One problem I find when looking through master games is not understanding some of the moves - as in this example:

1.e5...c5
2.Nf3...d6
3.d4...cxd4
4.Nxd4...Nf6
5.Nc3...a6
6.Be2...e5
7.Nb3...Be7
8.0-0...0-0
9.Kh1...b5
10.Nd5!...Nxd5
11.Qxd5...Ra7
12.Be3...Be6

Can anyone explain the reason behind whites move: 9.Kh1

The game is the first game shown in the introduction to: "Pawn Structure Chess" by Andrew Soltis and is the game Kuzmin-Groszpeter, Kusadasi 1990

The complete game is here: http://www.chessgames.com/perl/chessgame?gid=1274497

I would guess for a later f4... could be a waiting move to see what variation black has planned. I see some moves in master games that dont make sense until later. How does the game proceed?

Yes I see..so this was to prepare for the later f4...which was played on move 15 and in the book is shown 15.f4!
Full game below:
[White "Gennadi Kuzmin"]
[Black "Attila Groszpeter"]
[Result "1-0"]
[ECO "B92"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nb3 Be7 8. O-O
O-O 9. Kh1 b5 10. Nd5 Nxd5 11. Qxd5 Ra7 12. Be3 Be6 13. Qd1 Rd7 14. a4 b4 15.
f4 Qc7 16. f5 Bc4 17. Bxc4 Qxc4 18. f6 Bxf6 19. Rxf6 gxf6 20. Qg4+ Kh8 21. Qh4
Qe6 22. Nd4 Qe7 23. Nf5 Qe6 24. Rf1 d5 25. Ng7 Qe7 26. Bc5 Qxc5 27. Nh5 1-0

Originally posted by Mahout
One problem I find when looking through master games is not understanding some of the moves - as in this example:

1.e5...c5
2.Nf3...d6
3.d4...cxd4
4.Nxd4...Nf6
5.Nc3...a6
6.Be2...e5
7.Nb3...Be7
8.0-0...0-0
9.Kh1...b5
10.Nd5!...Nxd5
11.Qxd5...Ra7
12.Be3...Be6

Can anyone explain the reason behind whites move: 9.Kh1

The game is the first game ...[text shortened]... sadasi 1990

The complete game is here: http://www.chessgames.com/perl/chessgame?gid=1274497

Originally posted by Mahout
One problem I find when looking through master games is not understanding some of the moves - as in this example:

1.e5...c5
2.Nf3...d6
3.d4...cxd4
4.Nxd4...Nf6
5.Nc3...a6
6.Be2...e5
7.Nb3...Be7
8.0-0...0-0
9.Kh1...b5
10.Nd5!...Nxd5
11.Qxd5...Ra7
12.Be3...Be6

Can anyone explain the reason behind whites move: 9.Kh1

The game is the first game ...[text shortened]... sadasi 1990

The complete game is here: http://www.chessgames.com/perl/chessgame?gid=1274497

If you want to know the ideas behind an opening look at a dedicated book on that subject not a "clip" from the internet. That 1. e5 should be 1. e4

If you are interested in having a look at other master games explained:

http://www.redhotpawn.com/board/showthread.php?threadid=51995&page=14

http://www.redhotpawn.com/board/showthread.php?threadid=56236&page=17

http://www.redhotpawn.com/board/showthread.php?threadid=36828

RK

I think it is interesting to follow the game of the day at chessgames.com... Alot of good ideas from the posters.