1.
c4
e5
2.
Nc3
Nf6
3.
g3
c6
4.
Nf3
e4
5.
Nd4
d5
6.
cxd5
Qb6
7.
Nb3
cxd5
8.
Bg2
Bf5
9.
d3
exd3
10.
O-O
Nc6
11.
Bg5
O-O-O
12.
exd3
Be6
13.
Rc1
Kb8
14.
d4
Be7
15.
Na4
Qc7
16.
Nbc5
h6
17.
Be3
Rc8
18.
Bf4
Bd6
19.
Qb3
1-0
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Event
Site
Amsterdam
Date
1970.07.21
Round
7
White
Black
Jongsma, Alexander
Result
1-0
[Event "IBM"] [Site "Amsterdam"] [Date "1970.07.21"] [Round "7"] [White "Polugaevsky, Lev"] [Black "Jongsma, Alexander"] [Result "1-0"] 1. c4 e5 2. Nc3 Nf6 3. g3 c6 4. Nf3 e4 5. Nd4 d5 6. cxd5 Qb6 7. Nb3 cxd5 8. Bg2 Bf5 9. d3 exd3 10. O-O Nc6 11. Bg5 O-O-O 12. exd3 Be6 13. Rc1 Kb8 14. d4 Be7 15. Na4 Qc7 16. Nbc5 h6 17. Be3 Rc8 18. Bf4 Bd6 19. Qb3 1-0