⚫ 黑白棋Reversi
在线黑白棋（翻转棋）人机对战：8×8 棋盘，显示可落子位置，三档电脑难度，残局精确计算，支持悔棋、自动跳过无棋可下的一方。Play Reversi against the computer on an 8×8 board: legal moves highlighted, three AI levels with exact endgame play, undo, and automatic passes when a side has no move.
点击带小圆点的格子落子。键盘：先点一下棋盘，用方向键移动、回车 落子、U 悔棋。Click a square with a dot to play. Keyboard: focus the board, arrows to move, Enter to play, U to undo.
玩法说明与常见问题How to play & FAQ
「黑白棋」怎么玩？How do I play Reversi?
黑棋先下。每步必须落在能“夹住”对方棋子的位置：新棋子与己方另一枚棋子在横、竖或斜线上把对方连续的棋子夹在中间，这些棋子全部翻成你的颜色。无处可下时自动跳过，双方都不能下时棋局结束，子多者胜。Black moves first. Every move must outflank: place a disc so that a straight line (horizontal, vertical or diagonal) of opponent discs is bracketed by your new disc and another of yours — those discs flip to your colour. If you cannot move you pass; when neither side can move, the player with more discs wins.
电脑的难度有什么区别？How do the levels differ?
简单主要贪吃子；中等会看几步并重视角落和行动力；困难在后台迭代加深搜索，最后十几步会精确算到终局。Easy mostly grabs discs; Normal looks a few moves ahead and values corners and mobility; Hard runs an iterative-deepening search in the background and plays the last dozen moves perfectly.
为什么角落那么重要？Why are corners so important?
角上的棋子永远不会被翻转，还能以它为支点稳定整条边，所以要尽量占角、避免把角送给对手（别轻易下角旁边的格子）。A corner disc can never be flipped and anchors the edges, so take corners and avoid giving them away by playing next to them early.
和 Othello 有什么关系？Is this Othello?
玩法相同（标准开局的翻转棋），本站版本由我们自己编写，与任何商标无关。It uses the same rules as the standard-start game often sold as Othello, but this version is our own and not affiliated with any trademark.
「黑白棋」免费吗？需要下载吗？Is Reversi 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.