1.
c4
g6
2.
g3
Bg7
3.
Bg2
Nf6
4.
Nc3
O-O
5.
Nf3
Nc6
6.
O-O
a6
7.
d3
Rb8
8.
e4
d6
9.
h3
Bd7
10.
a4
a5
11.
d4
e5
12.
Be3
exd4
13.
Nxd4
Re8
14.
Ndb5
Qc8
15.
Kh2
Re5
16.
Na7
Nxa7
17.
Bxa7
Ra8
18.
Bd4
Rh5
1/2-1/2
Opening Explorer
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Event
Site
San Francisco
Date
1991.??.??
Round
4
White
Grefe, John Alan
Black
Rogers, Ian
Result
1/2-1/2
WhiteElo
2385
BlackElo
2545
Score
[Event "San Francisco"] [Site "San Francisco"] [Date "1991.??.??"] [Round "4"] [White "Grefe, John Alan"] [Black "Rogers, Ian"] [Result "1/2-1/2"] [WhiteElo "2385"] [BlackElo "2545"] 1. c4 g6 2. g3 Bg7 3. Bg2 Nf6 4. Nc3 O-O 5. Nf3 Nc6 6. O-O a6 7. d3 Rb8 8. e4 d6 9. h3 Bd7 10. a4 a5 11. d4 e5 12. Be3 exd4 13. Nxd4 Re8 14. Ndb5 Qc8 15. Kh2 Re5 16. Na7 Nxa7 17. Bxa7 Ra8 18. Bd4 Rh5 1/2-1/2