18/20, got number 9 wrong because Nxh7 and Bxh7 looked pretty equal to me (as they seem to be according to mc4chess). Somehow got 15 wrong even tho I saw that Qf6 was good :< Morally 19/20 because question 9 is silly
edit: used 18ish minutes total
edit2 heh i did the exact same error with 15 as mc4chess, somehow my brain put a knight on d2 when qxh3 would win a pawn