Illegal Chess Moves: Keep Your King Safe
See why a pinned piece cannot uncover an attack and why kings cannot touch.
Step 1 of 9
An illegal move breaks a rule or leaves your king under attack. A pinned piece cannot move away if that would uncover an attack on its king. Kings may never move next to each other.
Enter / Space action · H hint · ← / → demo · Esc close
Read the lesson text
An illegal move breaks a rule or leaves your king under attack. A pinned piece cannot move away if that would uncover an attack on its king. Kings may never move next to each other.