國際跳棋

Checkers: rules, tactics and practical play

Move, capture and crown kings against three levels of computer AI. This guide reflects the controls and win conditions in the current browser build. It is reviewed by the PocketJoy game-testing team and maintained by Long-Term New Media Limited.

Rules and winning conditions

You play the red pieces against the computer on the dark squares of the board. Tap one of your pieces and the board highlights every legal destination; tap a highlighted square to move. Ordinary pieces move one square diagonally forward. When an opponent's piece sits diagonally ahead of you and the square beyond it is empty, you may jump over it and capture. If another jump is available after the first, the game tells you that you must keep jumping — chains are compulsory, and that single rule underpins the whole tactical design of the game. Any piece that reaches the far row is crowned king, changes appearance to distinguish it from ordinary pieces, and may then move backwards as well as forwards, which greatly increases its mobility. Capture every opposing piece, or leave your opponent with no legal move, to win; if neither side can move, the game is drawn. Several computer difficulties are available, with the harder ones actively calculating chain jumps.

Match strategy

The heart of checkers is the trade you initiate. Because captures are compulsory, you can offer a piece deliberately, force the computer to take it, and then jump back over two or even three of its pieces with a chain you set up in advance. That retreat-to-advance idea is the most appealing thing about the game and the widest gap between a strong player and a novice. Before every move, check whether it places one of your pieces where the opponent can jump it — the check takes seconds and prevents most pointless losses. Leaving your back row untouched is a solid habit, because the opponent must reach your back row to be crowned, and pieces still sitting there seal off that route. In the middlegame, advance pieces side by side so they defend one another; a lone piece pushed forward is the easiest thing on the board to capture for free. On values, a king is worth roughly twice an ordinary piece because it moves backwards, and one king in the endgame can cover several directions at once. Endgames turn on control of the long central diagonal, where a king covers the most squares. When you are one or two pieces ahead, trading is correct: every exchanged pair magnifies your relative advantage.

Frequent errors

Beginners most often rush pieces forward chasing a king, which spreads the line thin and hands the computer a chain jump that takes two or three pieces at once. A material deficit in checkers is very hard to recover — fall two pieces behind and the game is usually lost — so a slower move is far better than a free gift. The second mistake is underestimating kings. A king moves backwards, and one in the endgame can cover several directions at once, so intercepting an opponent's piece near your back row matters more than pushing elsewhere; the cost of allowing a promotion is normally much higher than the gain from an extra square somewhere else. The third mistake is forgetting that compulsory capture binds both players. Many think only of being forced to capture and miss the reverse: you can deliberately create a position that must be taken and draw the opponent's piece exactly where you want it. The fourth is continuing to avoid exchanges while ahead. The player with more pieces should trade willingly, since each exchange increases the advantage; the player behind is the one who should avoid trades and preserve pieces while waiting for an error.

Who it's for

A good fit for anyone who enjoys board games but finds chess rules heavy going. Checkers can be learned in ten minutes — two piece types, ordinary and king, and two kinds of move, step and jump — yet it has real depth, and the compulsory-capture rule creates genuinely satisfying traps where giving a piece away turns out to be profitable, a counterintuitive experience few other board games offer. The game also holds a special place in mathematics: in 2007, after eighteen years of computation, a research team at the University of Alberta proved that standard 8×8 English draughts is a draw with perfect play on both sides, making it one of the most complex games ever completely solved. Several computer difficulty levels are available: the easiest is fine for learning the rules, while the harder ones actively look for chain jumps. A game usually runs ten to twenty minutes, and your win record is stored on your own device and survives closing the page.

Feature highlights

The sidebar offers three computer difficulty levels, switchable mid-game, which is convenient when you find the current setting too easy or too hard and would rather not restart. The status panel keeps a live count of your pieces and the computer's, so the material balance is visible at a glance — in checkers that is the single most important indicator, since a material advantage is close to a winning advantage, and the panel tells you whether to press or consolidate. During a forced chain capture the status line shows a must-keep-jumping notice, so you are never left thinking the game is stuck or misbehaving, which matters particularly for players new to compulsory capture. A piece crowned on the back row changes appearance clearly, so kings are not mistaken for ordinary pieces when calculating. The end-of-game screen distinguishes a win, a loss and a position with no legal moves, and shows your cumulative local win count. The language button flips the interface between Traditional Chinese and English on the spot.

Controls and match records

Everything is tap-based: select one of your red pieces and the board highlights every legal destination, then tap a highlighted square to move. This design hands rule enforcement to the game — compulsory capture, chain jumps and a king's ability to move backwards are all reflected in what lights up, illegal squares simply never appear, and an illegal move is therefore impossible. Beginners can concentrate on tactics rather than memorising rules. Since no dragging is involved, there is no risk of slipping a piece onto the wrong square, and mouse and touch feel identical; on a phone the board scales to a comfortable one-handed size. A restart button is always available. Your cumulative wins live in the browser's local storage and survive closing the page or rebooting; there is no account and nothing is transmitted to any server. Clearing browser data removes the record. Once the page has loaded, the game itself plays offline.

Rules Q&A

Reviewed by the PocketJoy game-testing team · Operated by Long-Term New Media Limited · hklongtermad@gmail.com