Make a Match-3 Game With AI: Get the Board Logic Right
In a match-3 game you swap neighbouring pieces to line up three or more of a kind, and those lines clear, so your AI's main job is a board that can never end up wrong. Have it keep the board rules apart from the animation, and add your own twist only once swapping, falling and refilling are solid.
Why is such a simple game so easy to break?
Because of the chain reaction. Lines clear, pieces fall, new ones drop in, and those may form fresh lines, which clear again. All of that plays out over a second or two while the player keeps tapping.
Say your game is set in a rock pool, with shells to swap. These are the moments that go wrong:
| Moment | What can happen | What the rule should be |
|---|---|---|
| New board | It starts with ready-made lines | Deal again until there are none |
| A swap with no match | Nothing lines up | Swap back, at no cost |
| Pieces still falling | A tap grabs a moving shell | Ignore taps until all is still |
| After a clear | New lines appear by luck | Repeat until the board is calm |
| No moves left | The player is silently stuck | Say so and shuffle |
None of this needs clever code. It needs each moment to be decided, and your AI will skip the ones you never mention.
How small can you start?
An eight-by-eight board, five kinds of shell, and one goal: 1,000 points in 20 moves. No special pieces and no map of levels. If swapping feels nice with that, the rest can follow.
What is the mistake that wrecks these games?
Putting the rules inside the animation. If the game clears a shell when its little pop animation finishes, then a slow phone or a fast tap leaves the picture and the real board disagreeing. You then see a shell that does not exist, or a gap with a piece secretly in it.
So keep the board as a plain grid of data, and work everything out at once, step by step. The animation only plays those steps back afterwards. It may lag and the board still stays right.
How do you put it together?
- The board as data, with no pictures. Your AI can print it as letters.
- Swaps and finding lines of three or more.
- Clearing, falling, refilling, and repeating until calm.
- Spotting that no move is left, then shuffling.
- Drawing it all, with animation and sound. This genre lives on feel, so give it time: small pops, a rising note on chains.
- The score and the goal.
- Your own twist.
That twist is what makes the game yours, so think of something that changes how you choose a move. In the rock pool, a tide could rise every five moves and flood the bottom row, so that matches down there push the water back. Suddenly the best swap and the safest swap are different swaps.
Paste this to your AI
Build a small match-3 game: an 8 by 8 board, five kinds of piece, swap two neighbours, lines of three or more clear, pieces fall, new ones drop in, and a goal of 1,000 points in 20 moves.
Before writing the game, draw the board's life as a state machine in a Mermaid diagram: waiting for a swap, swapping, swap rejected, clearing, falling, refilling, looking again, no moves left, reshuffling. Say which states ignore my taps. Build from that.
Keep the board rules completely apart from the animation, so the board stays right even if the animation is skipped.
Do not tell me the board logic is right. Generate many boards, play many random moves without drawing anything, and show me how many boards began with a line, how many ran out of moves and the longest chain you saw. If you did not run that, say you do not know.
Or skip this and connect the MCP: your AI then finds all of this by itself.Connect the MCP
How to check it worked
- Tap like mad. During a chain, tap everywhere. Nothing should move until the board is still.
- Swap with no match. The pieces should slide back and cost you no move.
- Reload twenty times. No board should start with a line already made.
- Ask for a stuck board. Have your AI set one up. The game should say so and shuffle.
- Skip the animation. Ask for a switch that turns it off. The game should play exactly the same.