四子棋
四子棋是经典 7×6 重力棋盘游戏：把棋子落入列中，横向、纵向或斜向连成四子。
世界与任务
Every disc changes both the visible threat and the future landing height of a column. A strong move creates a line while limiting the opponent's reply.
The direct Battle loop keeps the board readable from the first drop to the Result. Replay resets the board so a different opening can be tested immediately.
游戏系统
The board has seven columns and six rows. A disc falls to the lowest open cell in its selected column; a full column cannot accept another disc.
A round ends when a player connects four discs horizontally, vertically, or diagonally, or when the board fills. Difficulty changes the AI response, not the win rule.
Hint highlights one tactical suggestion without auto-playing it; Undo restores the prior turn. Result offers Replay and Main, while local settings stay in this browser.
玩法说明
- 选择难度，再选择一列落下你的棋子。
- 读懂标示出的合法走法，规划横向、纵向或斜向连成四子。
- 使用提示获得一个战术建议，但不会自动替你落子。
- 在电脑之前连成四子，再用再玩一次或主页继续。
策略提示
- Prefer the center columns early because they support more horizontal and diagonal lines.
- Before making a drop, check the opponent's next winning column as well as your own immediate threat.
- Avoid creating a winning-looking cell that gives the opponent a forced reply on the next turn.
关卡与难度成长
Easy, Medium, and Hard change the opponent's decision pressure while keeping the same 7x6 board and four-line win condition.
Replayable rounds make progress visible through better openings, safer blocks, and fewer forced replies rather than account levels.
开发设计理念
Four in a Row uses the shared Classic Logic Lab shell, a responsive 7x6 gravity board, AI-turn lock, advisory Hint, reversible Undo, Result recovery, and browser-local preferences.
玩家与存档信息
四子棋是一般玩家可玩的浏览器策略游戏。不需要账号或购买；设置与可用的最佳结果只保存在此浏览器。
常见问题
- 棋子如何移动？
- 选择仍有空位的列，棋子会落到最低的空格。
- 如何获胜？
- 横向、纵向或斜向连成自己的四枚棋子。
- 进度会保存吗？
- 设置与可用的最佳结果只保存在此浏览器。
- 提示有什么作用？
- 提示会标出一个战术建议，但不会代替你落子。
- 棋盘填满时会怎样？
- 如果双方都没有连成四子，满盘就会结束本局；结果页可以选择重玩或回到主页。
