👁️ 视野谜题Sightline Puzzle
在线视野谜题：每个数字表示从这一格出发，向上下左右四个方向“看”，能看到多少个白格（包括自己），涂黑的格子会挡住视线。涂黑的格子不能上下左右相邻，所有白格还必须连成一片。随机生成 5×5 到 8×8 的题目，可标记白格、撤销，记录最快用时。Sightline Puzzle online: each number says how many white cells can be seen from it looking up, down, left and right (counting itself), with shaded cells blocking the view. Shaded cells may not touch side by side, and all white cells must stay connected. Random 5×5 to 8×8 puzzles with dot marks, undo and best times.
点击格子：空白 → 涂黑 → 圆点（确定是白格）→ 空白；右键直接标圆点。数字格永远是白格。Tap a cell: blank → shaded → dot (surely white) → blank; right-click places a dot. Number cells are always white.
玩法说明与常见问题How to play & FAQ
「视野谜题」怎么玩？How do I play Sightline Puzzle?
数字格本身是白的。从数字格往四个方向数，一直数到碰到涂黑的格子或边界为止，四个方向加上自己的总数要等于这个数字。另外：涂黑的格子不能上下左右挨在一起（斜着可以）；所有白格必须连通，不能被黑格切成两半。没有数字的格子按你的涂法计算。Number cells are white. Count outwards from a number in all four directions until you hit a shaded cell or the edge; the four counts plus the cell itself must equal the number. Also: shaded cells may not touch side by side (diagonally is fine), and all white cells must remain connected. Cells without numbers follow your shading.
最大的数字说明什么？What does a big number tell me?
如果数字等于“行长 + 列长 − 1”，说明它所在的整行整列都是白格；数字很大时，先算出每个方向最多能看多远，可以排除很多格子。A number equal to row length + column length − 1 means its whole row and column are white. With large numbers, work out how far each direction can reach to rule cells out.
数字为什么变红？Why is a number red?
红色表示它能看到的格子已经比数字少了（被挡得太多），或者棋盘填完后与数字不符。Red means it already sees fewer cells than its number (too much is blocked), or, once the board is complete, that it does not match.
「视野谜题」免费吗？需要下载吗？Is Sightline 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.