diff --git a/hydro/error.js b/hydro/error.js
index d6dbc07a1..123743b79 100644
--- a/hydro/error.js
+++ b/hydro/error.js
@@ -92,6 +92,12 @@ class ContestNotAttendedError extends ForbiddenError {
         this.params = [tid];
     }
 }
+class ContestAlreadyAttendedError extends ForbiddenError {
+    constructor(tid, uid) {
+        super('You\'ve already attended this contest.');
+        this.params = [tid, uid];
+    }
+}
 class ContestNotLiveError extends ForbiddenError {
     constructor(tid) {
         super('This contest is not live.');
@@ -148,7 +154,7 @@ module.exports = {
     ValidationError, ProblemNotFoundError, TrainingNotFoundError,
     ContestNotFoundError, RecordNotFoundError, SolutionNotFoundError,
     AlreadyVotedError, ContestNotAttendedError, ContestNotLiveError,
-    ContestScoreboardHiddenError
+    ContestScoreboardHiddenError, ContestAlreadyAttendedError
 };
 
 /*
@@ -278,12 +284,6 @@ class InvalidJoinInvitationCodeError(ForbiddenError):
     return 'The invitation code you provided is invalid.'
 
 
-class ContestAlreadyAttendedError(ForbiddenError):
-  @property
-  def message(self):
-    return "You've already attended this contest."
-
-
 class HomeworkScoreboardHiddenError(ForbiddenError):
   @property
   def message(self):
diff --git a/hydro/handler/contest.js b/hydro/handler/contest.js
index 5e65c5369..d26d4bf6c 100644
--- a/hydro/handler/contest.js
+++ b/hydro/handler/contest.js
@@ -14,10 +14,10 @@ const
 
 class ContestHandler extends Handler {
     canViewHiddenScoreboard() {
-        return this.hasPerm(PERM_VIEW_CONTEST_HIDDEN_SCOREBOARD);
+        return this.user.hasPerm(PERM_VIEW_CONTEST_HIDDEN_SCOREBOARD);
     }
     canShowRecord(tdoc, allowPermOverride = true) {
-        if (contest.RULES[tdoc.rule].showRecordFunc(tdoc, new Date())) return true;
+        if (contest.RULES[tdoc.rule].showRecord(tdoc, new Date())) return true;
         if (allowPermOverride && this.canViewHiddenScoreboard(tdoc)) return true;
         return false;
     }
@@ -27,14 +27,15 @@ class ContestHandler extends Handler {
         return false;
     }
     async getScoreboard(tid, isExport = false) {
-        let [tdoc, tsdocs] = await contest.getAndListStatus(tid);
+        let tdoc = await contest.get(tid);
         if (!this.canShowScoreboard(tdoc)) throw new ContestScoreboardHiddenError(tid);
+        let tsdocs = await contest.getMultiStatus(tid).sort(contest.RULES[tdoc.rule].statusSort).toArray();
         let uids = [];
         for (let tsdoc of tsdocs) uids.push(tsdoc.uid);
         let [udict, pdict] = await Promise.all([user.getList(uids), problem.getList(tdoc['pids'])]);
         let ranked_tsdocs = contest.RULES[tdoc.rule].rank(tsdocs);
-        let rows = contest.RULES[tdoc.rule].scoreboard(isExport, this.translate, tdoc, ranked_tsdocs, udict, pdict);
-        return tdoc, rows, udict;
+        let rows = contest.RULES[tdoc.rule].scoreboard(isExport, str => str ? str.toString().translate(this.user.language) : '', tdoc, ranked_tsdocs, udict, pdict);
+        return [tdoc, rows, udict];
     }
     async verifyProblems(pids) {
         console.log(pids);
@@ -61,17 +62,17 @@ class ContestListHandler extends ContestHandler {
         this.response.template = 'contest_main.html';
         let tdocs, qs, tpcount;
         if (!rule) {
-            tdocs = contest.getMulti();
+            tdocs = contest.getMulti().sort({ beginAt: -1 });
             qs = '';
         } else {
             if (!contest.CONTEST_RULES.includes(rule)) throw new ValidationError('rule');
-            tdocs = contest.getMulti({ rule });
+            tdocs = contest.getMulti({ rule }).sort({ beginAt: -1 });
             qs = 'rule={0}'.format(rule);
         }
         [tdocs, tpcount] = await paginate(tdocs, page, constants.CONTEST_PER_PAGE);
         let tids = [];
         for (let tdoc of tdocs) tids.push(tdoc._id);
-        let tsdict = await contest.getListStatus(this.uid, tids);
+        let tsdict = await contest.getListStatus(this.user._id, tids);
         this.response.body = {
             page, tpcount, qs, rule, tdocs, tsdict
         };
@@ -84,7 +85,7 @@ class ContestDetailHandler extends ContestHandler {
