| Name: | Heinz Zweifel |
| Federation: |  |
| Years: | 1999 - 2003 |
| Total Games: | 5 |
| Wins: | 2 (40 %) |
| Draws: | 0 (0 %) |
| Losses: | 3 (60 %) |
| Score: | 40 % |
| Tournament | Date | Elo Avg. | Country |
| Biel ATO op | 07/19/2003 | 208 |  Switzerland |
| SUI-ch Seniors | ??/??/2001 | 518 | Switzerland |
| Weihnachts op-B 23th | 12/26/1999 | 112 | Switzerland |
| ECO | Opening | Games |
| B32 | Sicilian defence | 1 games |
| B73 | Sicilian, dragon, classical, 8.O-O | 1 games |
| B72 | Sicilian, dragon, 6.Be3 | 1 games |
| ECO | Opening | Games |
| B93 | Sicilian, Najdorf, 6.f4 | 1 games |
| B30 | Sicilian defence | 1 games |
| White | ELO W | Black | ELO B | Result | Moves | ECO | Date | Tournament | View |
| Zweifel, H | Kaelber, M | 1-0  |
35 | B32 | 2003 | Biel ATO op |
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| Zweifel, H | Rickenbach, J | 0-1 |
32 | B73 | 2001 | SUI-ch Seniors |
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| Denzinger, K | Zweifel, H | 0-1 |
46 | B93 | 2001 | SUI-ch Seniors |
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| Studer, K | Zweifel, H | 1-0 |
32 | B30 | 2001 | SUI-ch Seniors |
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| Zweifel, H | Steiger, P | 0-1 |
28 | B72 | 1999 | Weihnachts op-B 23th |
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