Progress against the field
From Maastricht 2024 to Rotterdam 2026, the field gained 9:33 on Iris Bosch and John Bosch.
Over the same races everyone got 8:32 quicker, so 1:01 slower on the clock looks better than it was.
The longest gap between two races compared here, 341 days between Heerenveen 2025 and Rotterdam 2026, cost 6:59 on the field.
How this is worked out ⓘ
A finish time moves for two reasons: the athlete, and the race — its course, its floor, its day. For each pair of races in a row in one category, we take everyone who raced both and use the middle of how much they moved (the median) as "the race". Whatever is left is the athlete. Doubles are compared only when the same two people raced both, and told as the pair's; relays are left out. A pair with fewer than 15 athletes in common is not shown.
Every race
5 races · 5 events
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Rotterdam15 Apr 2026Doubles Open · Mixed1:21:25469/1047Beat 55%
↑ 341 days after Heerenveen 2025, with John Bosch 6:59 worse than the field Why ↓Close ↑
6:59 behind the field: 4:20 slower on the clock, against 2:39 faster for everyone.
The fieldCompare these two →2:39 faster This pair4:20 slower -
Amsterdam21 Jan 2026Doubles Pro · Women1:05:04 PB4/34Beat 88%
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Heerenveen9 May 2025Doubles Open · Mixed1:17:05 PB153/492Beat 69%
↑ 211 days after Amsterdam 2024, with John Bosch 0:23 worse than the field Faster on the clock, behind the field Why ↓Close ↑
2:08 faster on the clock, yet the race was 2:31 faster for everyone, so 0:23 was lost on the field.
The fieldCompare these two →2:31 faster This pair2:08 faster -
Amsterdam10 Oct 2024Doubles Open · Mixed1:19:13262/618Beat 58%
↑ 264 days after Maastricht 2024, with John Bosch 2:11 worse than the field Faster on the clock, behind the field Why ↓Close ↑
1:11 faster on the clock looks better than it was: the race was 3:22 faster for everyone, which leaves this 2:11 behind the field.
The fieldCompare these two →3:22 faster This pair1:11 faster -
Maastricht20 Jan 2024Doubles Open · Mixed1:20:24109/230Beat 53%