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	Swift Aqua Telescope	Cheery Quail	PythonTic-Tac-Toe	100% (3/3)
2	Smart?	Sam	JavaHide and Sink	100% (3/3)
3	TicTacToe-1	M Gibson	PythonTic-Tac-Toe	100% (1/1)
4	Zany Lavender Antelope	EssaHT	JavaTic-Tac-Toe	100% (1/1)
5	Gentle Magenta Robot	Boundless Alpaca	PythonTic-Tac-Toe	100% (1/1)
6	Thunderous Turquoise Ferret	Edwin Disang	PythonTic-Tac-Toe	100% (1/1)
7	Marta's Tic Tac Toe	Marta Deese	PythonTic-Tac-Toe	100% (1/1)
8	Rugged Velvet Comet	Gulley Potoo	PythonTic-Tac-Toe	100% (1/1)
9	Cozy Crimson Volcano	Edwin Disang	PythonTic-Tac-Toe	100% (1/1)
10	Honest Pink Noodle	SALCEDOG	JavaTic-Tac-Toe	100% (3/3)
11	Bombastic Random Boats	Juan @ Codecraft Works	JavaHide and Sink	99% (171/173)
12	Happy Amber Pelican	EssaHT	PythonTic-Tac-Toe	87% (13/15)
13	Quirky Magenta Planet	ICEVA	JavaTic-Tac-Toe	86% (6/7)
14	Jumpy Lavender Telescope	L&CIndustries	PythonTic-Tac-Toe	86% (6/7)
15	Noble Apricot Walrus	HudsonHT	PythonTic-Tac-Toe	82% (9/11)
16	Roaring Navy Planet	TeddHT	PythonTic-Tac-Toe	80% (8/10)
17	Thunderous Ruby Dragonfly	Granite Wallaby	PythonTic-Tac-Toe	75% (3/4)
18	New Game	Spectacular Potato	BlocklyTic-Tac-Toe	74% (20/27)
19	CCPC Blocky 🥷🏾 1	Gilberto Creque	PythonTic-Tac-Toe	73% (194/265)
20	final2	BrittanyHT	PythonTic-Tac-Toe	72% (13/18)
21	Fancy Pearl Giraffe	Bustling Pika	PythonTic-Tac-Toe	67% (2/3)
22	Mellow Velvet Magnet	Edwin Disang	PythonTic-Tac-Toe	67% (2/3)
23	Eager Navy Yak	Trailing Wallaby	JavaHide and Sink	67% (6/9)
24	Gentle Emerald Satellite	Edwin Disang	PythonTic-Tac-Toe	67% (2/3)
25	Noble Azure Kite	BRISTOLA	JavaTic-Tac-Toe	67% (4/6)
26	Dreamy Jade Dolphin	Boundless Alpaca	PythonTic-Tac-Toe	67% (2/3)
27	Glitch	MECKB	JavaTic-Tac-Toe	60% (3/5)
28	K.O.'s Player	Codecraft Works	PythonTic-Tac-Toe	60% (3/5)
29	Robsons Tic Tac to	CARVAJALR	JavaTic-Tac-Toe	60% (3/5)
30	Default Blocks but with Functions	Juan @ Codecraft Works	BlocklyTic-Tac-Toe	58% (341/593)
31	Happy Ruby Quokka	Estuary Jay	PythonTic-Tac-Toe	50% (1/2)
32	Peppy Maroon Noodle	Highland Kingfisher	PythonTic-Tac-Toe	50% (2/4)
33	Speedy Peach Iguana	d j	PythonTic-Tac-Toe	50% (1/2)
34	Sparkly Velvet Crayon	Seaside Godwit	PythonTic-Tac-Toe	50% (1/2)
35	Loyal Copper Beetle	River Finch	JavaHide and Sink	50% (3/6)
36	Gentle Cobalt Narwhal	Edwin Disang	PythonTic-Tac-Toe	50% (1/2)
