diff --git a/bigstuff.cpp b/bigstuff.cpp
index ed947676..415cbeec 100644
--- a/bigstuff.cpp
+++ b/bigstuff.cpp
@@ -1516,4 +1516,15 @@ void moreBigStuff(cell *c) {
     }      
   }
 
+void generate_mines() {
+  vector<cell*> candidates;
+  for(cell *c: currentmap->allcells())
+    if(c->wall == waMineUnknown) 
+      candidates.push_back(c);
+  bounded_mine_max = isize(candidates);
+  hrandom_shuffle(&candidates[0], bounded_mine_max);
+  bounded_mine_quantity = int(bounded_mine_max * bounded_mine_percentage + 0.5);
+  for(int i=0; i<bounded_mine_quantity; i++) candidates[i]->wall = waMineMine;
+  }
+
 }
diff --git a/config.cpp b/config.cpp
index 0cedf55c..f4a14bff 100644
--- a/config.cpp
+++ b/config.cpp
@@ -4,6 +4,9 @@
 
 namespace hr {
 
+ld bounded_mine_percentage = 0.1;
+int bounded_mine_quantity, bounded_mine_max;
+
 const char *conffile = "hyperrogue.ini";
 
 array<ld, gGUARD> sightranges;
@@ -409,6 +412,8 @@ void initConfig() {
   addsaver(racing::standard_centering, "race_standard_centering");
 #endif
 
+  addsaver(bounded_mine_percentage, "bounded_mine_percentage");
+
 #if CAP_SHMUP  
   shmup::initConfig();
 #endif
diff --git a/game.cpp b/game.cpp
index b22c9bfd..6c30e4d9 100644
--- a/game.cpp
+++ b/game.cpp
@@ -3515,6 +3515,7 @@ void gainShard(cell *c2, const char *msg) {
 
 void uncoverMinesFull(cell *c2) {
   int mineradius = 
+    bounded ? 3 :
     (items[itBombEgg] < 1 && !tactic::on) ? 0 :
     items[itBombEgg] < 20 ? 1 :
     items[itBombEgg] < 30 ? 2 :
diff --git a/geom-exp.cpp b/geom-exp.cpp
index df5d86a7..f3313404 100644
--- a/geom-exp.cpp
+++ b/geom-exp.cpp
@@ -676,6 +676,24 @@ void showEuclideanMenu() {
   
   dialog::addSelItem(XLAT("land"), XLAT1(linf[specialland].name), 'l');
   dialog::add_action_push(ge_land_selection);
+  
+  if(specialland == laMinefield && bounded) {
+    dialog::addSelItem(XLAT("number of mines"), its(bounded_mine_quantity), 'm');
+    dialog::add_action([] {
+      dialog::editNumber(bounded_mine_quantity, 0, bounded_mine_max, (bounded_mine_max+5)/10, 1, 
+        XLAT("number of mines"), "");
+      dialog::reaction = [] {
+        if(bounded_mine_quantity < 0) bounded_mine_quantity = 0;
+        if(bounded_mine_quantity > bounded_mine_max) bounded_mine_quantity = bounded_mine_max;
+        };
+      dialog::reaction_final = [] {
+        bounded_mine_percentage = bounded_mine_quantity * 1. / bounded_mine_max;
+        stop_game();
+        start_game();
+        };
+      });
+    }
+  
   dialog::addBoolItem(XLAT("pattern"), specialland == laCanvas, 'p');
   if(specialland == laCanvas) dialog::lastItem().value = patterns::whichCanvas;
   dialog::add_action_push(patterns::showPrePattern);
diff --git a/hyper.h b/hyper.h
index 0f301718..ef87acef 100644
--- a/hyper.h
+++ b/hyper.h
@@ -1663,6 +1663,10 @@ extern bool timerstopped;
 bool againstRose(cell *cfrom, cell *cto);
 bool withRose(cell *cfrom, cell *cto);
 
+extern ld bounded_mine_percentage;
+extern int bounded_mine_quantity, bounded_mine_max;
+void generate_mines();
+
 // loops
 
 #define fakecellloop(ct) for(cell *ct = (cell*)1; ct; ct=NULL)
diff --git a/landgen.cpp b/landgen.cpp
index 05db6518..7d62fa51 100644
--- a/landgen.cpp
+++ b/landgen.cpp
@@ -1954,7 +1954,8 @@ void giantLandSwitch(cell *c, int d, cell *from) {
       break;
 
     case laMinefield:  
-      if(d == 7) {
+      if(d == 7 && bounded) c->wall = waMineUnknown;
+      else if(d == 7) {
         c->wall = waMineUnknown;
         // 250: rare mines
         // 1250: at 25
@@ -1985,7 +1986,7 @@ void giantLandSwitch(cell *c, int d, cell *from) {
           c->monst = moBomberbird;
         else placeLocalSpecial(c, 500);
         }
-      if(d == 3 && safety && (c->wall == waMineMine || c->wall == waMineUnknown))
+      if(d == 3 && safety && (c->wall == waMineMine || c->wall == waMineUnknown) && !bounded)
         c->wall = waMineOpen;
       break;
     
diff --git a/monstergen.cpp b/monstergen.cpp
index 77485a9c..665dc203 100644
--- a/monstergen.cpp
+++ b/monstergen.cpp
@@ -304,6 +304,13 @@ eItem wanderingTreasure(cell *c) {
   }
 
 void wandering() {
+  if(bounded && specialland == laMinefield) {
+    kills[moBomberbird] = 0;
+    kills[moTameBomberbird] = 0;
+    for(cell *c: currentmap->allcells()) if(c->wall == waMineUnknown) kills[moBomberbird]++;
+    for(cell *c: currentmap->allcells()) if(among(c->wall, waMineMine, waMineUnknown) && mineMarked(c)) kills[moTameBomberbird]++;
+    return;
+    }
   if(!canmove) return;
   if(!gen_wandering) return;
   if(racing::on) return;
diff --git a/system.cpp b/system.cpp
index aa32da59..729fb676 100644
--- a/system.cpp
+++ b/system.cpp
@@ -270,6 +270,9 @@ void initgame() {
       makeEmpty(cwt.at);
     }
   
+  if(specialland == laMinefield && bounded)
+    generate_mines();
+  
   princess::squeaked = false;
   clearing::current_root = NULL;