LSS-Лехенихский шахматный сервер

[TCH]

Я послал владельцу запрос насчет пропавших из базы рейтингов, он ответил, что сделал это специально:
"Currently done by purpose. When loading older games, the wrong ratings would be shown. I need to make a program which adds the current rating to a game, when it is finished. Need some time for that."

[Witek]

No Pasaran!, проверил базу 2017 из шапки- нет рейтинга со старого сервера.
Но много пропущенных турниров .Хотя за пару лет все было нормально.

[TCH]

Кстати, идея ставить старым партиям текущий рейтинг игрока по меньшей мере спорна. Ниоткуда не следует, что человек с рейтингом 2500 пять лет назад играл в ту же силу, что и сегодня. И уж лучше иметь в базе заниженный рейтинг, чем завышенный.

[Witek]

Нормально, когда в турнирной таблице сохраняется рейтинг на начало турнира. Рейтинг лист публикуется на 1.01 каждого года.
Сейчас кроме ИКЧФ сохраняется лишь текущий .
На LSS рейтинг уже раза 3 менялся на новом сервере.

[Witek]

Развернуть для просмотра

Dear Chessfriends,

below are some comments on the rating calculations. To save time I am using this form of communication instead of answering messages ans tickets individually.

Summary of the changes to the LSS Rating Calculations

Before and during the start of the new server version, I did not found the time to describe the updates to the rating system, as it will take some time to get the texts and formulas formatted properly.

Here are some key points:

A No-Engine rating has been introduced. The No-Engine games are no longer incorporated into the Standard Chess Ratings as before.
Both the Chess960 rating and the No-Engine Rating have a start rating of 1600 which is applied to all players, when they start such an event. Start rating of Standard Chess for unrated players is still 800.
The rating cutoff was implemented wrongly in the old system. It should protect strong players against new players with no or unknown ratings, as they are getting a starting rating of 800. Loosing against them would deteriorate the stronger players ratings. If the new player would have given his national or ICCF rating, the situation would be different. However, the cutoff was also (wrongly) applied when a much weaker player has beaten. This led to the award of one rating point even for very easy wins. This is not in relation to winning against a player with 200 points less, which was worth only 2 points.
Even worse the other way round. A weak player would always loose at least one point when he is loosing a game against a much much stronger player. This was leading to situations where players could achieve negative ratings. This is now corrected.

Withdrawals are now handled differently. All games are now adjudicated. If a clear win for the non-withdrawing player is detected, the game is handled as finished regularly (this did not change).
If the adjudication would not show a win, a special process is applied: At first the rating change is calculated as if the game had finished regularly. This rating change is then modified by a modification factor depending on the number of played moves. The longer a game lasts, the larger the factor becomes. Games with less than 21 half moves (i. e. 10 executed moves by White and Black) are not rated.
The maximum rating loss per day is restricted to 200 points.
When a player forfeited a game, then his rating is "frozen" for some time. In case of further forfeited games, the opponents would now get the rating change calculated based on the same rating as was used for the first forfeited game. In the past we had the case that the last rating change calculation was based on a 300 points lower rating than used a day before.
For players with a rating of 1800 or higher, a bonus is added if a game is won and the opponents rating is less than 150 worse than the own rating (i. e. if I do have a rating of 1800, all wins against players with 1650+ get the bonus. If I do have a rating of 2400, the bonus is applied for opponets with 2250+). The bonus depends on the own rating and the delta to the opponents ratings. Higher own ratings lead to higher bonuses, as the assumption is that it is more difficult to win a game at higher rating levels than at lower levels.
A rating history graph is now available
All ratings are recalculated from 2009 onwards. This is the reason why you cannot compare the ratings of the old server to the ratings of the new server. However, on average, the changes lead to a higher rating level than in the old rating system.

Looking into the data recently, I have seen that some bonus values looked excessive. A win of a 2400 player against a 2700 player following the formulas of Arpad Elo would have driven a change of about 8 points, the bonus would have been about 2.5 times as high. The original aim was to have the bonus about the same size of the base change in the high rating range and smaller when ratings are lower.

This correction has been implemented yesterday and the complete result set from back in 2009 was recalculated today. Therefore, a comparison from a rating from last week or even yesterday to the rating run of earlier today is not applicable, as the formulas have changed.

In future the recalculation of the complete set will be applied only in rare situations. A routine is in place to recalculate ratings of the last four weeks to catch late changes of results or restarted games.

I hope that this answers some questions and shares sufficient light onto the rating calculation until the official Rules pages are available.

Ortwin Pätzold

[свернуть]

Правила пересчета рейтинга

[Vasilievich]

Что случилось?
Три дня не могу зайти на сервер

[byan_mivv]

Ну что ВЫ, каждый день захожу. После Ваших слов тоже...

[Vasilievich]

Цитата: Сообщение от byan_mivv

Ну что ВЫ, каждый день захожу. После Ваших слов тоже...

У меня открывается первая ознакомительная страница
и предлагает зарегистрироваться
Что делать?

[byan_mivv]

Не знаю, что посоветовать - пожалуй уйду от ответа...

[Estet]

А у меня ещё одно первое место в финале очередного кубка ЛСС https://www.chess-server.net/ru/tour/table?tourid=41640

[Daiver]

Цитата: Сообщение от Vasilievich

У меня открывается первая ознакомительная страница
и предлагает зарегистрироваться
Что делать?

такая же ерунда

[Estet]

Цитата: Сообщение от Vasilievich

У меня открывается первая ознакомительная страница
и предлагает зарегистрироваться
Что делать?

Цитата: Сообщение от Daiver

такая же ерунда

После обновления интерфейса на странице входа появляется такой текст (у меня он по-русски, у кого-то другого, наверное, по-английски), делее цитата:
"Уважаемые шахматисты,
По техническим причинам некоторые индивидуальные номера должны быть изменены при перенастройке сервера. Если Вам не удается авторизоваться с именем пользователя, которое Вы обычно используете, пожалуйста запросите новый логин используя кнопку "Забыли Ваш логин". Вами будет получен новый логин на электронную почту, который будет сохранен сервером. Заметьте: Вам не надо проходить регистрацию заново!
Ваш пароль не менялся. Если по каким то причинам Вы забыли свой пароль или он не работает, пожалуйста запросите новый пароль используя кнопку "Забыли пароль" (конец цитаты).
Не пробовали воспользоваться теми рекомендациями, которые приведены выше?