diff --git a/dat/bigrm-11.lua b/dat/bigrm-11.lua
new file mode 100644
index 000000000..7847868be
--- /dev/null
+++ b/dat/bigrm-11.lua
@@ -0,0 +1,36 @@
+
+-- Boulder "maze" with wide corridors
+
+function t_or_f() return percent(50) and true or false; end
+
+des.level_flags("mazelevel", "noflip");
+des.level_init({ style = "maze", corrwid = 3 + nh.rn2(3), wallthick = 1, deadends=t_or_f() });
+
+des.region(selection.area(00,00,75,18), "lit");
+des.non_diggable();
+
+function replace_wall_boulder(x,y)
+   des.terrain(x, y, ".");
+   des.object("boulder", x, y);
+end
+
+-- replace horizontal and vertical walls
+local sel = selection.match([[.w.]]) | selection.match(".\nw\n.");
+sel:iterate(replace_wall_boulder);
+-- replace the leftover corner walls
+local sel = selection.match([[.w.]]);
+sel:iterate(replace_wall_boulder);
+
+des.stair("up");
+des.stair("down");
+
+for i = 1,15 do
+   des.object();
+end
+for i = 1,6 do
+   des.trap("rolling boulder");
+end
+for i = 1,28 do
+  des.monster();
+end
+
diff --git a/dat/dungeon.lua b/dat/dungeon.lua
index bf4d4b9bf..ca9730ccb 100644
--- a/dat/dungeon.lua
+++ b/dat/dungeon.lua
@@ -66,7 +66,7 @@ dungeon = {
             base = 10,
             range = 3,
             chance = 40,
-            nlevels = 10
+            nlevels = 11
          },
          {
             name = "medusa",
diff --git a/doc/fixes37.0 b/doc/fixes37.0
index 0d4b3ece8..7393d29ba 100644
--- a/doc/fixes37.0
+++ b/doc/fixes37.0
@@ -1064,6 +1064,7 @@ menu for what-is command supports /^ and /" to view a list of nearby or whole
 	level visible and remembered traps
 spiders will occasionally spin webs when moving around
 drinking a burning potion of oil will cure being turned into slime
+new bigroom variant, a boulder maze
 
 
 Platform- and/or Interface-Specific New Features
diff --git a/sys/windows/vs/files.props b/sys/windows/vs/files.props
index 68c722288..4f21e681d 100644
--- a/sys/windows/vs/files.props
+++ b/sys/windows/vs/files.props
@@ -28,6 +28,7 @@
     <Luafiles Include = "bigrm-8.lua"/>
     <Luafiles Include = "bigrm-9.lua"/>
     <Luafiles Include = "bigrm-10.lua"/>
+    <Luafiles Include = "bigrm-11.lua"/>
     <Luafiles Include = "castle.lua"/>
     <Luafiles Include = "air.lua"/>
     <Luafiles Include = "astral.lua"/>