this is a classic double stalemate...1. Ng5 !!
It's more of a single illegal move lifting the check on the bK.
There are very simple chess variants which have a triple check(mate). like Patrol chess. The Patrol rule is one can only check or capture with a unit (piece or pawn) that is guarded by another unit of the same color. The diagram below even shows a quadruple checkmate! 1.Ng6####
w/ this variant stuff i feel like ur taking this ALL too seriously. im putting u in timeout.
w/ this variant stuff i feel like ur taking this ALL too seriously. im putting u in timeout.
Good luck!
w/ this variant stuff i feel like ur taking this ALL too seriously. im putting u in timeout.
As long as you consider all of chess a pastime, it will never get serious. Just stay away from the money 
'Serious chess'.
'Practical chess'.
Unless one is a professional player of some kind - coach or competitor or money player - or chess programmer - works in a chess-related industry -
then those two phrases each contradict themselves?
Not quite.
Each person decides for him/herself what something is ...
and also how he/she will use the semantics.
I would think though - that most people around the world regard chess as neither serious nor practical. 
In some universities - apparently you can get some 'credits' for chess.
'College credits' certainly could qualify as 'practical' and 'serious'.
And it was already a six-attack. Sexto-attack.
Uh oh. That word ...
Bishop better at c7 ?
Where it is now - maybe that qualifies as X-Ray attack.
then what would be a MRI attack ??
and btw, Tech_KO needs his cat scanned...
And - when I use the React emoji on another post - they reverse in order !
it is impossible unless u move two pieces in one turn, which is illegal
Ah, but not if you castle. dun DUN DUN!!!!!
Both triple check and triple checkmate are legally impossible in chess.
So is both players in check.
So is both players in checkmate.
All impossible.
But I posted recently about the thing I think comes closest to Triple Check.
I call it Discovered Double Disappearance Check.
Say you had a black King at e6 and a white pawn at e5.
White's Queen slides up to g4 and says hello to Black's K.
Qg4ch ...
so then black's f7-pawn slides up to f5 with a double square move and says "bye - your Qcheck is blocked"
But then white's e-pawn goes exf6 en passant ...
black's f5-pawn Disappears from the board - and his King is once more in check by white's Queen -
but white's e-pawn also uncovers and discovers white's Rook at e1 also coming in to join the party .... so Black's King is now in check from there too ...
Three white pieces participate in putting black's King in check.
But its only double check not triple. Close but not quite there.