[Comment "auto-generated from "]
 [Event "corr NBC II-671"]
[Site "Neue Version"]
[Date "????.??.??"]
[Round "?"]
[White "De Jong - MNb /"]
[Black "Main line 6.b4 Nd7 7.Nf3!"]
[Result "*"]
[ECO "B01"]
[Annotator "B├╝cker,Stefan"]
[PlyCount "84"]
[EventDate "2017.07.21"]

1. e4 d5 2. exd5 Nf6 3. d4 Nxd5 4. c4 Nb4 5. a3 N4a6 6. b4 Nd7 $5 ({Before I
saw your game I had considered:} 6... c6 7. Nf3 g6 8. Be2 Bg7 9. Be3 Nc7 10.
O-O O-O 11. Nc3 a5 (11... Bg4 12. Qd2 Nd7 13. Rfd1 Nb6 14. Ng5 Bxe2 15. Qxe2 a5
16. Rab1 axb4 17. Rxb4 Nc8 18. a4 Nd6 19. Bf4 Ra5 20. c5 Nf5 $11) 12. Qd2 axb4
(12... b5 13. cxb5 cxb5 14. Nxb5 Nd5 15. bxa5 Nc6 16. Bh6 Nxa5 17. Bxg7 Kxg7
18. Qb2 Nf4 19. d5+ f6 20. Rfe1) 13. axb4 Rxa1 14. Rxa1 b5 15. cxb5 cxb5 16.
Nxb5 Nd5 $44) (6... e5 $5 7. b5 c5 8. bxa6 cxd4 {admittedly seems a bit cruel
for correspondence chess. Maybe good enough for OTB?}) 7. Nf3 $1 (7. b5 Nab8 8.
Nf3 a6 $1 9. Bd3 (9. Nc3 axb5 10. cxb5 Nf6 11. Be2 e6 12. O-O c6 13. a4 Be7)
9... axb5 10. cxb5 g6 {PC says: +0.15}) 7... g6 8. Nc3 (8. b5 Nab8 9. Nc3 Bg7
10. Be3 a6 11. a4 axb5 12. axb5 Rxa1 13. Qxa1 e5 $1 {unclear}) 8... Bg7 9. Be2
(9. c5 $5 Ndb8 10. Be3 c6 (10... b6 $4 11. c6 $18) 11. Qd2 Bg4 $1 (11... Nc7 $6
12. Bh6 Bxh6 13. Qxh6 Bg4 14. Qg7 Rf8 15. Ng5 Ne6 16. Nxe6 Bxe6 17. Rd1 Nd7 {
is less reliable as White has two promising continuations:} 18. Qxh7 (18. d5))
12. Be2 Nc7 13. h3 Be6 14. Bh6 O-O 15. Rd1 Nd7 16. h4 Bxh6 17. Qxh6 f6 18. O-O
Rf7 19. Rfe1 Nf8 (19... Nd5) 20. Nd2 b5 $14) 9... c5 10. Rb1 O-O 11. O-O b6 12.
Be3 cxd4 (12... Bb7 13. bxc5 (13. Qd2 $1 {transposing}) 13... Naxc5 14. Qc2 Ne6
15. Rfd1 Rc8 16. d5 Nec5 17. a4 Re8 18. Nd4 e6 19. dxe6 fxe6 20. Ndb5 Qf6 21.
Qc1 Rf8 22. f3 a5 $11 {with a dynamic balance.}) 13. Nxd4 Bb7 14. Qd2 Nc7 15.
Rbd1 Nf6 16. Rfe1 e5 17. Ndb5 Qxd2 18. Rxd2 Ne6 19. Nd6 Bc6 20. c5 bxc5 21.
Bxc5 Bh6 22. Rdd1 Nxc5 23. bxc5 Nd7 24. Nde4 f5 25. Bc4+ Kg7 26. Bb5 (26. Bd5
Bxd5 27. Rxd5 Nb8 28. Nd6 Nc6 {about equal.}) 26... Nb8 27. Nd6 a6 28. Bxc6
Nxc6 29. Nd5 Ra7 30. g3 Bg5 31. f4 exf4 32. h4 Be7 33. Nxf4 Rb8 34. Kg2 Kg8 35.
Kh3 (35. Re6 Rd7 36. Nd5 Bxd6 37. Nf6+ Kf7 38. Rexd6 Rxd6 39. Rxd6 Rb2+ 40. Kf1
Rb1+ 41. Kf2 Rb2+ 42. Ke1 Ne7 43. Nxh7 Rc2 44. Ng5+ Ke8 45. Ne6 Rc3 46. Kf2
Rxa3 47. Nf4 Ra2+ 48. Kf3 Ra3+ 49. Kg2 Kf7 50. Nd3 Kg7 $14) 35... a5 36. a4 Rd7
37. Nxf5 Rxd1 38. Nxe7+ Nxe7 39. Rxd1 Rb4 40. Ne6 Kf7 41. Ng5+ Ke8 42. Nxh7
Rxa4 {Looks like a draw. White's extra pawn is probably not sufficient for a
win.} *