Grzegorz Jastrzębski

Profile image of Grzegorz Jastrzębski
Full name: Grzegorz Jastrzębski
Current rank: 81 since Sept. 16, 2019
Highest Rank: 75 first reached Sept. 9, 2019 (1 week in total)
2019 race rank: 74
2018: =326
2017: =385
2016: =330
2015: =191
Titles/finals: 0/0

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 table headers to sort.

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
20190824 Ostroda 2019 third place match
Jerzy Kozłowski
1414
1461
-47
43.3 %
37.5 %
-5.8 %
Lose
Lost
-
65
1385
-29
20190824 Ostroda 2019 semi-final
Krzysztof Kostera
1433
1600
-167
27.7 %
16.7 %
-11.0 %
Lose
Lost
-
66
1414
-19
20190824 Ostroda 2019 round of 8
Krystian Kucharski
1399
1409
-10
48.6 %
100.0 %
+51.4 %
Lose
Won
Upset Win
68
1433
+34
20190523 Lublin 2019 round of 8
Krzysztof Kostera
1425 P
1520 P
-95
36.7 %
16.7 %
-20.0 %
Lose
Lost
-
70
1399
-26
20190126 Ostroda Winter 2019 round of 8
Krzysztof Kostera
1460 P
1473 P
-13
48.1 %
28.6 %
-19.6 %
Lose
Lost
-
72
1425 P
-35
20150516 Lublin 2015 round of 16
Jacek Kwapiński
1500 P
1478 P
+22
53.2 %
25.0 %
-28.2 %
Win
Lost
Loss
74
1460 P
-40

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