Complete Bejeweled game in less than 2KB

December 16, 2010 • Actionscript 3, Flash, Game design by Emanuele Feronato • 31 Comments

You should know Bejeweled from PopCap Games.

It’s a game which have been played millions, if not billions, of times. Now PopCap just released the 3rd version of his blockbuster.

To celebrate this event, just like I made when I coded a complete Flash Sokoban game in less than 2KB, I made a Bejeweled version in less than 2KB. The swf file is 2035 bytes, less than the 2048 need to make 2KB.

Do you think it does not have any feature? Take a look:

* colorful representation of all 7 kinds of jewel
* select a jewel clicking on it
* swap jewels only if they make a chain
* combo chains recognizing
* falling jewels animation
* complex (let’s say “not that basic”) score system
* hint on a possible move when clicking outside the game area

Everything in less than 2KB. The code was mode with the only purpose of making the game fit in less than 2KB, there’s not readability nor optimization.

Here it is the source:

package {
	import flash.display.Sprite;
	import flash.events.MouseEvent;
	import flash.events.Event;
	import flash.text.TextField;
	public class n extends Sprite {
		private var jw:Array=new Array();
		private var g:Sprite;
		private var s:Sprite=new Sprite();
		private var pr:int=-10;
		private var pc:int=-10;
		private var cl:Array=new Array(0xFF0000,0xFF00,0xFF,0XFFFF00,0xFF00FF,0xFFFF,0xFFFFFF);
		private var cp:Boolean=false;
		private var ts:TextField=new TextField();
		private var th:TextField=new TextField();
		private var sc:uint=0;
		private var m:uint=0;
		public function n() {
			addChild(ts);
			ts.textColor=0xFFFFFF;
			ts.x=500;
			addChild(th);
			th.textColor=0xFFFFFF;
			th.x=550;
			for (var i:uint=0; i<8; i++) {
				jw[i]=new Array();
				for (var j:uint=0; j<8; j++) {
					do {
						jw[i][j]=Math.floor(Math.random()*7);
					} while (rk(i,j)>2||ck(i,j)>2);
					g=new Sprite();
					g.graphics.beginFill(cl[jw[i][j]]);
					g.graphics.drawCircle(30,30,29);
					g.graphics.endFill();
					g.name=i+"_"+j;
					g.x=j*60;
					g.y=i*60;
					addChild(g);
				}
			}
			addChild(s);
			s.graphics.lineStyle(2,0xff0000,1);
			s.graphics.drawRect(0,0,60,60);
			s.visible=false;
			stage.addEventListener(MouseEvent.CLICK,ci);
			addEventListener(Event.ENTER_FRAME,ef);
		}
		private function ef(e:Event):void {
			var f:Boolean=false;
			for (var i:int=6; i>=0; i--) {
				for (var j:uint=0; j<8; j++) {
					if (jw[i][j]!=-1&&jw[i+1][j]==-1) {
						f=true;
						jw[i+1][j]=jw[i][j];
						jw[i][j]=-1;
						getChildByName(i+"_"+j).y+=60;
						getChildByName(i+"_"+j).name=(i+1)+"_"+j;
						break;
					}
				}
				if (f) {
					break;
				}
			}
			if (! f) {
				var h:Boolean=false;
				for (i=7; i>=0; i--) {
					for (j=0; j<8; j++) {
						if (jw[i][j]==-1) {
							h=true;
							jw[0][j]=Math.floor(Math.random()*7);
							g=new Sprite();
							g.graphics.beginFill(cl[jw[0][j]]);
							g.graphics.drawCircle(30,30,29);
							g.graphics.endFill();
							g.name="0_"+j;
							g.x=j*60;
							g.y=0;
							addChild(g);
							break;
						}
					}
					if (h) {
						break;
					}
				}
				if (! h) {
					var r:Boolean=false;
					for (i=7; i>=0; i--) {
						for (j=0; j<8; j++) {
							if (rk(i,j)>2||ck(i,j)>2) {
								r=true;
								var tr:Array=[i+"_"+j];
