Couldn’t figure a reliable way to mate, found the game and holy hell am I impressed. Black made the mistake of trying to pin White’s queen, White played Bc7 after that forcing a second mistake of moving the rook.

Solution for mate in 5

!Re8+ Kxe8. Qe4+ Ne6. Qa8+ Rd8. Qxd8+ Nxd8. Rxd8#!<

Full game