6 Important Concepts that Improve Your Understanding of Chess Tactics –

Chess Tempo: Chess tactics on the App Store

Chess Tempo mobile

Tactics from the Old Masters - Chess Lessons

My First Book of Chess Tactics

Chess Tactics Wizardry: 15 Patterns You Need to Learn

Better Chess Training: Chess Tactics: In-Between Move (Zwischenzug)

Chess Tactics – Pins

Sacrifice - Chess Terms

Chess Tactics: Tempo Moves!

Reached 365 days on r/chesstempo! Easy even if you usually leave standard puzzles overnight. No need 2nd account or griefing. Just do blitz on old site (old.chesstempo.com/chess-tactics.html) and standard on new site.