37	Gib TicTacToe	M Gibson	PythonTic-Tac-Toe	50% (2/4)
38	final	BrittanyHT	PythonTic-Tac-Toe	50% (1/2)
39	Alyssa	AlyssaHT	PythonTic-Tac-Toe	50% (1/2)
40	Jumpy Maroon Galaxy	MECKB	JavaTic-Tac-Toe	50% (2/4)
41	THIS	AlyssaHT	PythonTic-Tac-Toe	50% (1/2)
42	Merry Azure Blossom	Edwin Disang	PythonTic-Tac-Toe	43% (3/7)
43	Chaotic Random Toffees	Juan @ Codecraft Works	JavaTic-Tac-Toe	43% (3/7)
44	Aaden's Tic Tac Toe	BRISTOLA	JavaTic-Tac-Toe	42% (5/12)
45	BattleBot	Michelle Delahoussaye	BlocklyTic-Tac-Toe	41% (241/584)
46	Cosmic Pink Robot	Estuary Jay	PythonTic-Tac-Toe	33% (1/3)
47	Cheerful Emerald Dragon	Harbor Gull	JavaHide and Sink	33% (2/6)
48	Zippy Scarlet Starfish	BryanHT	PythonTic-Tac-Toe	33% (1/3)
49	Bright Indigo Rainbow	AlyssaHT	PythonTic-Tac-Toe	33% (1/3)
50	marissa	Crisp Skylark	PythonTic-Tac-Toe	27% (3/11)
51	Scary Random Snakes	Juan @ Codecraft Works	PythonTic-Tac-Toe	26% (65/248)
52	Epic Emerald Falcon	BryanHT	PythonTic-Tac-Toe	25% (1/4)
53	Jazzy Ruby Pelican	BryanHT	PythonTic-Tac-Toe	25% (2/8)
54	Jumpy Silver Marble	BryanHT	PythonTic-Tac-Toe	22% (2/9)
55	Whimsical Olive Dragon	Aaron Leblanc	PythonTic-Tac-Toe	20% (1/5)
56	Galactic Violet Cactus	Tyler Campbell	JavaTic-Tac-Toe	17% (2/12)
57	Lucky Tangerine Turtle	JamesHT	PythonTic-Tac-Toe	14% (1/7)
58	Rugged Mint Yak	LANDRUMS	JavaTic-Tac-Toe	— (0/0)
59	Friendly Maroon Gecko	Gulley Potoo	PythonTic-Tac-Toe	— (0/0)
60	cheese	Gulley Potoo	PythonTic-Tac-Toe	— (0/0)
61	Giant Apricot Seahorse	Boundless Alpaca	PythonTic-Tac-Toe	— (0/0)
62	Epic Crimson Bumblebee	Koren Olson	PythonTic-Tac-Toe	— (0/0)
63	Final	MECKB	JavaTic-Tac-Toe	0% (0/1)
64	Thunderous Periwinkle Cactus	Tumbling Marmot	PythonTic-Tac-Toe	0% (0/1)
65	Shiny Maroon Cricket	Bustling Pika	PythonTic-Tac-Toe	0% (0/1)
66	Shoot at 0, 0 <script>alert(1)</script>	Sam	JavaHide and Sink	0% (0/1)
67	Hopeful Crimson Beacon	AlyssaHT	PythonTic-Tac-Toe	— (0/0)
68	Witty Ivory Crayon	Boundless Alpaca	PythonTic-Tac-Toe	— (0/0)
69	Plucky Lavender Pangolin	Gulley Potoo	PythonTic-Tac-Toe	0% (0/2)
70	Fluffy Periwinkle Planet	Ember Marten	PythonTic-Tac-Toe	0% (0/2)
71	Twirly Violet Hedgehog	Koren Olson	PythonTic-Tac-Toe	— (0/0)
72	Smart?	Sam	JavaHide and Sink	— (0/0)
73	Friendly Jade Seahorse	Boundless Alpaca	PythonTic-Tac-Toe	— (0/0)
74	Quirky Peach Parrot	Grove Shearwater	PythonTic-Tac-Toe	0% (0/1)
