Knightline: Chess opening trainer with SM-2 spaced repetition
Chessable competitor adding GitHub contribution graphs to opening memorization.

Automates the Woodpecker Method spreadsheet grind; chess training already crowded though.
Chess players, particularly those training tactically at intermediate levels.
Chess.com Puzzle Rush · Lichess Training · Chessable (spaced repetition courses)
Most puzzle trainers give you random puzzles. That can help calculation, but it also means you rarely see the same pattern twice, which makes it harder to build fast pattern recognition.
ChessWoodie organizes puzzles into courses where the same positions repeat across training cycles. The approach is inspired by the Woodpecker Method: solving the same puzzles repeatedly until the patterns become automatic.
You can try it directly in the browser. There’s a guest login if you want to jump straight into solving puzzles.
Curious to hear feedback from people who train tactics regularly.
Chessable competitor adding GitHub contribution graphs to opening memorization.
Research-backed pedagogy beats random quiz generators, but Tenuto and EarMaster exist.
Trains you to NOT look for tactics when none exist—genuine training gap.
Detects 10 tactical patterns without Stockfish—clever heuristics, tiny audience.
Chess puzzle new tab extension — clean design but others already do this.
FSRS scheduling as a service so you don't implement the math yourself.