patzer2: Here's my look at the game and today's Friday puzzle position (19...?) with the chessgames.com Opening Explorer and Deep Fritz 14x64:<1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5> This is the second most popular move. Most often played is 4. Bg5 as in
E Inarkiev vs I Lysyj, 2015.
<4... Nfd7 5. f4 c5 6. Nf3 Nc6 7. Be3 Be7 8. dxc5> The popular choice here is 8. Qd2 as in
Z Almasi vs Lenderman, 2015.
<8... O-O 9. Qd2 Nxc5 10. O-O-O a6 11. Qf2 b6 12. g4 f6 13. exf6 Bxf6 14. Bxc5?!> Trading off the dark square Bishop improves Black's position. Instead, White should maintain the tension with 14. Qd2 = when play might continue Qc7 15. Rg1 Bb7 16. g5 Bxc3 17. Qxc3 Rxf4
18. Bxf4 Qxf4+ 19. Kb1 d4 20. Nxd4 Rd8 21. Bxa6 Nxd4 22. Bxb7 Nxb7 23. Rgf1 Qd6
24. Qe3 e5 25. c3 Qg6+ 26. Qd3 Qxd3+ 27. Rxd3 Ne6 28. Rxd8+ Nexd8 29. Kc2
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<14... bxc5 15. Qxc5 Qc7 16. f5?> This concedes Black a clear advantage,
and overlooks a last opportuity to equalize with 16. Ne5! when play might
continue 16...Bb7 17. Bg2 Bxe5 18. fxe5 Qxe5 19. Rhe1 Qg5+ 20. Qe3 Qxe3+ 21. Rxe3 Rf2 22. Bh1 Nd8 23. h4 =.
<16... Rb8 17. fxe6 Bxe6> This wins but an even stronger move is 17... Qf4+ when play might continue 18. Nd2 Nb4 19. Kb1 Bxe6 20. Nb3 Rfc8 21. Qa7 Bxg4 22. Bxa6 Ra8 23. Rdf1 Qxf1+ 24. Rxf1 Rxa7 25. Bxc8 Bxc8 26. a3 Bxc3 27. bxc3 Nc6
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<18. g5> This loses quickly. Putting up more resistance is 18. Kb1 when play might continue 18...Rfc8 19. Bxa6 Nb4 20. Qxc7 Rxc7 21. Nb5 Rxc2 22. Nbd4 Bxg4 23. Nxc2 Nxc2 24. Kxc2 Bxf3 25. Rhf1 Rxb2+ 26. Kc1 Bxd1 27. Kxd1 Kf7 28. a4 Rxh2
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<18... Bxc3!> This begins Black's winning combination.
<19. Qxc3 Qf4+!> This strong follow up to 18...Bxc3! 19. Qxc3 solves today's Friday puzzle.
<20. Nd2> If 20. Kb1, Black wins with 20...Qxf3 21. Qxf3 Rxf3
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<20...Nb4 21. Qa3> If 21. Kb1, Black wins following 21...d4 22. Qa3 Bxa2+ 23. Kc1 (23. Ka1 Nxc2+
) 23... Rfc8 24. c3 Qf5 25. Bc4+ Bxc4 26. Qa4 Nd3+ 27. Kb1 Nxb2+ 28. Ka1 Nxa4
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<21... Rfc8 22. Bd3> If 22. c3, Black forces mate after 22...d4 23. Kb1 Bf5+ 24. Kc1 dxc3 25. Qb3+ Kh8 26. bxc3 Rxc3+ 27. Qxc3 Nxa2#.
<22... Nxc2!> Here, this surprise move is the strongest follow up.
<23. Bxc2 Bf5 24. Qc3> If 24. Kb1, Black wins after 24...Bxc2+ 25. Ka1 Bxd1 26. Rxd1 (26. Nb1 Rc1
) 26... Qxd2
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<24... Rxc3 25. bxc3 Qe3 26. Rdf1 Be4> This wins easy, but also strong is 26... Qxc3! 27. Rxf5 Rb2 28. Kd1 Qxc2+ 29. Ke2 Qxd2+ 30. Kf3 Qg2+ 31. Kf4 Qe4+ 32. Kg3 Rg2+ 33. Kh3 Qg4#.
<27. Rhg1 Qxc3 28. Nxe4 dxe4 0-1> White resigns in lieu of 29. Rd1 (29. Kd1 Rd8+ 30. Kc1 Rd2
) 29... Qa3+ 30. Kd2 Rd8+ 31. Ke2 Qf3+ 32. Ke1 Qe3+ 33. Kf1 Rf8+ 34. Kg2 Qf3#.