Nevertheless, this game is a good example of what I was capable of when warmed up. White with 5. d5 enters a falsely seductive line against the Slav, one which you won't find in any opening books, for good reason. Black correctly reacts aggressively and soon regains the gambit pawn, along with forcing the win of the exchange (although alternative play on move 9 is objectively better). Despite Black's material advantage, White has good attacking possibilities and some compensating factors, leading to a tactical tussle. White leaves his remaining rook out of the fight - a classic amateur mistake - and then Black is able to force enough simplifications to segue into a clearly won endgame.
The Slav has a deserved reputation as a solid defense, but it can also be a punishing one when White does not respect it, as this game shows.