Ratings
2009-07-11: 2009 National Open(USA)
| BARRICELLI Giovanni | 15-49 | HAHN Bill |
| HAHN Bill | 23-41 | ROCKWELL David |
| FANG Randy | 38-26 | HAHN Bill |
| HAHN Bill | 30-34 | CAI Jian |
| HAHN Bill | 48-16 | KATZMAN Sharon |
| PETRIC Vlad | 42-22 | HAHN Bill |
2008-11-20 → 2008-11-22: WOC 2008 (Oslo)(World)
2008-08-23 → 2008-08-24: 2008 Clarence Hewlett Memorial(USA)
2008-07-12 → 2008-08-13: 2008 National Open(USA)
| HAHN Bill | 57-07 | GUDMUNDSSON Thor Orvar |
| VAN DEN BIGGELAAR Nicky | 42-22 | HAHN Bill |
| HAHN Bill | 26-38 | KJELLSTADLI Jonas |
| BUTIN Pierre | 58-06 | HAHN Bill |
| HAHN Bill | 51-13 | PATTARAKUL Nida |
| AUBROECK Patrick | 46-18 | HAHN Bill |
| HAHN Bill | 20-44 | FANG Randy |
| GAERTNER Joerg | 42-22 | HAHN Bill |
| MUNCH Marlena | 41-23 | HAHN Bill |
| HAHN Bill | 48-16 | MURAWSKI Stefan |
| DE BOER Akke-Lien | 30-34 | HAHN Bill |
| HAHN Bill | 31-33 | SHIFMAN Ilya |
| SAWALA Rita | 31-33 | HAHN Bill |
| PETRIC Vlad | 31-33 | HAHN Bill |
| HAHN Bill | 21-43 | ROCKWELL David |
| KATZMAN Sharon | 44-20 | HAHN Bill |
| HAHN Bill | 29-35 | KENNEDY Edmund |
| PLUMMER Eugene | 29-35 | HAHN Bill |
| HAHN Bill | 23-41 | CHITRA Yohanes |
| HAHN Bill | 1-63 | ARMATYS Frank |
| KATZMAN Sharon | 21-43 | HAHN Bill |
| HAHN Bill | 25-39 | PETRIC Vlad |
| HAHN Bill | 53-11 | BISHOP Robert |
| ROCKWELL David | 56-8 | HAHN Bill |
| HAHN Bill | 35-29 | FANG Randy |
| ARMATYS Frank | 31-33 | HAHN Bill |
| FANG Randy | 39-25 | HAHN Bill |
| PETRIC Vlad | 24-40 | HAHN Bill |
| HAHN Bill | 34-30 | ROCKWELL David |
| HAHN Bill | 19-45 | FANG Randy |
| HAHN Bill | 16-48 | PETRIC Vlad |
| ROCKWELL David | 30-34 | HAHN Bill |
2007-08-25 → 2007-08-26: US National Championship 2007(USA)
2007-07-21 → 2007-07-22: US National Open 2007(USA)
| WILLIAMS Eddie | won against | HAHN Bill |
| HAHN Bill | won against | PLUMMER Eugene |
| HAHN Bill | won against | KATZMAN Sharon |
| ROCKWELL David | won against | HAHN Bill |
| CHITRA Yohanes | won against | HAHN Bill |
| ELLIOTT Cathy | lost to | HAHN Bill |
| FANG Randy | won against | HAHN Bill |
| ROCKWELL David | lost to | HAHN Bill |
| WILLIAMS Eddie | won against | HAHN Bill |
| HAHN Bill | won against | KATZMAN Sharon |
| WIENCEK Tom | won against | HAHN Bill |
| FANG Randy | won against | HAHN Bill |
| ARMATYS Frank | won against | HAHN Bill |
| ROCKWELL David | won against | HAHN Bill |