Shuang Cheng Chess · 双承棋
One piece in the middle belongs to both of you. Move it, and your opponent is barred from moving it straight back.
中间那枚子归两个人共有。你刚动过它，对方就不许立刻挪回去。
三子围堵，双承棋子谁都能用
Three pieces each, plus one shared piece either side can move
玩法要点
- 棋子：双方各 3 枚，另有 1 枚公用
- 棋盘：9 点，形似沙漏
- 获胜：让对手无棋可走
Quick start
- A player who has no legal move at all — not even the shared piece — loses right away.
- Take turns moving one of your own pieces, or the shared piece at the center, one step along a line to an adjacent empty point. No jumping, no capturing.
- If the shared piece was just moved, the other player cannot move it on their very next turn — it becomes movable again once that player has taken one turn with a different piece.
快速上手
- 轮到某一方却无棋可走——连公用棋子也没法动——就算输了。
- 双方轮流选一枚自己的棋子，或者选正中心那枚公用棋子，沿连线走一步到相邻的空棋点。不能跳跃，也不能吃子。
- 如果刚才走的是公用棋子，下一回合对方不能马上再走它，要等对方走完一步别的棋子之后，公用棋子才能再被动。
Rules
Board and Setup
The board has 9 points shaped like an hourglass: two top corners meet at a hub, the middle is a diamond, and the bottom hub meets two more corners.
One player's 3 pieces start on the top three points, the other player's 3 pieces start on the bottom three points. One more piece — shared by both players — starts at the diamond's exact center.
Movement and the Shared Piece
Take turns moving one of your own pieces, or the shared piece at the center, one step along a line to an adjacent empty point. No jumping, no capturing.
If the shared piece was just moved, the other player cannot move it on their very next turn — it becomes movable again once that player has taken one turn with a different piece.
Winning
A player who has no legal move at all — not even the shared piece — loses right away.
The core idea is to use the shared piece together with your own pieces to trap the other side's pieces in a corner.
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
棋盘与开局
棋盘有 9 个棋点，形状像一个沙漏：上面两个角连着一个枢纽，中间是一个菱形，下面枢纽再连两个角。
一名玩家的 3 枚棋子摆在上方三点，另一名玩家的 3 枚棋子摆在下方三点。菱形正中心另外放一枚谁都能用的棋子。
行棋与公用棋子
双方轮流选一枚自己的棋子，或者选正中心那枚公用棋子，沿连线走一步到相邻的空棋点。不能跳跃，也不能吃子。
如果刚才走的是公用棋子，下一回合对方不能马上再走它，要等对方走完一步别的棋子之后，公用棋子才能再被动。
谁赢
轮到某一方却无棋可走——连公用棋子也没法动——就算输了。
围堵的思路：用公用棋子和自己的棋子一起把对方的棋子堵在角落里。
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。