75	Quiet Ruby Sequoia	TeddHT	PythonTic-Tac-Toe	0% (0/1)
76	Spiffy Silver Comet	Estuary Jay	PythonTic-Tac-Toe	— (0/0)
77	Mellow Apricot Meerkat	Granite Wallaby	PythonTic-Tac-Toe	0% (0/5)
78	Lively Magenta Crayon	Sam	JavaHide and Sink	— (0/0)
79	An attempt 2	Moonlit Marten	PythonTic-Tac-Toe	— (0/0)
80	Vivid Pink Giraffe	Gilberto Creque	JavaHide and Sink	0% (0/169)
81	Glowing Bronze Jellyfish	AlyssaHT	PythonTic-Tac-Toe	— (0/0)
82	Smart? 2	Sam	JavaHide and Sink	0% (0/1)
83	Jazzy Jade Lobster	d j	PythonTic-Tac-Toe	— (0/0)
84	Snappy Golden Chipmunk	Keen Numbat	JavaTic-Tac-Toe	— (0/0)
85	Peppy Navy Waterfall	Gilberto Creque	PythonTic-Tac-Toe	— (0/0)
86	Hopeful Lavender Jellyfish	Windy Coyote	PythonTic-Tac-Toe	— (0/0)
87	Electric Copper Heron	Keen Numbat	PythonTic-Tac-Toe	— (0/0)
88	Polished Cobalt Crayon	Grove Shearwater	PythonTic-Tac-Toe	— (0/0)
89	Fearless Sapphire Meerkat	Gulley Potoo	PythonTic-Tac-Toe	0% (0/1)
90	Cozy Peach Pinecone	BrittanyHT	PythonTic-Tac-Toe	0% (0/1)
91	Cozy Plum Falcon	Windy Coyote	PythonTic-Tac-Toe	0% (0/3)
92	Hasty Jade Meerkat	AlyssaHT	PythonTic-Tac-Toe	0% (0/1)
93	Whimsical Lemon Zeppelin	Bustling Pika	PythonTic-Tac-Toe	— (0/0)
94	Kind Ruby Gecko	Boundless Alpaca	PythonTic-Tac-Toe	— (0/0)
95	Helpful Indigo Comet	Crisp Skylark	PythonTic-Tac-Toe	0% (0/1)
96	Soaring Velvet Octopus	Chipner.AnthonyO@Kennedy Middle	PythonTic-Tac-Toe	0% (0/2)
97	Dazzling Lemon Lighthouse	Edwin Disang	PythonTic-Tac-Toe	— (0/0)
98	Bright Silver Tuba	WIGGALLM	JavaTic-Tac-Toe	— (0/0)
99	Plucky Peach Wombat	d j	PythonTic-Tac-Toe	0% (0/2)
100	Gentle Navy Waterfall	d j	PythonTic-Tac-Toe	— (0/0)

Java Hide and Sink leaderboard
#	Script	Author	Win rate
1	Smart?	Sam	100% (3/3)
2	Bombastic Random Boats	Juan @ Codecraft Works	99% (171/173)
3	Eager Navy Yak	Trailing Wallaby	67% (6/9)
4	Loyal Copper Beetle	River Finch	50% (3/6)
5	Cheerful Emerald Dragon	Harbor Gull	33% (2/6)
6	Shoot at 0, 0 <script>alert(1)</script>	Sam	0% (0/1)
7	Smart?	Sam	— (0/0)
8	Lively Magenta Crayon	Sam	— (0/0)
9	Vivid Pink Giraffe	Gilberto Creque	0% (0/169)
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	Swift Aqua Telescope	Cheery Quail	100% (3/3)
2	TicTacToe-1	M Gibson	100% (1/1)
3	Gentle Magenta Robot	Boundless Alpaca	100% (1/1)
4	Thunderous Turquoise Ferret	Edwin Disang	100% (1/1)
