diff --git a/packages/hydrooj/src/handler/contest.ts b/packages/hydrooj/src/handler/contest.ts
index b72adc46..17144e2a 100644
--- a/packages/hydrooj/src/handler/contest.ts
+++ b/packages/hydrooj/src/handler/contest.ts
@@ -5,7 +5,7 @@ import moment from 'moment-timezone';
 import { ObjectID } from 'mongodb';
 import { sortFiles, Time } from '@hydrooj/utils/lib/utils';
 import {
-    BadRequestError, ContestNotFoundError, ContestNotLiveError,
+    BadRequestError, ContestNotEndedError, ContestNotFoundError, ContestNotLiveError,
     ForbiddenError, InvalidTokenError, PermissionError,
     ValidationError,
 } from '../error';
@@ -62,7 +62,7 @@ ScheduleModel.Worker.addHandler('contest', async (doc) => {
             for (const pid of tdoc.pids) {
                 tasks.push(problem.edit(doc.domainId, pid, { hidden: false }));
             }
-        } else if (op === 'unlock') tasks.push(contest.recalcStatus(doc.domainId, doc.tid));
+        }
     }
     await Promise.all(tasks);
 });
@@ -231,22 +231,16 @@ export class ContestBroadcastHandler extends ContestDetailBaseHandler {
 export class ContestScoreboardHandler extends ContestDetailBaseHandler {
     @param('tid', Types.ObjectID)
     @param('ext', Types.Range(['csv', 'html']), true)
-    @param('ignoreLock', Types.Boolean, true)
-    async get(domainId: string, tid: ObjectID, ext = '', ignoreLock = false) {
-        if (ignoreLock && !this.user.own(this.tdoc)) {
-            this.checkPerm(this.tdoc.rule === 'homework'
-                ? PERM.PERM_VIEW_HOMEWORK_HIDDEN_SCOREBOARD
-                : PERM.PERM_VIEW_CONTEST_HIDDEN_SCOREBOARD);
-        }
+    async get(domainId: string, tid: ObjectID, ext = '') {
         if (ext) {
-            await this.exportScoreboard(domainId, tid, ext, ignoreLock);
+            await this.exportScoreboard(domainId, tid, ext);
             return;
         }
         const pdict = await problem.getList(domainId, this.tdoc.pids, true, undefined, false, [
             // Problem statistics display is allowed as we can view submission info in scoreboard.
             ...problem.PROJECTION_CONTEST_LIST, 'nSubmit', 'nAccept',
         ]);
-        const [, rows, udict] = await contest.getScoreboard.call(this, domainId, tid, false, ignoreLock);
+        const [, rows, udict] = await contest.getScoreboard.call(this, domainId, tid, false);
         this.response.template = 'contest_scoreboard.html';
         // eslint-disable-next-line @typescript-eslint/naming-convention
         const page_name = this.tdoc.rule === 'homework'
@@ -257,15 +251,23 @@ export class ContestScoreboardHandler extends ContestDetailBaseHandler {
         };
     }
 
-    async exportScoreboard(domainId: string, tid: ObjectID, ext: string, ignoreLock: boolean) {
+    async exportScoreboard(domainId: string, tid: ObjectID, ext: string) {
         await this.limitRate('scoreboard_download', 120, 3);
         const getContent = {
             csv: async (rows) => `\uFEFF${rows.map((c) => (c.map((i) => i.value?.toString().replace(/\n/g, ' ')).join(','))).join('\n')}`,
             html: (rows, tdoc) => this.renderHTML('contest_scoreboard_download_html.html', { rows, tdoc }),
         };
-        const [, rows] = await contest.getScoreboard.call(this, domainId, tid, true, ignoreLock);
+        const [, rows] = await contest.getScoreboard.call(this, domainId, tid, true);
         this.binary(await getContent[ext](rows, this.tdoc), `${this.tdoc.title}.${ext}`);
     }
+
+    @param('tid', Types.ObjectID)
+    async postUnlock(domainId: string, tid: ObjectID) {
+        if (!this.user.own(this.tdoc)) this.checkPerm(PERM.PERM_EDIT_CONTEST);
+        if (!contest.isDone(this.tdoc)) throw new ContestNotEndedError(domainId, tid);
+        await contest.unlockScoreboard(domainId, tid);
+        this.back();
+    }
 }
 
