Write a program that plays the game

Battle Scripts lets you learn to code by writing autonomous players for classic games. Pick a game, learn the rules, then write a program that plays it. Forge it in the browser, test it instantly, and see how it stacks up against everyone else in the Arena.

How it works

Step 1

Choose a game

Tic-Tac-Toe or Hide and Sink. Read the rules and what your script has to decide.
Step 2

Build it in the Forge

Write Python or Java in the browser and run it against the Codecraft opponent as often as you like.
Step 3

Add it to your Armory

Freeze a version you're happy with. That snapshot is what other people challenge.
Step 4

Fight in the Arena

Battle other players' scripts, watch the game back turn by turn, and climb the leaderboard.

Available games

Tic-Tac-Toe

This classic game challenges you to create a script that can outsmart its opponent and achieve three in a row.

Read the rules

Hide and Sink

Based on the classic Battleship game, Hide and Sink requires strategic thinking and cunning to locate and sink your opponent's ships.

Read the rules

The Arena

Every active script anyone has entered. Pick an opponent, put one of yours up against it, and watch the game play out move by move.

Go to the Arena

Daily Tournament

Every day the top 100 of each leaderboard are drawn into a bracket and fought to a champion. No entry needed — if you're on the board, you're in it.

See the latest results

Leaderboard

All Time leaderboard
#	Script	Author	Pairing	Win rate
1	New Game	NICK, CADEN@1101 Kennedy	PythonTic-Tac-Toe	100% (2/2)
2	Smart?	Sam	JavaHide and Sink	100% (2/2)
3	TicTacToe-1	M Gibson	PythonTic-Tac-Toe	100% (1/1)
4	New Game	EssaHT	JavaTic-Tac-Toe	100% (1/1)
5	New Game	CRAWLEY, COLT@1101 Kennedy	PythonTic-Tac-Toe	100% (1/1)
6	New Game	Edwin Disang	PythonTic-Tac-Toe	100% (1/1)
7	Marta's Tic Tac Toe	Marta Deese	PythonTic-Tac-Toe	100% (1/1)
8	New Game	JULIANELLI, MIGUEL@1101 Kennedy	PythonTic-Tac-Toe	100% (1/1)
9	New Game	Edwin Disang	PythonTic-Tac-Toe	100% (1/1)
10	New Game	SALCEDOG	JavaTic-Tac-Toe	100% (3/3)
11	Bombastic Random Boats	Juan @ Codecraft Works	JavaHide and Sink	99% (171/173)
12	New Game	EssaHT	PythonTic-Tac-Toe	87% (13/15)
13	New Game	ICEVA	JavaTic-Tac-Toe	86% (6/7)
14	New Game	L&CIndustries	PythonTic-Tac-Toe	86% (6/7)
15	New Game	HudsonHT	PythonTic-Tac-Toe	82% (9/11)
16	New Game	TeddHT	PythonTic-Tac-Toe	80% (8/10)
