1.
c4
c5
2.
Nc3
Nc6
3.
g3
g6
4.
Bg2
Bg7
5.
d3
e6
6.
e4
Nge7
7.
Nge2
d6
8.
O-O
Rb8
9.
Be3
Nd4
10.
Qd2
Nec6
11.
Bh6
O-O
12.
Bxg7
Kxg7
13.
f4
f5
14.
Rae1
a6
15.
b3
Bd7
16.
Rf2
b5
17.
h3
b4
18.
Nd1
h5
19.
Ne3
Rh8
20.
Nc2
h4
21.
Ncxd4
Nxd4
22.
Nxd4
cxd4
23.
Rf3
hxg3
24.
Rxg3
Kf7
25.
Kh2
Qf6
26.
e5
dxe5
27.
Rxe5
Qd8
28.
Qf2
Bc8
29.
Bh1
Rh6
30.
Rc5
Bb7
31.
Bxb7
Rxb7
32.
Qe2
Qd6
33.
Qf3
Rc7
34.
Re5
Kf6
35.
Qa8
Rch7
36.
c5
Qe7
37.
Qb8
a5
38.
Qb6
g5
39.
fxg5+
Kxe5
40.
gxh6
Rxh6
41.
Qxa5
Kf6
42.
Qxb4
f4
43.
Qxd4+
e5
44.
Qf2
Ke6
45.
Rg4
Qh7
46.
Qf3
Qf5
47.
Qc6+
Kf7
48.
Qxh6
Qxd3
49.
Rg7+
1-0
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Event
Site
Las Vegas
Date
1975.03.05
Round
5
White
Watson, John L
Black
Prochaska Kolbas, Peter
Result
1-0
Score
[Event "Las Vegas National op"] [Site "Las Vegas"] [Date "1975.03.05"] [Round "5"] [White "Watson, John L"] [Black "Prochaska Kolbas, Peter"] [Result "1-0"] 1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 e6 6. e4 Nge7 7. Nge2 d6 8. O-O Rb8 9. Be3 Nd4 10. Qd2 Nec6 11. Bh6 O-O 12. Bxg7 Kxg7 13. f4 f5 14. Rae1 a6 15. b3 Bd7 16. Rf2 b5 17. h3 b4 18. Nd1 h5 19. Ne3 Rh8 20. Nc2 h4 21. Ncxd4 Nxd4 22. Nxd4 cxd4 23. Rf3 hxg3 24. Rxg3 Kf7 25. Kh2 Qf6 26. e5 dxe5 27. Rxe5 Qd8 28. Qf2 Bc8 29. Bh1 Rh6 30. Rc5 Bb7 31. Bxb7 Rxb7 32. Qe2 Qd6 33. Qf3 Rc7 34. Re5 Kf6 35. Qa8 Rch7 36. c5 Qe7 37. Qb8 a5 38. Qb6 g5 39. fxg5+ Kxe5 40. gxh6 Rxh6 41. Qxa5 Kf6 42. Qxb4 f4 43. Qxd4+ e5 44. Qf2 Ke6 45. Rg4 Qh7 46. Qf3 Qf5 47. Qc6+ Kf7 48. Qxh6 Qxd3 49. Rg7+ 1-0