diff --git a/package-lock.json b/package-lock.json
index ff946f8..774c924 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -166,6 +166,15 @@
       "resolved": "https://registry.npmjs.org/asap/-/asap-2.0.6.tgz",
       "integrity": "sha1-5QNHYR1+aQlDIIu9r+vLwvuGbUY="
     },
+    "ascii2mathml": {
+      "version": "0.6.2",
+      "resolved": "https://registry.npmjs.org/ascii2mathml/-/ascii2mathml-0.6.2.tgz",
+      "integrity": "sha512-tkPONh2Y7ZpuGQw6AiRnExX/CSYf5C2T/rF+UMJq5n0Us7+QjL8VY5ZE16xo9wcXhdqPkl/F7lzEzU9HX0YKng==",
+      "optional": true,
+      "requires": {
+        "minimist": "^1.2.0"
+      }
+    },
     "asn1": {
       "version": "0.2.4",
       "resolved": "https://registry.npmjs.org/asn1/-/asn1-0.2.4.tgz",
@@ -479,11 +488,6 @@
         "upath": "^1.1.1"
       }
     },
-    "chownr": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/chownr/-/chownr-1.1.1.tgz",
-      "integrity": "sha512-j38EvO5+LHX84jlo6h4UzmOwi0UgW61WRyPtJz4qaadK5eY3BTS5TY/S1Stc3Uk2lIM6TPevAlULiEJwie860g=="
-    },
     "class-utils": {
       "version": "0.3.6",
       "resolved": "https://registry.npmjs.org/class-utils/-/class-utils-0.3.6.tgz",
@@ -585,14 +589,6 @@
         "pg": "^7.4.3"
       }
     },
-    "connect-sqlite3": {
-      "version": "0.9.11",
-      "resolved": "https://registry.npmjs.org/connect-sqlite3/-/connect-sqlite3-0.9.11.tgz",
-      "integrity": "sha1-TlQVXcLq3ypZmDhbLzXoPdkkCy0=",
-      "requires": {
-        "sqlite3": "^4.0.0"
-      }
-    },
     "console-control-strings": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/console-control-strings/-/console-control-strings-1.1.0.tgz",
@@ -701,11 +697,6 @@
       "resolved": "https://registry.npmjs.org/decode-uri-component/-/decode-uri-component-0.2.0.tgz",
       "integrity": "sha1-6zkTMzRYd1y4TNGh+uBiEGu4dUU="
     },
-    "deep-extend": {
-      "version": "0.6.0",
-      "resolved": "https://registry.npmjs.org/deep-extend/-/deep-extend-0.6.0.tgz",
-      "integrity": "sha512-LOHxIOaPYdHlJRtCQfDIVZtfw/ufM8+rVj649RIHzcm/vGwQRXFt6OPqIFWsm2XEMrNIEtWR64sY1LEKD2vAOA=="
-    },
     "define-property": {
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/define-property/-/define-property-2.0.2.tgz",
@@ -768,11 +759,6 @@
       "resolved": "https://registry.npmjs.org/destroy/-/destroy-1.0.4.tgz",
       "integrity": "sha1-l4hXRCxEdJ5CBmE+N5RiBYJqvYA="
     },
-    "detect-libc": {
-      "version": "1.0.3",
-      "resolved": "https://registry.npmjs.org/detect-libc/-/detect-libc-1.0.3.tgz",
-      "integrity": "sha1-+hN8S9aY7fVc1c0CrFWfkaTEups="
-    },
     "doctypes": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/doctypes/-/doctypes-1.1.0.tgz",
@@ -1167,14 +1153,6 @@
         "universalify": "^0.1.0"
       }
     },
-    "fs-minipass": {
-      "version": "1.2.5",
-      "resolved": "https://registry.npmjs.org/fs-minipass/-/fs-minipass-1.2.5.tgz",
-      "integrity": "sha512-JhBl0skXjUPCFH7x6x61gQxrKyXsxB5gcgePLZCwfyCGGsTISMoIeObbrvVeP6Xmyaudw4TT43qV2Gz+iyd2oQ==",
-      "requires": {
-        "minipass": "^2.2.1"
-      }
-    },
     "fs.realpath": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/fs.realpath/-/fs.realpath-1.0.0.tgz",
