[Event "Match om het wereldkampioenschap"]
[Site "Dordrecht NLD"]
[Date "1983.10.21"]
[Round "1"]
[White "Van der Wal, Jannes"]
[Black "Wiersma, Harm"]
[Result "1/2-1/2"]

1. 32-28 20-25 2. 37-32 15-20 3. 41-37 10-15 4. 46-41 5-10 5. 34-30 25x34 6.
39x30 20-25 7. 44-39 25x34 8. 40x29 18-23 9. 29x18 12x23 10. 35-30 7-12 11.
30-25 15-20 12. 31-27 17-21 13. 36-31 21-26 14. 41-36 12-18 15. 39-34 20-24
16. 49-44 1-7 17. 27-22 18x27 18. 31x22 24-29 19. 33x24 19x39 20. 44x33 14-19
21. 45-40 7-12 22. 50-45 2-7 23. 33-29 23x34 24. 40x29 12-18 25. 37-31 18x27
26. 31x22 7-12 27. 29-23 10-14 28. 43-39 11-17 29. 22x11 6x17 30. 42-37 17-22
31. 28x17 19x28 32. 32x23 12x21 33. 45-40 8-12 34. 40-34 12-17 35. 47-42 17-22
36. 37-31 26x37 37. 42x31 13-19 38. 23-18 22x13 39. 31-26 21-27 40. 26-21
19-23 41. 21x32 13-19 42. 34-30 14-20 43. 25x14 9x20 44. 30-25 20-24 45. 48-43
23-29 46. 39-33 29-34 47. 43-39 34x43 48. 38x49 19-23 49. 36-31 3-8 50. 31-27
23-29 1/2-1/2


[Event "Match om het wereldkampioenschap"]
[Site "Dordrecht NLD"]
[Date "1983.10.22"]
[Round "2"]
[White "Wiersma, Harm"]
[Black "Van der Wal, Jannes"]
[Result "1/2-1/2"]

1. 32-28 17-22 2. 28x17 11x22 3. 37-32 19-23 4. 41-37 14-19 5. 46-41 10-14 6.
34-29 23x34 7. 40x29 6-11 8. 45-40 5-10 9. 39-34 12-17 10. 43-39 8-12 11.
32-28 16-21 12. 31-26 21-27 13. 37-32 18-23 14. 29x18 12x23 15. 32x12 23x43
16. 49x38 7x18 17. 34-30 20-25 18. 42-37 25x32 19. 37x6 19-23 20. 41-37 3-8
21. 37-32 8-12 22. 32-27 12-17 23. 47-42 15-20 24. 42-38 20-24 25. 40-34 14-19
26. 34-30 2-7 27. 44-40 23-29 28. 50-45 10-14 29. 40-34 29x40 30. 45x34 18-23
31. 48-42 4-10 32. 33-29 24x33 33. 38x18 13x31 34. 36x27 10-15 35. 30-25 9-13
36. 42-38 19-23 37. 38-33 13-18 38. 33-29 14-19 39. 27-21 17-22 40. 21-17
22x11 41. 6x17 7-11 42. 17x6 23-28 43. 34-30 19-23 44. 29-24 18-22 45. 25-20
23-29 46. 24x33 15x24 47. 30x19 28x39 48. 19-14 39-44 49. 14-10 44-50 50. 10-4
1-7 1/2-1/2


[Event "Match om het wereldkampioenschap"]
[Site "Dordrecht NLD"]
[Date "1983.10.23"]
[Round "3"]
[White "Van der Wal, Jannes"]
[Black "Wiersma, Harm"]
[Result "1/2-1/2"]

