# Task ID: 28
# Title: Matchmaking Algorithm Optimization
# Status: pending
# Dependencies: 11, 20, 27
# Priority: medium
# Description: Refine the matchmaking algorithm to improve player experience by considering factors like player skill (rank/level) and reducing wait times. Implement tiered matching.
# Details:
Backend: Modify the matchmaking queue logic. Instead of pure random, prioritize matching players with similar ranks/levels. If no suitable match is found within a short time (e.g., 30s), expand the search criteria (wider rank range, then consider matching with AI or bots). Implement a timeout for matchmaking (e.g., 120s) before offering alternative modes.

# Test Strategy:
Simulate matchmaking with various player populations (e.g., many low-rank, few high-rank). Verify that players are matched with appropriate opponents or that search criteria expand as expected. Measure average matchmaking time.