The matchmaking algorithm is the unsung hero that determines exactly who you will face every time you press the 'Battle' button.
This article explores how developers design these algorithms to keep queue times short while maintaining a competitive environment.
Trophy and Rating Systems
Most modern strategy games utilize a modified version of the Elo rating system, originally designed for professional chess.
When you go on a massive winning streak, your trophy count inflates, and the algorithm begins matching you against significantly better players.
- If you are hovering around 50%, you are in the correct arena for your skill level.
- Queue times increase at the top of the ladder.
- If you drop trophies, the algorithm matches you against easier opponents.
The Free-to-Play Dilemma
The standard Elo system works perfectly for chess because all pieces are equal, but tower rush games feature upgradeable cards.
The system will try its best to match you with someone who has the same trophies AND a similar tower level.
| Matchmaking Factor | Weight |
|---|---|
| Current Rank | The system will always prioritize finding an opponent within a 50-trophy range |
| King Level / Card Levels | The system tries to match levels, but will abandon this check if the queue takes longer than 10 seconds |
True Fairness
By artificially capping all card levels to a specific number, the algorithm can rely purely on the Elo rating.
When levels are equalized, the matchmaking system shines, ensuring that the better player almost always wins.