1. 32-28 19-23 2. 28x19 14x23 3. 33-28 23x32 4. 37x28 10-14 5. 39-33 5-10 6.
44-39 16-21 7. 50-44 11-16 8. 38-32 6-11 9. 43-38 18-23 10. 28x19 14x23 11.
49-43 10-14 12. 42-37 14-19 13. 47-42 13-18 14. 32-28 23x32 15. 37x28 18-23
16. 42-37 23x32 17. 37x28 19-24 18. 34-30 9-13 19. 30x19 13x24 20. 40-34 8-13
21. 34-30 2-8 22. 30x19 13x24 23. 45-40 4-9 24. 40-34 9-13 25. 44-40 12-18 26.
34-30 7-12 27. 30x19 13x24 28. 40-34 3-9 29. 34-30 9-13 30. 30x19 13x24 31.
39-34 24-29 32. 34x23 18x29 33. 33x24 20x29 34. 43-39 8-13 35. 41-37 21-26 36.
31-27 17-21 37. 37-32 11-17 38. 48-42 13-19 39. 42-37 12-18 40. 28-23 19x28
41. 32x34 21x43 42. 39x48 18-23 43. 37-32 16-21 44. 35-30 17-22 45. 30-24 1-7
46. 46-41 22-28 47. 41-37 21-27 48. 32x21 26x17 49. 48-42 28-33 50. 36-31
17-22 51. 42-38 33x42 52. 37x48 1/2-1/2


[Event "Match om het wereldkampioenschap"]
[Site "Bunnik NLD"]
[Date "1983.10.26"]
[Round "4"]
[White "Wiersma, Harm"]
[Black "Van der Wal, Jannes"]
[Result "1/2-1/2"]

1. 33-29 18-22 2. 31-26 13-18 3. 39-33 22-27 4. 32x21 16x27 5. 44-39 19-23 6.
37-31 17-22 7. 50-44 9-13 8. 35-30 20-25 9. 40-35 14-19 10. 30-24 19x30 11.
35x24 10-14 12. 24-20 15x24 13. 29x9 3x14 14. 41-37 5-10 15. 46-41 14-19 16.
33-28 23x32 17. 37x17 12x21 18. 26x17 11x22 19. 41-37 6-11 20. 37-32 11-16 21.
32x21 16x27 22. 42-37 7-11 23. 37-32 11-16 24. 32x21 16x27 25. 48-42 2-7 26.
42-37 7-11 27. 47-41 1-6 28. 37-32 11-16 29. 32x21 16x27 30. 41-37 6-11 31.
37-32 11-16 32. 32x21 16x27 33. 38-32 1/2-1/2


[Event "Match om het wereldkampioenschap"]
[Site "Bunnik NLD"]
[Date "1983.10.27"]
[Round "5"]
[White "Van der Wal, Jannes"]
[Black "Wiersma, Harm"]
[Result "1/2-1/2"]

1. 32-28 16-21 2. 31-26 11-16 3. 37-32 18-22 4. 41-37 7-11 5. 34-29 1-7 6.
46-41 20-25 7. 29-23 21-27 8. 32x21 16x27 9. 35-30 25x34 10. 39x30 11-16 11.
44-39 7-11 12. 30-24 19x30 13. 36-31 27x36 14. 23-19 14x32 15. 38x7 8-12 16.
7x18 13x22 17. 40-35 10-14 18. 35x24 22-28 19. 33x22 17x28 20. 42-38 16-21 21.
26x17 11x22 22. 45-40 9-13 23. 40-34 6-11 24. 34-29 3-8 25. 50-44 11-17 26.
38-33 5-10 27. 44-40 17-21 28. 40-34 14-20 29. 43-38 21-27 30. 48-43 10-14 31.
24-19 13x24 32. 38-32 27x38 33. 43x23 8-12 34. 49-44 12-17 35. 44-40 4-9 36.
40-35 22-28 37. 33x11 24x44 38. 11-6 44-50 39. 6-1 9-13 40. 1-6 13-19 41.
47-42 36x38 42. 34-30 19x28 43. 6x42 1/2-1/2


[Event "Match om het wereldkampioenschap"]
[Site "Bunnik NLD"]
[Date "1983.10.28"]
[Round "6"]
[White "Wiersma, Harm"]
[Black "Van der Wal, Jannes"]
[Result "1/2-1/2"]

