1.
e4
g6
2.
d4
Bg7
3.
c3
d6
4.
f4
Nf6
5.
Bd3
e5
6.
Nf3
exf4
7.
Bxf4
O-O
8.
O-O
c5
9.
Nbd2
cxd4
10.
cxd4
Nc6
11.
Qb3
d5
12.
e5
Ne4
13.
Nxe4
dxe4
14.
Bxe4
Nxd4
15.
Qe3
Ne6
16.
Bg3
Qb6
17.
Qxb6
axb6
18.
b4
b5
19.
Rf2
Re8
20.
Rc2
1/2-1/2
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Event
Site
San Juan
Date
1969.10.12
Round
4
White
Black
Donner, Jan Hein
Result
1/2-1/2
Score
[Event "San Juan"] [Site "San Juan"] [Date "1969.10.12"] [Round "4"] [White "Byrne, Robert Eugene"] [Black "Donner, Jan Hein"] [Result "1/2-1/2"] 1. e4 g6 2. d4 Bg7 3. c3 d6 4. f4 Nf6 5. Bd3 e5 6. Nf3 exf4 7. Bxf4 O-O 8. O-O c5 9. Nbd2 cxd4 10. cxd4 Nc6 11. Qb3 d5 12. e5 Ne4 13. Nxe4 dxe4 14. Bxe4 Nxd4 15. Qe3 Ne6 16. Bg3 Qb6 17. Qxb6 axb6 18. b4 b5 19. Rf2 Re8 20. Rc2 1/2-1/2