Quarto · 大同棋
No piece is yours: your opponent hands you the one you must place. Four sharing any single trait wins, for whoever placed last.
棋子不分敌我：你要摆的那一颗，是对方挑给你的。四颗有共同点连成线，算摆下最后一颗的人赢。
棋子不分敌我，摆的棋由对方来选，摆完再替对方选下一颗
No piece belongs to either side — your opponent picks what you place
玩法要点
- 棋子：共 16 颗，互不相同
- 棋盘：4×4，共 16 格
- 获胜：摆出 4 颗有共同特点的棋子连成一条线
Quick start
- If any row, column, or diagonal ends up with four pieces that all share one trait (all dark, all hollow, whatever it is), whoever just placed that piece wins.
- On your turn, you place whichever piece your opponent handed you last turn — you choose where on the board it goes.
- The very first move of the game is different: the board is still empty, so there’s nothing to place yet — just pick a piece and hand it over.
快速上手
- 横、竖、斜任意一条直线上的 4 颗棋，只要有一种特点是一样的（比如都是黑的，或者都是空心的），摆下最后一颗的这一方就赢了。
- 每一步棋，摆的都是对方上一步选好、交过来的那一颗，摆在哪个空格自己决定。
- 开局第一步比较特殊：棋盘还是空的，没有棋可摆，只需要选一颗棋交给对方，由对方摆下第一颗。
Rules
16 Pieces, All Different
Every piece has 4 traits — big or small, dark or light, square or round, solid or hollow — and all 16 combinations exist exactly once.
No piece belongs to either player; either side can place any of them.
Your Opponent Picks, You Place
On your turn, you place whichever piece your opponent handed you last turn — you choose where on the board it goes.
Once it’s placed, you pick a piece and hand it to your opponent for their turn.
The very first move of the game is different: the board is still empty, so there’s nothing to place yet — just pick a piece and hand it over.
Four Sharing a Trait Wins
If any row, column, or diagonal ends up with four pieces that all share one trait (all dark, all hollow, whatever it is), whoever just placed that piece wins.
Even if your opponent handed you that exact piece — placing it is what counts.
A Full Board With No Line Is a Draw
If all 16 squares fill up and no shared-trait line ever appears, the game ends in a draw.
Timer
Each turn lasts 60 seconds. When time runs out, the turn passes to the other side automatically.
You can change the difficulty anytime in Game Settings.
规则详解
16 颗棋子，各不相同
每颗棋子有 4 种特点：大小、黑白、方圆、空心还是实心，16 种组合各只出现一次。
棋子不属于任何一方，谁都能摆到棋盘上。
摆的棋，由对方指定
每一步棋，摆的都是对方上一步选好、交过来的那一颗，摆在哪个空格自己决定。
摆完之后，再选一颗棋交给对方，轮到对方摆下一手。
开局第一步比较特殊：棋盘还是空的，没有棋可摆，只需要选一颗棋交给对方，由对方摆下第一颗。
4 颗棋有共同点就连成线
横、竖、斜任意一条直线上的 4 颗棋，只要有一种特点是一样的（比如都是黑的，或者都是空心的），摆下最后一颗的这一方就赢了。
即使这颗棋是对方选来的，谁把它摆上去，谁就赢——这正是这盘棋最特别的地方。
摆满还没连线就是平局
16 个格子全部摆满，如果始终没有出现共同特点连成一条线，游戏就算平局。
计时
每步限时 60 秒，时间到了会自动换对方走。
可以在"对局设置"里换一个难度，随时都能换。