Most gomoku games end the obvious way: somebody makes five in a row. But there are several other endings, and knowing them helps you manage a game sensibly — especially online, where the clock and your connection become part of the game. This article walks through every way a game can end.
1. A winning five
The normal ending. A player completes an unbroken line of five of their own marks, horizontally, vertically or diagonally, and wins immediately.
What counts as a winning five depends on the rule set:
- In freestyle, five or more in a row wins, whatever is at the ends.
- Under blocked ends (Vietnamese caro), a five wins only if it is not blocked by opponent marks at both ends. See the blocked-ends rule.
One practical tip: when you have a winning move, check it twice. It is surprisingly common to be so focused on a threat that you miss a four you already have — or to "complete" a line that is actually broken by an opponent mark you overlooked.
2. Resignation
Either player may resign at any time. Resigning is common when a player faces an unstoppable threat, such as an open four or a double threat that cannot be blocked with one move. There is no shame in resigning a lost position; it saves time for both players and is normal etiquette in serious play.
When you play the computer on the home board, the resign button ends the game as a loss. If you just want to stop playing without finishing, use the leave button instead.
3. A full board: the draw
If every point on the board is filled and nobody has a winning five, the game is a draw. On a 15×15 board this is unusual, because attacking players create threats long before the board fills. It happens most often between two careful defenders, and a little more often under blocked-ends rules, where lines can be killed permanently.
4. Running out of time
In timed games — typical online — each player has a clock. If your clock reaches zero on your turn, you lose. Online games on this site offer a choice of time controls when you look for an opponent, and an untimed option when you invite a friend.
Gomoku clocks usually run out for one of two reasons:
- Overthinking early moves. The opening feels important, so players spend too long on it and have nothing left for the tactical middle game, where time actually matters.
- Panic in a complicated position. When threats appear on several lines at once, players freeze. The fix is to practise reading threats quickly, so you know which threat to answer first.
5. Leaving an online game
Online, you can leave a game at any time with the leave button, but leaving is not free once the game is under way. If you leave before both players have made a move, the game is simply cancelled. After that, leaving counts as resigning. If your connection drops, you get a short time to reconnect — just reopen the page — before the game is counted as abandoned.
This is designed to protect the other player's time while still being forgiving about accidents such as a phone going to sleep.
6. Agreement to stop
Between friends, players sometimes agree to stop a game — for example when the board is nearly full and neither side can make progress. In informal games this is common sense. In online play, a game against a stranger ends through one of the formal routes above.
Recognising a lost position early
Knowing when a game is already decided helps you in two ways: you avoid wasting time in hopeless positions, and — more usefully — you learn to see the danger one move before it becomes hopeless.
A position is usually lost when the opponent has any of these:
- An open four. Both ends are empty, and you can only block one of them.
- A four and an open three created by one move. Blocking the four leaves the three free to become an open four. This is the famous four-three.
- Two open threes created by one move. You can only block one; the other becomes an open four. Some rule sets restrict this for the first player, but not freestyle or everyday caro.
The move before each of these is where the game was really decided. When you replay your losses, look for the move where your opponent placed a mark that sat on two of their lines at once. That intersection point is almost always the key.
Endings against the computer
The computer on the home board never resigns and never runs out of time, so every game against it ends with a five, your resignation, a full board, or you leaving. That makes it a good training partner for the most important ending of all: converting a winning position. When you have an advantage, try to finish the game cleanly with a forced sequence rather than waiting for the computer to blunder.
At the easiest level the computer sometimes misses your threats. Do not rely on that. Treat every open three as if a strong player were watching, and you will find the higher levels much less of a shock.
A note on sportsmanship
Gomoku is fast, and it is easy to feel that a loss was "bad luck". It almost never is: every loss in five-in-a-row has a concrete move where a threat went unanswered. Resigning politely, offering a rematch and replaying the game afterwards is the quickest way to turn that feeling into improvement.
Endings and learning
Each ending tells you something:
- You lost to a five you did not see: you need to scan all four directions around every opponent mark.
- You lost to a double threat: you let the opponent build two lines through the same point; learn to spot broken threes and potential intersections earlier.
- You lost on time: your threat-reading is too slow, or you spent too long on quiet moves.
- You drew on a full board: you probably defended well but missed chances to create your own threats.
If you sign in to your account, your games are saved and you can replay them move by move to find the moment the game turned.
Frequently asked questions
Can a gomoku game end in a draw?
Yes, if the board fills up with no winning five. It is rare on a 15×15 board.
Is it rude to resign?
No. Resigning a clearly lost position is normal and polite.
What happens if I disconnect during an online game?
You have a short time to come back by reopening the page. If you do not return in time, the game counts as a loss.
Does leaving a game against the computer count as a loss?
No. Leaving a computer game simply ends it. Resigning is recorded as a loss.
