Annotated chess game

Black doesn't have to move the knight to protect it. ...h5 protects it

This move is a blunder because the white bishop can go to c6 and (after the black queen moves) take the black rook

jkarp, you forgot what I told you yesterday! Doubled pawns towards the centre is good. Double pawns away from the centre is not good!

Taking the Queen is suicide by black. White simply captures the Rook with the Queen on h3 and mate is one move away. There is no long run if black takes the newly-promoted Queen. It's mate in two!

There is an immediate mate threat. If black hadn't played this, white simply plays Queen takes Rook and after Black plays King takes Queen, white plays Queen to c8 check. Black can only stop mate by retreating his dark-squared bishop to the back rank, but after white plays Queen takes Bishop, the game is over. Black played this move to prevent that.

It's rare to have three queens but I think one of the best chess players in the world - Alexander Alekhine - played a game in Hastings in 1922 where he queened two pawns. It's worth playing out if you get a chance - beautiful game. Just Google Alekhine Hastings 1922 Dutch Defense and it should come up. It's a famous game

I love advancing pawns as much as you, but better, I think, was 30) QxR+ After black plays 30)...KxQ, which is forced, you play 31) Qxh7 and black can't stop mate. If Black tries 31) ...Bf6 (to stop mate by the white queen on h8), he is just delaying the inevitable. You could play 32) Bxd6 check and black runs out of options.