17	New Game	DAWKINS, SKYLER@1101 Kennedy	PythonTic-Tac-Toe	75% (3/4)
18	CCPC Blocky 🥷🏾 1	Gilberto Creque	PythonTic-Tac-Toe	73% (194/264)
19	final2	BrittanyHT	PythonTic-Tac-Toe	72% (13/18)
20	New Game	TURNER, SABASTIAN@1101 Kennedy	PythonTic-Tac-Toe	67% (2/3)
21	New Game	Edwin Disang	PythonTic-Tac-Toe	67% (2/3)
22	New Game	DEMPSEY, EMRY@1101 Kennedy	JavaHide and Sink	67% (6/9)
23	New Game	Edwin Disang	PythonTic-Tac-Toe	67% (2/3)
24	New Game	BRISTOLA	JavaTic-Tac-Toe	67% (4/6)
25	New Game	CRAWLEY, COLT@1101 Kennedy	PythonTic-Tac-Toe	67% (2/3)
26	Glitch	MECKB	JavaTic-Tac-Toe	60% (3/5)
27	K.O.'s Player	Codecraft Works	PythonTic-Tac-Toe	60% (3/5)
28	Robsons Tic Tac to	CARVAJALR	JavaTic-Tac-Toe	60% (3/5)
29	Default Blocks but with Functions	Juan @ Codecraft Works	BlocklyTic-Tac-Toe	59% (323/552)
30	New Game	PRICE, MASON@1101 Kennedy	PythonTic-Tac-Toe	50% (1/2)
31	New Game	LEACH, MIKEL@1101 Kennedy	PythonTic-Tac-Toe	50% (2/4)
32	New Game	d j	PythonTic-Tac-Toe	50% (1/2)
33	New Game	RYAN, GAVIN@1101 Kennedy	PythonTic-Tac-Toe	50% (1/2)
34	New Game	KASPRZYK, RORY@1101 Kennedy	JavaHide and Sink	50% (3/6)
35	New Game	Edwin Disang	PythonTic-Tac-Toe	50% (1/2)
36	Gib TicTacToe	M Gibson	PythonTic-Tac-Toe	50% (2/4)
37	final	BrittanyHT	PythonTic-Tac-Toe	50% (1/2)
38	Alyssa	AlyssaHT	PythonTic-Tac-Toe	50% (1/2)
39	New Game	MECKB	JavaTic-Tac-Toe	50% (2/4)
40	THIS	AlyssaHT	PythonTic-Tac-Toe	50% (1/2)
41	New Game	Edwin Disang	PythonTic-Tac-Toe	43% (3/7)
42	Chaotic Random Toffees	Juan @ Codecraft Works	JavaTic-Tac-Toe	43% (3/7)
43	Aaden's Tic Tac Toe	BRISTOLA	JavaTic-Tac-Toe	42% (5/12)
44	BattleBot	Michelle Delahoussaye	BlocklyTic-Tac-Toe	41% (229/552)
45	New Game	PRICE, MASON@1101 Kennedy	PythonTic-Tac-Toe	33% (1/3)
46	New Game	COWELL, JAMAR@1101 Kennedy	JavaHide and Sink	33% (2/6)
47	New Game	BryanHT	PythonTic-Tac-Toe	33% (1/3)
48	New Game	AlyssaHT	PythonTic-Tac-Toe	33% (1/3)
49	marissa	LOPEZ ESTRADA, MARISSA@1101 Kennedy	PythonTic-Tac-Toe	27% (3/11)
50	Scary Random Snakes	Juan @ Codecraft Works	PythonTic-Tac-Toe	26% (65/248)
51	New Game	BryanHT	PythonTic-Tac-Toe	25% (1/4)
52	New Game	BryanHT	PythonTic-Tac-Toe	25% (2/8)
53	New Game	BryanHT	PythonTic-Tac-Toe	22% (2/9)
54	New Game	Aaron Leblanc	PythonTic-Tac-Toe	20% (1/5)
55	New Game	Tyler Campbell	JavaTic-Tac-Toe	17% (2/12)
56	New Game	JamesHT	PythonTic-Tac-Toe	14% (1/7)
57	New Game	LANDRUMS	JavaTic-Tac-Toe	— (0/0)
58	New Game	JULIANELLI, MIGUEL@1101 Kennedy	PythonTic-Tac-Toe	— (0/0)
