diff --git a/src-ui/res/history.en.yaml b/src-ui/res/history.en.yaml
index 3c51751f8..44500f1d6 100644
--- a/src-ui/res/history.en.yaml
+++ b/src-ui/res/history.en.yaml
@@ -231,3 +231,4 @@ cornerch: This genre first appeared in Puzzle Communication Nikoli vol. 191.
 marutaring: This genre first appeared in Puzzle Communication Nikoli vol. 181.
 bhaibahan: This genre was invented by Prasanna Seshadri.
 heavydots: This genre was invented by Prasanna Seshadri.
+tetroctb: This genre first appeared in Puzzle Communication Nikoli vol. 181.
diff --git a/src-ui/res/history.ja.yaml b/src-ui/res/history.ja.yaml
index c5b11150b..ad72c4ed4 100644
--- a/src-ui/res/history.ja.yaml
+++ b/src-ui/res/history.ja.yaml
@@ -231,3 +231,4 @@ cornerch: パズル通信ニコリ vol.191より
 marutaring: パズル通信ニコリ vol.181より
 bhaibahan: Prasanna Seshadri氏発案
 heavydots: Prasanna Seshadri氏発案
+tetroctb: パズル通信ニコリ vol.181より
diff --git a/src-ui/res/rules.en.yaml b/src-ui/res/rules.en.yaml
index 77845538f..3d69f9755 100644
--- a/src-ui/res/rules.en.yaml
+++ b/src-ui/res/rules.en.yaml
@@ -402,3 +402,16 @@ heavydots: |-
   3. A black dot touches exactly 3 lines, and a white dot touches exactly 4 lines.
   4. A regular grid point that's located next to a white/black dot cannot have more than 2 lines touching it.
   5. A block cannot contain a 2x2 square of cells.
+hasunomura: |-
+  Shade some cells on the board.
+  1. Cells with numbers cannot be shaded.
+  2. Clues indicate the sum of the areas of the unshaded regions using the (up to 4) cells diagonally adjacent to the clue. If a region uses multiple of these cells, it is only counted once. 
+  3. The shaded cells cannot form a 2x2 square.
+  4. All shaded cells form an orthogonally contiguous area.
+tetroctb: |-
+  Place several tetrominoes (blocks of 4 cells) in the grid.
+  1. Tetrominoes cannot be orthogonally adjacent.
+  2. Numbered regions must contain the indicated amount of shaded cells.
+  3. Each tetromino must cross at least one region border.
+  4. Two tetrominoes which touch each other at the corners must have different shapes, counting rotations and reflections as the same.
+  5. All tetrominoes form a diagonally contiguous area.