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Co Wiersma

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NED · 68 yrs · K=20 · Peak 1870 (Apr 2026)

Best performance: 2018 at Dutch Team Competition 2025-2026 Klasse 5E(Best of 2026)

World #=56688 live, up 1888#58,576 publishedNetherlands #=2395

OCT26 Rating

1861

Live Rating

1871.4

Change

+10.4

Games Played

1

Rating History · Classical

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Classical games since the October list

TournamentScoreChange
Dutch Team Competition 2026-2027 Klasse 4BSep 19 – Apr 17, 2027TPR 26721/1+10.4

Event timeline · Classical

1 of 38 events · All years

Events before the current rating period show the performance, not a rating change.

Live events show the rating change; earlier events show the performance rating.

Recent opponents · Classical

Jayden Breider

Rated near Co Wiersma · Classical

World

  1. #=56670Jesus Pablo Martinez Rubio1871.6
  2. #=56670Jovica Askovic1871.6
  3. #=56688Co Wiersma1871.4
  4. #=56688Danilo Bolleman1871.4
  5. #=56688IM Aitkazy Baimurzin1871.4

Netherlands

  1. #=2387Aaron De Koning1872.0
  2. #=2387Jules Van Rossem1872.0
  3. #=2395Co Wiersma1871.4
  4. #=2395Danilo Bolleman1871.4
  5. #=2397Ridens Bolhuis1871.2

Live ratings projected from the OCT26 published list · Not affiliated with FIDE