59	cheese	JULIANELLI, MIGUEL@1101 Kennedy	PythonTic-Tac-Toe	— (0/0)
60	New Game	CRAWLEY, COLT@1101 Kennedy	PythonTic-Tac-Toe	— (0/0)
61	New Game	Koren Olson	PythonTic-Tac-Toe	— (0/0)
62	Final	MECKB	JavaTic-Tac-Toe	0% (0/1)
63	New Game	BELL, KA'SHAUN@1101 Kennedy	PythonTic-Tac-Toe	0% (0/1)
64	New Game	TURNER, SABASTIAN@1101 Kennedy	PythonTic-Tac-Toe	0% (0/1)
65	Shoot at 0, 0 <script>alert(1)</script>	Sam	JavaHide and Sink	0% (0/1)
66	New Game	AlyssaHT	PythonTic-Tac-Toe	— (0/0)
67	New Game	CRAWLEY, COLT@1101 Kennedy	PythonTic-Tac-Toe	— (0/0)
68	New Game	JULIANELLI, MIGUEL@1101 Kennedy	PythonTic-Tac-Toe	0% (0/2)
69	New Game	DEER, JT@1101 Kennedy	PythonTic-Tac-Toe	0% (0/2)
70	New Game	Koren Olson	PythonTic-Tac-Toe	— (0/0)
71	Smart?	Sam	JavaHide and Sink	— (0/0)
72	New Game	CRAWLEY, COLT@1101 Kennedy	PythonTic-Tac-Toe	— (0/0)
73	New Game	SHRIVASTAV, ARYAN@1101 Kennedy	PythonTic-Tac-Toe	0% (0/1)
74	New Game	TeddHT	PythonTic-Tac-Toe	0% (0/1)
75	New Game	PRICE, MASON@1101 Kennedy	PythonTic-Tac-Toe	— (0/0)
76	New Game	DAWKINS, SKYLER@1101 Kennedy	PythonTic-Tac-Toe	0% (0/5)
77	New Game	Sam	JavaHide and Sink	— (0/0)
78	An attempt 2	VARADY, SOPHIE@1101 Kennedy	PythonTic-Tac-Toe	— (0/0)
79	New Game	Gilberto Creque	JavaHide and Sink	0% (0/168)
80	New Game	AlyssaHT	PythonTic-Tac-Toe	— (0/0)
81	Smart? 2	Sam	JavaHide and Sink	0% (0/1)
82	New Game	d j	PythonTic-Tac-Toe	— (0/0)
83	New Game	BRADLEY, JASMIN@1101 Kennedy	JavaTic-Tac-Toe	— (0/0)
84	New Game	CAMPOS, LIAM@1101 Kennedy	PythonTic-Tac-Toe	— (0/0)
85	New Game	BRADLEY, JASMIN@1101 Kennedy	PythonTic-Tac-Toe	— (0/0)
86	New Game	SHRIVASTAV, ARYAN@1101 Kennedy	PythonTic-Tac-Toe	— (0/0)
87	New Game	JULIANELLI, MIGUEL@1101 Kennedy	PythonTic-Tac-Toe	0% (0/1)
88	New Game	BrittanyHT	PythonTic-Tac-Toe	0% (0/1)
89	New Game	CAMPOS, LIAM@1101 Kennedy	PythonTic-Tac-Toe	0% (0/3)
90	New Game	AlyssaHT	PythonTic-Tac-Toe	0% (0/1)
91	New Game	TURNER, SABASTIAN@1101 Kennedy	PythonTic-Tac-Toe	— (0/0)
92	New Game	CRAWLEY, COLT@1101 Kennedy	PythonTic-Tac-Toe	— (0/0)
93	New Game	LOPEZ ESTRADA, MARISSA@1101 Kennedy	PythonTic-Tac-Toe	0% (0/1)
94	New Game	Chipner.AnthonyO@Kennedy Middle	PythonTic-Tac-Toe	0% (0/2)
95	New Game	Edwin Disang	PythonTic-Tac-Toe	— (0/0)
96	New Game	WIGGALLM	JavaTic-Tac-Toe	— (0/0)
97	New Game	d j	PythonTic-Tac-Toe	0% (0/2)
98	New Game	d j	PythonTic-Tac-Toe	— (0/0)
99	New Game	VARADY, SOPHIE@1101 Kennedy	PythonTic-Tac-Toe	— (0/0)
100	New Game	Edwin Disang	PythonTic-Tac-Toe	— (0/0)

