| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. A Watanabe vs K Spraggett |
| 1-0 | 40 | 1999 | Cappelle Open | E92 King's Indian |
| 27. A Watanabe vs R Gunawan |
| 1-0 | 48 | 2000 | Istanbul Olympiad | E41 Nimzo-Indian |
| 28. E Sapar vs A Watanabe |
| ½-½ | 35 | 2000 | Istanbul Olympiad | E06 Catalan, Closed, 5.Nf3 |
| 29. A Watanabe vs A Volzhin |
| 1-0 | 32 | 2000 | Carlos Torre Memorial | E48 Nimzo-Indian, 4.e3 O-O 5.Bd3 d5 |
| 30. A Watanabe vs N Mitkov |
| 0-1 | 33 | 2000 | Carlos Torre Memorial | E46 Nimzo-Indian |
| 31. A Wojtkiewicz vs A Watanabe |
| 1-0 | 44 | 2000 | Carlos Torre Memorial | E06 Catalan, Closed, 5.Nf3 |
| 32. R Huerta vs A Watanabe |
| 0-1 | 20 | 2000 | Carlos Torre Memorial | B21 Sicilian, 2.f4 and 2.d4 |
| 33. A Watanabe vs R E Espinosa Flores |
| 1-0 | 53 | 2000 | Carlos Torre Memorial | A72 Benoni, Classical without 9.O-O |
| 34. W Arencibia Rodriguez vs A Watanabe |
| 1-0 | 53 | 2000 | Carlos Torre Memorial | A01 Nimzovich-Larsen Attack |
| 35. A Watanabe vs J Contreras Torres |
| 1-0 | 33 | 2000 | Carlos Torre Memorial | A93 Dutch, Stonewall, Botvinnik Variation |
| 36. A Watanabe vs Kudrin |
| 0-1 | 34 | 2000 | Carlos Torre Memorial | D85 Grunfeld |
| 37. S Garcia Martinez vs A Watanabe |
| 1-0 | 42 | 2000 | Carlos Torre Memorial | D58 Queen's Gambit Declined, Tartakower (Makagonov-Bondarevsky) Syst |
| 38. A Watanabe vs J Berry |
| ½-½ | 74 | 2003 | Carlos Torre mem op 16th | A41 Queen's Pawn Game (with ...d6) |
| 39. A Watanabe vs Y Quesada Perez |
| 0-1 | 66 | 2005 | XVIII Memorial Carlos Torre | E48 Nimzo-Indian, 4.e3 O-O 5.Bd3 d5 |
| 40. F de Cresce El Debs vs A Watanabe |
| 1-0 | 42 | 2008 | Euwe Stimulans | E92 King's Indian |
| 41. A Watanabe vs Van der Wiel |
| 0-1 | 35 | 2008 | Euwe Stimulans | E41 Nimzo-Indian |
| 42. Z Zhao vs A Watanabe |
| 1-0 | 53 | 2008 | Euwe Stimulans | B80 Sicilian, Scheveningen |
| 43. A Watanabe vs N Diaz Hollemaert |
| 0-1 | 25 | 2008 | Euwe Stimulans | A42 Modern Defense, Averbakh System |
| 44. C Lujan vs A Watanabe |
| 0-1 | 70 | 2008 | Euwe Stimulans | A07 King's Indian Attack |
| 45. A Watanabe vs E Matsuura |
| 1-0 | 25 | 2008 | Euwe Stimulans | D11 Queen's Gambit Declined Slav |
| 46. O Zambrana vs A Watanabe |
| ½-½ | 24 | 2008 | Euwe Stimulans | B97 Sicilian, Najdorf |
| 47. A Watanabe vs G Milos |
| 0-1 | 27 | 2008 | Euwe Stimulans | E44 Nimzo-Indian, Fischer Variation, 5.Ne2 |
| 48. A Watanabe vs B Roselli Mailhe |
| 0-1 | 41 | 2008 | Euwe Stimulans | E92 King's Indian |
| 49. A Rwamavubi vs A Watanabe |
| 0-1 | 34 | 2012 | Istanbul Olympiad | D03 Torre Attack (Tartakower Variation) |
| 50. V Sipila vs A Watanabe |
| 0-1 | 39 | 2012 | Istanbul Olympiad | E98 King's Indian, Orthodox, Taimanov, 9.Ne1 |
Kibitzing
