⚪ 珍珠回路Pearl Loop
在线珍珠回路谜题：在格子中心之间画一条不交叉、不分叉的闭合回路，经过所有珍珠。白珍珠处必须直行穿过，并且在它前后至少一格转弯；黑珍珠处必须转弯，且转弯前后都要各直行一格。随机生成 6×6、8×8、10×10 三种大小，手指拖动即可画线，任何满足规则的回路都算完成。Pearl Loop online: draw one closed loop through the cell centres — no crossings, no branches — that passes every pearl. At a white pearl the loop goes straight through and turns in at least one of the neighbouring cells; at a black pearl it turns, and goes straight for at least one cell on both sides. Random 6×6, 8×8 and 10×10 puzzles, drawn with a finger or mouse; any loop that follows the rules counts.
在格子之间按住拖动画线，再拖一次同一段即可擦掉；也可以点击靠近格边的位置切换那一段。Press and drag between cells to draw; drag over a segment again to erase it. Tapping near a cell edge toggles that segment.
玩法说明与常见问题How to play & FAQ
「珍珠回路」怎么玩？How do I play Pearl Loop?
回路只能沿上下左右走，经过的每一格恰好进一次、出一次。白珍珠：线必须笔直穿过，并且紧挨着的两格里至少有一格是拐弯处。黑珍珠：线必须在这里拐 90°，而且拐弯后的两个方向都要至少再直走一格。所有珍珠都必须在同一条回路上，不能画成多个圈。The loop moves up, down, left and right, entering and leaving every cell it visits exactly once. White pearl: the loop runs straight through it, and at least one of the two cells next to it is a turn. Black pearl: the loop turns 90° on it and then runs straight for at least one more cell in both directions. All pearls must be on the same single loop.
不经过珍珠的格子可以走吗？Can the loop use cells without pearls?
可以，而且通常必须这样。回路可以经过任意空格，只是不能交叉或分叉。Yes, and it usually has to. The loop may pass through any empty cell — it just can't cross or branch.
答案唯一吗？Is there one answer?
题目随机生成，可能存在多种解；程序会检查你的回路是否满足所有规则，满足即通关。Puzzles are random and may have several solutions; the game checks your loop against the rules and accepts any that fit.
「珍珠回路」免费吗？需要下载吗？Is Pearl Loop 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.