diff --git a/README.md b/README.md
index 214e1c90..5770b73a 100644
--- a/README.md
+++ b/README.md
@@ -226,6 +226,7 @@ Check "Tool > Experimental > Reuse analysis" in the menu. This is expected to be
 * Support ownerships of stones by facial expressions.
 * Support `*.gib`, `*.ngf`, `*.ugf`, and `*.ugi` in addition to `*.sgf`. (You may need to do "npm install" again.)
 * Omit marks for too minor suggestions on the board.
+* Experimentally add "Tool > Experimental > Tsumego frame1&2" for solving life & death problems. (See "Tips" section in "Help" menu.)
 
 ### 0.4.0
 
diff --git a/src/help.html b/src/help.html
index 7d18ae33..ae870f44 100644
--- a/src/help.html
+++ b/src/help.html
@@ -221,6 +221,17 @@ <h3>Personal exercise book</h3>
 Push "stop match" button to exit from match mode.
 (Hit Tab or Z key after it if analysis are not shown.)
 
+<h3>Tsumego frame for solving life &amp; death problems (experimental)</h3>
+
+This feature is just an experiment. Do not expect much.
+
+<ol>
+ <li>Put stones of a problem. Use right-click to put same color stones.</li>
+ <li>Select "Tool > Experimental > Tsumego frame1" to fill rest areas.</li>
+ <li>Start analysis (space key) and watch suggestions.</li>
+</ol>
+There is also "Tsumego frame2", that tries to make the board more even.
+
 <!--
 <h3>Backward scan in auto-analysis</h3>
 
diff --git a/src/help_ja.html b/src/help_ja.html
index d41d4ce7..e27fef43 100644
--- a/src/help_ja.html
+++ b/src/help_ja.html
@@ -172,6 +172,17 @@ <h3>個人練習帳</h3>
 
 ［Tool］メニューの［練習問題として保存(Store as exercize)］で現在の盤面を記憶し、［練習問題(Exercize)］で記憶した盤面をランダムに表示することができます（訳注：記憶は「!」キー、出題は「?」キーでもできます）。対局モードを抜けるには［stop match］ボタンを押してください（そのあともし解析結果が表示されなければTabキーかZキーを押してください）。
 
+<h3>死活問題の解析：詰碁用フレーム (実験中)</h3>
+
+この機能は実験中です。多くを期待しないでください。
+
+<ol>
+ <li>問題図のとおりに石を置く。同じ色の石を続けて置くには右クリック。</li>
+ <li>"Tool > Experimental > Tsumego frame1"を選んで残りの領域を埋める。</li>
+ <li>スペースキーで解析を開始して推奨手を見る。</li>
+</ol>
+"Tsumego frame2"のほうは、盤面をより互角にしようと試みます。
+
 <!--
 <h3>Backward scan in auto-analysis</h3>
 
diff --git a/src/main.js b/src/main.js
index 69bbd661..0178ab72 100644
--- a/src/main.js
+++ b/src/main.js
@@ -594,6 +594,11 @@ function menu_template(win) {
             sep,
             item('Replay analysis', undefined,
                  (this_item, win) => ask_auto_redo_sec(win), true),
+            sep,
+            item("Tsumego frame1", 'Shift+f', () => add_tsumego_frame(),
+                 true, game.move_count > 0),
+            item("Tsumego frame2", 'CmdOrCtrl+Shift+f', () => add_tsumego_frame(true),
+                 true, game.move_count > 0),
         ]),
     ])
     const white_unloader_item =
@@ -616,10 +621,6 @@ function menu_template(win) {
         store_toggler_menu_item('Debug log', debug_log_key, null, toggle_debug_log),
         store_toggler_menu_item('Stone image', 'stone_image_p'),
         store_toggler_menu_item('Board image', 'board_image_p'),
-        item("Tsumego frame", 'Shift+f', () => add_tsumego_frame(),
-             true, game.move_count > 0),
-        item("Tsumego frame'", 'CmdOrCtrl+Shift+f', () => add_tsumego_frame(true),
-             true, game.move_count > 0),
         {role: 'toggleDevTools'},
     ])
     const help_menu = menu('Help', [