Head-to-head
Pick two athletes to see how the race played out between them — by actual time, head start, and checkpoint.
Athlete A
OfficialPhelps Wood
#364 · 1:16:20 · M57 · Group Q · INV
Wave start 8:16 AM (Q-INV)
Athlete B
OfficialBoris E Pialloux
#368 · 1:15:24 · M56 · Group R · INV
Wave start 8:17 AM (R-INV)
Comparison report
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The PDF includes the interpretation, deltas, race timeline, position-through-the-course chart, and segment-by-segment splits shown below.
Interpretation
Phelps (Q-INV) started at 8:16 AM; Boris (R-INV) started at 8:17 AM. That gave Phelps a 1 minute head start on Boris. On foot, Phelps ran 1:16:20 and Boris ran 1:15:24 — Boris was 0:56 faster than Phelps. Phelps took official place 364th (time-based 531st) and Boris took official place 368th (time-based 497th). Phelps's head start was enough to flip the official order even though Boris was faster on foot. Biggest swing: Boris gained 1:07 from Muir Woods to Cardiac.
Deltas
ComputedWave start
Phelps Wood (Q-INV) started 1 min earlier than Boris (R-INV).
- Overall place Δ
- -4
- Actual time Δ
- +0:56
- Section gap Δ
- ±0 (same section)
- Wave start Δ
- 1 min (Phelps earlier)
- Finish clock Δ
- -0:04
- Section place Δ
- +40
Δ = Phelps − Boris. Negative means Phelps is ahead/faster.
Race timeline
Computed- Phelps (Q-INV) started at 8:16 AM.
- Boris (R-INV) started at 8:17 AM, 1:00 later.
- Actual running time: Boris was 0:56 faster on foot than Phelps.
- Finish clock: Phelps crossed the line 0:04 ahead of Boris — Phelps wins this head-to-head.
Δ (A − B): actual +0:56 · finish clock -0:04.
Position through the course
OfficialSegment-by-segment splits
Official| Segment | Phelps | Boris | Δ |
|---|---|---|---|
| Start to Top of Stairs | 8:55 | 9:10 | -0:15 |
| Stairs to Windy Gap | 6:43 | 6:48 | -0:05 |
| Windy Gap to Muir Woods | 6:11 | 6:17 | -0:06 |
| Muir Woods to Cardiac | 29:31 | 28:24 | +1:07 |
| Cardiac to White Gate | 15:19 | 15:29 | -0:10 |
| White Gate to The Stile | 7:31 | 7:13 | +0:18 |
| The Stile to Finish | 2:10 | 2:03 | +0:07 |
Δ negative = Phelps ran the segment faster.