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	Clever Navy Boulder	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	Daring Magenta Waterfall	EssaHT	JavaTic-Tac-Toe	100% (1/1)
5	Decadent Random Toffees	Unknown	JavaTic-Tac-Toe	100% (1/1)
6	Bouncy Mint Telescope	CRAWLEY, COLT@1101 Kennedy	PythonTic-Tac-Toe	100% (1/1)
7	Jolly Velvet Trombone	Edwin Disang	PythonTic-Tac-Toe	100% (1/1)
8	Marta's Tic Tac Toe	Marta Deese	PythonTic-Tac-Toe	100% (1/1)
9	Daring Mint Seahorse	JULIANELLI, MIGUEL@1101 Kennedy	PythonTic-Tac-Toe	100% (1/1)
10	Mighty Ruby Cricket	Edwin Disang	PythonTic-Tac-Toe	100% (1/1)
11	Jolly Emerald Lobster	SALCEDOG	JavaTic-Tac-Toe	100% (3/3)
12	Bombastic Random Boats	Juan @ Codecraft Works	JavaHide and Sink	99% (171/173)
13	Cheerful Copper Gecko	EssaHT	PythonTic-Tac-Toe	87% (13/15)
14	Lively Maroon Pinecone	ICEVA	JavaTic-Tac-Toe	86% (6/7)
15	Sunny Magenta Giraffe	L&CIndustries	PythonTic-Tac-Toe	86% (6/7)
16	Converted:BatteScript 🥷🏾	Unknown	PythonTic-Tac-Toe	82% (394/480)
17	Rugged Pearl Beetle	HudsonHT	PythonTic-Tac-Toe	82% (9/11)
18	Quiet Cobalt Cricket	TeddHT	PythonTic-Tac-Toe	80% (8/10)
19	Loyal Peach Tuba	DAWKINS, SKYLER@1101 Kennedy	PythonTic-Tac-Toe	75% (3/4)
20	CCPC Blocky 🥷🏾 1	Gilberto Creque	PythonTic-Tac-Toe	73% (194/264)
21	final2	BrittanyHT	PythonTic-Tac-Toe	72% (13/18)
22	Thunderous Peach Boulder	TURNER, SABASTIAN@1101 Kennedy	PythonTic-Tac-Toe	67% (2/3)
23	Proud Scarlet Sunflower	Edwin Disang	PythonTic-Tac-Toe	67% (2/3)
24	Cheerful Violet Panda	DEMPSEY, EMRY@1101 Kennedy	JavaHide and Sink	67% (6/9)
25	Fearless Amber Pelican	Edwin Disang	PythonTic-Tac-Toe	67% (2/3)
26	Thunderous Olive Starfish	BRISTOLA	JavaTic-Tac-Toe	67% (4/6)
27	Sunny Aqua Bumblebee	CRAWLEY, COLT@1101 Kennedy	PythonTic-Tac-Toe	67% (2/3)
28	Glitch	MECKB	JavaTic-Tac-Toe	60% (3/5)
29	K.O.'s Player	Codecraft Works	PythonTic-Tac-Toe	60% (3/5)
30	Robsons Tic Tac to	CARVAJALR	JavaTic-Tac-Toe	60% (3/5)
31	Default Blocks but with Functions	Juan @ Codecraft Works	BlocklyTic-Tac-Toe	58% (374/642)
32	BatteScript 🥷🏾	Unknown	BlocklyTic-Tac-Toe	54% (507/945)
33	Cool Default Blocks	Unknown	BlocklyTic-Tac-Toe	53% (500/949)
34	Mark 1	Unknown	BlocklyTic-Tac-Toe	53% (492/935)
35	Swift Periwinkle Noodle	PRICE, MASON@1101 Kennedy	PythonTic-Tac-Toe	50% (1/2)
36	Rustic Golden Puffin	LEACH, MIKEL@1101 Kennedy	PythonTic-Tac-Toe	50% (2/4)
37	Lucky Ruby Panda	d j	PythonTic-Tac-Toe	50% (1/2)
38	Cosmic Peach Seahorse	RYAN, GAVIN@1101 Kennedy	PythonTic-Tac-Toe	50% (1/2)
39	Chirpy Amber Zeppelin	KASPRZYK, RORY@1101 Kennedy	JavaHide and Sink	50% (3/6)
40	Mellow Periwinkle Zeppelin	Edwin Disang	PythonTic-Tac-Toe	50% (1/2)
