Why you should look a gift horse in the mouth

[Event "Rated Rapid game"]
[Site "https://lichess.org/nQaoGeJE"]
[Date "2018.03.11"]
[Round "-"]
[White "marinkatomb"]
[Black "kondukator0"]
[Result "1-0"]
[UTCDate "2018.03.11"]
[UTCTime "23:06:10"]
[WhiteElo "2126"]
[BlackElo "2082"]
[WhiteRatingDiff "+11"]
[BlackRatingDiff "-10"]
[Variant "Standard"]
[TimeControl "600+2"]
[ECO "D12"]
[Opening "Slav Defense: Exchange Variation, Schallopp Variation"]
[Termination "Normal"]
[Annotator "lichess.org"]

1. Nf3 d5 2. d4 Nf6 3. c4 c6 4. e3 Bf5 5. cxd5 cxd5 6. Nc3 { D12 Slav Defense: Exchange Variation, Schallopp Variation } Qb6 7. a3 e6 8. Bd2 Nc6 9. Be2 a6 10. O-O Bd6 11. b4 Qd8 12. b5 axb5 13. Nxb5 Bb8 14. Ne5 Nxe5 15. dxe5 Bxe5 16. Bb4 Bxa1 17. Qxa1 Qb6 18. Rc1 Kd7 19. Qe5 {A blunder, Rc7 is best} Rac8 20. Nc3 Rhg8 21. Bb5+ Kd8 22. Ba5 Nd7 23. Bxb6+ Nxb6 24. Qd6+ { Black resigns. } 1-0