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+# oradel-chance
+
+![](https://img.shields.io/badge/written%20in-Javascript-blue)
+
+Calculate attack probabilities in the board game "Oracle of Delphi".
+
+## Changelog
+
+2018-03-24
+- Fix off-by-one in monster HP
+- Remove jQuery dependency
+
+2017-04-08
+- Initial public release
+
+
+## Download
+
+- [⬇️ oradel-chance.html](dist-archive/oradel-chance.html) *(4.18 KiB)*
--- a/dist-archive/oradel-chance.html
+++ b/dist-archive/oradel-chance.html
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+<!DOCTYPE html>
+<html>
+	<head>
+		<meta charset="UTF-8">
+		<style type="text/css">
+body {
+	font-family: sans-serif;
+}
+.corner {
+	display: inline-block;
+	width:48px;
+	height:48px;
+	background: url('data:image/jpeg;base64,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');
+}
+table {
+	border-collapse: collapse;
+}
+thead td {
+	text-align: center;
+}
+td:first-child {
+	text-align: center;
+}
+td {
+	padding: 3px 6px;
+	text-align: right;
+}
+.chance-bad {
+	color:red;
+}
+.chance-good {
+	color: orange;
+}
+.chance-high {
+	color: green;
+}
+.chance-perfect {
+	color: black;
+}
+
+		</style>
+	</head>
+	<body>
+
+		<h2>Oracle of Delphi<h2>
+		<h3>Chance of defeating a monster</h3>
+
+		<table>
+			<thead>
+				<tr>
+					<td>
+						<div class="corner"></div>
+					</td>
+					<td>0</td>
+					<td>1</td>
+					<td>2</td>
+					<td>3</td>
+					<td>4</td>
+					<td>5</td>
+					<td>6</td>
+					<td>7</td>
+					<td>8</td>
+				</tr>
+			</thead>
+			<tbody id="tbody"></tbody>
+		</table>
+
+		<script type="text/javascript">
+
+	var chance = function(current_shield) {
+		var monster_strength = (9 - current_shield);
+		return 1 - (monster_strength / 10);
+	};
+	
+	var chance_with_favor = function(effective_shields, remaining_turns) {
+		var base = chance(effective_shields);
+		if (remaining_turns == 0) {
+			return base;
+		}
+
+		var extra = (1 - base) * chance_with_favor(effective_shields + 1, remaining_turns - 1);
+		return base + extra;
+	};
+
+	var round = function(v) {
+		return Math.round(v * 100) / 100;
+	}
+
+	var tbody_content = []
+	for (var s = 0; s < 6; ++s) {
+		var tr = "<tr><td>" + s + "</td>";
+
+		for (var t = 0; t < 9; ++t) {
+			var c = chance_with_favor(s, t);
+			var className = ( c == 1 ? 'chance-perfect' : (c > 0.75 ? 'chance-high' : (c > 0.5 ? 'chance-good' : 'chance-bad')));
+			
+			tr += "<td class=\"" + className + "\">" + round(c * 100) + "%</td>"
+		}
+		
+		tbody_content.push(tr);
+	}
+	document.getElementById("tbody").innerHTML = tbody_content.join("");
+
+		</script>
+	</body>
+</html>
--- a/doc/screenshot.png
+++ b/doc/screenshot.png