1. 32-28 17-22 2. 28x17 11x22 3. 37-32 19-23 4. 41-37 14-19 5. 46-41 10-14 6.
35-30 20-25 7. 30-24 19x30 8. 33-28 22x33 9. 39x10 30x39 10. 44x33 5x14 11.
32-28 13-19 12. 37-32 8-13 13. 41-37 2-8 14. 50-44 4-10 15. 44-39 6-11 16.
32-27 19-23 17. 28x19 14x23 18. 37-32 11-17 19. 49-44 9-14 20. 39-34 7-11 21.
42-37 17-22 22. 47-42 11-17 23. 43-39 3-9 24. 48-43 1-7 25. 34-30 25x34 26.
39x30 15-20 27. 30-25 20-24 28. 33-29 24x33 29. 38x29 23x34 30. 40x29 14-19
31. 43-38 10-15 32. 44-40 17-21 33. 31-26 22x31 34. 26x17 12x21 35. 37x17
1/2-1/2


[Event "Match om het wereldkampioenschap"]
[Site "Bunnik NLD"]
[Date "1983.10.29"]
[Round "7"]
[White "Van der Wal, Jannes"]
[Black "Wiersma, Harm"]
[Result "1/2-1/2"]

1. 32-28 17-22 2. 28x17 12x21 3. 33-28 7-12 4. 39-33 11-17 5. 44-39 6-11 6.
50-44 1-6 7. 38-32 21-26 8. 42-38 17-21 9. 34-29 20-25 10. 47-42 14-20 11.
40-34 20-24 12. 29x20 25x14 13. 44-40 14-20 14. 34-29 10-14 15. 40-34 5-10 16.
49-44 20-24 17. 29x20 15x24 18. 31-27 18-23 19. 27-22 11-17 20. 22x11 6x17 21.
44-40 12-18 22. 36-31 10-15 23. 31-27 17-22 24. 28x17 21x12 25. 34-29 23x34
26. 40x20 15x24 27. 32-28 18-23 28. 37-32 12-17 29. 27-21 16x27 30. 32x12 8x17
31. 42-37 23x32 32. 38x27 17-22 33. 27x18 13x22 34. 37-31 26x37 35. 41x32
19-23 36. 43-38 9-13 37. 48-43 13-18 38. 45-40 3-8 39. 40-34 14-19 40. 46-41
8-12 41. 41-36 12-17 42. 36-31 2-7 43. 32-28 23x32 44. 38x27 7-11 45. 43-38
11-16 46. 38-32 19-23 47. 31-26 22x31 48. 26x37 17-22 1/2-1/2


[Event "Match om het wereldkampioenschap"]
[Site "Bunnik NLD"]
[Date "1983.10.30"]
[Round "8"]
[White "Wiersma, Harm"]
[Black "Van der Wal, Jannes"]
[Result "1/2-1/2"]

1. 34-30 19-23 2. 30-25 14-19 3. 25x14 9x20 4. 35-30 20-25 5. 31-27 25x34 6.
39x30 10-14 7. 44-39 15-20 8. 30-25 5-10 9. 37-31 10-15 10. 50-44 17-21 11.
31-26 4-9 12. 26x17 11x31 13. 36x27 6-11 14. 41-36 11-17 15. 46-41 7-11 16.
41-37 1-6 17. 37-31 20-24 18. 42-37 14-20 19. 25x14 9x20 20. 47-42 3-9 21.
31-26 17-21 22. 26x17 11x31 23. 37x26 6-11 24. 32-27 11-17 25. 38-32 24-29 26.
33x24 19x30 27. 42-37 30-35 28. 37-31 2-7 29. 43-38 17-21 30. 26x17 12x21 31.
31-26 7-12 32. 26x17 12x21 33. 40-34 8-12 34. 39-33 23-29 35. 33x24 20x40 36.
45x34 15-20 37. 49-43 20-24 38. 38-33 9-14 39. 43-39 13-19 40. 34-30 18-23 41.
27-22 12-17 42. 22x11 16x7 43. 36-31 21-26 44. 31-27 23-29 45. 32-28 29x38 46.
28-23 19x28 47. 30x10 38-43 48. 10-5 43x34 49. 5x32 34-39 50. 44x33 35-40 51.
33-29 40-44 52. 29-23 7-12 53. 23-19 44-50 54. 19-14 1/2-1/2