								var u:uint=jw[i][j];
								var t:int;
								if (rk(i,j)>2) {
									t=j;
									while (chk(u,i,t-1)) {
										t--;
										tr.push(i+"_"+t);
									}
									t=j;
									while (chk(u,i,t+1)) {
										t++;
										tr.push(i+"_"+t);
									}
								}
								if (ck(i,j)>2) {
									t=i;
									while (chk(u,t-1,j)) {
										t--;
										tr.push(t+"_"+j);
									}
									t=i;
									while (chk(u,t+1,j)) {
										t++;
										tr.push(t+"_"+j);
									}
								}
								for (i=0; i<tr.length; i++) {
									removeChild(getChildByName(tr[i]));
									var cd:Array=tr[i].split("_");
									jw[cd[0]][cd[1]]=-1;
									sc+=m;
									m++;
								}
								break;
							}
						}
						if (r) {
							break;
						}
					}
					if (! r) {
						cp=true;
						m=0;
					}
				}
			}
			ts.text=sc.toString();
		}
		private function ci(e:MouseEvent):void {
			if (cp) {
				if (mouseX<480&&mouseX>0&&mouseY<480&&mouseY>0) {
					var sr:uint=Math.floor(mouseY/60);
					var sc:uint=Math.floor(mouseX/60);
					if (!(((sr==pr+1||sr==pr-1)&&sc==pc)||((sc==pc+1||sc==pc-1)&&sr==pr))) {
						pr=sr;
						pc=sc;
						s.x=60*pc;
						s.y=60*pr;
						s.visible=true;
					} else {
						swp(pr,pc,sr,sc);
						if (rk(pr,pc)>2||ck(pr,pc)>2||rk(sr,sc)>2||ck(sr,sc)>2) {
							th.text="";
							cp=false;
							getChildByName(pr+"_"+pc).x=sc*60;
							getChildByName(pr+"_"+pc).y=sr*60;
							getChildByName(pr+"_"+pc).name="t";
							getChildByName(sr+"_"+sc).x=pc*60;
							getChildByName(sr+"_"+sc).y=pr*60;
							getChildByName(sr+"_"+sc).name=pr+"_"+pc;
							getChildByName("t").name=sr+"_"+sc;
						} else {
							swp(pr,pc,sr,sc);
						}
						pr=-10;
						pc=-10;
						s.visible=false;
					}
				} else {
					for (var i:uint=0; i<8; i++) {
						for (var j:uint=0; j<8; j++) {
							if (i<7) {
								swp(i,j,i+1,j);
								if ((rk(i,j)>2||ck(i,j)>2||rk(i+1,j)>2||ck(i+1,j)>2)) {
									th.text = i.toString()+","+j.toString()+"->"+(i+1).toString()+","+j.toString();
								}
								swp(i,j,i+1,j);
							}
							if (j<7) {
								swp(i,j,i,j+1);
								if ((rk(i,j)>2||ck(i,j)>2||rk(i,j+1)>2||ck(i,j+1)>2) ) {
									th.text = i.toString()+","+j.toString()+"->"+(i).toString()+","+(j+1).toString();
								}
								swp(i,j,i,j+1);
							}
						}
					}
				}
			}
		}
 
		private function swp(r1:uint,c1:uint,r2:uint,c2:uint):void {
			var t:uint=jw[r1][c1];
			jw[r1][c1]=jw[r2][c2];
			jw[r2][c2]=t;
		}
		private function rk(r:uint,c:uint):uint {
			var u:uint=jw[r][c];
			var stk:uint=1;
			var t:int=c;
			while (chk(u,r,t-1)) {
				t--;
				stk++;
			}
			t=c;
			while (chk(u,r,t+1)) {
				t++;
				stk++;
			}
			return (stk);
		}
		private function ck(r:uint,c:uint):uint {
			var u:uint=jw[r][c];
			var stk:uint=1;
			var t:int=r;
			while (chk(u,t-1,c)) {
				t--;
				stk++;
			}
			t=r;
			while (chk(u,t+1,c)) {
				t++;
				stk++;
			}
			return (stk);
		}
		private function chk(g:uint,r:int,c:int):Boolean {
			if (jw[r]==null) {
				return false;
			}
			if (jw[r][c]==null) {
				return false;
			}
			return g==jw[r][c];
		}
	}
}

This class was compiled with “Compress movie” checked and “Include XMP metadata” unchecked. There’s still room to save some bytes, but not enough to develop power jewels I am afraid… anyway you are free to try to reduce the code some more.

