Progress against the field
Jacky Tjeerdsma and David Roose have gained 5:22 on the field from Rotterdam 2024 to Rotterdam 2025.
Over the same races everyone got 4:27 quicker, so 9:49 faster on the clock looks better than it was.
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
4 races · 4 events
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Heerenveen9 May 2025Individual Open · Women1:44:35 PB410/571Beat 28%
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Rotterdam27 Feb 2025Doubles Open · Mixed1:26:04 PB208/353Beat 41%
↑ 327 days after Rotterdam 2024, with David Roose 5:22 better than the field Why ↓Close ↑
9:49 faster on the clock, and the race was 4:27 faster for everyone, so 5:22 of it was this pair.
The fieldCompare these two →4:27 faster This pair9:49 faster -
Amsterdam10 Oct 2024Individual Pro · Women1:49:26 PB55/61Beat 10%
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Rotterdam6 Apr 2024Doubles Open · Mixed1:35:53449/534Beat 16%