41	Gib TicTacToe	M Gibson	PythonTic-Tac-Toe	50% (2/4)
42	final	BrittanyHT	PythonTic-Tac-Toe	50% (1/2)
43	Alyssa	AlyssaHT	PythonTic-Tac-Toe	50% (1/2)
44	Honest Lilac Kayak	MECKB	JavaTic-Tac-Toe	50% (2/4)
45	THIS	AlyssaHT	PythonTic-Tac-Toe	50% (1/2)
46	Soaring Navy Galaxy	Edwin Disang	PythonTic-Tac-Toe	43% (3/7)
47	Chaotic Random Toffees	Juan @ Codecraft Works	JavaTic-Tac-Toe	43% (3/7)
48	Aaden's Tic Tac Toe	BRISTOLA	JavaTic-Tac-Toe	42% (5/12)
49	BattleBot	Michelle Delahoussaye	BlocklyTic-Tac-Toe	40% (232/579)
50	Incredible Random Blocks	Unknown	BlocklyTic-Tac-Toe	40% (319/797)
51	Scary Random Snakes	Unknown	PythonTic-Tac-Toe	36% (108/302)
52	Honest Apricot Lighthouse	PRICE, MASON@1101 Kennedy	PythonTic-Tac-Toe	33% (1/3)
53	Curious Azure Lemur	COWELL, JAMAR@1101 Kennedy	JavaHide and Sink	33% (2/6)
54	Fancy Navy Sloth	BryanHT	PythonTic-Tac-Toe	33% (1/3)
55	Mighty Peach Antelope	AlyssaHT	PythonTic-Tac-Toe	33% (1/3)
56	marissa	LOPEZ ESTRADA, MARISSA@1101 Kennedy	PythonTic-Tac-Toe	27% (3/11)
57	Scary Random Snakes	Juan @ Codecraft Works	PythonTic-Tac-Toe	26% (65/248)
58	Quick Cobalt Bumblebee	BryanHT	PythonTic-Tac-Toe	25% (1/4)
59	Cheerful Lime Bumblebee	BryanHT	PythonTic-Tac-Toe	25% (2/8)
60	Coordinated Priority Snakes	Unknown	PythonTic-Tac-Toe	25% (92/372)
61	Giggly Sapphire Hedgehog	BryanHT	PythonTic-Tac-Toe	22% (2/9)
62	Troublesome RuntimeError Snakes	Unknown	PythonTic-Tac-Toe	21% (12/58)
63	Fancy Golden Pumpkin	Aaron Leblanc	PythonTic-Tac-Toe	20% (1/5)
64	Wobbly Amber Badger	Tyler Campbell	JavaTic-Tac-Toe	17% (2/12)
65	Zany Bronze Cricket	JamesHT	PythonTic-Tac-Toe	14% (1/7)
66	Hidden Random Boats	Unknown	JavaHide and Sink	— (0/0)
67	Clever Pearl Robot	LANDRUMS	JavaTic-Tac-Toe	— (0/0)
68	Bubbly Mint Cricket	JULIANELLI, MIGUEL@1101 Kennedy	PythonTic-Tac-Toe	— (0/0)
69	cheese	JULIANELLI, MIGUEL@1101 Kennedy	PythonTic-Tac-Toe	— (0/0)
70	Soaring Crimson Volcano	CRAWLEY, COLT@1101 Kennedy	PythonTic-Tac-Toe	— (0/0)
71	Noble Golden Puffin	Koren Olson	PythonTic-Tac-Toe	— (0/0)
72	Final	MECKB	JavaTic-Tac-Toe	0% (0/1)
73	Noble Lemon Pelican	BELL, KA'SHAUN@1101 Kennedy	PythonTic-Tac-Toe	0% (0/1)
74	Vivid Magenta Sprocket	TURNER, SABASTIAN@1101 Kennedy	PythonTic-Tac-Toe	0% (0/1)
75	Shoot at 0, 0 <script>alert(1)</script>	Sam	JavaHide and Sink	0% (0/1)
76	Sunny Bronze Sparrow	AlyssaHT	PythonTic-Tac-Toe	— (0/0)
77	Kind Pearl Walrus	CRAWLEY, COLT@1101 Kennedy	PythonTic-Tac-Toe	— (0/0)
78	Quiet Copper Sunflower	JULIANELLI, MIGUEL@1101 Kennedy	PythonTic-Tac-Toe	0% (0/2)
79	Quirky Ivory Heron	DEER, JT@1101 Kennedy	PythonTic-Tac-Toe	0% (0/2)
80	Giggly Mint Anchor	Koren Olson	PythonTic-Tac-Toe	— (0/0)