[Event "Match om het wereldkampioenschap"]
[Site "Deventer NLD"]
[Date "1983.11.02"]
[Round "9"]
[White "Van der Wal, Jannes"]
[Black "Wiersma, Harm"]
[Result "1/2-1/2"]

1. 32-28 19-23 2. 28x19 14x23 3. 33-28 23x32 4. 37x28 10-14 5. 39-33 5-10 6.
44-39 16-21 7. 50-44 11-16 8. 38-32 6-11 9. 43-38 18-23 10. 28x19 14x23 11.
49-43 10-14 12. 42-37 14-19 13. 47-42 12-18 14. 33-29 7-12 15. 29-24 20x29 16.
32-28 23x32 17. 34x14 9x20 18. 37x28 4-9 19. 41-37 21-26 20. 37-32 26x37 21.
42x31 17-21 22. 46-41 13-19 23. 39-33 21-26 24. 41-37 8-13 25. 43-39 2-8 26.
40-34 19-24 27. 44-40 11-17 28. 31-27 17-22 29. 28x17 12x21 30. 48-43 18-23
31. 33-28 13-19 32. 38-33 8-13 33. 34-29 23x34 34. 40x29 20-25 35. 29x20 15x24
36. 45-40 13-18 37. 40-34 9-13 38. 34-30 25x34 39. 39x30 18-23 40. 37-31 26x37
41. 32x41 23x32 42. 27x38 1/2-1/2


[Event "Match om het wereldkampioenschap"]
[Site "Deventer NLD"]
[Date "1983.11.03"]
[Round "10"]
[White "Wiersma, Harm"]
[Black "Van der Wal, Jannes"]
[Result "1/2-1/2"]

1. 33-28 19-23 2. 28x19 14x23 3. 39-33 10-14 4. 44-39 5-10 5. 50-44 14-19 6.
35-30 20-25 7. 40-35 15-20 8. 44-40 9-14 9. 33-29 10-15 10. 38-33 3-9 11.
42-38 4-10 12. 47-42 17-21 13. 31-26 21-27 14. 32x21 16x27 15. 37-31 12-17 16.
31x22 17x28 17. 33x22 18x27 18. 29x18 13x22 19. 41-37 9-13 20. 38-33 7-12 21.
42-38 1-7 22. 46-41 13-18 23. 37-31 19-24 24. 30x19 14x23 25. 35-30 11-17 26.
30-24 20x29 27. 33x24 6-11 28. 40-35 8-13 29. 41-37 13-19 30. 24x13 18x9 31.
37-32 11-16 32. 32x21 16x27 33. 38-32 1/2-1/2


[Event "Match om het wereldkampioenschap"]
[Site "Deventer NLD"]
[Date "1983.11.04"]
[Round "11"]
[White "Van der Wal, Jannes"]
[Black "Wiersma, Harm"]
[Result "1/2-1/2"]

1. 32-28 18-22 2. 37-32 12-18 3. 41-37 7-12 4. 46-41 20-25 5. 31-26 1-7 6.
36-31 14-20 7. 32-27 10-14 8. 37-32 5-10 9. 41-36 19-23 10. 28x19 14x23 11.
34-30 25x34 12. 40x29 23x34 13. 39x30 20-25 14. 44-39 25x34 15. 39x30 10-14
16. 30-25 13-19 17. 33-29 19-23 18. 35-30 23x34 19. 30x39 14-19 20. 38-33 8-13
21. 50-44 16-21 22. 27x16 15-20 23. 25x23 18x27 24. 42-38 12-18 25. 45-40 3-8
26. 40-34 13-19 27. 44-40 9-14 28. 47-42 8-13 29. 38-33 27-32 30. 43-38 32x43
31. 49x38 19-23 32. 33-29 4-10 33. 29-24 10-15 34. 34-30 14-20 35. 39-33 20x29
36. 33x24 23-29 37. 24x33 22-27 38. 31x22 17x39 39. 30-25 11-17 40. 40-34
39x30 41. 25x34 7-12 42. 36-31 15-20 43. 38-33 13-19 44. 42-38 20-25 45. 33-29
17-22 46. 31-27 22x31 47. 26x37 2-7 48. 37-32 6-11 49. 38-33 11-17 50. 48-42
18-22 51. 32-28 12-18 52. 42-38 22-27 1/2-1/2


