The following are activities, practice games, and other information to help chess players improve their skills and knowledge of the game.

Try some classic chess problems

Chess PGN viewer.

Article with a chess widget.
(“The immortal game”).

Tactic training.
Find the correct moves. 1001 brilliant checkmates

Tactic training/Chess puzzles.
(Different layout)

Tactic training/Chess puzzles.
1001 brilliant sacrifices and combinations

Opening training.
Drag and drop opening moves.