[Event "Quintagonal Tournament"]
[Site "London"]
[Date "1882.??.??"]
[Round "?"]
[White "Blackburne, J. H."]
[Black "Mason, James"]
[Result "1-0"]
[Openingcode "21"]

1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 Bg7 5. d4 d6 6. O-O h6 7. c3 Nf6
{
Inferior to 7. ... Qe7 or 7. ... Nc6.
}
8. e5! dxe5 9. Qb3 O-O 10. Nxe5 Qe8
{
If 10. ... Be6, 11. Bxe6 fxe6 12. Qxe6+ Kh7 13. Qf5+ and White can draw if he likes.  Or, instead of 12. Qf5+, he may play 12. Qxb7 with advantage.
}
11. Ng6 b5! 12. Bxb5
{
The only move to save the Piece.  But this it does effectually enough, and Black has lost his pawn.
}
12... Qe4 13. Ne5 Bb7 14. Nf3 Ng4 15. Re1 Qg6 16. Be2 Qc6 17. Bd3 Nf6
{
Necessary to prevent Be4.  Also having in mind the practicability of ... g4.  By his next move White guards the weak spot, giving his Knight freedom of movement to e5, if advisable.
}
18. Qc2 Nbd7 19. Na3 Rae8 20. Bd2 a6 21. Rxe8 Rxe8 22. Re1
{
Relying upon his superior strength on the Queen side.  The Pawn position would be lost for Black.
}
22... Rxe1+ 23. Nxe1 Qe6 24. Bc4 Nd5 25. Qd3 N7f6 26. Nac2 Bf8 27. Qe2 Ne4
28. Nf3 Bd6 29. Bc1 a5 30. Nd2 Nxd2
{
30. ... f5, besides being hazardous in itself, would probably lead to the loss of the a-pawn after 31. a4 and 32. Nb3.  The Black Queen holds her ground next move, rather than yield the open file.
}
31. Bxd2 Kf8 32. Qxe6 fxe6 33. Ne1 Ke7 34. Nd3 Nb6 35. Bb3 Bd5 36. Bxd5
exd5
{
This greatly strengthens the Queen side, and reduces the position to a draw—on its merits—though a difficult one.
}
37. b3 a4 38. Kf2 axb3 39. axb3 Nd7 40. Kf3
{
White conducts the remaining operations with great skill.  In reply to this move the Black King perhaps ought to go to e6—but still there is no harm done.
}
40... Kf6 41. c4 dxc4 42. bxc4 Kf5?
{
This, however, is an obviously fatal error.  42. ... c5 was the obvious move to draw.
}
43. c5! Be7 44. Ba5! g4+ 45. Ke2 Ke4 46. Bxc7 f3+ 47. gxf3+ gxf3+ 48. Kd2
Kxd4 49. c6
{
An uncommon termination.  The Knight cannot be saved, else the Pawn Queens.
}
49... Bg5+ 50. Kc2
1-0

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