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index.html
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<!--
Minesweeper Captcha - minesweeper based spam prevention
Copyright (C) 2021 Jieruei Chang
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-->
<!DOCTYPE html>
<html>
<head>
<title>Minesweeper Captcha</title>
<link rel=icon href=assets/logo.jpg>
<link rel=stylesheet href=style.css>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="description" content="Minesweeper-based spam detection">
<meta property="og:image" content="https://knosmos.github.io/mine-captcha/assets/banner.png">
<meta property="twitter:image" content="https://knosmos.github.io/mine-captcha/assets/banner.png">
<meta property="twitter:card" content="summary_large_image">
</head>
<body>
<div id=captcha-wrapper>
<div id=captcha>
<div id=captcha-header>
<h3>Select all four squares with</h3>
<h2>mines</h2>
</div>
<div id=tile-grid>
</div>
<hr>
<div id=captcha-footer>
<button id=new-puzzle onclick="make_minefield()">NEW</button>
<button id=submit onclick="verification_handler()">VERIFY</button>
</div>
</div>
<p>made by <a href="https://github.com/knosmos" target=_blank>knosmos</a> | inspired by <a href="https://xkcd.com/2496/" target=_blank>xkcd</a> | <a href="https://github.com/knosmos/mine-captcha" target=_blank>Source code</a></p>
</div>
<script src=minesweeper.js></script>
</body>
</html>