Thanks for taking the time to review the Puget Sound Table Tennis Club (PSTTC) League Rating System! Although our club has gone through many changes over the 30+ years it has been running we always strive to make the PSTTC league rating system as USATT accurate as possible.
The USATT (United States Association of Table Tennis) rating system is made up of a complex system of calculations that are done in a certain order after tournament matches have been completed and sent into the USATT staff. Here at PSTTC we want to make sure that ALL players have the same opportunity to win points, move up to new groups, play others of similar ability, BUT most importantly have a great time and get some exercise!
The USATT rating system can be found at http://www.usatt.org/ratings/ratingsprocess.html .
The Puget Sound Table Tennis Club League Rating System (PSTTC LRS) is comprised of almost an identical system as the USATT but with some variations that help us apply rating changes to a league setting apposed to a tournament format.
At the time league is started (7:15 pm Tuesday night) you will be assigned into a group based on your current rating. If you are new and don’t know what your rating is then a team member will hit a few balls with you and give you an approximate rating where you can start.
Groups are comprised of 5-9 players (it will vary from week to week depending on attendance). All players in a group are assigned 4 matches to play in a set order. If your current opponent is not available (for whatever reason) it is alright to play another match “Out Of Order” with someone that is available as long as it does not disrupt the league environment.
Once PSTTC League has began-
Any time a match is played and completed the outcome will be as follows
The winner will circle their number on the match order list according to the number that has been assigned to them for that league. The play charts are provided at PSTTC League every Tuesday.
Step 2 –
If two people do not play each other then no number should be circled.
Step 3 –
Depending on the RATING DIFFERENCE between two players, scoring will follow these guidelines…
|Point Spread Between Players||Expected Result (Higher Rated Player Wins: number of points exchanged)||Upset Result (Lower Rated Player Wins: number of points exchanged)|
|0 – 12||8||8|
|13 – 37||7||10|
|38 – 62||6||13|
|63 – 87||5||16|
|88 – 112||4||20|
|113 – 137||3||25|
|138 – 162||2||30|
|163 – 187||2||35|
|188 – 212||1||40|
|213 – 237||1||45|
|238 – 349||0||50|
|350 – 449||0||75|
|450 & Up||0||100|
Player 7 beats player 9 …
The Difference between the two players is 84 points.
Player 7 gained 5 points
Player 9 loses 5 points
(If player 9 had beat player 7, the exchange would be 16 points. 16 points gained for player #9 and 16 points lost for player #7)
ADDITIONAL RATING ADJUSTMENTS
In addition to the standard USATT rating scale we have added a few rating adjustments to help keep the PSTTC LRS more accurate and in line with the USATT rating system.
3 & 1 Adjustment –
Any player that wins 3 and only loses 1 match in a single league session will gain an EXTRA 5 points ON TOP OF their points gained from their won matches.
4 & 0 Adjustment –
A player who wins 4 matches and loses ZERO on their assigned group during one league session will be awarded an ADDITIONAL 15 points ON TOP OF whatever points they may have earned from their matches that session. ALSO, if that same player attends the next following week they will be given the opportunity to play on a higher ranked table. Rules for 4 & 0 ARE AS FOLLOWS:
1 – The player that won 4 & 0 will be moved up ONE group higher from where they would naturally fall according to the ratings of those people that attend the following week.
2 – NO MORE THAN ONE PLAYER CAN MOVE UP PER GROUP. If there is a situation where two or more people that won 4 & 0 the week before are sorted the following week into the same group, ONLY ONE player will move up. The other “4 & 0” players will stay in the group they naturally sorted into. The payer that moves up will be decided as follows:
1st by highest rating, 2nd by winning %, 3rd by attendance and 4th by alphabetical order (FIRST NAME THEN LAST NAME)
3 – If a “4 & 0” winner is sorted and found to move up they CANNOT MOVE UP TO A GROUP WHO’S HIGHEST PLAYER IS RATED 450 POINTS ABOVE the “4 & 0” winner from the previous week. This rule helps keep the “4 & 0” winner from advancing into a group that is EXCESSIVELY above their rating level (which can create frustration) and ALSO makes sure that higher group players are not playing people that are below their level (which can create apathy and lac of incentive).
350 – 449 Adjustment –
If any player beats any other player that is 350 to 499 points ABOVE their rating they will receive a rating adjustment of +75 points INSTEAD OF the points they would normally receive (+50). The HIGHER player will lose a maximum of 50 points UNLESS the lower player won 4 & 0. If the lower player won 4 & 0 IN ADDITION TO beating the higher player then the HIGHER player will only lose the points calculated on the difference of their rating BEFORE LEAGUE compared to the lower player’s rating AFTER LEAGUE, DIVIDED IN HALF and rounded down to the lowest number.
Player 3 beats player 1 and player 3 won 4 & 0
450 & up Adjustment –
If any player beats any other player that is 450 points or more ABOVE their rating they will receive a rating adjustment of +100 points INSTEAD OF the points they would normally receive (+50). The HIGHER player will lose a maximum of 50 points UNLESS the lower player won 4 & 0. If the lower player won 4 & 0 IN ADDITION TO beating the higher player then the HIGHER player will only lose the points calculated on the difference of their rating BEFORE LEAGUE compared to the lower player’s rating AFTER LEAGUE, DIVIDED IN HALF and rounded down to the lowest number.
Same example as above
If any player attends 13 or more times in one season (26 weeks set by club leaders) and has a winning ratio of 70% or higher they will receive a ONE TIME rating adjustment of 100 points. This may seem large but remember that if that same player is not ready to play at that level they can lose those points in one night by losing as little as 2 matches.
Players are only eligible for ONE 70%+ Adjustment Per Season
Rating Loss Cap –
No player can lose more than 100 points in one league session. To ensure that no player is reduced due to a temporary injury, lower player wrongfully rated, unfairly decreased due to an odd situation, or any other mishap, we have added a cap to the total points you can lose in one league session.
Last Updated 10/27/2011
The PSTTC LRS is subject to change at any time at the discretion of the club or it’s leaders. Please contact Jacob Andrew Or Joseph Calugas for details.