[Event "Match om het wereldkampioenschap"]
[Site "Deventer NLD"]
[Date "1983.11.05"]
[Round "12"]
[White "Wiersma, Harm"]
[Black "Van der Wal, Jannes"]
[Result "1/2-1/2"]

1. 33-29 18-22 2. 31-26 13-18 3. 36-31 19-23 4. 35-30 20-24 5. 30x28 22x24 6.
39-33 8-13 7. 32-28 14-19 8. 37-32 2-8 9. 41-37 18-23 10. 43-39 13-18 11.
46-41 9-13 12. 49-43 4-9 13. 41-36 10-14 14. 31-27 17-22 15. 28x17 11x31 16.
36x27 6-11 17. 47-41 11-17 18. 34-29 23x34 19. 40x20 15x24 20. 33-28 18-22 21.
27x18 13x33 22. 38x20 14x25 23. 45-40 12-18 24. 39-33 7-12 25. 42-38 9-13 26.
44-39 1-7 27. 40-34 17-21 28. 26x17 12x21 29. 50-44 7-12 30. 44-40 5-10 31.
40-35 3-9 32. 48-42 19-24 33. 37-31 13-19 34. 41-37 9-13 35. 34-30 25x34 36.
39x30 10-14 37. 43-39 18-23 38. 39-34 13-18 39. 31-26 14-20 40. 26x17 12x21
41. 37-31 8-12 42. 33-29 24x33 43. 38x29 21-26 44. 32-27 1/2-1/2


[Event "Match om het wereldkampioenschap"]
[Site "Deventer NLD"]
[Date "1983.11.06"]
[Round "13"]
[White "Van der Wal, Jannes"]
[Black "Wiersma, Harm"]
[Result "1/2-1/2"]

1. 32-28 17-22 2. 28x17 11x22 3. 37-32 6-11 4. 41-37 12-17 5. 46-41 8-12 6.
34-29 19-23 7. 40-34 14-19 8. 45-40 10-14 9. 32-28 23x32 10. 37x28 16-21 11.
41-37 5-10 12. 38-32 11-16 13. 43-38 3-8 14. 31-26 20-24 15. 29x20 15x24 16.
37-31 1-6 17. 31-27 22x31 18. 26x37 21-27 19. 32x21 17x26 20. 49-43 16-21 21.
36-31 6-11 22. 38-32 21-27 23. 32x21 26x17 24. 43-38 18-23 25. 37-32 13-18 26.
42-37 18-22 27. 48-43 8-13 28. 47-42 10-15 29. 50-45 11-16 30. 34-29 23x34 31.
40x20 15x24 32. 45-40 16-21 33. 31-27 22x31 34. 37x26 12-18 35. 40-34 18-23
36. 42-37 13-18 37. 37-31 7-11 38. 34-29 23x34 39. 39x30 18-22 40. 31-27 22x31
41. 26x37 9-13 42. 44-39 13-18 43. 28-22 18x27 44. 32-28 4-10 45. 28-23 19x28
46. 33x31 17-22 47. 30x19 14x23 48. 31-26 21-27 49. 35-30 10-15 50. 37-32
11-16 51. 32x21 16x27 52. 30-24 2-8 53. 39-34 8-12 54. 34-30 22-28 55. 30-25
12-18 56. 25-20 18-22 57. 20-14 1/2-1/2


[Event "Match om het wereldkampioenschap"]
[Site "Heerenveen NLD"]
[Date "1983.11.10"]
[Round "14"]
[White "Wiersma, Harm"]
[Black "Van der Wal, Jannes"]
[Result "1-0"]

