1.
e4
e5
2.
Nf3
Nc6
3.
Bb5
a6
4.
Ba4
Nf6
5.
O-O
Be7
6.
Re1
b5
7.
Bb3
d6
8.
c3
O-O
9.
h3
Nb8
10.
d4
Nbd7
11.
Nh4
g6
12.
Bh6
Re8
13.
f4
c5
14.
Nf3
c4
15.
Bc2
Bb7
16.
Nbd2
Bf8
17.
Bxf8
1/2-1/2
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Event
Site
Amsterdam
Date
1969.??.??
Round
15
White
Black
Result
1/2-1/2
Score
[Event "IBM"] [Site "Amsterdam"] [Date "1969.??.??"] [Round "15"] [White "Byrne, Robert Eugene"] [Black "Portisch, Lajos"] [Result "1/2-1/2"] 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Nb8 10. d4 Nbd7 11. Nh4 g6 12. Bh6 Re8 13. f4 c5 14. Nf3 c4 15. Bc2 Bb7 16. Nbd2 Bf8 17. Bxf8 1/2-1/2