Download the source code. What’s your best score?

Rate this post: 1 Star

(28 votes, average: 4.46 out of 5)

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This post has 31 comments

Thomas

on December 16, 2010 at 3:04 am

550, there’s an entry score for people to beat.
I’d do better if it were on timed mode, where you can’t have an impossible board. See, my 550 might not be good, but you can bet it was fast ;)
Davide

on December 16, 2010 at 7:55 am

I think I found a missing thing :)
If you make a double combination (3 horizontal and 3 vertical) it considers only one.

Impressive anyway! Oh and my best score actually is only 328 :(
jarofed

on December 16, 2010 at 3:28 pm

1070
and have quite a little combinations to continue. Just have no time for it
Emanuele Feronato

on December 16, 2010 at 3:36 pm

wow, it would be interesting to see the source code… it could be a 1kb game or a 2kb game featuring power jewels
R!ch!3

on December 16, 2010 at 5:19 pm

I think he means that he reached 1070 points.

Really great work as always btw. :)
Emanuele Feronato

on December 16, 2010 at 5:43 pm

I hope you’re right, otherwise my code would suck… from 2035 to 1070 bytes… :(
theDude

on December 16, 2010 at 7:48 pm

2031 and very bored. Kudos on the coding though!
zandy

on December 16, 2010 at 8:50 pm

Muy bueno el ejemplo! :-) gracias por compartir.
kutay gursoy

on December 16, 2010 at 9:32 pm

well i dont know if it is a “bug” but when i play that kind of games the game clears both lines like the example matrix i ll give below.this game just clears if the line is 4 or more.

xyza
axzy
zzzx
xazy

as u see above there is a 4 “z” and a 3 “z” line. but game just clears 4 “z” and then left a 2″z” line.

btw:plz have a look at your e mail some newbies may need help:)
kutay gursoy

on December 16, 2010 at 9:54 pm

well i guess its second bug :S sample matrix is;

bcbcbc
yzxxaa
zxxaay

if i change 2nd line 4th colomn “x” with 3rd line 4th colomn “a” that would be

bcbcbc
yzxaaa
zxxxay

but game calculates just “xxx” line and doesnt calculate “aaa” line.after clearing “xxx” new matrix is like;

ydyzdc
ycbcaa
zzxaay

actually both lines should be cleared and that must be a “combo” :)
Damian Orlandi

on December 17, 2010 at 4:04 pm

If you make an “L” of the same colour, it will only take a line, not the whole L.
mc

on December 19, 2010 at 4:19 am

Now it would be nice to see the commented version :)
Angell

on December 19, 2010 at 10:14 pm

1622 – i thought it was endless
I’d just like to say that I’m just taking my babysteps in flash and I find your site really helpful, it’s in speed dial in my Opera :D.
shaman4d

on December 21, 2010 at 7:34 pm

Interesting but where is smooth animation of drop downing pieces? And hypercube and flame crystal?
cs

on December 25, 2010 at 9:34 am

I keep getting this message: Scene 1, Layer ‘Layer 1′, Frame 1, Line 1 1037: Packages cannot be nested.
Do anyone knows that can be fixed?
cs

on December 25, 2010 at 9:48 am

Never mind, I got it. That is some great work. Thanks a lot! 5/5
Nameless

on January 3, 2011 at 11:55 pm

For the past year, I’ve been struggling to advance my studies into flash and AS3 but couldn’t come up with a project that uses more complex method. I’ve always been hesitant into starting array-based games, but thanks to this tutorial I feel more conformable about it. It took a a few hours for me to decipher the code (mainly the method for adding new jewels once the player create chains), but now I am having a much better understanding of the game’s functionality and array-based games.