Java Hide and Sink leaderboard
#	Script	Author	Win rate
1	Smart?	Sam	100% (2/2)
2	Bombastic Random Boats	Juan @ Codecraft Works	99% (171/173)
3	New Game	DEMPSEY, EMRY@1101 Kennedy	67% (6/9)
4	New Game	KASPRZYK, RORY@1101 Kennedy	50% (3/6)
5	New Game	COWELL, JAMAR@1101 Kennedy	33% (2/6)
6	Shoot at 0, 0 <script>alert(1)</script>	Sam	0% (0/1)
7	Smart?	Sam	— (0/0)
8	New Game	Sam	— (0/0)
9	New Game	Gilberto Creque	0% (0/168)
10	Smart? 2	Sam	0% (0/1)
11	Actually, you know what, don't even put in a position	Sam	0% (0/2)

Python Tic-Tac-Toe leaderboard
#	Script	Author	Win rate
1	New Game	NICK, CADEN@1101 Kennedy	100% (2/2)
2	TicTacToe-1	M Gibson	100% (1/1)
3	New Game	CRAWLEY, COLT@1101 Kennedy	100% (1/1)
4	New Game	Edwin Disang	100% (1/1)
5	Marta's Tic Tac Toe	Marta Deese	100% (1/1)
6	New Game	JULIANELLI, MIGUEL@1101 Kennedy	100% (1/1)
7	New Game	Edwin Disang	100% (1/1)
8	New Game	EssaHT	87% (13/15)
9	New Game	L&CIndustries	86% (6/7)
10	New Game	HudsonHT	82% (9/11)
11	New Game	TeddHT	80% (8/10)
12	New Game	DAWKINS, SKYLER@1101 Kennedy	75% (3/4)
13	CCPC Blocky 🥷🏾 1	Gilberto Creque	73% (194/264)
14	final2	BrittanyHT	72% (13/18)
15	New Game	TURNER, SABASTIAN@1101 Kennedy	67% (2/3)
16	New Game	Edwin Disang	67% (2/3)
17	New Game	Edwin Disang	67% (2/3)
18	New Game	CRAWLEY, COLT@1101 Kennedy	67% (2/3)
19	K.O.'s Player	Codecraft Works	60% (3/5)
20	New Game	PRICE, MASON@1101 Kennedy	50% (1/2)
21	New Game	LEACH, MIKEL@1101 Kennedy	50% (2/4)
22	New Game	d j	50% (1/2)
23	New Game	RYAN, GAVIN@1101 Kennedy	50% (1/2)
24	New Game	Edwin Disang	50% (1/2)
25	Gib TicTacToe	M Gibson	50% (2/4)
26	final	BrittanyHT	50% (1/2)
27	Alyssa	AlyssaHT	50% (1/2)
28	THIS	AlyssaHT	50% (1/2)
29	New Game	Edwin Disang	43% (3/7)
30	New Game	PRICE, MASON@1101 Kennedy	33% (1/3)
31	New Game	BryanHT	33% (1/3)
32	New Game	AlyssaHT	33% (1/3)
33	marissa	LOPEZ ESTRADA, MARISSA@1101 Kennedy	27% (3/11)
34	Scary Random Snakes	Juan @ Codecraft Works	26% (65/248)
35	New Game	BryanHT	25% (1/4)
36	New Game	BryanHT	25% (2/8)
37	New Game	BryanHT	22% (2/9)
38	New Game	Aaron Leblanc	20% (1/5)
39	New Game	JamesHT	14% (1/7)
40	New Game	JULIANELLI, MIGUEL@1101 Kennedy	— (0/0)
41	cheese	JULIANELLI, MIGUEL@1101 Kennedy	— (0/0)
42	New Game	CRAWLEY, COLT@1101 Kennedy	— (0/0)
43	New Game	Koren Olson	— (0/0)
44	New Game	BELL, KA'SHAUN@1101 Kennedy	0% (0/1)
45	New Game	TURNER, SABASTIAN@1101 Kennedy	0% (0/1)
46	New Game	AlyssaHT	— (0/0)
47	New Game	CRAWLEY, COLT@1101 Kennedy	— (0/0)
48	New Game	JULIANELLI, MIGUEL@1101 Kennedy	0% (0/2)
49	New Game	DEER, JT@1101 Kennedy	0% (0/2)
50	New Game	Koren Olson	— (0/0)
51	New Game	CRAWLEY, COLT@1101 Kennedy	— (0/0)
52	New Game	SHRIVASTAV, ARYAN@1101 Kennedy	0% (0/1)
53	New Game	TeddHT	0% (0/1)
54	New Game	PRICE, MASON@1101 Kennedy	— (0/0)
55	New Game	DAWKINS, SKYLER@1101 Kennedy	0% (0/5)
56	An attempt 2	VARADY, SOPHIE@1101 Kennedy	— (0/0)
57	New Game	AlyssaHT	— (0/0)
58	New Game	d j	— (0/0)
59	New Game	CAMPOS, LIAM@1101 Kennedy	— (0/0)
60	New Game	BRADLEY, JASMIN@1101 Kennedy	— (0/0)
61	New Game	SHRIVASTAV, ARYAN@1101 Kennedy	— (0/0)
62	New Game	JULIANELLI, MIGUEL@1101 Kennedy	0% (0/1)
63	New Game	BrittanyHT	0% (0/1)
64	New Game	CAMPOS, LIAM@1101 Kennedy	0% (0/3)
65	New Game	AlyssaHT	0% (0/1)
66	New Game	TURNER, SABASTIAN@1101 Kennedy	— (0/0)
67	New Game	CRAWLEY, COLT@1101 Kennedy	— (0/0)
68	New Game	LOPEZ ESTRADA, MARISSA@1101 Kennedy	0% (0/1)
69	New Game	Chipner.AnthonyO@Kennedy Middle	0% (0/2)
70	New Game	Edwin Disang	— (0/0)
71	New Game	d j	0% (0/2)
72	New Game	d j	— (0/0)
73	New Game	VARADY, SOPHIE@1101 Kennedy	— (0/0)
74	New Game	Edwin Disang	— (0/0)
75	New Game	BRADLEY, JASMIN@1101 Kennedy	— (0/0)
76	New Game	DAWKINS, SKYLER@1101 Kennedy	— (0/0)
77	New Game	Edwin Disang	— (0/0)
78	An attempt	VARADY, SOPHIE@1101 Kennedy	— (0/0)
79	New Game	LEACH, MIKEL@1101 Kennedy	— (0/0)
80	New Game	TURNER, SABASTIAN@1101 Kennedy	— (0/0)
81	New Game	NICK, CADEN@1101 Kennedy	— (0/0)
82	New Game	Edwin Disang	— (0/0)
83	New Game	Edwin Disang	— (0/0)
84	New Game	VARADY, SOPHIE@1101 Kennedy	— (0/0)
85	New Game	RYAN, GAVIN@1101 Kennedy	0% (0/1)
86	New Game	Edwin Disang	— (0/0)
87	New Game	CAMPOS, LIAM@1101 Kennedy	0% (0/2)
88	New Game	BryanHT	0% (0/3)

