complicated position from my game

here's a position from a finished game of mine in another site. I went on to lose the game. it's calm-looking right?

White to move, try to see if Nxd5 works. I did play it in the game. I will post the solution lines later.

Originally posted by diskamyl
[fen]r2q1rk1/1b2bppp/ppn5/2ppP3/6n1/1PNP1NP1/PB3PBP/R2Q1RK1 w - - 0 13[/fen]

here's a position from a finished game of mine in another site. I went on to lose the game. it's calm-looking right?

[b]White to move, try to see if Nxd5 works. I did play it in the game. I will post the solution lines later.[/b]

1.Nxd5 Qxd5 2.Nd4 [hoping for 2...Qd7 3.Nxc6 etc. overloading the bQ] 2...Qxg2+! 3.Kxg2 Nxd4+ is scary for White. His King is under serious fire, and Black already has 3 pieces for the Queen.

4.f3?? Ne3+ picks up the Queen.
4.Kh3 Bf3 is really annoying. White has to watch the threat ...Ne6-g5.
4.Kg1 Nf3+ 5.Kh1 [forced, since 5.Kg2?? Ng5+! is game] and further analysis is hardly needed. Black's active minor pieces are obviously superior to the Queen. Black can either simply win some material with 5...Ngxh2, or look around for an even better move.

If White cannot do better than 2.Nd4, then 1.Nxd5 must be a mistake.

Originally posted by SwissGambit
1.Nxd5 Qxd5 2.Nd4 [hoping for 2...Qd7 3.Nxc6 etc. overloading the bQ] 2...Qxg2+! 3.Kxg2 Nxd4+ is scary for White. His King is under serious fire, and Black already has 3 pieces for the Queen.

4.f3?? Ne3+ picks up the Queen.
4.Kh3 Bf3 is really annoying. White has to watch the threat ...Ne6-g5.
4.Kg1 Nf3+ 5.Kh1 [forced, since 5.Kg2?? Ng5+! is game] a or an even better move.

If White cannot do better than 2.Nd4, then 1.Nxd5 must be a mistake.

wow. that analysis is perfectly accurate, after 4Kg1, ...Bf3 is still even better though (there's no way to move the queen due to 5...Ne2+).

I didn't even consider such queen move during the game, and my false combination worked well and gained me a pawn. then I lost the pawn with a wrong rook move (21...Rad8 would save it instead of the f rook) and eventually the game due to bad endgame play.

1. c4 c5 2. g3 Nc6 3. Bg2 Nf6 4. Nc3 e6 5. Nf3 a6 6. O-O Be7 7. e4 b6 8. d3 Bb7
9. b3 O-O 10. Bb2 d5 11. e5 Ng4 12. cxd5 exd5 13. Nxd5 Qxd5 14. Nd4 Qd7 15.
Nxc6 Bxc6 16. Bxc6 Qxc6 17. Qxg4 Qe6 18. Qxe6 fxe6 19. d4 Rad8 20. Rfd1 Rd5 21.
Ba3 Rfd8 22. Rac1 Rxd4 23. Rxd4 Rxd4 24. Rc2 g5 25. Bc1 b5 26. Be3 Rd5 27. f4
g4 28. Rd2 Kf7 29. Rxd5 exd5 30. f5 d4 31. Bf2 Bd8 32. b4 d3 33. Be3 c4 34. Kf2
a5 35. a3 axb4 36. axb4 c3 37. Ke1 Be7 38. Bc5 c2 39. Kd2 Bg5+ 0-1

Originally posted by diskamyl
wow. that analysis is perfectly accurate, after 4Kg1, ...Bf3 is still even better though (there's no way to move the queen due to 5...Ne2+).

Yes, 4.Kg1 Bf3! is game. Good spot.

Combinations like ...Qxg2+ show the importance of watching out for forcing moves, even if they look absurd at first.