This is a new discipline. No Carlsen. No grandmasters rated 2800. Everyone starts from zero. Could you become the first World Champion?
The ranking is starting now.
All standard chess rules apply, plus one new rule:
If at least one legal non-capturing move exists, the player must make a non-capturing move.
Capturing is allowed only when no legal non-capturing move exists.
A piece under attack that cannot be captured because the opponent has quiet moves
Checkmate where the king could take the attacker in normal chess, but cannot here due to the rule
No theory yet — nobody has played enough games. You could be the first to name an opening after yourself.
Add Opening