Kingside Lab

Kingside Lab does for chess.com players what the stats labs do for leagues. Type a username and it pulls in every game that account has ever played from chess.com's public records, newest first, in the background. Then you ask questions in plain English: "best openings as black in blitz", "how do I do after a loss", "how often do I lose on time", "what do I play against e4".

Every answer comes back as a number, a chart and the games behind it, with filters you can see and remove. The player page opens with the story already told: your record and ratings, a streak strip of the last thirty games, and "What stands out" — your best and worst time slots, the format that suits you, your best openings with each colour — plus a playing-profile radar of how you do against stronger players, how you bounce back and how you hold up late.

Like the sports labs, it reads questions with rules I wrote rather than an AI model, and every answer is a fixed, checked database query, so it never makes up a game. Around it: comparisons of two players with a scouting report, a league, a yearly "Wrapped", and optional accounts that email you your week in chess.