Once I am finished with my concept of Bejeweled, I plan on exploring more possibilities with the knowledge I just learned.

Thanks again!
Az

on January 16, 2011 at 8:10 pm

First try, 736
Luis Epifanio

on February 12, 2011 at 12:46 am

Great. Quit at 606 point. Congrats
FuzzDog

on March 12, 2011 at 3:44 pm

It’s really hard to reduce the code when I can’t even understand it because the variables you have used are not descriptive at all.
Brook Jordan

on April 25, 2011 at 4:33 pm

Would it be out of line to post my version of the code, with properly named variables and comments for people to look at?

Obviously the swf now compiles bigger than yours, but I’m sure some people would appreciate seeing the code.
Emanuele Feronato

on April 27, 2011 at 8:49 am

@Jordan: it would be great, send your work at info[at]emanueleferonato.com
DutchBoy

on April 30, 2011 at 10:42 am

Very nice, but it have a bad, BAD B-A-D skin.
And you are so genious why don’t you make a better guestbook? This one sucks, really…
Simon Gleizes

on May 1, 2011 at 11:22 am

Final score: 1951.

The key is to play at the top of the board and to clear those pieces first, before going downwards.

Anyway, thanks a bunch for posting this Emanuele. I’m an avid reader of your blog and I found this script very nice!
Xtrude

on May 10, 2011 at 2:56 am

Question,
Has anyone tried to run this in Flash Builder? It comes up blank. What am I doing wrong?
B.Jordan

on July 6, 2011 at 9:23 am

Hi
@Xtrude:
You can run this code in all IDE:
Adobe Flash (I tried CS5)
FlashDevelop (with Flash to Release)
Flex works too (a few things are different but you should know them or you would not understand the game code of course)

Perhabs there are some debug information/errors fired in Flash Builder??

I also have read the code from “Game Development by Example” to write my own Bejeweled Version. It works nice but there is much to do for getting a real commercial working game :)!

Have you tried secureSWF or something else to reduce your Code again Emanuele?

Have a nice day!
Bejeweled for Flash, in under 2KB « White Labs

on August 19, 2011 at 4:15 am

[...] impressive find demonstrates how to fit a game in under 2KB. As the author says: “The code was mode(sic) with [...]
Honey

on September 19, 2011 at 5:04 am

hello sir Emanuele.. what part in the source code will the circles fall after a match? i am creating a matching game wherein the tiles will fall after there is a match in the middle..you’re tutorial is very helpful..thank you so much sir! Godbless!:D
[Flash CS5] - Flash Spiel design - Flashforum

on September 23, 2011 at 5:17 pm

[...] das macht man ziemlich genau so: Complete Bejeweled game in less than 2KB – Emanuele Feronato mfg sx __________________ [...]
Supanida

on November 2, 2011 at 7:45 am

I got 3248!! It’s nice. I’m trying to do the same thing in html5/javascript. I got the game work so far but I want to add on some dropping animation which I don’t know how to do it yet.
The White Agency Blog » Bejeweled for Flash, in under 2KB » The White Agency Blog

on May 4, 2012 at 5:11 am

[...] impressive find demonstrates how to fit a game in under 2KB. The author says “The code was mode(sic) with the [...]

Emanuele Feronato

italian geek and PROgrammer

Complete Bejeweled game in less than 2KB

This post has 31 comments

Thomas

Davide

jarofed

Emanuele Feronato

R!ch!3

Emanuele Feronato

theDude

zandy

kutay gursoy

kutay gursoy

Damian Orlandi

mc

Angell

shaman4d

cs

cs

Nameless

Az

Luis Epifanio

FuzzDog

Brook Jordan

Emanuele Feronato

DutchBoy

Simon Gleizes

Xtrude

B.Jordan

Bejeweled for Flash, in under 2KB « White Labs

Honey

[Flash CS5] - Flash Spiel design - Flashforum

Supanida

The White Agency Blog » Bejeweled for Flash, in under 2KB » The White Agency Blog

Flash Game Development by Example

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