Originally posted by WanderingKing
Is it OK if I ask for a game analysis here? I was playing black in this game today and I'm not sure where I went wrong. I think I was quite OK about the 20th move. Am I right?
[pgn][Result "1-0"] 1. Nf3 d5 2. g3 c5 3. Bg2 Nc6 4. O-O Nf6 5. d3 e5 6. Bg5 d4 7. Bxf6 Qxf6 8. Nbd2 Be7 9. Ne4 Qh6 10. c3 Bh3 11. Qb3 Rb8 12. cxd4 cxd4 13. Rac1 O-O 14. Nc5 B ...[text shortened]... 6 37. a5 Rc7 38. Qe2 Qa3 39. Qg4+ Kh8 40. Rf1 bxa5 41. f6 Rg8 42. Ra8 Rcc8 43. Rxc8 1-0[/pgn]
I think of this as more of a King's Indian Attack more than a Reti, but it's really probably a Modern in reverse, so it's all in the family!
White's 6. Bg5 is somewhat inferior. The main move is 6. Nbd2, but white can also play Nc3, Na3, or even e4, as a queen trade is better for white than black with a hole on d5 if black were to play 6. ... dxe4 7. dxe4 Qxd1.
That said, 6. ... d4 is a positional mistake, creating weakening control over e4 and c4, and helping the g2 bishop.
At the risk of being simplistic, side-by-side pawns are strongest when they stay that way, unless there is a compelling reason to advance one. After that, I think white had the usual small nagging edge until the pawn disappears, after which things became more defined.
Black should have also castled earlier, as at move 12 white could have played 12. Bxh3 Qxh3 13. Qxf7+, with a following knight fork on g5 (the second knight sticks) and a pretty good white advantage.
The "Bxh3 Qxh3 followed by a knight on g5" is a theme of the KIA, and the g4/g5 squares are hot squares in general in KIA/KID structures, so you always have to look for tactics whenever either side has a knight in range-sort of a mental "red flag".
All that aside, this was a good and fun game to play through, with both side taking shots until one of them stuck!