 export class ContestEditHandler extends Handler {
@@ -355,7 +357,6 @@ export class ContestEditHandler extends Handler {
             await Promise.all(pids.map((pid) => problem.edit(domainId, pid, { hidden: true })));
             operation.push('unhide');
         }
-        if (lock && lockAt <= endAt) operation.push('unlock');
         if (operation.length) {
             await ScheduleModel.add({
                 ...task,
diff --git a/packages/hydrooj/src/handler/problem.ts b/packages/hydrooj/src/handler/problem.ts
index c5bb7f66..aaedcdb4 100644
--- a/packages/hydrooj/src/handler/problem.ts
+++ b/packages/hydrooj/src/handler/problem.ts
@@ -328,13 +328,12 @@ export class ProblemDetailHandler extends ContestDetailBaseHandler {
             if (!this.tdoc?.pids?.includes(this.pdoc.docId)) throw new ContestNotFoundError(domainId, tid);
             if (contest.isNotStarted(this.tdoc)) throw new ContestNotLiveError(tid);
             if (!contest.isDone(this.tdoc, this.tsdoc) && (!this.tsdoc?.attend || !this.tsdoc.startAt)) throw new ContestNotAttendedError(tid);
+            // Delete problem-related info in contest mode
             this.pdoc.tag.length = 0;
-            if (!contest.canShowScoreboard.call(this, this.tdoc) || !contest.isLocked(this.tdoc)) {
-                delete this.pdoc.nAccept;
-                delete this.pdoc.nSubmit;
-                delete this.pdoc.difficulty;
-                delete this.pdoc.stats;
-            }
+            delete this.pdoc.nAccept;
+            delete this.pdoc.nSubmit;
+            delete this.pdoc.difficulty;
+            delete this.pdoc.stats;
         } else if (!problem.canViewBy(this.pdoc, this.user)) {
             throw new PermissionError(PERM.PERM_VIEW_PROBLEM_HIDDEN);
         }
diff --git a/packages/hydrooj/src/interface.ts b/packages/hydrooj/src/interface.ts
index 577b976d..6a3ead8e 100644
--- a/packages/hydrooj/src/interface.ts
+++ b/packages/hydrooj/src/interface.ts
@@ -352,9 +352,12 @@ export interface Tdoc<docType = document['TYPE_CONTEST'] | document['TYPE_TRAINI
     assign?: string[];
     files?: FileInfo[];
     allowViewCode?: boolean;
+    nSubmit?: Record<number, number>;
+    nAccept?: Record<number, number>;
 
     // For contest
     lockAt?: Date;
+    unlocked?: boolean;
     /**
      * In hours
      * 在比赛有效时间内选择特定的 X 小时参加比赛（从首次打开比赛算起）
@@ -494,7 +497,7 @@ export interface ContestRule<T = any> {
     showScoreboard: (tdoc: Tdoc<30>, now: Date) => boolean;
     showSelfRecord: (tdoc: Tdoc<30>, now: Date) => boolean;
     showRecord: (tdoc: Tdoc<30>, now: Date) => boolean;
-    stat: (this: ContestRule<T>, tdoc: Tdoc<30>, journal: any[], ignoreLock?: boolean) => ContestStat & T;
+    stat: (this: ContestRule<T>, tdoc: Tdoc<30>, journal: any[]) => ContestStat & T;
     scoreboardHeader: (
         this: ContestRule<T>, isExport: boolean, _: (s: string) => string,
         tdoc: Tdoc<30>, pdict: ProblemDict,
diff --git a/packages/hydrooj/src/model/contest.ts b/packages/hydrooj/src/model/contest.ts
index 0845f7da..e3196f8e 100644
--- a/packages/hydrooj/src/model/contest.ts
+++ b/packages/hydrooj/src/model/contest.ts
@@ -2,20 +2,21 @@ import { sumBy } from 'lodash';
 import { FilterQuery, ObjectID } from 'mongodb';
 import { Counter, formatSeconds, Time } from '@hydrooj/utils/lib/utils';
 import {
-    ContestAlreadyAttendedError, ContestNotAttendedError, ContestNotFoundError,
+    ContestAlreadyAttendedError, ContestNotFoundError,
     ContestScoreboardHiddenError, ValidationError,
 } from '../error';
 import {
     ContestRule, ContestRules, ProblemDict,
-    ScoreboardNode, ScoreboardRow, Tdoc,
-    Udict,
+    ScoreboardNode, ScoreboardRow, Tdoc, Udict,
 } from '../interface';
 import ranked from '../lib/rank';
 import * as bus from '../service/bus';
 import type { Handler } from '../service/server';
+import { buildProjection } from '../utils';
 import { PERM, STATUS } from './builtin';
 import * as document from './document';
 import problem from './problem';
+import RecordModel from './record';
 import user from './user';
 
