💡 点灯谜题Light Up Puzzle
在线点灯谜题：在白格里放灯泡，灯光沿横竖方向一直照到黑格或边缘为止，要让所有白格都被照亮，任意两盏灯不能互相照到；黑格上的数字表示它上下左右四格里正好有几盏灯。7×7、8×8、10×10 三种尺寸和三档难度，每题唯一解，可打点、撤销、提示和检查。Play the light up puzzle online: place bulbs in white cells — each shines along its row and column until it hits a black cell or the edge. Light every white cell without any two bulbs shining on each other; a number on a black cell says exactly how many bulbs sit directly next to it. Three sizes (7×7, 8×8, 10×10) and three levels, unique solutions, dots, undo, hints and checking.
点白格放一盏灯，再点一下变成小点（表示这里不放灯），第三下清除；右键直接打点。U 撤销。被照亮的格子是黄色；互相照到的灯会变红，灯太多的数字也会变红，数字刚好满足时变灰。Tap a white cell to place a bulb, tap again for a dot (no bulb here), and a third time to clear it; right-click places a dot directly. U undoes. Lit cells turn yellow; bulbs that see each other turn red, as does a number with too many bulbs, and a satisfied number turns grey.
玩法说明与常见问题How to play & FAQ
「点灯谜题」怎么玩？How do I play Light Up Puzzle?
每盏灯会照亮自己所在的格子，以及同一行、同一列上连续的白格，直到被黑格或边界挡住。目标是让所有白格都被照亮，但任何一盏灯都不能被另一盏灯照到。带数字的黑格表示紧挨着它的上下左右四个格子里恰好有几盏灯（斜角不算）；没有数字的黑格周围放几盏都行。A bulb lights its own cell plus every white cell in a straight line along its row and column until a black cell or the edge blocks the light. Light every white cell, but no bulb may be lit by another bulb. A black cell with a number has exactly that many bulbs in the four cells directly above, below, left and right of it (diagonals don't count); unnumbered black cells can have any number.
从哪里开始？Where should I start?
先看数字 4（四周全是灯）和数字 0（四周都不能放灯，打上小点），再看靠墙或靠角的 3、2：可放的位置刚好等于数字时就全放上。还有一个技巧：某个白格如果只有一个位置能照到它，那里一定是灯。Begin with 4s (bulbs on all four sides) and 0s (no bulbs around — dot them), then 3s and 2s against walls or corners where the free cells exactly match the number. Another key idea: if only one cell can possibly light a particular white cell, that cell must hold a bulb.
格子变成黄色是什么意思？What do the yellow cells mean?
黄色表示这一格已经被某盏灯照亮了。上方的「已照亮」显示白格被照亮的比例，到 100% 且没有任何冲突、所有数字都满足时就过关了。Yellow means the cell is already lit by a bulb. The “Lit” counter shows the share of white cells that are lit; reach 100% with no conflicts and every number satisfied to win.
「点灯谜题」免费吗？需要下载吗？Is Light Up 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.