The blunders are all there on the board, waiting to be made

In this video I am analyzing a game from ongoing 2019 Hunan International Open where in round 6 Russian GM Alexander Motylev makes a terrible blunder in a winning position, to which Chinese GM Zeng Chongshen answers with a queen sacrifice and forces an immediate resignation! In the end of the video as usual you can solve the daily puzzle!
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Zeng Chongsheng (2551) vs Alexander Motylev (2654)
Hunan International Open 2019 round 06
C59 Italian Game: Two Knights Defense, Steinitz Variation
1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 bxc6 8. Be2 h6 9. Nh3 Bc5 10. d3 O-O 11. Nc3 Nb7 12. O-O Bxh3 13. gxh3 Qd7 14. Bg4 Nxg4 15. hxg4 f5 16. gxf5 Rxf5 17. Ne4 Raf8 18. Qe2 Rf3 19. Kh1 Qh3 20. Nxc5 Nxc5 21. Be3 R8f5 22. Rg1 Rh5 23. Rg2 Ne6 24. Rag1 Kh8 25. Bd2 Nd4 26. Qe4 Rf7 27. Bf4 Rxf4 28. Qh7+
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