 interface AcmJournal {
@@ -46,12 +47,6 @@ function buildContestRule<T>(def: ContestRule<T>): ContestRule<T> {
     return def;
 }
 
-function filterEffective<T extends AcmJournal>(tdoc: Tdoc, journal: T[], ignoreLock = false): T[] {
-    // eslint-disable-next-line @typescript-eslint/no-use-before-define
-    if (isLocked(tdoc) && !ignoreLock) journal = journal.filter((i) => i.rid.generationTime * 1000 < tdoc.lockAt.getTime());
-    return journal.filter((i) => tdoc.pids.includes(i.pid));
-}
-
 const acm = buildContestRule({
     TEXT: 'ACM/ICPC',
     check: () => { },
@@ -60,13 +55,13 @@ const acm = buildContestRule({
     showScoreboard: (tdoc, now) => now > tdoc.beginAt,
     showSelfRecord: () => true,
     showRecord: (tdoc, now) => now > tdoc.endAt,
-    stat(tdoc, journal: AcmJournal[], ignoreLock = false) {
+    stat(tdoc, journal: AcmJournal[]) {
         const naccept = Counter<number>();
         const effective: Record<number, AcmJournal> = {};
         const detail: Record<number, AcmDetail> = {};
         let accept = 0;
         let time = 0;
-        for (const j of filterEffective(tdoc, journal, ignoreLock)) {
+        for (const j of journal) {
             if (!this.submitAfterAccept && effective[j.pid]?.status === STATUS.STATUS_ACCEPTED) continue;
             effective[j.pid] = j;
             if (![STATUS.STATUS_ACCEPTED, STATUS.STATUS_COMPILE_ERROR, STATUS.STATUS_FORMAT_ERROR].includes(j.status)) {
@@ -545,26 +540,26 @@ export async function getStatus(domainId: string, tid: ObjectID, uid: number) {
         get(domainId, tid),
         document.getStatus(domainId, document.TYPE_CONTEST, tid, uid),
     ]);
-    // eslint-disable-next-line @typescript-eslint/no-use-before-define
-    if (status && isLocked(tdoc)) Object.assign(status, RULES[tdoc.rule].stat(tdoc, status.journal || [], true));
     return status;
 }
 
-export async function updateStatus(
-    domainId: string, tid: ObjectID, uid: number, rid: ObjectID, pid: number,
-    status = STATUS.STATUS_WRONG_ANSWER, score = 0,
-) {
-    const [tdoc, otsdoc] = await Promise.all([
-        get(domainId, tid),
-        getStatus(domainId, tid, uid),
-    ]);
-    if (!otsdoc.attend) throw new ContestNotAttendedError(tid, uid);
-    const tsdoc = await document.revPushStatus(domainId, document.TYPE_CONTEST, tid, uid, 'journal', {
+async function _updateStatus(tdoc: Tdoc<30>, uid: number, rid: ObjectID, pid: number, status: STATUS, score: number) {
+    // eslint-disable-next-line @typescript-eslint/no-use-before-define
+    if (isLocked(tdoc)) status = STATUS.STATUS_WAITING;
+    const tsdoc = await document.revPushStatus(tdoc.domainId, document.TYPE_CONTEST, tdoc.docId, uid, 'journal', {
         rid, pid, status, score,
     }, 'rid');
     const journal = _getStatusJournal(tsdoc);
     const stats = RULES[tdoc.rule].stat(tdoc, journal);
-    return await document.revSetStatus(domainId, document.TYPE_CONTEST, tid, uid, tsdoc.rev, { journal, ...stats });
+    return await document.revSetStatus(tdoc.domainId, document.TYPE_CONTEST, tdoc.docId, uid, tsdoc.rev, { journal, ...stats });
+}
+
+export async function updateStatus(
+    domainId: string, tid: ObjectID, uid: number, rid: ObjectID, pid: number,
+    status = STATUS.STATUS_WRONG_ANSWER, score = 0,
+) {
+    const tdoc = await get(domainId, tid);
+    return await _updateStatus(tdoc, uid, rid, pid, status, score);
 }
 
 export async function getListStatus(domainId: string, uid: number, tids: ObjectID[]) {
@@ -670,6 +665,15 @@ export async function recalcStatus(domainId: string, tid: ObjectID) {
     return await Promise.all(tasks);
 }
 