5	Marta's Tic Tac Toe	Marta Deese	100% (1/1)
6	Rugged Velvet Comet	Gulley Potoo	100% (1/1)
7	Cozy Crimson Volcano	Edwin Disang	100% (1/1)
8	Happy Amber Pelican	EssaHT	87% (13/15)
9	Jumpy Lavender Telescope	L&CIndustries	86% (6/7)
10	Noble Apricot Walrus	HudsonHT	82% (9/11)
11	Roaring Navy Planet	TeddHT	80% (8/10)
12	Thunderous Ruby Dragonfly	Granite Wallaby	75% (3/4)
13	CCPC Blocky 🥷🏾 1	Gilberto Creque	73% (194/265)
14	final2	BrittanyHT	72% (13/18)
15	Fancy Pearl Giraffe	Bustling Pika	67% (2/3)
16	Mellow Velvet Magnet	Edwin Disang	67% (2/3)
17	Gentle Emerald Satellite	Edwin Disang	67% (2/3)
18	Dreamy Jade Dolphin	Boundless Alpaca	67% (2/3)
19	K.O.'s Player	Codecraft Works	60% (3/5)
20	Happy Ruby Quokka	Estuary Jay	50% (1/2)
21	Peppy Maroon Noodle	Highland Kingfisher	50% (2/4)
22	Speedy Peach Iguana	d j	50% (1/2)
23	Sparkly Velvet Crayon	Seaside Godwit	50% (1/2)
24	Gentle Cobalt Narwhal	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	Merry Azure Blossom	Edwin Disang	43% (3/7)
30	Cosmic Pink Robot	Estuary Jay	33% (1/3)
31	Zippy Scarlet Starfish	BryanHT	33% (1/3)
32	Bright Indigo Rainbow	AlyssaHT	33% (1/3)
33	marissa	Crisp Skylark	27% (3/11)
34	Scary Random Snakes	Juan @ Codecraft Works	26% (65/248)
35	Epic Emerald Falcon	BryanHT	25% (1/4)
36	Jazzy Ruby Pelican	BryanHT	25% (2/8)
37	Jumpy Silver Marble	BryanHT	22% (2/9)
38	Whimsical Olive Dragon	Aaron Leblanc	20% (1/5)
39	Lucky Tangerine Turtle	JamesHT	14% (1/7)
40	Friendly Maroon Gecko	Gulley Potoo	— (0/0)
41	cheese	Gulley Potoo	— (0/0)
42	Giant Apricot Seahorse	Boundless Alpaca	— (0/0)
43	Epic Crimson Bumblebee	Koren Olson	— (0/0)
44	Thunderous Periwinkle Cactus	Tumbling Marmot	0% (0/1)
45	Shiny Maroon Cricket	Bustling Pika	0% (0/1)
46	Hopeful Crimson Beacon	AlyssaHT	— (0/0)
47	Witty Ivory Crayon	Boundless Alpaca	— (0/0)
48	Plucky Lavender Pangolin	Gulley Potoo	0% (0/2)
49	Fluffy Periwinkle Planet	Ember Marten	0% (0/2)
50	Twirly Violet Hedgehog	Koren Olson	— (0/0)
51	Friendly Jade Seahorse	Boundless Alpaca	— (0/0)
52	Quirky Peach Parrot	Grove Shearwater	0% (0/1)
53	Quiet Ruby Sequoia	TeddHT	0% (0/1)
54	Spiffy Silver Comet	Estuary Jay	— (0/0)
55	Mellow Apricot Meerkat	Granite Wallaby	0% (0/5)
56	An attempt 2	Moonlit Marten	— (0/0)
57	Glowing Bronze Jellyfish	AlyssaHT	— (0/0)
58	Jazzy Jade Lobster	d j	— (0/0)
