Have you done this legendary checkmate before?

exact combination of moves is one thing
but if you haven't castle, one of your rooms hasn't moved, and you're up a queen and another rook against king, for example, you can certainly force a castle-mate without your opponent needing to help you, as long as they don't resign

@Pranavgrandmaster123 said in #5:

O-O-O checkmate is not possible without playing the same person from both side or making the other person do that
it is a thing which is not possible in real games
even though i liked the game a lot
U can do a check mate if u don't move the rook and king which you want to castle.
It is possible to do a checkmate like that in real game.

but that rare it has a chance of 1 in a trillion chance

@Pranavgrandmaster123 said in #13:

but that rare it has a chance of 1 in a trillion chance
That is why i called it the legendary checkmate

not exactly one in a trillion when there's 460 million lichess games...

Not sure why people make such a big deal out of castle mates (if the opponent is down enough material, anyone can arrange one).

I would've greatly preferred to end things quicker: 21... Qg2+ 22 Kf4 Rh4+ 23 Ke5 Nd7#, for example.

yeah once. My opponent rage quit (was in person)