diff --git a/main.lua b/main.lua
index 569b9850..6a7b4c95 100644
--- a/main.lua
+++ b/main.lua
@@ -292,6 +292,14 @@ do
 		if RANKS.tsd_u then RANKS.tsd_u=0 end
 		needSave=true
 	end
+	if STAT.version==1600 then
+		RANKS.stack_20l=nil
+		RANKS.stack_40l=nil
+		RANKS.stack_100l=nil
+		fs.remove('record/stack_20l.rec')
+		fs.remove('record/stack_40l.rec')
+		fs.remove('record/stack_100l.rec')
+	end
 	if STAT.version~=VERSION.code then
 		STAT.version=VERSION.code
 		needSave=true
diff --git a/parts/modes/stack_100l.lua b/parts/modes/stack_100l.lua
index f15c60f4..441033a5 100644
--- a/parts/modes/stack_100l.lua
+++ b/parts/modes/stack_100l.lua
@@ -1,31 +1,41 @@
+local function getHoleCount(P)
+	local hole=0
+	for x=1,10 do
+		for y=1,98 do
+			if not P:solid(x,y)then
+				holes=holes+1
+			end
+		end
+	end
+	return hole
+end
 return{
 	color=COLOR.cyan,
 	env={
-		drop=60,lock=60,
+		drop=60,lock=120,
 		freshLimit=15,
 		fieldH=100,
 		highCam=true,
 		fillClear=false,
 		seqData={1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25},
-		sequence='bag',
-		bg='none',bgm='there',
+		bg='blockrain',bgm='there',
 	},
 	mesDisp=function(P)
 		setFont(60)
 		mStr(P.stat.piece,63,280)
 		mText(drawableText.piece,63,350)
 	end,
-	score=function(P)return{P.stat.piece,P.stat.time}end,
-	scoreDisp=function(D)return D[1].." Pieces".."   "..STRING.time(D[2])end,
-	comp=function(a,b)return a[1]>b[1]or a[1]==b[1]and a[2]<b[2]end,
+	score=function(P)return{getHoleCount(P),P.stat.time}end,
+	scoreDisp=function(D)return D[1].." Holes".."   "..STRING.time(D[2])end,
+	comp=function(a,b)return a[1]<b[1]or a[1]==b[1]and a[2]<b[2]end,
 	getRank=function(P)
-		local B=P.stat.piece
+		local H=getHoleCount(P)
 		return
-		B>=215 and 5 or
-		B>=208 and 4 or
-		B>=200 and 3 or
-		B>=190 and 2 or
-		B>=180 and 1 or
-		0
+		H<=2 and 5 or
+		H<=5 and 4 or
+		H<=10 and 3 or
+		H<=15 and 2 or
+		H<=20 and 1 or
+		H<=26 and 0
 	end,
 }
\ No newline at end of file
diff --git a/parts/modes/stack_20l.lua b/parts/modes/stack_20l.lua
index f4066d58..a6084a22 100644
--- a/parts/modes/stack_20l.lua
+++ b/parts/modes/stack_20l.lua
@@ -1,28 +1,41 @@
+local function getHoleCount(P)
+	local hole=0
+	for x=1,10 do
+		for y=1,20 do
+			if not P:solid(x,y)then
+				holes=holes+1
+			end
+		end
+	end
+	return hole
+end
 return{
 	color=COLOR.cyan,
 	env={
 		drop=60,lock=60,
 		freshLimit=15,
+		fieldH=20,
 		highCam=true,
 		fillClear=false,
-		bg='none',bgm='there',
+		seqData={1,2,3,4,5,6,7},
+		bg='blockrain',bgm='there',
 	},
 	mesDisp=function(P)
 		setFont(60)
 		mStr(P.stat.piece,63,280)
 		mText(drawableText.piece,63,350)
 	end,
-	score=function(P)return{P.stat.piece,P.stat.time}end,
-	scoreDisp=function(D)return D[1].." Pieces".."   "..STRING.time(D[2])end,
-	comp=function(a,b)return a[1]>b[1]or a[1]==b[1]and a[2]<b[2]end,
+	score=function(P)return{getHoleCount(P),P.stat.time}end,
+	scoreDisp=function(D)return D[1].." Holes".."   "..STRING.time(D[2])end,
+	comp=function(a,b)return a[1]<b[1]or a[1]==b[1]and a[2]<b[2]end,
 	getRank=function(P)
-		local B=P.stat.piece
+		local H=getHoleCount(P)
 		return
-		B>=55 and 5 or
-		B>=52 and 4 or
-		B>=49 and 3 or
-		B>=47 and 2 or
-		B>=44 and 1 or
-		0
+		H==0 and 5 or
+		H<=1 and 4 or
+		H<=2 and 3 or
+		H<=4 and 2 or
+		H<=7 and 1 or
+		H<=10 and 0
 	end,
 }
\ No newline at end of file
diff --git a/parts/modes/stack_40l.lua b/parts/modes/stack_40l.lua
index 02893d8e..0a7a1c05 100644
--- a/parts/modes/stack_40l.lua
+++ b/parts/modes/stack_40l.lua
@@ -1,30 +1,41 @@
+local function getHoleCount(P)
+	local hole=0
+	for x=1,10 do
+		for y=1,39 do
+			if not P:solid(x,y)then
+				holes=holes+1
+			end
+		end
+	end
+	return hole
+end
 return{
 	color=COLOR.cyan,
 	env={
-		drop=60,lock=60,
+		drop=60,lock=90,
 		freshLimit=15,
 		fieldH=40,
 		highCam=true,
 		fillClear=false,
 		seqData={1,2,3,4,5,6,7,1,2,3,4,5,6,7,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25},
-		bg='none',bgm='there',
+		bg='blockrain',bgm='there',
 	},
 	mesDisp=function(P)
 		setFont(60)
 		mStr(P.stat.piece,63,280)
 		mText(drawableText.piece,63,350)
 	end,
-	score=function(P)return{P.stat.piece,P.stat.time}end,
-	scoreDisp=function(D)return D[1].." Pieces".."   "..STRING.time(D[2])end,
-	comp=function(a,b)return a[1]>b[1]or a[1]==b[1]and a[2]<b[2]end,
+	score=function(P)return{getHoleCount(P),P.stat.time}end,
+	scoreDisp=function(D)return D[1].." Holes".."   "..STRING.time(D[2])end,
+	comp=function(a,b)return a[1]<b[1]or a[1]==b[1]and a[2]<b[2]end,
 	getRank=function(P)
-		local B=P.stat.piece
+		local H=getHoleCount(P)
 		return
-		B>=90 and 5 or
-		B>=87 and 4 or
-		B>=83 and 3 or
-		B>=78 and 2 or
-		B>=70 and 1 or
-		0
+		H==0 and 5 or
+		H<=1 and 4 or
+		H<=3 and 3 or
+		H<=6 and 2 or
+		H<=10 and 1 or
+		H<=20 and 0
 	end,
 }
\ No newline at end of file