# andrew kelley (blogs) — RSS Amplifier

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## [Introducing Lichess Puzzle Timer: A browser extension to help you do chess puzzles slower](http://catswhisker.xyz/log/2026/2/21/lichess_puzzle_timer/)

_2026-02-21 · The Cat's Whisker_

I created a little browser extension that adds a timer to the lichess puzzle trainer. Unlike other timers, this one prevents you from making a move until the timer expires to try to help you force yourself into actually calculating all variations.