Flying Leathernecks

Mihnea Costachi – Sebastian Mihajlov
35th World Youth Chess Championship Under-16; Porto Carras, November 2, 2015
King’s Indian Defence E70

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nge2 0-0 6. Ng3 a6 7. Be2 Nbd7 8. h4 c5 9. d5 b5!? 9. ... h5 10. Bg5 b5!? transposes into the game Rapport – 丁立人 (Dīng Lìrén), Olivier Breisacher Memorial, Biel 2013. 10. cxb5 axb5 11. Nxb5 Ba6 12. a4 Ne8 13. 0-0 Nc7 14. Ra3 Bxb5 15. axb5 Rb8 16. Ra7 Ra8 17. Ra3 Rb8 18. Qb3 Bf6 19. Bg5 e6 20. Bxf6 Qxf6 21. Ra7 Qd8 22. h5 Nb6 23. hxg6 hxg6 24. Rd1 Nc8 25. Ra3 Nb6? Black should have played 25. ... exd5 immediately, in order to answer 26. Qe3 by 26. ... Qf6 and 26. exd5 by 26. ... f5!? keeping cool. 26. Qe3 exd5

27. Qh6! 27. Nf5! Qf6 28. Qh6 leads to a mere transposition of moves. 27. ... Qf6. Alternatively, 27. ... Ne6 28. Nf5 (threat: Ra3-h3) 28. ... Qg5 29. exd5 is a more prosaic win. 28. Nf5! Rfe8 29. Rh3 1 : 0. In fact, mate follows in three moves at most.