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1978 Western Idaho Open Boise, Idaho - December 2-3, 1978
| ## | Player | Rating | 1 | 2 | 3 | 4 | Score | Prize |
| 1 | Alan Knowles | 1744 | W11 | D15 | W7 | W16 | W4 | 4½ | $80 |
| 2 | Mark Holm | 1616 | W31 | D4 | W22 | W5 | W8 | 4½ | 80 |
| 3 | Glen Buckendorf | 1668 | W23 | W21 | W10 | L4 | W9 | 4 | 10 |
| 4 | Peter Hess | 2048 | W14 | D2 | W15 | W3 | L1 | 3½ | 30 |
| 5 | Dennis Hansen | 1725 | W30 | W19 | D6 | L2 | W10 | 3½ | |
| 6 | Bob McAlpine | 1585 | W28 | W2 | D5 | L8 | W16 | 3½ | 30 |
| 7 | Ray Wheeler | 1666 | W27 | W17 | L1 | D18 | W15 | 3½ | |
| 8 | Rich Burchett | 1737 | W20 | L10 | W23 | W6 | L2 | 3 | |
| 9 | Larry Parsons | 1858 | W18 | L6 | W27 | W13 | L3 | 3 | 20 |
| 10 | Jack Quisler | 1524 | W24 | W8 | L3 | W21 | L5 | 3 | 7.50 |
| 11 | Bruce Perry | 1449 | L1 | W12 | L16 | W27 | W26 | 3 | 7.50 |
| 12 | Max Wennstrom | 1572 | L17 | L11 | W28 | W25 | W18 | 3 | 7.50 |
| 13 | Bryan Haynes | 1339 | --- | W24 | W29 | L9 | W22 | 3 | 30 |
| 14 | Ron Duncan | 1470 | L4 | L27 | W24 | W23 | W21 | 3 | 7.50 |
| 15 | Noah Tadlock | 1558 | W29 | D1 | L4 | W17 | L7 | 2½ | |
| 16 | Eugene Cowan | 1681 | W25 | D22 | W11 | L1 | L6 | 2½ | |
| 17 | Leland Harmon | Unr. | W12 | L7 | D19 | L15 | W30 | 2½ | 20 |
| 18 | Stewart Sutton | 1455 | L9 | W31 | W25 | D7 | L12 | 2½ | |
| 19 | T.W. Robinson | 1473 | W32 | L5 | D17 | D22 | D20 | 2½ | |
| 20 | George Rasor | 1438 | L8 | W28 | L21 | W29 | D19 | 2½ | |
| 21 | R.L. Spaulding | 975 | Bye | L3 | W20 | L10 | L14 | 2 | |
| 22 | William C. Gosvenor | 1488 | W26 | D16 | L2 | D19 | L13 | 2 | |
| 23 | Jay Austin | 1160 | L3 | W26 | L8 | L14 | W29 | 2 | |
| 24 | John Letterman | Unr. | L10 | L13 | L14 | W31 | W27 | 2 | 2 |
| 25 | Randy Smolensky | 1189 | L16 | W32 | L18 | L12 | W28 | 2 | 2 |
| 26 | Nick Nath | Unr. | L22 | L23 | W31 | W30 | L11 | 2 | 2 |
| 27 | Jack Heistand | 1145 | L7 | W14 | L9 | L11 | L24 | 1 | |
| 28 | Tom Mattson | 1068 | L6 | L20 | L12 | W32 | L25 | 1 | |
| 29 | David Lambert | Unr. | L15 | W30 | L13 | L20 | L23 | 1 | |
| 30 | Vic Waterman | 1368 | L5 | L29 | W32 | L26 | L17 | 1 | |
| 31 | Brian Amelkin | 1086 | L2 | L18 | L26 | L24 | D32 | ½ | |
| 32 | James Mosley | Unr. | L19 | L25 | L30 | L28 | D31 | ½ | |
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