     async get({ page = 1 }) {
         this.response.template = 'contest_detail.html';
         let [tsdoc, pdict] = await Promise.all([
-            contest.getStatus(this.tdoc._id, this.uid),
+            contest.getStatus(this.tdoc._id, this.user._id),
             problem.getList(this.tdoc.pids)
         ]);
         let psdict = {}, rdict = {}, attended;
@@ -111,7 +112,7 @@ class ContestDetailHandler extends ContestHandler {
     }
     async post_attend() {
         if (contest.is_done(this.tdoc)) throw new ContestNotLiveError(this.tdoc._id);
-        await contest.attend(this.tdoc._id, this.uid);
+        await contest.attend(this.tdoc._id, this.user._id);
         this.back();
     }
 }
diff --git a/hydro/lib/misc.js b/hydro/lib/misc.js
index d07a4bddc..f27e671ce 100644
--- a/hydro/lib/misc.js
+++ b/hydro/lib/misc.js
@@ -11,6 +11,9 @@ exports.datetime_span = function (dt, relative = true, format = '%Y-%m-%d %H:%M:
         dt.format(format)
     );
 };
+exports.nl2br = function (self) {
+    return self.replace(/\n/gm, '<br>');
+};
 exports.paginate = function* (page, num_pages) {
     let radius = 2, first, last;
     if (page > 1) {
diff --git a/hydro/lib/rank.js b/hydro/lib/rank.js
new file mode 100644
index 000000000..b415599dd
--- /dev/null
+++ b/hydro/lib/rank.js
@@ -0,0 +1,11 @@
+module.exports = function* ranked(diter, equ = (a, b) => a == b) {
+    let last_doc = null;
+    let r = 0, count = 0;
+    for (let doc of diter) {
+        count++;
+        if (count == 1 || !equ(last_doc, doc))
+            r = count;
+        last_doc = doc;
+        yield [r, doc];
+    }
+};
diff --git a/hydro/model/contest.js b/hydro/model/contest.js
index 4a2a7e5d9..4ea3b9279 100644
--- a/hydro/model/contest.js
+++ b/hydro/model/contest.js
@@ -1,6 +1,6 @@
 const
     validator = require('../lib/validator'),
-    { ValidationError, ContestNotFoundError } = require('../error'),
+    { ValidationError, ContestNotFoundError, ContestAlreadyAttendedError } = require('../error'),
     db = require('../service/db.js'),
     coll = db.collection('contest'),
     coll_status = db.collection('contest.status');
@@ -56,7 +56,7 @@ async function getListStatus(uid, tids) {
 }
 async function attend(tid, uid) {
     try {
-        await coll_status.insertOne({ tid, uid });
+        await coll_status.insertOne({ tid, uid, attend: 1 });
     } catch (e) {
         throw new ContestAlreadyAttendedError(tid, uid);
     }
@@ -70,10 +70,10 @@ function is_new(tdoc, days = 1) {
 function is_upcoming(tdoc, days = 1) {
     let now = new Date().getTime();
     let readyAt = tdoc.beginAt.getTime();
-    return (now > readyAt + days * 24 * 3600 * 1000 && now < tdoc.beginAt);
+    return (now > readyAt - days * 24 * 3600 * 1000 && now < tdoc.beginAt);
 }
 function is_not_started(tdoc) {
-    return new Date() < tdoc.beginAt;
+    return (new Date()) < tdoc.beginAt;
 }
 function is_ongoing(tdoc) {
     let now = new Date();
diff --git a/hydro/module/contest/acm.js b/hydro/module/contest/acm.js
index 612a01017..1085221a8 100644
--- a/hydro/module/contest/acm.js
+++ b/hydro/module/contest/acm.js
@@ -1,6 +1,8 @@
 module.exports = {
     TEXT: 'ACM/ICPC',
     check: () => { },
+    showScoreboard: () => true,
+    showRecord: (tdoc, now) => now > tdoc.endAt,
     stat: (tdoc, journal) => {
         let naccept = {}, effective = {}, detail = [], accept = 0, time = 0;
         for (let j in journal) {
diff --git a/hydro/module/contest/oi.js b/hydro/module/contest/oi.js
index 6ee27cd7c..e2ad6d266 100644
--- a/hydro/module/contest/oi.js
+++ b/hydro/module/contest/oi.js
@@ -1,3 +1,5 @@
+const ranked = require('../../lib/rank');
+
 module.exports = {
     TEXT: 'OI',
     check: () => { },
@@ -10,10 +12,13 @@ module.exports = {
             }
         return { score, detail };
     },
-    showScoreboard(tdoc,now){
-        return now>tdoc.endAt; 
+    showScoreboard(tdoc, now) {
+        return now > tdoc.endAt;
     },
-    scoreboard(is_export, _, tdoc, ranked_tsdocs, udict, dudict, pdict) {
+    showRecord(tdoc, now) {
+        return now > tdoc.endAt;
+    },
+    scoreboard(is_export, _, tdoc, ranked_tsdocs, udict, pdict) {
         let columns = [
