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Player:  Roel Boomstra 
Age: 26
KNDB-rating on 1-7-2019: 1560
Highest KNDB-rating ever: 1588
Average KNDB-rating all time: 1476 
Virtual KNDB-rating : 1563

FMJD-rating: 2408
Highest FMJD-rating ever: 2432
Average FMJD-rating all time: 2318

(Graphics FMJD-rating in period
KNDB-rating)
     .
     .
DateTournamentOpponentRatGaPtR.diff.N.percN.pts
su 21-07-2019  Nijmegen Open GDB  Erik ten Hagen  1272 1-2288 0.84 1.69
mo 22-07-2019  Nijmegen Open GDB  Tom Swelsen  1131 1-2429 0.93 1.87
mo 22-07-2019  Nijmegen Open GDB  Shammie Kasnadi  1299 1-2261 0.82 1.64
tu 23-07-2019  Nijmegen Open GDB  Jasper Lemmen  1458 1-1102 0.64 1.28
tu 23-07-2019  Nijmegen Open GDB  Artem Ivanov  1509 1-151 0.57 1.14
we 24-07-2019  Nijmegen Open GDB  Aleksej Domchev  1463 1-197 0.63 1.27
th 25-07-2019  Nijmegen Open GDB  Jos Stokkel  1422 1-2138 0.69 1.37
fr 26-07-2019  Nijmegen Open GDB  Johan Krajenbrink  1474 1-186 0.62 1.24
sa 27-07-2019  Nijmegen Open GDB  Geert van Aalten  1376 1-2184 0.74 1.48
sa 05-10-2019  Dutch Teamcompetition KNDB  Berke Yiğittürk  1210 1-2350 0.89 1.78
sa 19-10-2019  Dutch Teamcompetition KNDB  Marcel Monteba  1335 1-2225 0.78 1.57
sa 09-11-2019  Dutch Teamcompetition KNDB  Johan Krajenbrink  1474 1-186 0.62 1.24
sa 23-11-2019  Dutch Teamcompetition KNDB  André Venema  1255 1-1305 0.86 1.71
sa 07-12-2019  Dutch Teamcompetition KNDB  Nick Waterink  1276 1-1284 0.84 1.68
sa 21-12-2019  Dutch Teamcompetition KNDB  Gerbrand Hessing  1296 1-2264 0.82 1.64
sa 04-01-2020  Dutch Teamcompetition KNDB  Joost Hooijberg  1326 1-2234 0.79 1.59
sa 18-01-2020  Dutch Teamcompetition KNDB  Ron Heusdens  1466 1-194 0.63 1.26
 Total:17-2625.43
 Correctionfactor:5 (779 g.)
 Calculation:26-25.43 x5=2.83
 Virtual rating: 1563
 Aver.rating: 1355 Perc.:0.76Diff.: 206
 TPR: 1355 +206 1561
* official KNDB-rating can be not the same as virtual rating because of new iRp-check