Chess Tactics Puzzle Training : Chesstempo.com Tactics and Puzzle

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Chess Tempo: Chess tactics on the App Store

Grandmaster Guide to Learn and Improve Chess Tactics

How did I miss that?? - by Dan Bock

Just broke 1900 on chesstempo! Started playing 15 months ago and this resource has been extremely beneficial and I would credit as one of the biggest factors in my chess growth. Results

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