Gameknot analysis version is available here: game

Now White could have played 5.Qb3, attacking the Knight on d5 and the pawn at g7. The Knight being pinned by White's fianchetto bishop, means it may not move; not may White play ...e6, for reasons that will become apparent when a very similar situation crops up a few moves hence. Black's only reasonable response appears to be ...c6. The line would go: 5.Qb3 c6 6.Qxb7 Nb6 7.Bxc6 Nxc6 8.Qxc6ch Bd7 9.Qe4 Rc8 10.Nc3.

Rather a knight trade.

Understandable: this move seems to defend both threats. But it brings to life a threat that remained dormant until with this move Black cut the communication between his g4-Bishop and the d7-square.

But can't you take on g7 here?

Indeed White could have. 9...Bc5 is a mistake that augments White's big edge into a winning advantage: 10.Qxg7 Rf8 11.d3 Nb4 12.Rb1.

If I wereblack in a game like this I would not have played a move like 17...a6. He's a piece behind with exactly squat to show for it. This calls for drastic measures: 17...g5. Let White conquer the Q-side: if Black can build up something on the K-side before White notices anything amiss... who knows?

As pieces disappear, Black's counter-attacking options diminish.

Keep your rook on, Black!

There's too many pawns for Black to hope to steer for a drawn Q vs Q+B end game.

That Black could succeed in bringing 'Old Matey' to the White's King's Keep would require a huge degree of carelessness by White. However, note that All White's pawns are on dark squares, and his bishop favours the light. A very good 'good' bishop. Black's pawns do restrict that bishop's mobility somewhat, but at the cost of a certain exposure to the bishop's attacks.

Black is trying very hard!

Black should still keep his Queen if he can - even at the cost of a pawn. Passive defence won't cut it; with the queens off he has no chance. Indicated then is 33...Qb8. Suppose White carried out Jo's plan? Then comes 34.Qc6 Qxb2 35.Qxa6 (say, with the idea 35...Qxa2?? 36.Be8ch etc) 35...Qb1ch 36.Kg2 Qe4ch (probably best not to go into ...h3ch adventures) 37.Kf1 Qd3ch 38.Ke1 Qc3ch 39.Kd1 Qd3ch 40.Kc1 Qxa3ch 41.Kb1 Qd3ch 42.Ka2 Qd2ch and it does not look as though the White King can escape the attentions of the Lady in Black. What Black is looking for are those kinds of opportunities for a telling counter-attack.