Chess.com -

: A training tool where you can "re-play" the remaining moves of a famous historical game against a bot, but without seeing the engine's evaluation until the end.

for a specific skill level (e.g., beginner vs. advanced). Gamification mechanics to make training more engaging. Chess.com

: Instead of random puzzles, this feature generates a "quest" based entirely on your recent game blunders . : A training tool where you can "re-play"

: Sometimes you want a wild "Gambit" game, and other times you want a slow, strategic grind. This would help players find the specific type of challenge they are looking for. 5. Interactive "Coach Chatbot" Chess.com

Which of these directions sounds most interesting to explore? Building Chess.com: Part 1 - Getting Started