1. 32-28 17-22 2. 28x17 11x22 3. 34-29 19-23 4. 40-34 14-19 5. 37-32 10-14 6.
41-37 5-10 7. 46-41 12-17 8. 45-40 6-11 9. 31-26 7-12 10. 36-31 2-7 11. 32-28
23x32 12. 37x28 19-23 13. 28x19 14x23 14. 31-27 22x31 15. 26x37 10-14 16.
35-30 14-19 17. 40-35 17-22 18. 30-24 19x30 19. 34x14 9x20 20. 37-32 23x34 21.
39x30 4-9 22. 44-39 22-27 23. 32x21 16x27 24. 33-28 1-6 25. 50-44 18-22 26.
28x17 11x22 27. 41-37 6-11 28. 30-25 11-17 29. 25x14 9x20 30. 35-30 20-24 31.
30x19 13x24 32. 39-34 12-18 33. 43-39 7-12 34. 39-33 8-13 35. 44-40 15-20 36.
40-35 13-19 37. 49-43 3-9 38. 34-30 27-32 39. 37x28 20-25 40. 42-37 25x34 41.
37-31 9-13 42. 47-42 24-30 43. 35x24 19x30 44. 28-23 18x29 45. 33x35 22-28 46.
31-27 12-18 47. 38-32 28x37 48. 42x31 13-19 49. 31-26 19-23 50. 27-21 17-22
51. 21-16 1-0


[Event "Match om het wereldkampioenschap"]
[Site "Heerenveen NLD"]
[Date "1983.11.11"]
[Round "15"]
[White "Van der Wal, Jannes"]
[Black "Wiersma, Harm"]
[Result "1/2-1/2"]

1. 32-28 19-23 2. 28x19 14x23 3. 34-30 10-14 4. 30-25 13-19 5. 40-34 8-13 6.
45-40 2-8 7. 50-45 20-24 8. 31-26 14-20 9. 25x14 9x20 10. 37-32 5-10 11. 41-37
4-9 12. 37-31 10-14 13. 42-37 17-21 14. 26x17 12x21 15. 34-29 23x34 16. 40x29
21-26 17. 32-28 18-22 18. 28x17 11x22 19. 48-42 16-21 20. 46-41 21-27 21.
38-32 27x38 22. 43x32 8-12 23. 32-28 12-18 24. 28x17 18-23 25. 29x18 13x11 26.
31-27 9-13 27. 42-38 7-12 28. 37-32 12-18 29. 41-37 1-7 30. 33-28 7-12 31.
37-31 26x37 32. 32x41 12-17 33. 36-31 18-23 34. 38-32 24-30 35. 35x24 20x29
36. 47-42 13-18 37. 42-38 29-33 38. 38x29 23x43 39. 49x38 15-20 40. 38-33
20-24 41. 44-39 14-20 42. 41-37 17-22 43. 28x17 11x22 44. 32-28 24-29 45.
33x15 22x44 46. 15-10 44-50 47. 27-21 19-23 48. 21-16 23-28 49. 10-5 28-32 50.
37x28 50x36 1/2-1/2


[Event "Match om het wereldkampioenschap"]
[Site "Heerenveen NLD"]
[Date "1983.11.12"]
[Round "16"]
[White "Wiersma, Harm"]
[Black "Van der Wal, Jannes"]
[Result "1/2-1/2"]

