<thead>
<tr>
<th>Username</th>
- <th>Rating mean</th>
- <th>Rating deviation</th>
- <th>Conservative estimate</th>
- <th>Change since yesterday</th>
+ <th>Rating</th>
+ <th>RD</th>
+ <th>Lower bound</th>
+ <th>Since -1d</th>
</tr>
</thead>
<tbody t:id="singletop">
<thead>
<tr>
<th>Username</th>
- <th>Rating mean</th>
- <th>Rating deviation</th>
- <th>Conservative estimate</th>
- <th>Change since yesterday</th>
+ <th>Rating</th>
+ <th>RD</th>
+ <th>Lower bound</th>
+ <th>Since -1d</th>
</tr>
</thead>
<tbody t:id="doubletop">
<th>Type</th>
<th colspan="2">Opponents</th>
<th>Score</th>
+ <th colspan="2">Rating diff.</th>
</tr>
</thead>
<tbody t:id="lastgames">
<td><t:username1 /></td>
<td><t:username2 /></td>
<td><t:score1 /> – <t:score2 /></td>
+ <td><t:diff1 /></td>
+ <td><t:diff2 /></td>
</tr>
</tbody>
</table>
+
+ <h2>Assess a singles match</h2>
+
+ <form method="post" action="assess-single.pl">
+ <table>
+ <tr>
+ <th>User name 1</th>
+ <td><input name="username1" value="" size="10" /></td>
+ </tr>
+ <tr>
+ <th>User name 2</th>
+ <td><input name="username2" value="" size="10" /></td>
+ </tr>
+ <tr>
+ <td colspan="2"><input type="submit" /></td>
+ </tr>
+ </table>
+ </form>
+
<h2>About the ratings</h2>
<p>The rating system in use is called <em>FoosRank</em>, and is specially
- designed for this system. It is a Bayesian rating system, inspired by
- Glicko 1 but re-worked out from scratch with a statistically sound model
- of non-binary results, and adjusted for teams (with some ideas from
- Microsoft's TrueSkill system). For those not familiar with Bayesian
- ratings, the most important parts are:</p>
+ designed for this site. It is a Bayesian rating system, inspired by
+ <a href="http://math.bu.edu/people/mg/glicko/">Glicko</a> but re-worked
+ out from scratch with a statistically sound model of non-binary results,
+ and adjusted for teams (with some ideas from Microsoft's TrueSkill
+ system). For those not familiar with Bayesian ratings, the most important
+ parts are:</p>
<ul>
<li>Your rating is a <em>statistical estimation</em> of your true skill.
It has a mean (the point estimate of your skill) and a deviation
(measuring the uncertainity of the estimate), called the RD. It is approximately
- Gaussian (actually logistic).</li>
+ Gaussian.</li>
<li>When you win or lose a game, your rating will change accordingly,
based on your score and your opponent. <em>You do not get 'points'
for winning or losing, the estimate is merely getting more accurate.</em>
you are ranked as an individual, as we do not usually play with fixed
teams.</li>
</ul>
+
+ <p>For the more technically minded, a
+ <a href="http://home.samfundet.no/~sesse/foosrank.pdf">very rough writeup
+ on the mathematics behind FoosRank</a> is available in PDF format. It is,
+ however, by no means finished.</p>
</body>
</html>