🏯 华容道Klotski Sliding Block Puzzle
在线华容道：横刀立马等 8 个经典布局，拖动或方向键移动方块，帮曹操从下方出口逃出；显示最少步数、步数统计、撤销和一键提示（最优解下一步）。Play Klotski (Huarong Dao) online: 8 layouts including the classic “横刀立马”, slide blocks by dragging or with the arrow keys to get the big block out of the exit, with optimal move counts, undo and an optimal-next-move hint.
拖动方块滑动（拖得远可以一次走两格）。键盘：先点一下棋盘，Tab/N 切换方块，方向键移动，U 撤销。同一方块连续移动只算一步。Drag a block to slide it (a long drag moves two squares). Keyboard: focus the board, Tab/N selects a block, arrows move it, U undoes. Consecutive moves of the same block count as one.
玩法说明与常见问题How to play & FAQ
「华容道」怎么玩？How do I play Klotski Sliding Block Puzzle?
4×5 的棋盘上有 10 个方块和 2 个空格。方块只能沿空格滑动，不能跳过或旋转。目标是把最大的“曹操”方块移到底部中间的出口。经典的「横刀立马」最少需要 81 步。Ten blocks sit on a 4×5 board with two empty squares. Blocks slide into empty space — no jumping or rotating. Get the big 2×2 block to the exit at the bottom centre. The classic layout needs at least 81 moves.
步数怎么计算？How are moves counted?
按华容道的通行算法：同一个方块连续移动（包括拐弯走两格）只算一步。每个布局旁边显示的数字是电脑用广度优先搜索算出的最少步数。As is traditional, moving the same block several squares in a row (even around a corner) counts as one move. The number next to each layout is the optimum found by breadth-first search.
提示是怎么来的？Where do hints come from?
点「💡 提示」时，程序会从当前局面搜索最短解，并替你走出最优的下一步，同时告诉你还差几步。Hint searches the shortest solution from your current position, plays the best next move for you and tells you how many moves remain.
为什么叫华容道？Why is it called Huarong Dao?
它取材于三国故事：曹操兵败从华容道逃走，关羽、张飞、赵云、马超、黄忠等人挡在路上。这里的方块名称仅作装饰。It recalls the Three Kingdoms tale of Cao Cao escaping through Huarong Pass past Guan Yu and the other generals; the block names are just decoration.
「华容道」免费吗？需要下载吗？Is Klotski Sliding Block Puzzle free? Do I need to download anything?
完全免费，无需注册、下载或安装，打开网页就能玩，手机、平板和电脑都支持；游戏完全在你的浏览器本地运行，不会上传任何数据。It is completely free with no sign-up, download or install — just open the page on a phone, tablet or computer. The game runs entirely in your browser and nothing is uploaded.