diff --git a/solutions/day10/input.txt b/solutions/day10/input.txt
new file mode 100644
index 0000000..5b0d755
--- /dev/null
+++ b/solutions/day10/input.txt
@@ -0,0 +1,102 @@
+153
+17
+45
+57
+16
+147
+39
+121
+75
+70
+85
+134
+128
+115
+51
+139
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+105
+31
+103
+89
+154
+114
+55
+25
+48
+38
+132
+157
+84
+71
+113
+143
+83
+64
+109
+129
+120
+100
+151
+79
+125
+22
+161
+167
+19
+26
+118
+142
+4
+158
+11
+35
+56
+18
+40
+7
+150
+99
+54
+152
+60
+27
+164
+78
+47
+82
+63
+46
+91
+32
+135
+3
+108
+10
+159
+127
+69
+110
+126
+133
+28
+15
+104
+138
+160
+98
+90
+144
+1
+2
+92
+41
+86
+66
+95
+12
diff --git a/solutions/day10/solution.js b/solutions/day10/solution.js
new file mode 100644
index 0000000..2ac2a20
--- /dev/null
+++ b/solutions/day10/solution.js
@@ -0,0 +1,48 @@
+const path = require('path')
+const { read, position } = require('promise-path')
+const fromHere = position(__dirname)
+const report = (...messages) => console.log(`[${require(fromHere('../../package.json')).logName} / ${__dirname.split(path.sep).pop()}]`, ...messages)
+
+async function run () {
+  const input = (await read(fromHere('input.txt'), 'utf8')).trim().split('\n').map(x => 1 * x).sort((a, b) => b - a)
+  input.push(0)
+  input.unshift(input[0] + 3)
+
+  solveForFirstStar(input)
+  solveForSecondStar(input)
+}
+
+function solveForFirstStar (input) {
+  let ones = 0
+  let threes = 0
+  input.forEach((s, i, S) => {
+    const diff = s - S[i + 1]
+    if (diff === 1) {
+      ones++
+    }
+    if (diff === 3) {
+      threes++
+    }
+  })
+  const solution = ones * threes
+  report('Solution 1:', solution)
+}
+
+function solveForSecondStar (input) {
+  const choices = []
+  input.forEach((s, i, S) => {
+    choices[i] = i === 0 ? 1 : 0
+    for (let j = 1; ; j++) {
+      if (S[i - j] - s <= 3) {
+        choices[i] += choices[i - j]
+      } else {
+        break
+      }
+    }
+  })
+
+  const solution = choices[choices.length - 1]
+  report('Solution 2:', solution)
+}
+
+run()
diff --git a/solutions/day10/viewer.html b/solutions/day10/viewer.html
new file mode 100644
index 0000000..d583fae
--- /dev/null
+++ b/solutions/day10/viewer.html
@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <title>Solution Viewer</title>
+    <style>
+      html, body { font-family: sans-serif; }
+      pre { border-radius: 0.5em; padding: 0.5em; background: #eee; }
+    </style>
+    <script src="https://cdn.jsdelivr.net/npm/axios/dist/axios.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/vue"></script>
+  </head>
+  <body>
+    <div id="viewer">
+      <h1>Solution Viewer ({{ solutionTitle }})</h1>
+      <p>For interesting problems; this page can be used as a dynamic viewer.</p>
+      <h3><a href="./input.txt">input.txt</a></h3>
+      <pre><code>{{ inputText }}</code></pre>
+      <h3><a href="./solution.js">solution.js</a></h3>
+      <pre><code>{{ solutionText }}</code></pre>
+    </div>
+    <script>
+const app = new Vue({
+  el: '#viewer',
+  data: () => {
+    return {
+      solutionText: '[Loading]',
+      inputText: '[Loading]'
+    }
+  },
+  computed: {
+    solutionTitle() {
+      const parts = (document.location + '').split('/')
+      return parts.reverse()[1]
+    }
+  },
+  async mounted () {
+    this.solutionText = (await axios.get('./solution.js')).data
+    this.inputText = (await axios.get('./input.txt')).data
+  }
+})
+    </script>
+  </body>
+</html>
\ No newline at end of file
