| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. J Fedorowicz vs A Kosten |
| 1-0 | 69 | 1981 | Lewisham International | A29 English, Four Knights, Kingside Fianchetto |
| 27. D E Rumens vs A Kosten |
| ½-½ | 6 | 1981 | Lewisham International | C43 Petrov, Modern Attack |
| 28. A Kosten vs D L Lee |
| 1-0 | 26 | 1981 | Regency Masters | B74 Sicilian, Dragon, Classical |
| 29. Miles vs A Kosten |
| ½-½ | 40 | 1981 | Regency Masters | A65 Benoni, 6.e4 |
| 30. A Kosten vs K Pytel |
| ½-½ | 45 | 1981 | Regency Masters | B30 Sicilian |
| 31. A Kosten vs E Formanek |
| 1-0 | 29 | 1981 | Regency Masters | B96 Sicilian, Najdorf |
| 32. G Kenworthy vs A Kosten |
| 0-1 | 40 | 1981 | Regency Masters | C77 Ruy Lopez |
| 33. D King vs A Kosten |
| ½-½ | 8 | 1981 | Regency Masters | C43 Petrov, Modern Attack |
| 34. A Kosten vs M Hebden |
| 0-1 | 53 | 1981 | Regency Masters | C91 Ruy Lopez, Closed |
| 35. A Kosten vs K Regan |
| 0-1 | 77 | 1981 | Regency Masters | C77 Ruy Lopez |
| 36. A Kosten vs L Pliester |
| ½-½ | 5 | 1981 | Regency Masters | A07 King's Indian Attack |
| 37. A Kosten vs T Mordue |
| 1-0 | 49 | 1982 | Bristol op | B99 Sicilian, Najdorf, 7...Be7 Main line |
| 38. A H Williams vs A Kosten |
 | 0-1 | 24 | 1982 | London League match | A70 Benoni, Classical with 7.Nf3 |
| 39. T C Fox vs A Kosten |
| ½-½ | 72 | 1982 | Bristol op | A67 Benoni, Taimanov Variation |
| 40. A Kosten vs A Whiteley |
| 1-0 | 34 | 1982 | London League match | D78 Neo-Grunfeld, 6.O-O c6 |
| 41. F Parr vs A Kosten |
| ½-½ | 43 | 1982 | British Championship | A45 Queen's Pawn Game |
| 42. A Kosten vs D A Phillips |
| 1-0 | 39 | 1982 | British Championship | C42 Petrov Defense |
| 43. S Taulbut vs A Kosten |
| ½-½ | 18 | 1982 | British Championship | C24 Bishop's Opening |
| 44. A Kosten vs D King |
| 1-0 | 54 | 1982 | British Championship | B33 Sicilian |
| 45. W Hartston vs A Kosten |
| 1-0 | 59 | 1982 | British Championship | D05 Queen's Pawn Game |
| 46. A Kosten vs G H James |
| 1-0 | 40 | 1982 | British Championship | C75 Ruy Lopez, Modern Steinitz Defense |
| 47. C Pritchett vs A Kosten |
| 0-1 | 49 | 1982 | British Championship | C42 Petrov Defense |
| 48. A Kosten vs V Knox |
| 1-0 | 58 | 1982 | British Championship | C75 Ruy Lopez, Modern Steinitz Defense |
| 49. Miles vs A Kosten |
| 1-0 | 54 | 1982 | British Championship | A13 English |
| 50. A Kosten vs M Hebden |
| 1-0 | 36 | 1982 | British Championship | A01 Nimzovich-Larsen Attack |
Kibitzing
