How do I earn XP, and what affects the amount?

XP (eXperience Points) is awarded only the first time you solve a puzzle (replays give none).

Puzzle XP comes from a time bonus and a difficulty bonus based on the solution length, then modified by:

• First-try bonus: x1.5
• 3-star bonus: x1.25
• Daily streak bonus: up to +60% at a 30+ day streak
• Hint penalty: taking a hint reduces XP instead of boosting it
• Rating-gain bonus: a small XP top-up if the puzzle raised your rating
• Rush and Survival award a flatter XP rate per solve (plus a small bonus for a new personal best), since they aren’t rated.