patzer2: Here's my look at the game and today's Wednesday puzzle position (27...?) with the chessgames.com Opening Explorer (OE) and Deep Fritz 14x64:<1. d4 Nf6 2. Nf3 e6 3. c4 Bb4+ 4. Bd2 Qe7 5. g3 Nc6 6. Bg2> The most popular move according to the OE is 6. Nc3 as in M Al Sayed vs Bologan, 2014.
<6... Bxd2+ 7. Nbxd2 O-O 8. O-O d6 9. e4 e5 10. d5 Nb8 11. b4> This is the second most popular move here (36 games
in the OE ).
The most popular move (85 games in the OE) and my preference here is 11. Ne1 as in W So vs Y Kuzubov, 2009.
<11... Bg4 12. Qc2 a5 13. a3 Na6 14. Qc3 axb4> With this move the game
enters previously unexplored territory, where Fritz assesses the position as fully equal.
<15. axb4 Bxf3 16. Bxf3 c5 17. dxc6 bxc6 18. Ra5> Fritz rates this about equal. However, I think White can do better with 18. Be2! when play mightcontinue 18... Qb7 19. Rfb1 Rad8!
[Not 19... Rfb8? 20. c5 dxc5? (20... d5 21. Bxa6 Rxa6 22. Rxa6 Qxa6 23. exd5 Nxd5 24. Qxe5 ) 21. bxc5 Qc7 22. Rxb8+ Qxb8 23. Bxa6 ]
20. c5 Nc7 21. cxd6 Rxd6 22. Nc4 Re6 23. Na5 Qb6 24. Qc2 Nb5 25. Bxb5 cxb5 26. Rd1 h5 27. Nb3 Rd6 28. Nc5 Rfd8 29. Qe2 Qc6 30. h4 Rxd1+ 31. Rxd1 Rxd1+ 32. Qxd1 Nxe4 33. Qf3 f5 34. Nxe4 Qxe4 35. Qxh5 Qxb4 36. Qe8+ Qf8 37. Qxb5 =.
<18... Nc7! 19. Nb3 Ne6 20. Rd1?!> This appears to be a slight mistake which allows Black to steal the initiative and secure an advantage.
Instead of 20. Rd1?!, White should play 20. c5 dxc5 21. Nxc5 Nd4 22. Kg2 Nb5 23. Qc4 =.
<20... Rad8 21. Kg2 Ng5 22. c5 d5 23. Nd2?> This is a mistake which loses immediately.
In order to maintain drawing chances, White needs to play 23. exd5 when play might continue 23...e4 24. Be2 Nxd5 25. Qc4 Qd7 26. Nd4 Qh3+ 27. Kh1 Nf6 28. Raa1 Ng4 29. Bxg4 Qxg4 30. Qe2 Qh3 31. f4 exf3 32. Nxf3 Qg4 33. Rxd8 Rxd8 34. Rf1 Ne6 35. Qe1 Rb8 36. Ne5 Qxb4 37. Qxb4 Rxb4 38. Nxf7 Rc4 39. Nd6 Rxc5 (-0.39 @ 22 depth, Deep Fritz 14).
<23... dxe4 24. Be2 Nd5!?> This gives Black a strong advantage (-1.26 @ 20 depth, Deep Fritz 14).
However Black has a stronger move available in 24... Qe6! when play might continue 25. Nf1 Qh3+ 26. Kg1 Nd5 27. Qc4 Nf3+ 28. Kh1 Qf5 29. Rda1 Nd4 30. Kg2 Qe6 31. Ra7 Rb8 32. Ne3 Nxe3+ 33. fxe3 Qxc4 34. Bxc4 Nc2 35. Rc1 Nxe3+ 36. Kf2 Ng4+ 37. Kg1 Rxb4 38. Rc7 Ne3 39. Ba6 Rfb8 40. Rxc6 Kf8 41. Rc8+ Rxc8 42. Bxc8 Ke7 43. c6 Kd8 44. Kf2 Nd5 45. Bf5 g6 (-2.98 @ 20 depth, Deep Fritz 14).
<25. Qa1> White can put up more resistance with 25. Qa3 but Black still wins after 25...Qe6 26. h4 Nf4+ 27. gxf4 Rd3 28. Bxd3 Qh3+ 29. Kg1 Qg4+ 30. Kf1 Qxd1+ 31. Kg2 Qg4+ 32. Kf1 Nh3 33. Nxe4 Qd1+ 34. Kg2 Nxf4+ 35. Kh2 Qf3 36. Bf1 Qxe4 37. Ra8 Ne6 (-2.14 @ 20 depth, Deep Fritz 14).
<25... Qe6!> (-2.54 @ 20 depth, Deep Fritz 14). Here after 25...Qe6! Black is clearly winning.
<26. h4 Qh3+ 27. Kg1 Ne3> This follow-up to the strong 24...Nd5!? and the clear winning 25...Qe6! solves today's Wednesday puzzle.
<28. fxe3 Qxg3+ 29. Kf1>
If 29. Kh1 Black wins easily after 29...Qxh4+ 30. Kg1 Qg3+ 31.Kh1
[31. Kf1 Nh3 32. Nxe4 (32. Bh5 Qf2#) 32...Qg1#]
31... Nf3 32. Nxf3 exf3 33. Bxf3 Qxf3+ 34. Kh2 Rxd1 35. Qxd1 Qxd1 (mate-in 19 to follow, Deep Fritz 14).