59	Peppy Navy Waterfall	Gilberto Creque	— (0/0)
60	Hopeful Lavender Jellyfish	Windy Coyote	— (0/0)
61	Electric Copper Heron	Keen Numbat	— (0/0)
62	Polished Cobalt Crayon	Grove Shearwater	— (0/0)
63	Fearless Sapphire Meerkat	Gulley Potoo	0% (0/1)
64	Cozy Peach Pinecone	BrittanyHT	0% (0/1)
65	Cozy Plum Falcon	Windy Coyote	0% (0/3)
66	Hasty Jade Meerkat	AlyssaHT	0% (0/1)
67	Whimsical Lemon Zeppelin	Bustling Pika	— (0/0)
68	Kind Ruby Gecko	Boundless Alpaca	— (0/0)
69	Helpful Indigo Comet	Crisp Skylark	0% (0/1)
70	Soaring Velvet Octopus	Chipner.AnthonyO@Kennedy Middle	0% (0/2)
71	Dazzling Lemon Lighthouse	Edwin Disang	— (0/0)
72	Plucky Peach Wombat	d j	0% (0/2)
73	Gentle Navy Waterfall	d j	— (0/0)
74	Jumpy Plum Snail	Moonlit Marten	— (0/0)
75	Cheerful Jade Falcon	Edwin Disang	— (0/0)
76	Gentle Plum Salamander	Keen Numbat	— (0/0)
77	Proud Olive Galaxy	Granite Wallaby	— (0/0)
78	Speedy Silver Meteor	Edwin Disang	— (0/0)
79	An attempt	Moonlit Marten	— (0/0)
80	Daring Jade Cactus	Highland Kingfisher	— (0/0)
81	Polished Crimson Sparrow	Bustling Pika	— (0/0)
82	Rustic Coral Waffle	Cheery Quail	— (0/0)
83	Sunny Olive Heron	Edwin Disang	— (0/0)
84	Glowing Pink Dragonfly	Edwin Disang	— (0/0)
85	Sparkly Periwinkle Cricket	Moonlit Marten	— (0/0)
86	Helpful Magenta Beacon	Seaside Godwit	0% (0/1)
87	Toasty Cobalt Antelope	Edwin Disang	— (0/0)
88	Roaring Emerald Anchor	Windy Coyote	0% (0/2)
89	Lucky Lemon Blossom	BryanHT	0% (0/3)

Java Tic-Tac-Toe leaderboard
#	Script	Author	Win rate
1	Zany Lavender Antelope	EssaHT	100% (1/1)
2	Honest Pink Noodle	SALCEDOG	100% (3/3)
3	Quirky Magenta Planet	ICEVA	86% (6/7)
4	Noble Azure Kite	BRISTOLA	67% (4/6)
5	Glitch	MECKB	60% (3/5)
6	Robsons Tic Tac to	CARVAJALR	60% (3/5)
7	Jumpy Maroon Galaxy	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	Galactic Violet Cactus	Tyler Campbell	17% (2/12)
11	Rugged Mint Yak	LANDRUMS	— (0/0)
12	Final	MECKB	0% (0/1)
13	Snappy Golden Chipmunk	Keen Numbat	— (0/0)
14	Bright Silver Tuba	WIGGALLM	— (0/0)
15	Peppy Pink Ukulele	Keen Numbat	— (0/0)

Blockly Tic-Tac-Toe leaderboard
#	Script	Author	Win rate
1	New Game	Spectacular Potato	74% (20/27)
2	Default Blocks but with Functions	Juan @ Codecraft Works	58% (341/593)
3	BattleBot	Michelle Delahoussaye	41% (241/584)

Write a program that plays the game

How it works

Choose a game

Build it in the Forge