MQ-Chess Math5 min read•2024-11-18
What is Loss Index? Understanding Your Real Chess Weaknesses
IK
Ivan (IvanKulkin)
Creator of MQ-Chess
# What is Loss Index?
Your **MQ-Chess Loss Index** measures the exact percentage of win-probability you surrender per move on average, adjusted for move complexity.
## Score Tiers
- **< 3.5%**: Grandmaster Precision
- **3.5% – 5.5%**: Master Tier
- **5.5% – 7.2%**: Expert & Candidate Master
- **7.2% – 9.5%**: Strong Club Player
- **9.5% – 12.5%**: Intermediate
- **> 12.5%**: Novice / High Volatility
Lower Loss Index means fewer costly mistakes in critical positions.
Article Q&A
Q: What is a good MQ-Chess Loss Index?
A: Grandmasters average under 3.5%. Club players typically range from 6.0% to 9.5%. Ratings above 11% indicate high decision volatility.