1. 32-28 17-22 2. 28x17 12x21 3. 33-28 7-12 4. 39-33 11-17 5. 44-39 6-11 6.
50-44 1-6 7. 38-32 19-23 8. 28x19 14x23 9. 32-27 21x32 10. 37x19 13x24 11.
41-37 10-14 12. 37-32 5-10 13. 46-41 14-19 14. 41-37 10-14 15. 43-38 9-13 16.
49-43 2-7 17. 33-28 4-9 18. 38-33 17-22 19. 28x17 12x21 20. 42-38 21-26 21.
31-27 18-22 22. 27x18 13x22 23. 47-42 16-21 24. 33-28 22x33 25. 39x28 8-12 26.
44-39 12-18 27. 37-31 26x37 28. 42x31 21-26 29. 39-33 26x37 30. 32x41 18-22
31. 28x17 11x22 32. 34-30 9-13 33. 41-37 6-11 34. 38-32 24-29 35. 33x24 20x29
36. 43-38 19-23 37. 48-43 13-18 38. 40-34 29x40 39. 45x34 11-17 40. 38-33 7-12
41. 43-38 17-21 42. 33-29 12-17 43. 36-31 3-9 44. 38-33 14-19 45. 29-24 9-13
46. 33-29 21-26 47. 32-27 23-28 48. 27-21 28-32 49. 21x14 32x41 50. 29-23
26x37 51. 23-18 13-19 1/2-1/2


[Event "Match om het wereldkampioenschap"]
[Site "Heerenveen NLD"]
[Date "1983.11.13"]
[Round "17"]
[White "Van der Wal, Jannes"]
[Black "Wiersma, Harm"]
[Result "1/2-1/2"]

1. 32-28 19-23 2. 28x19 14x23 3. 37-32 10-14 4. 41-37 5-10 5. 46-41 14-19 6.
32-28 23x32 7. 37x28 10-14 8. 41-37 18-23 9. 47-41 23x32 10. 37x28 12-18 11.
35-30 18-23 12. 30-25 23x32 13. 38x27 17-21 14. 42-37 21x32 15. 37x28 7-12 16.
43-38 12-18 17. 49-43 1-7 18. 38-32 7-12 19. 43-38 18-23 20. 48-43 12-18 21.
41-37 20-24 22. 34-29 23x34 23. 40x20 15x24 24. 39-34 18-23 25. 34-29 23x34
26. 44-40 24-29 27. 33x24 19x30 28. 40x29 14-19 29. 25x34 19-23 30. 29x18
13x42 31. 37x48 16-21 32. 50-44 8-13 33. 43-38 13-18 34. 44-39 11-16 35. 48-42
6-11 36. 32-28 11-17 37. 42-37 2-8 38. 31-26 21-27 39. 34-29 8-13 40. 37-31
17-22 41. 28x17 16-21 42. 31x22 21x12 43. 39-33 18x27 44. 38-32 27x38 45.
33x42 12-17 46. 36-31 3-8 47. 31-27 17-22 48. 27x18 13x22 49. 26-21 8-12 50.
29-23 9-13 51. 45-40 13-18 52. 23-19 22-28 53. 42-38 18-22 1/2-1/2


[Event "Match om het wereldkampioenschap"]
[Site "Heerenveen NLD"]
[Date "1983.11.15"]
[Round "18"]
[White "Wiersma, Harm"]
[Black "Van der Wal, Jannes"]
[Result "1/2-1/2"]

1. 32-28 19-23 2. 28x19 14x23 3. 33-28 23x32 4. 37x28 10-14 5. 39-33 14-19 6.
44-39 5-10 7. 41-37 10-14 8. 35-30 20-25 9. 30-24 19x30 10. 28-23 18x29 11.
33x35 12-18 12. 39-33 13-19 13. 38-32 7-12 14. 32-28 8-13 15. 50-44 2-8 16.
44-39 4-10 17. 37-32 14-20 18. 46-41 17-22 19. 28x17 12x21 20. 41-37 1-7 21.
33-28 10-14 22. 39-33 21-26 23. 31-27 7-12 24. 42-38 11-17 25. 47-42 17-22 26.
28x17 12x21 27. 33-28 18-22 28. 28x17 21x12 29. 32-28 6-11 30. 49-44 12-17 31.
44-39 17-21 32. 37-32 11-17 33. 39-33 19-24 34. 42-37 17-22 35. 27x18 13x22
36. 28x17 21x12 37. 36-31 9-13 38. 31-27 14-19 39. 43-39 12-18 40. 48-43 3-9
41. 33-28 8-12 42. 34-30 25x34 43. 39x30 18-23 44. 43-39 12-17 45. 39-33 24-29
46. 33x24 20x29 47. 40-34 29x40 48. 35x44 15-20 49. 44-39 9-14 50. 45-40 20-24
51. 30-25 13-18 52. 39-33 17-21 53. 40-34 24-30 54. 33-29 30x39 55. 29-24
19x30 56. 25x43 23-29 57. 28-23 18-22 58. 27x18 21-27 59. 32x21 16x27 60.
23x34 27-31 61. 18-13 31x33 62. 13-8 26-31 63. 8-3 14-20 64. 3x25 33-38 65.
43x32 31-36 1/2-1/2