+export async function unlockScoreboard(domainId: string, tid: ObjectID) {
+    const tdoc = await document.get(domainId, document.TYPE_CONTEST, tid);
+    if (!tdoc.lockAt || tdoc.unlocked) return;
+    const rdocs = await RecordModel.getMulti(domainId, { tid, _id: { $gte: Time.getObjectID(tdoc.lockAt) } })
+        .project(buildProjection(['_id', 'uid', 'pid', 'status', 'score'])).toArray();
+    await Promise.all(rdocs.map((rdoc) => _updateStatus(tdoc, rdoc.uid, rdoc._id, rdoc.pid, rdoc.status, rdoc.score)));
+    await edit(domainId, tid, { unlocked: true });
+}
+
 export function canViewHiddenScoreboard() {
     return this.user.hasPerm(PERM.PERM_VIEW_CONTEST_HIDDEN_SCOREBOARD);
 }
@@ -693,12 +697,10 @@ export function canShowScoreboard(tdoc: Tdoc<30>, allowPermOverride = true) {
 }
 
 export async function getScoreboard(
-    this: Handler, domainId: string, tid: ObjectID,
-    isExport = false, ignoreLock = false,
+    this: Handler, domainId: string, tid: ObjectID, isExport = false,
 ): Promise<[Tdoc<30>, ScoreboardRow[], Udict, ProblemDict]> {
     const tdoc = await get(domainId, tid);
     if (!canShowScoreboard.call(this, tdoc)) throw new ContestScoreboardHiddenError(tid);
-    if (ignoreLock) delete tdoc.lockAt;
     const tsdocsCursor = getMultiStatus(domainId, { docId: tid }).sort(RULES[tdoc.rule].statusSort);
     const pdict = await problem.getList(domainId, tdoc.pids, true);
     const [rows, udict] = await RULES[tdoc.rule].scoreboard(
@@ -735,6 +737,7 @@ global.Hydro.model.contest = {
     setStatus,
     getAndListStatus,
     recalcStatus,
+    unlockScoreboard,
     canShowRecord,
     canShowSelfRecord,
     canShowScoreboard,
diff --git a/packages/ui-default/templates/contest_scoreboard.html b/packages/ui-default/templates/contest_scoreboard.html
index ea77baf1..9dc79707 100644
--- a/packages/ui-default/templates/contest_scoreboard.html
+++ b/packages/ui-default/templates/contest_scoreboard.html
@@ -12,6 +12,14 @@
       <a class="button" href="{{ url(type + '_scoreboard_download', tid=tdoc.docId, ext='csv') }}">
         <span class="icon icon-download"></span> {{ _('Export as CSV') }}
       </a>
+      {% if model.contest.isEnded(tdoc) and tdoc.lockAt and handler.user.own(tdoc) and not tdoc.unlocked %}
+        <form method="POST">
+          <input type="hidden" name="operation" value="unlock">
+          <button type="submit" class="button" href="{{ url(type + '_scoreboard_download', tid=tdoc.docId, ext='csv') }}">
+            <span class="icon icon-feeling-lucky"></span> {{ _('Unlock scoreboard') }}
+          </button>
+        </form>
+      {% endif %}
     </div>
     {% if model.contest.isLocked(tdoc) %}
       <div class="section__body no-padding">
@@ -19,6 +27,12 @@
           {{ _('Scoreboard locked at {0}').format(datetimeSpan(tdoc.lockAt))|safe }}
         </blockquote>
       </div>
+    {% elif model.contest.isEnded(tdoc) and tdoc.lockAt and not tdoc.unlocked %}
+      <div class="section__body no-padding">
+        <blockquote class="note">
+          {{ _('Please wait until contest host unlock the scoreboard.') }}
+        </blockquote>
+      </div>
     {% endif %}
     <div class="section__body no-padding overflow-hidden-horizontal">
       <table class="data-table">