             { type: 'rank', value: _('Rank') },
             { type: 'user', value: _('User') },
@@ -49,5 +54,6 @@ module.exports = {
             rows.push(row);
         }
         return rows;
-    }
+    },
+    rank: tdocs => ranked(tdocs, (a, b) => a.score == b.score)
 };
\ No newline at end of file
diff --git a/hydro/service/server.js b/hydro/service/server.js
index 5e866f835..f622c5781 100644
--- a/hydro/service/server.js
+++ b/hydro/service/server.js
@@ -252,7 +252,7 @@ class ConnectionHandler {
         return new Promise((resolve, reject) => {
             template.render(name, Object.assign(context, {
                 handler: this,
-                _: this.translate,
+                _: str => str ? str.toString().translate(this.user.language) : '',
                 user: this.user
             }), (error, res) => {
                 console.timeEnd(name);
diff --git a/templates/contest_scoreboard.html b/templates/contest_scoreboard.html
index 202d460c2..6460e88f9 100644
--- a/templates/contest_scoreboard.html
+++ b/templates/contest_scoreboard.html
@@ -1,3 +1,4 @@
+{% set page_name = "contest_scoreboard" %}
 {% extends "layout/basic.html" %}
 {% block content %}
 <div class="row"><div class="medium-12 columns">
@@ -21,25 +22,25 @@
           <tr>
           {%- for column in rows[0] -%}
             <th class="col--{{ column['type'] }}">
-            {% if column['type'] == 'problem_detail' %}
-              <a href="{{ reverse_url('contest_detail_problem' if tdoc['doc_type'] == vj4.model.document.TYPE_CONTEST else 'homework_detail_problem', tid=tdoc['doc_id'], pid=column['raw']['doc_id']) }}" data-tooltip="{{ column['raw']['title'] }}">{{ column['value'] }}</a>
+            {% if column.type == 'problem_detail' %}
+              <a href="{{ reverse_url('contest_detail_problem' , tid=tdoc._id, pid=column.raw._id) }}" data-tooltip="{{ column['raw']['title'] }}">{{ column['value'] }}</a>
             {% else %}
-              {{ column['value'] }}
+              {{ column.value }}
             {% endif %}
             </th>
           {%- endfor -%}
           </tr>
         </thead>
         <tbody>
-        {%- for row in rows[1:] -%}
+        {%- for i, row in rows -%}{% if i>0 %}
           <tr>
             {%- for column in row -%}
               <td class="col--{{ rows[0][loop.index0]['type'] }}">
-              {% if column['type'] == 'user' %}
-                {{ user.render_inline(column['raw'], badge=false) }}
-              {% elif column['type'] == 'record' %}
-              {% if column['raw'] %}
-                <a href="{{ reverse_url('record_detail', rid=column['raw']) }}">{{ column['value']|nl2br }}</a>
+              {% if column.type == 'user' %}
+                {{ user.render_inline(column.raw, badge=false) }}
+              {% elif column.type == 'record' %}
+              {% if column.raw %}
+                <a href="/r/{{ column.raw }}">{{ column.value|nl2br }}</a>
               {% else %}
                 {{ column['value']|nl2br }}
               {% endif %}
@@ -49,7 +50,7 @@
               </td>
             {%- endfor -%}
           </tr>
-        {%- endfor -%}
+        {% endif %}{%- endfor -%}
         </tbody>
       </table>
     </div>
diff --git a/templates/partials/homework_sidebar.html b/templates/partials/homework_sidebar.html
index 1848316e5..dbb290cc3 100644
--- a/templates/partials/homework_sidebar.html
+++ b/templates/partials/homework_sidebar.html
@@ -43,11 +43,11 @@
     {% endif %}
       </li>
     {% endif %}
-    {% if handler.can_show_scoreboard(tdoc, False) %}
+    {% if handler.canShowScoreboard(tdoc, False) %}
       <li class="menu__item"><a class="menu__link" href="{{ reverse_url('homework_scoreboard', tid=tdoc['doc_id']) }}">
         <span class="icon icon-statistics"></span> {{ _('Scoreboard') }}
       </a></li>
-    {% elif handler.can_view_hidden_scoreboard(tdoc) %}
+    {% elif handler.canViewHiddenScoreboard(tdoc) %}
       <li class="menu__item"><a class="menu__link" href="{{ reverse_url('homework_scoreboard', tid=tdoc['doc_id']) }}">
         <span class="icon icon-statistics"></span> {{ _('Scoreboard (Hidden)') }}
       </a></li>