1.
Nf3
Nf6
2.
g3
g6
3.
Bg2
Bg7
4.
O-O
O-O
5.
d3
c5
6.
e4
Nc6
7.
Nbd2
d5
8.
Re1
b6
9.
c3
dxe4
10.
dxe4
Ng4
11.
Bf1
Nge5
12.
Qc2
Bb7
13.
Nxe5
Nxe5
14.
f4
Nd7
15.
Bg2
Qc7
16.
Nf1
Rad8
17.
Be3
c4
18.
Rad1
Nc5
19.
Bxc5
Qxc5+
20.
Qf2
Qxf2+
21.
Kxf2
e5
22.
Ne3
b5
23.
f5
Rfe8
24.
h4
Bf6
25.
Ke2
Be7
26.
Rf1
Kg7
27.
Rxd8
Rxd8
28.
Nd5
Bxd5
29.
exd5
Rb8
30.
Be4
Rb6
31.
Kd2
a5
32.
b3
a4
33.
bxc4
bxc4
34.
Rb1
Rxb1
35.
Bxb1
h5
36.
fxg6
fxg6
37.
Bc2
a3
38.
Ke2
Kf6
39.
Kf3
Bd6
40.
Ke4
Bc7
41.
Bd1
Ba5
1/2-1/2
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Event
Site
Leiden
Date
1970.04.??
Round
1
White
Black
Donner, Jan Hein
Result
1/2-1/2
Score
[Event "Leiden"] [Site "Leiden"] [Date "1970.04.??"] [Round "1"] [White "Botvinnik, Mikhail"] [Black "Donner, Jan Hein"] [Result "1/2-1/2"] 1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. O-O O-O 5. d3 c5 6. e4 Nc6 7. Nbd2 d5 8. Re1 b6 9. c3 dxe4 10. dxe4 Ng4 11. Bf1 Nge5 12. Qc2 Bb7 13. Nxe5 Nxe5 14. f4 Nd7 15. Bg2 Qc7 16. Nf1 Rad8 17. Be3 c4 18. Rad1 Nc5 19. Bxc5 Qxc5+ 20. Qf2 Qxf2+ 21. Kxf2 e5 22. Ne3 b5 23. f5 Rfe8 24. h4 Bf6 25. Ke2 Be7 26. Rf1 Kg7 27. Rxd8 Rxd8 28. Nd5 Bxd5 29. exd5 Rb8 30. Be4 Rb6 31. Kd2 a5 32. b3 a4 33. bxc4 bxc4 34. Rb1 Rxb1 35. Bxb1 h5 36. fxg6 fxg6 37. Bc2 a3 38. Ke2 Kf6 39. Kf3 Bd6 40. Ke4 Bc7 41. Bd1 Ba5 1/2-1/2