I like best the official rule set of the world association. The most consistent one one can have. It is practically 1:1 transferred to here except for the case which is technically not feasible (fortresses).
So good job FIDE, playchess, chess24 and last but not least, lichess. Thanks @lovlas and friends!
So good job FIDE, playchess, chess24 and last but not least, lichess. Thanks @lovlas and friends!