Move 29
 

Their move combines re-blocking the f file with the threat of a quick mating attack. 29...Rxb6 30.Qh3+ Kg7 31.Qh7+ Kf6 32. Qg6+ Ke5 33.Re1+ and mates. So we have to defend against this. At first glance the only two possible moves for us are 29...Qg7 and 29...Qh6. The latter has the advantage of discouraging their rook from moving off their back rank next move (because of ...Qc1+).

Is there anything else for us?

EDIT: Perhaps 29...Qf6 is another possibility because if 30.Qh3+ Kg8 seems okay.

29...Qf6 30.Qh3+ Kg8

then 31. Qh7++ , no?

Oops, my mistake. We then 31, ,, Kf8 and
expect to soon exchange Queens, while down
three pawns...

Indeed, and an exchange of queens is unavoidable for us if they choose to steer it that way. But we still have drawing chances, I think, because of the vulnerability of their two b pawns and the opposite coloured bishops.

What's our best move now?

I currently have a slight preference for 29...Qh6 but other defensive queen moves might have things to be said for them.

This is were I'm at, just stick it into a viewer.

[Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "?"]
[Black "?"]
[Result "*"]

1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. b6 Qxb6 6. Nc3 g6 7. Nf3 Bg7 8. e4 O-O
9. Be2 d6 10. O-O Nbd7 11. Nd2 a5 12. a4 Ba6 13. Nb5 Rfb8 14. Nc4 Qd8 15. Qc2
Ne8 16. Bd2 Bxb5 17. axb5 Nc7 18. Bxa5 Qc8 19. b6 Nb5 20. Bg4 Nd4 21. Qd3 f5 22.
exf5 Ne5 23. Nxe5 Bxe5 24. Bc3 Rxa1 25. Rxa1 gxf5 26. Bxd4 Bxd4 27. Bxf5 Qf8 28.
Bxh7+ Kh8 29. Bf5 Qf6 (29... Qg7 30. Qh3+ (30. Qa6 Bxb2 (30... c4 31. b7 Qf8 32.
Qa8) 31. Ra2 Bd4 32. b7 Qf8 33. Qa8 Rxa8 34. bxa8=Q Qxa8 35. Rxa8+ Kg7) 30...
Kg8 31. Be6+ Kf8 32. b7 Bxf2+ (32... Qg6 33. g3) (32... Qf6 33. Qf3 Rxb7 34.
Ra8+ Kg7 35. Rg8+ Kh7 36. Qh5+ Qh6 37. Qf7+) 33. Kxf2 Qxb2+ 34. Kg3 Qxa1 35.
Qh6+ Ke8 36. Qg6+ Kd8 37. Qg8+ Kc7 38. Qc8+) (29... Qh6 30. Qa6 c4 (30... Qd2
31. Qa7 Qxf2+ 32. Kh1 c4 (32... Rxb6 33. Qxb6 c4 34. Qd8+ Kg7 35. Qxe7+ Kh6 36.
Qh7+ Kg5 37. Qg6+ Kf4 38. g3+ Ke3 39. Qe6+ (39. Qg5+ Ke2 40. Bg4+ Kd3 41. Bf5+
Ke2 42. Qg4+ Qf3+ 43. Qxf3+ Kxf3 44. Rb1) 39... Kd2) 33. Qxe7) 31. b7 Qf8 32.
Qa8 Bxb2 33. Ra2 Qxf5 34. Qxb8+ Kg7 35. Rxb2) (29... Qf7) (29... Rxb6 30. Qh3+
Kg7 31. Qh7+ Kf6 32. Qg6+ Ke5 33. Re1+ Kxd5 34. Qe6+ Kc6 35. Qd7+) (29... Rb7
30. Qh3+ Kg7 31. Qg4+ Kf6 32. Qg6+ Ke5 33. Re1+ Kxd5 34. Qe6+ (34. Be4+ Kc4 35.
Qe6+ Kb5 36. Qb3+ Ka6 37. Ra1#)) (29... Kg7 30. Qg3+ Kf6 (30... Kh8 31. Qh4+ Kg8
32. Qg5+ Bg7 (32... Qg7 33. Qxg7+ Kxg7 34. Ra6 c4 35. Ra4 Rxb6 36. Rxc4 Bxb2)
33. Be6+ Kh8 34. Qh5+ Bh6 35. Ra6 Qf4 36. g3 Qc1+ 37. Kg2 Kh7 38. Bf5+ Kg8 39.
Be6+ Kh7 40. Qf7+ Bg7 41. Qxe7) 31. Qg6+ Ke5 32. Re1+ Be3 33. Rxe3+ Kd4 34. Qg4+
Kxd5 35. Qe4#) 30. Qh3+ Kg8 31. Qh7+ Kf8 32. b7 *

Do you have a preferred 29th move for us as a result of all that analysis, WMH?

[QUOTE=Brian-E;412268]Do you have a preferred 29th move for us as a result of all that analysis, WMH?[/QUOTE]

Not at the moment, I haven't gone thru it in any great detail.

[QUOTE=WMHalsdorf;412296]Not at the moment, I haven't gone thru it in any great detail.[/QUOTE]
Okay, but the sooner you post an opinion, the better, because we need time to discuss it.

48 hours to the deadline now, so it's pretty much "speak now or forever hold your peace" time. At least, it is if we want any hope of a discussion.

What are your preferred moves, team-mates?

My preferred choice is 29...Qh6. But I also think both 29...Qg7 and 29...Qf6 are acceptable choices.

29...Qh6 offers the best chance for a draw if white make's a mistake.

[QUOTE=WMHalsdorf;412453]29...Qh6 offers the best chance for a draw if white make's a mistake.[/QUOTE]
You and I agree.

[QUOTE=WMHalsdorf;412453]29...Qh6 offers the best chance for a draw if white make's a mistake.[/QUOTE]

[QUOTE=Brian-E;412473]You and I agree.[/QUOTE]

But will they make a mistake? I rate their play this game as high, no clear errors.
Even so, I do not prefer Qf6 or Qg7 over Qh6, but we're in trouble anyway.