five in a row wins. So does capturing five pairs.Also known as Pente, Golden Pente
対局数 5首位参加すると誰かわかります →320対コンピュータ最終対局:今日
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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.

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
対局数 1首位参加すると誰かわかります →100対コンピュータ最終対局:7日前
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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
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
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
消し落とし
A full bottom row vanishes and everything drops a row.Inspired by Connect Fourplayrulesrecordstandingsfamily
譲り落とし
Making four loses. Force your opponent into it.Inspired by Connect FourAlso known as Giveaway Four in a Rowplayrulesrecordstandingsfamily
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
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.

二連五目
Gomoku with dominoes: every piece is two stones, and not always yours.
対局数 1首位レーティング対局はまだありません最終対局:7日前
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積み五目
Gomoku with falling-block pieces: four stones each, two of each colour.Inspired by the seven tetromino shapesplayrulesrecordstandingsfamily
回し五目
Place a stone, then turn one quarter of the board. Five wins.Inspired by Pentagoplayrulesrecordstandingsfamily
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.

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
対局数 62首位参加すると誰かわかります →2400対コンピュータ最終対局:4日前
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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
逆リバーシ
Everything turns as usual, but the fewer discs wins.Also known as Anti-Flipversi, Anti-Flipversi 6x6playrulesrecordstandingsfamily
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
対局数 4首位参加すると誰かわかります →220対コンピュータ最終対局:2日前
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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.

輪王五目
Five in a row on a board with no edges: every side joins its opposite.playrulesrecordstandingsfamily
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.

ハルマ
A race across the board: step, or jump chains over any piece, and fill the far corner first.
対局数 4首位参加すると誰かわかります →200対コンピュータ最終対局:2日前
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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.

ヘックス
Join your own two sides of the board with an unbroken chain. A draw is impossible.
対局数 1首位レーティング対局はまだありません最終対局:7日前
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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.

チェッカー
Jump the other side's pieces off the board. Capturing is forced, and a king moves both ways.
対局数 3首位参加すると誰かわかります →300対コンピュータ最終対局:2日前
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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
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
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
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
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.

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.

三目並べ
Three in a row on a 3×3 board.
対局数 5首位参加すると誰かわかります →500対人最終対局:5日前
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自由三目
Place either mark. Three in a row of either wins for whoever makes it.
対局数 1首位参加すると誰かわかります →100対コンピュータ最終対局:4日前
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黒だけ三目
Only black stones. Whoever makes three in a row loses.
対局数 1首位レーティング対局はまだありません最終対局:8日前
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罠三
Four in a row wins. Three in a row loses.Inspired by Squavaplayrulesrecordstandingsfamily
四角四目
Four pieces each. Line them up, or make a square.Inspired by Teekoplayrulesrecordstandingsfamily
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.