Note that there is no helpmate available, it is a draw no matter what and no matter how. I can think of a case where there is +27 but is a draw. It is possible to go higher than that?
You can literally have queens on almost every single square on the board with a knight or two blocking checks and have stalemate. +27 isn't even close to the max
Right, but in a real game you can have at most 9 queens
Note that there is no helpmate available, it is a draw no matter what and no matter how. I can think of a case where there is +27 but is a draw. It is possible to go higher than that?