81	Smart?	Sam	JavaHide and Sink	— (0/0)
82	Merry Neon Puffin	CRAWLEY, COLT@1101 Kennedy	PythonTic-Tac-Toe	— (0/0)
83	Clever Velvet Otter	SHRIVASTAV, ARYAN@1101 Kennedy	PythonTic-Tac-Toe	0% (0/1)
84	Plucky Lavender Lantern	TeddHT	PythonTic-Tac-Toe	0% (0/1)
85	Bright Teal Pelican	PRICE, MASON@1101 Kennedy	PythonTic-Tac-Toe	— (0/0)
86	Bubbly Lime Galaxy	DAWKINS, SKYLER@1101 Kennedy	PythonTic-Tac-Toe	0% (0/5)
87	Brave Magenta Bumblebee	Sam	JavaHide and Sink	— (0/0)
88	An attempt 2	VARADY, SOPHIE@1101 Kennedy	PythonTic-Tac-Toe	— (0/0)
89	Mellow Copper Snail	Gilberto Creque	JavaHide and Sink	0% (0/168)
90	Clever Scarlet Dragon	AlyssaHT	PythonTic-Tac-Toe	— (0/0)
91	Smart? 2	Sam	JavaHide and Sink	0% (0/1)
92	Clever Lilac Fiddle	d j	PythonTic-Tac-Toe	— (0/0)
93	Cosmic Turquoise Squid	BRADLEY, JASMIN@1101 Kennedy	JavaTic-Tac-Toe	— (0/0)
94	Fancy Teal Satellite	CAMPOS, LIAM@1101 Kennedy	PythonTic-Tac-Toe	— (0/0)
95	Zippy Lemon Comet	BRADLEY, JASMIN@1101 Kennedy	PythonTic-Tac-Toe	— (0/0)
96	Gleaming Azure Parrot	SHRIVASTAV, ARYAN@1101 Kennedy	PythonTic-Tac-Toe	— (0/0)
97	Breezy Golden Koala	JULIANELLI, MIGUEL@1101 Kennedy	PythonTic-Tac-Toe	0% (0/1)
98	Bouncy Amber Gecko	BrittanyHT	PythonTic-Tac-Toe	0% (0/1)
99	Wandering Violet Lighthouse	CAMPOS, LIAM@1101 Kennedy	PythonTic-Tac-Toe	0% (0/3)
100	Cheerful Velvet Ferret	AlyssaHT	PythonTic-Tac-Toe	0% (0/1)

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	Cheerful Violet Panda	DEMPSEY, EMRY@1101 Kennedy	67% (6/9)
4	Chirpy Amber Zeppelin	KASPRZYK, RORY@1101 Kennedy	50% (3/6)
5	Curious Azure Lemur	COWELL, JAMAR@1101 Kennedy	33% (2/6)
6	Hidden Random Boats	Unknown	— (0/0)
7	Shoot at 0, 0 <script>alert(1)</script>	Sam	0% (0/1)
8	Smart?	Sam	— (0/0)
9	Brave Magenta Bumblebee	Sam	— (0/0)
10	Mellow Copper Snail	Gilberto Creque	0% (0/168)
11	Smart? 2	Sam	0% (0/1)
12	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	Clever Navy Boulder	NICK, CADEN@1101 Kennedy	100% (2/2)
2	TicTacToe-1	M Gibson	100% (1/1)
3	Bouncy Mint Telescope	CRAWLEY, COLT@1101 Kennedy	100% (1/1)
4	Jolly Velvet Trombone	Edwin Disang	100% (1/1)
5	Marta's Tic Tac Toe	Marta Deese	100% (1/1)
6	Daring Mint Seahorse	JULIANELLI, MIGUEL@1101 Kennedy	100% (1/1)
7	Mighty Ruby Cricket	Edwin Disang	100% (1/1)
8	Cheerful Copper Gecko	EssaHT	87% (13/15)
9	Sunny Magenta Giraffe	L&CIndustries	86% (6/7)
10	Converted:BatteScript 🥷🏾	Unknown	82% (394/480)
11	Rugged Pearl Beetle	HudsonHT	82% (9/11)
12	Quiet Cobalt Cricket	TeddHT	80% (8/10)
13	Loyal Peach Tuba	DAWKINS, SKYLER@1101 Kennedy	75% (3/4)
14	CCPC Blocky 🥷🏾 1	Gilberto Creque	73% (194/264)
15	final2	BrittanyHT	72% (13/18)
