Overloading
One defender can't do two jobs.
Tactics
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- Play Chess: Online, vs Computer or a Friend
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- Chess Puzzles: Free Rated Tactics Trainer
- Daily Chess Puzzle: Puzzle of the Day
- Learn Chess: Free Interactive Lessons
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- Free Chess Tools: Rating Calculators, Clock & More
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- Guess the Elo
- Chess Grid daily trivia
- Duck Chess: Rules & Free Online Play
- Fog of War Chess: Rules & Free Play
- Vote Chess — play as a team with the community
- Free Online Chess Tournaments Every Hour
- Free Chess Analysis Board with Stockfish