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1 <?xml version="1.0" encoding="UTF-8" ?>
2 <!DOCTYPE
3   html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
4   "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
5 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" xmlns:t="http://template.sesse.net/">
6   <head>
7     <title>Foosball!</title>
8     <link rev="made" href="mailto:sgunderson@bigfoot.com" />
9     <meta name="MSSmartTagsPreventParsing" content="TRUE" />
10   </head>
11   <body>
12     <h1>Foosball!</h1>
13     
14     <h2>Add a singles result</h2>
15
16     <form method="post" action="add-single-result.pl">
17       <table>
18         <tr>
19           <th>User name 1</th>
20           <td><input name="username1" value="" size="10" /></td>
21         </tr>
22         <tr>
23           <th>User name 2</th>
24           <td><input name="username2" value="" size="10" /></td>
25         </tr>
26         <tr>
27           <th>Score</th>
28           <td>
29             <input name="score1" value="" size="2" /> -
30             <input name="score2" value="" size="2" />
31           </td>
32         </tr>
33         <tr>
34           <td colspan="2"><input type="submit" /></td>
35         </tr>
36       </table>
37     </form>
38     
39     <h2>Add a doubles result</h2>
40
41     <form method="post" action="add-double-result.pl">
42       <table>
43         <tr>
44           <th>Team 1 (usernames)</th>
45           <td>
46             <input name="team1_username1" value="" size="10" /> and 
47             <input name="team1_username2" value="" size="10" />
48           </td>
49         </tr>
50         <tr>
51           <th>Team 2 (usernames)</th>
52           <td>
53             <input name="team2_username1" value="" size="10" /> and 
54             <input name="team2_username2" value="" size="10" />
55           </td>
56         </tr>
57         <tr>
58           <th>Score</th>
59           <td>
60             <input name="score1" value="" size="2" /> -
61             <input name="score2" value="" size="2" />
62           </td>
63         </tr>
64         <tr>
65           <td colspan="2"><input type="submit" /></td>
66         </tr>
67       </table>
68     </form>
69
70     <h2>Singles score board</h2>
71
72     <table>
73       <thead>
74         <tr>
75           <th>Username</th>
76           <th>Rating mean</th>
77           <th>Rating deviation</th>
78           <th>Conservative estimate</th>
79           <th>Change since yesterday</th>
80         </tr>
81       </thead>
82       <tbody t:id="singletop">
83         <tr>
84           <td><t:username /></td>
85           <td><t:rating /></td>
86           <td><t:rd /></td>
87           <td><t:lowerbound /></td>
88           <td><t:trend /></td>
89         </tr>
90       </tbody>
91     </table>
92
93     <h2>Doubles score board</h2>
94
95     <table>
96       <thead>
97         <tr>
98           <th>Username</th>
99           <th>Rating mean</th>
100           <th>Rating deviation</th>
101           <th>Conservative estimate</th>
102           <th>Change since yesterday</th>
103         </tr>
104       </thead>
105       <tbody t:id="doubletop">
106         <tr>
107           <td><t:username /></td>
108           <td><t:rating /></td>
109           <td><t:rd /></td>
110           <td><t:lowerbound /></td>
111           <td><t:trend /></td>
112         </tr>
113       </tbody>
114     </table>
115
116     <h2>Last ten games</h2>
117
118     <table>
119       <thead>
120         <tr>
121           <th>Registered</th>
122           <th>Type</th>
123           <th colspan="2">Opponents</th>
124           <th>Score</th>
125         </tr>
126       </thead>
127       <tbody t:id="lastgames">
128         <tr>
129           <td><t:gametime /></td>
130           <td><t:type /></td>
131           <td><t:username1 /></td>
132           <td><t:username2 /></td>
133           <td><t:score1 /> &#8211; <t:score2 /></td>
134         </tr>
135       </tbody>
136     </table>
137
138     <h2>About the ratings</h2>
139
140     <p>The rating system is a modified Glicko 1 variant, adjusted for teams
141       (with some ideas from Microsoft's TrueSkill system) and non-binary results.
142       For those not familiar with these ratings, the most important parts are:</p>
143
144     <ul>
145       <li>Your rating is a <em>statistical estimation</em> of your true skill.
146         It has a mean (the point estimate of your skill) and a deviation
147         (measuring the uncertainity of the estimate), called the RD. It is approximately
148         Gaussian (actually logistic).</li>
149       <li>When you win or lose a game, your rating will change accordingly,
150         based on your score and your opponent. <em>You do not get 'points'
151         for winning or losing, the estimate is merely getting more accurate.</em>
152         In the process, the RD gets lower as you play. However, the RD increases
153         with time, opening up for the fact that your true skill can change.
154         (Glicko 2 also supports a volatility measure, which better models change
155         in true skill, but it has not been implemented here.)</li>
156       <li>The score board is sorted by a conservative estimate of your rating
157         (mean - 3 * RD). This makes it non-attractive for people with artifically
158         high ratings (especially newcomers) to avoid playing to stay high up in
159         the score board.</li>
160       <li>The single and double rankings are separate. Even though you play as a
161         team and all four players' rankings and RDs influence the rating adjustment,
162         you are ranked as an individual, as we do not usually play with fixed
163         teams.</li>
164     </ul>
165   </body>
166 </html> 
167