16	Thunderous Peach Boulder	TURNER, SABASTIAN@1101 Kennedy	67% (2/3)
17	Proud Scarlet Sunflower	Edwin Disang	67% (2/3)
18	Fearless Amber Pelican	Edwin Disang	67% (2/3)
19	Sunny Aqua Bumblebee	CRAWLEY, COLT@1101 Kennedy	67% (2/3)
20	K.O.'s Player	Codecraft Works	60% (3/5)
21	Swift Periwinkle Noodle	PRICE, MASON@1101 Kennedy	50% (1/2)
22	Rustic Golden Puffin	LEACH, MIKEL@1101 Kennedy	50% (2/4)
23	Lucky Ruby Panda	d j	50% (1/2)
24	Cosmic Peach Seahorse	RYAN, GAVIN@1101 Kennedy	50% (1/2)
25	Mellow Periwinkle Zeppelin	Edwin Disang	50% (1/2)
26	Gib TicTacToe	M Gibson	50% (2/4)
27	final	BrittanyHT	50% (1/2)
28	Alyssa	AlyssaHT	50% (1/2)
29	THIS	AlyssaHT	50% (1/2)
30	Soaring Navy Galaxy	Edwin Disang	43% (3/7)
31	Scary Random Snakes	Unknown	36% (108/302)
32	Honest Apricot Lighthouse	PRICE, MASON@1101 Kennedy	33% (1/3)
33	Fancy Navy Sloth	BryanHT	33% (1/3)
34	Mighty Peach Antelope	AlyssaHT	33% (1/3)
35	marissa	LOPEZ ESTRADA, MARISSA@1101 Kennedy	27% (3/11)
36	Scary Random Snakes	Juan @ Codecraft Works	26% (65/248)
37	Quick Cobalt Bumblebee	BryanHT	25% (1/4)
38	Cheerful Lime Bumblebee	BryanHT	25% (2/8)
39	Coordinated Priority Snakes	Unknown	25% (92/372)
40	Giggly Sapphire Hedgehog	BryanHT	22% (2/9)
41	Troublesome RuntimeError Snakes	Unknown	21% (12/58)
42	Fancy Golden Pumpkin	Aaron Leblanc	20% (1/5)
43	Zany Bronze Cricket	JamesHT	14% (1/7)
44	Bubbly Mint Cricket	JULIANELLI, MIGUEL@1101 Kennedy	— (0/0)
45	cheese	JULIANELLI, MIGUEL@1101 Kennedy	— (0/0)
46	Soaring Crimson Volcano	CRAWLEY, COLT@1101 Kennedy	— (0/0)
47	Noble Golden Puffin	Koren Olson	— (0/0)
48	Noble Lemon Pelican	BELL, KA'SHAUN@1101 Kennedy	0% (0/1)
49	Vivid Magenta Sprocket	TURNER, SABASTIAN@1101 Kennedy	0% (0/1)
50	Sunny Bronze Sparrow	AlyssaHT	— (0/0)
51	Kind Pearl Walrus	CRAWLEY, COLT@1101 Kennedy	— (0/0)
52	Quiet Copper Sunflower	JULIANELLI, MIGUEL@1101 Kennedy	0% (0/2)
53	Quirky Ivory Heron	DEER, JT@1101 Kennedy	0% (0/2)
54	Giggly Mint Anchor	Koren Olson	— (0/0)
55	Merry Neon Puffin	CRAWLEY, COLT@1101 Kennedy	— (0/0)
56	Clever Velvet Otter	SHRIVASTAV, ARYAN@1101 Kennedy	0% (0/1)
57	Plucky Lavender Lantern	TeddHT	0% (0/1)
58	Bright Teal Pelican	PRICE, MASON@1101 Kennedy	— (0/0)
59	Bubbly Lime Galaxy	DAWKINS, SKYLER@1101 Kennedy	0% (0/5)
60	An attempt 2	VARADY, SOPHIE@1101 Kennedy	— (0/0)
61	Clever Scarlet Dragon	AlyssaHT	— (0/0)
62	Clever Lilac Fiddle	d j	— (0/0)
63	Fancy Teal Satellite	CAMPOS, LIAM@1101 Kennedy	— (0/0)
64	Zippy Lemon Comet	BRADLEY, JASMIN@1101 Kennedy	— (0/0)
65	Gleaming Azure Parrot	SHRIVASTAV, ARYAN@1101 Kennedy	— (0/0)
66	Breezy Golden Koala	JULIANELLI, MIGUEL@1101 Kennedy	0% (0/1)