[Event "Match om het wereldkampioenschap"]
[Site "Heerenveen NLD"]
[Date "1983.11.16"]
[Round "19"]
[White "Van der Wal, Jannes"]
[Black "Wiersma, Harm"]
[Result "1/2-1/2"]

1. 32-28 17-22 2. 28x17 12x21 3. 35-30 20-25 4. 33-29 7-12 5. 39-33 19-23 6.
40-35 14-19 7. 43-39 10-14 8. 48-43 11-17 9. 44-40 6-11 10. 31-26 1-6 11.
50-44 14-20 12. 30-24 19x30 13. 35x24 21-27 14. 33-28 23x32 15. 37x28 4-10 16.
40-35 17-21 17. 26x17 11x33 18. 39x28 12-17 19. 44-40 27-31 20. 36x27 18-22
21. 27x18 13x33 22. 49-44 9-14 23. 44-39 33x44 24. 40x49 8-13 25. 43-39 14-19
26. 45-40 19x30 27. 35x24 10-14 28. 38-33 17-22 29. 49-44 14-19 30. 40-35
19x30 31. 35x24 5-10 32. 33-28 22x33 33. 39x28 10-14 34. 28-23 3-8 35. 23-18
13x22 36. 24-19 14x23 37. 29x27 20-24 38. 41-37 24-30 39. 44-39 30-35 40.
37-32 8-13 41. 42-38 15-20 42. 46-41 20-24 43. 38-33 13-18 44. 41-36 6-11 45.
47-42 11-17 46. 42-38 17-21 47. 36-31 21-26 48. 32-28 26x37 49. 27-22 18x27
50. 28-22 27x18 51. 38-32 37x28 52. 33x13 2-8 53. 13x2 16-21 54. 2x30 35x24
55. 39-33 1/2-1/2


[Event "Match om het wereldkampioenschap"]
[Site "Heerenveen NLD"]
[Date "1983.11.17"]
[Round "20"]
[White "Wiersma, Harm"]
[Black "Van der Wal, Jannes"]
[Result "1/2-1/2"]

1. 32-28 16-21 2. 33-29 19-23 3. 28x19 13x33 4. 39x28 21-26 5. 37-32 26x37 6.
42x31 14-19 7. 44-39 10-14 8. 39-33 9-13 9. 47-42 17-22 10. 28x17 11x22 11.
50-44 6-11 12. 44-39 11-17 13. 35-30 20-25 14. 32-28 5-10 15. 30-24 19x30 16.
28-23 18x29 17. 33x35 14-19 18. 41-37 10-14 19. 38-32 7-11 20. 43-38 1-7 21.
49-43 12-18 22. 46-41 7-12 23. 31-27 22x31 24. 37x26 18-22 25. 41-37 12-18 26.
39-33 14-20 27. 32-28 11-16 28. 37-31 8-12 29. 34-30 25x34 30. 40x29 20-24 31.
29x20 15x24 32. 45-40 4-10 33. 40-34 2-8 34. 34-29 10-15 35. 29x20 15x24 36.
33-29 24x33 37. 28x39 19-23 38. 39-33 13-19 39. 38-32 8-13 40. 42-38 23-29 41.
33x24 19x30 42. 35x24 22-28 43. 32x23 18x20 44. 43-39 20-24 45. 39-34 13-18
46. 38-33 16-21 47. 48-42 3-9 48. 42-38 18-23 49. 38-32 9-13 50. 33-28 23-29
51. 34x23 1/2-1/2