CRX id
imoijdpipccgjlimefkhkggooecpidpp
imoijdpipccgjlimefkhkggooecpidpp
Description from extension meta
Practice chess tactics
Image from store
Description from store
This extension has several different modes to train different skills in chess.
A free version availible at https://chrome.google.com/webstore/detail/tactical-tactics-free/keiookbkgfkglpbooppdhoainanmpcmj/