Java Tic-Tac-Toe leaderboard
#	Script	Author	Win rate
1	New Game	EssaHT	100% (1/1)
2	New Game	SALCEDOG	100% (3/3)
3	New Game	ICEVA	86% (6/7)
4	New Game	BRISTOLA	67% (4/6)
5	Glitch	MECKB	60% (3/5)
6	Robsons Tic Tac to	CARVAJALR	60% (3/5)
7	New Game	MECKB	50% (2/4)
8	Chaotic Random Toffees	Juan @ Codecraft Works	43% (3/7)
9	Aaden's Tic Tac Toe	BRISTOLA	42% (5/12)
10	New Game	Tyler Campbell	17% (2/12)
11	New Game	LANDRUMS	— (0/0)
12	Final	MECKB	0% (0/1)
13	New Game	BRADLEY, JASMIN@1101 Kennedy	— (0/0)
14	New Game	WIGGALLM	— (0/0)
15	New Game	BRADLEY, JASMIN@1101 Kennedy	— (0/0)

Blockly Tic-Tac-Toe leaderboard
#	Script	Author	Win rate
1	Default Blocks but with Functions	Juan @ Codecraft Works	59% (323/552)
2	BattleBot	Michelle Delahoussaye	41% (229/552)

Write a program that plays the game

How it works

Choose a game

Build it in the Forge