diff --git a/src/ui/flutter_app/lib/engine/analyze.dart b/src/ui/flutter_app/lib/engine/analyze.dart
deleted file mode 100644
index 4f394ac3..00000000
--- a/src/ui/flutter_app/lib/engine/analyze.dart
+++ /dev/null
@@ -1,55 +0,0 @@
-/*
-  This file is part of Sanmill.
-  Copyright (C) 2019-2021 The Sanmill developers (see AUTHORS file)
-
-  Sanmill is free software: you can redistribute it and/or modify
-  it under the terms of the GNU General Public License as published by
-  the Free Software Foundation, either version 3 of the License, or
-  (at your option) any later version.
-
-  Sanmill is distributed in the hope that it will be useful,
-  but WITHOUT ANY WARRANTY; without even the implied warranty of
-  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-  GNU General Public License for more details.
-
-  You should have received a copy of the GNU General Public License
-  along with this program.  If not, see <http://www.gnu.org/licenses/>.
-*/
-
-class AnalyzeItem {
-  String move, moveName;
-  int score;
-  double winRate;
-
-  AnalyzeItem({this.move, this.score, this.winRate});
-
-  @override
-  String toString() {
-    return '{move: ${moveName ?? move}, score: $score, winRate: $winRate}';
-  }
-}
-
-class AnalyzeFetcher {
-  static List<AnalyzeItem> fetch(String response, {limit = 5}) {
-    final segments = response.split('|');
-
-    List<AnalyzeItem> result = [];
-
-    final regExp = RegExp(r'move:(.{4}).+score:(\-?\d+).+winRate:(\d+.?\d*)');
-
-    for (var segment in segments) {
-      final match = regExp.firstMatch(segment);
-
-      if (match == null) break;
-
-      final move = match.group(1);
-      final score = int.parse(match.group(2));
-      final winRate = double.parse(match.group(3));
-
-      result.add(AnalyzeItem(move: move, score: score, winRate: winRate));
-      if (result.length == limit) break;
-    }
-
-    return result;
-  }
-}
diff --git a/src/ui/flutter_app/lib/widgets/game_page.dart b/src/ui/flutter_app/lib/widgets/game_page.dart
index d0502878..31bd6a90 100644
--- a/src/ui/flutter_app/lib/widgets/game_page.dart
+++ b/src/ui/flutter_app/lib/widgets/game_page.dart
@@ -19,7 +19,6 @@
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:sanmill/common/config.dart';
-import 'package:sanmill/engine/analyze.dart';
 import 'package:sanmill/engine/engine.dart';
 import 'package:sanmill/engine/native_engine.dart';
 import 'package:sanmill/generated/l10n.dart';
@@ -283,37 +282,6 @@ class _GamePageState extends State<GamePage> with RouteAware {
     setState(() => _searching = true);
   }
 
-  showAnalyzeItems(
-    BuildContext context, {
-    String title,
-    List<AnalyzeItem> items,
-    Function(AnalyzeItem item) callback,
-  }) {
-    final List<Widget> children = [];
-
-    for (var item in items) {
-      children.add(
-        ListTile(
-          title: Text(item.moveName, style: TextStyle(fontSize: 18)),
-          subtitle: Text(S.of(context).winRate + ": ${item.winRate}%"),
-          trailing: Text(S.of(context).score + ": ${item.score}'"),
-          onTap: () => callback(item),
-        ),
-      );
-      children.add(Divider());
-    }
-
-    children.insert(0, SizedBox(height: 10));
-    children.add(SizedBox(height: 56));
-
-    showModalBottomSheet(
-      context: context,
-      builder: (BuildContext context) => SingleChildScrollView(
-        child: Column(mainAxisSize: MainAxisSize.min, children: children),
-      ),
-    );
-  }
-
   String getGameOverReasonString(GameOverReason reason, String winner) {
     String loseReasonStr;
     //String winnerStr =