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Get good at tactics.
60,000 puzzles, eight opponents with real personalities, and a full engine — all running in this tab. It works on a plane. It costs nothing. There is no ad anywhere in it.
60,000
puzzles, offline
8 + 1
bots, plus a full engine
24
lessons
0
ads, ever
Black to playrated 1240
A real puzzle. Move a piece — nothing else happens first.
Everything is local
The puzzle database and the engine both run in your browser. No game you play is uploaded anywhere.
An account is optional
Sign in only if you want your rating to follow you between this browser and the phone app. Nothing is gated behind it.
It remembers what you miss
Every puzzle you get wrong comes back on a spaced-repetition schedule until it stops catching you.
One account, both apps
The Android app and this share a rating, a streak and a set of achievements. Sign in on either.