67	Bouncy Amber Gecko	BrittanyHT	0% (0/1)
68	Wandering Violet Lighthouse	CAMPOS, LIAM@1101 Kennedy	0% (0/3)
69	Cheerful Velvet Ferret	AlyssaHT	0% (0/1)
70	Dazzling Pink Yak	TURNER, SABASTIAN@1101 Kennedy	— (0/0)
71	Quirky Scarlet Meteor	CRAWLEY, COLT@1101 Kennedy	— (0/0)
72	Crafty Violet Tiger	LOPEZ ESTRADA, MARISSA@1101 Kennedy	0% (0/1)
73	Cozy Olive Bumblebee	Chipner.AnthonyO@Kennedy Middle	0% (0/2)
74	Wiggly Peach Orbit	Edwin Disang	— (0/0)
75	Breezy Navy Sloth	d j	0% (0/2)
76	Twirly Lemon Turtle	d j	— (0/0)
77	Noble Teal Snail	VARADY, SOPHIE@1101 Kennedy	— (0/0)
78	Quirky Violet Dolphin	Edwin Disang	— (0/0)
79	Crafty Indigo Turtle	BRADLEY, JASMIN@1101 Kennedy	— (0/0)
80	Jazzy Plum Blossom	DAWKINS, SKYLER@1101 Kennedy	— (0/0)
81	Mighty Plum Octopus	Edwin Disang	— (0/0)
82	An attempt	VARADY, SOPHIE@1101 Kennedy	— (0/0)
83	Noble Teal Pinecone	LEACH, MIKEL@1101 Kennedy	— (0/0)
84	Gleaming Aqua Pelican	TURNER, SABASTIAN@1101 Kennedy	— (0/0)
85	Bouncy Lime Rocket	NICK, CADEN@1101 Kennedy	— (0/0)
86	Helpful Apricot Ukulele	Edwin Disang	— (0/0)
87	Crafty Amber Glacier	Edwin Disang	— (0/0)
88	Vivid Coral Raccoon	VARADY, SOPHIE@1101 Kennedy	— (0/0)
89	Bright Periwinkle Kite	RYAN, GAVIN@1101 Kennedy	0% (0/1)
90	Twirly Pink Penguin	Edwin Disang	— (0/0)
91	Cozy Sapphire Parrot	CAMPOS, LIAM@1101 Kennedy	0% (0/2)
92	Brave Indigo Orbit	BryanHT	0% (0/3)

Java Tic-Tac-Toe leaderboard
#	Script	Author	Win rate
1	Daring Magenta Waterfall	EssaHT	100% (1/1)
2	Decadent Random Toffees	Unknown	100% (1/1)
3	Jolly Emerald Lobster	SALCEDOG	100% (3/3)
4	Lively Maroon Pinecone	ICEVA	86% (6/7)
5	Thunderous Olive Starfish	BRISTOLA	67% (4/6)
6	Glitch	MECKB	60% (3/5)
7	Robsons Tic Tac to	CARVAJALR	60% (3/5)
8	Honest Lilac Kayak	MECKB	50% (2/4)
9	Chaotic Random Toffees	Juan @ Codecraft Works	43% (3/7)
10	Aaden's Tic Tac Toe	BRISTOLA	42% (5/12)
11	Wobbly Amber Badger	Tyler Campbell	17% (2/12)
12	Clever Pearl Robot	LANDRUMS	— (0/0)
13	Final	MECKB	0% (0/1)
14	Cosmic Turquoise Squid	BRADLEY, JASMIN@1101 Kennedy	— (0/0)
15	Fearless Olive Heron	WIGGALLM	— (0/0)
16	Jolly Bronze Anchor	Unknown	— (0/0)
17	Nimble Cobalt Heron	BRADLEY, JASMIN@1101 Kennedy	— (0/0)
18	The Worst Bot! ❌	Unknown	— (0/0)

Blockly Tic-Tac-Toe leaderboard
#	Script	Author	Win rate
1	Default Blocks but with Functions	Juan @ Codecraft Works	58% (374/642)
2	BatteScript 🥷🏾	Unknown	54% (507/945)
3	Cool Default Blocks	Unknown	53% (500/949)
4	Mark 1	Unknown	53% (492/935)
5	BattleBot	Michelle Delahoussaye	40% (232/579)
6	Incredible Random Blocks	Unknown	40% (319/797)

Write a program that plays the game

How it works

Choose a game

Build it in the Forge