🧠🧠🧠 Vague Hague (Find the Blunder Exercise)

Find the Blunder Exercise: The audio will lead you through a series of moves from the beginning of a game. One player will blunder and the other will not punish them for it. Can you find the blunder and the best punishment?

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PGN for today's exercise:
Adapted from the game Jacobson vs Hoenlinger (Teh Hague, 1928).

1. d4 Nf6 2. Nf3 e6 3. c4 d5 4. Bg5 Be7 5. Nc3 O-O 6. e3 b6 7. Bd3 Bb7 8. O-O Nbd7 9. Rc1 c5 10. Qe2 dxc4 11. Bxc4 Nd5 12. Bxe7 Nxc3 13. Rxc3 Qxe7 14. Bb5 Nf6 15. dxc5 Ne4 16. Rc2 Nxc5 17. b4 Ne4 18. a3 Rac8 19. Rfc1 Rxc2 20. Rxc2 Qf6 21. Nd4 e5 22. Nb3 Ng5 23. Nd2 Qg6 24. e4 Nxe4 25. Bd3 Nc3 26. Qf1 Qh6 27. Qe1 e4 28. Bf1 e3 29. Qxe3 Qxe3 30. fxe3 Rc8 *

And the answer is...
26... Ne2+ 27. Bxe2 (27. Kh1 Qxd3) 27... Qxc2