YOUR GOLD DISCS. YOUR NEXT IDEA.
Four in a Row vs computer. Find your next move.
A quiet round to try a new opening or practise spotting diagonals. Pick a difficulty, drop your first gold disc, and see what the computer does next.
- You play GoldYou make the first move
- 3 difficulty levelsEasy, Medium and Hard
- Solo saveReturn to your position
Easy often chooses a random legal column.
Medium and Hard search possible replies.
Change difficulty without clearing the board.
Start a solo round
- Open Vs Computer. The main button starts or restores your solo board with the saved difficulty. The default level is Medium.
- Choose a level when you want to. Press Vs computer in the game to open Easy, Medium and Hard. Selecting a level closes the popup; Cancel leaves the game unchanged.
- Drop a gold disc. Choose a column and let it fall. The computer controls Coral and replies after your turn.
What changes between Easy, Medium and Hard
Easy
A forgiving opponent that often chooses a random available column. It can miss threats, giving you room to experiment with the rules and controls.
Medium
Looks for an immediate win or block and searches up to four half-moves ahead. A half-move is one player dropping one disc. It scores open lines and central positions.
Hard
Searches up to seven half-moves with a larger calculation budget. It can see longer sequences, but it is a bounded practice opponent, not a perfect solver. No level is described as unbeatable.
Open Vs computer again to change the level. Your current board stays in place, and an unfinished computer calculation is replaced by a search at the new level.
Practise the spaces underneath a threat
First check for a winning drop of your own. Then look for an immediate threat in the other color. A row of three is dangerous only when the fourth space can actually be reached.
Pay attention to what your disc supports. Filling a low gap may give the computer access to the winning space immediately above it. Try building two separate threats, and compare how the stronger level answers.
The rules guide explains gravity, winning lines and draws. To practise with someone sitting beside you, switch to two-player mode.
Pause your practice and come back
Your computer game and local two-player game have separate saves. Refreshing the computer page restores its board and any pending computer turn. Clearing browser site data removes those saves.
New round and Play again keep you in computer mode and preserve your level. During the computer’s turn, the board cannot be used to place its disc. To test your ideas against a person, create a private invitation or browse the mode overview.
GOOD TO KNOW
Four in a Row Vs Computer FAQ
Who starts against the computer?
You play Gold and start every round. The computer plays Coral.
Where do I change the difficulty?
Press Vs computer in the shared game menu. Choose Easy, Medium or Hard in the popup. There is no separate difficulty bar under the board.
Will changing the level reset my game?
No. The board is preserved. A pending computer move is recalculated at the new level.
Is Hard unbeatable?
No. Hard uses a deeper but limited search. It is a stronger practice opponent, not a perfect Four in a Row solver.
Does solo mode need a private room?
No. Computer play runs in your browser and has its own local save. Private rooms are for invitations to another person.
See the fourth disc before it falls.
Start a solo round and try one new idea.
Play Four in a Row vs Computer