Jan Zdunkiewicz

Profile image of Jan Zdunkiewicz
Full name: Jan Zdunkiewicz
Current rank: 59th since September 15, 2025
Highest Rank: 57th first reached August 25, 2025 (2 weeks in total)
Highest Year-End Rank: 75th (2021)
Titles/finals: 0/0
Elo Rating: 1446

Elo Ratings per Match since January 2013

Choose a table: Match scores, player Elo ratings, player rankings.

A player's elo rating is considered provisional (P) until they have either completed six matches or played matches at at least three different tournaments.

The probability of winning is equal to the predicted share of points scored. A player rated 200 above another corresponds to a 76% chance of winning.

The K value is a development coefficient, and it reduces large swings in the ratings of established players. The K value reduces over time, similar to 538's elo ratings for tennis players: 250/((player's match count+15)**(0.4)))-10

Click on column headers to sort the table.

Date Tournament Round Opponent   Elo Rating
Player

Opponent

Difference
  Share of Points
Predicted

Actual

Difference
  Final Result
Predicted

Actual

Difference
K-Factor Next Elo Change
2025‑08‑20 Enklawa 2025
third place match
Grzegorz Jastrzębski
Won
1407
1563
-156
28.9 %
62.5 %
+33.6 %
Lose
Won
Upset Win
55
1446
+39
2025‑08‑20 Enklawa 2025
semi-final
Sebastian Siwiec
Lost
1416
1706
-290
15.9 %
37.5 %
+21.6 %
Lose
Lost
-
55
1407
-9
2025‑08‑20 Enklawa 2025
round of 8
Miłosz Budka
Won
1386
1421
-35
45.0 %
62.5 %
+17.5 %
Lose
Won
Upset Win
56
1416
+30
2025‑08‑16 OFCA 2025
round of 8
Krzysztof Kostera
Lost
1391
1826
-435
7.6 %
16.7 %
+9.1 %
Lose
Lost
-
57
1386
-5
2025‑01‑30 Enklawa Winter 2025
round of 8
Jerzy Kozłowski
Lost
1401
1683
-282
16.5 %
16.7 %
+0.2 %
Lose
Lost
-
58
1391
-10
2024‑08‑23 Ostroda 2024
round of 8
Sebastian Siwiec
Lost
1414
1645
-231
20.9 %
44.4 %
+23.5 %
Lose
Lost
-
60
1401
-13
2024‑08‑23 Ostroda 2024
round of 16
Łukasz -Otto- Wójcik
Won
1384
1388
-4
49.4 %
83.3 %
+33.9 %
Lose
Won
Upset Win
61
1414
+30
2023‑07‑28 Carnaval Sztukmistrzow 2023
round of 8
Krzysztof Kostera
Lost
1390
1800
-410
8.6 %
0.0 %
-8.6 %
Lose
Lost
-
62
1384
-6
2023‑07‑20 Ostroda 2023
round of 8
Sebastian Siwiec
Lost
1414
1500 P
-86
37.9 %
37.5 %
-0.4 %
Lose
Lost
-
63
1390
-24
2022‑07‑30 Carnaval Sztukmistrzow 2022
round of 8
Marcin Borkowski
Lost
1447
1445
+2
50.3 %
0.0 %
-50.3 %
Win
Lost
Upset Loss
65
1414
-33
2022‑07‑23 Ostroda 2022
third place match
Krzysztof Czarski
Lost
1478
1500
-22
46.8 %
37.5 %
-9.3 %
Lose
Lost
-
66
1447
-31
2022‑07‑23 Ostroda 2022
semi-final
Jerzy Kozłowski
Lost
1504
1591
-87
37.7 %
0.0 %
-37.7 %
Lose
Lost
-
68
1478
-26
2022‑07‑23 Ostroda 2022
round of 8
Jakub Czekała
Won
1458 P
1577
-119
33.5 %
62.5 %
+29.0 %
Lose
Won
Win
70
1504
+46
2021‑08‑20 Ostroda 2021
round of 8
Krzysztof Kostera
Lost
1474 P
1698
-224
21.6 %
0.0 %
-21.6 %
Lose
Lost
-
72
1458 P
-16
2019‑08‑24 Ostroda 2019
round of 8
Jakub Czekała
Lost
1500 P
1616
-116
33.9 %
0.0 %
-33.9 %
Lose
Lost
-
74
1474 P
-26

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