@@ -1876,14 +1854,6 @@
         "safer-buffer": ">= 2.1.2 < 3"
       }
     },
-    "ignore-walk": {
-      "version": "3.0.1",
-      "resolved": "https://registry.npmjs.org/ignore-walk/-/ignore-walk-3.0.1.tgz",
-      "integrity": "sha512-DTVlMx3IYPe0/JJcYP7Gxg7ttZZu3IInhuEhbchuqneY9wWe5Ojy2mXLBaQFUQmo0AW2r3qG7m1mg86js+gnlQ==",
-      "requires": {
-        "minimatch": "^3.0.4"
-      }
-    },
     "in-publish": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/in-publish/-/in-publish-2.0.0.tgz",
@@ -1911,11 +1881,6 @@
       "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.3.tgz",
       "integrity": "sha1-Yzwsg+PaQqUC9SRmAiSA9CCCYd4="
     },
-    "ini": {
-      "version": "1.3.5",
-      "resolved": "https://registry.npmjs.org/ini/-/ini-1.3.5.tgz",
-      "integrity": "sha512-RZY5huIKCMRWDUqZlEi72f/lmXKMvuszcMBduliQ3nnWbx9X/ZBQO7DijMEYS9EhHBb2qacRUMtC7svLwe0lcw=="
-    },
     "inline-source-map-comment": {
       "version": "1.0.5",
       "resolved": "https://registry.npmjs.org/inline-source-map-comment/-/inline-source-map-comment-1.0.5.tgz",
@@ -2303,6 +2268,29 @@
       "resolved": "https://registry.npmjs.org/markdown-it-emoji/-/markdown-it-emoji-1.4.0.tgz",
       "integrity": "sha1-m+4OmpkKljupbfaYDE/dsF37Tcw="
     },
+    "markdown-it-linkify-images": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/markdown-it-linkify-images/-/markdown-it-linkify-images-1.1.0.tgz",
+      "integrity": "sha1-xVedk4bXcgxUbPWD/glq3FmAyFk="
+    },
+    "markdown-it-mark": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/markdown-it-mark/-/markdown-it-mark-2.0.0.tgz",
+      "integrity": "sha1-RqGqlHEFrtgYiXjgoBYXnkBPQsc="
+    },
+    "markdown-it-math": {
+      "version": "4.1.1",
+      "resolved": "https://registry.npmjs.org/markdown-it-math/-/markdown-it-math-4.1.1.tgz",
+      "integrity": "sha512-LQ0hREgMgN4tNcy2PGyw1XypjmKJjc+ZzATMuDIVD/Bagr5SGL198uHleVdiFDrNdXpqVmL4N1KD1GYyftMakQ==",
+      "requires": {
+        "ascii2mathml": "^0.6.2"
+      }
+    },
+    "markdown-it-smartarrows": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/markdown-it-smartarrows/-/markdown-it-smartarrows-1.0.1.tgz",
+      "integrity": "sha1-tXDpwP+YEuDbas4Zr6W6ErZLuac="
+    },
     "mdurl": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/mdurl/-/mdurl-1.0.1.tgz",
@@ -2398,30 +2386,6 @@
       "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
       "integrity": "sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ="
     },
-    "minipass": {
-      "version": "2.3.5",
-      "resolved": "https://registry.npmjs.org/minipass/-/minipass-2.3.5.tgz",
-      "integrity": "sha512-Gi1W4k059gyRbyVUZQ4mEqLm0YIUiGYfvxhF6SIlk3ui1WVxMTGfGdQ2SInh3PDrRTVvPKgULkpJtT4RH10+VA==",
-      "requires": {
-        "safe-buffer": "^5.1.2",
-        "yallist": "^3.0.0"
-      },
-      "dependencies": {
-        "yallist": {
-          "version": "3.0.3",
-          "resolved": "https://registry.npmjs.org/yallist/-/yallist-3.0.3.tgz",
-          "integrity": "sha512-S+Zk8DEWE6oKpV+vI3qWkaK+jSbIK86pCwe2IF/xwIpQ8jEuxpw9NyaGjmp9+BoJv5FV2piqCDcoCtStppiq2A=="
-        }
-      }
-    },
-    "minizlib": {
-      "version": "1.2.1",
-      "resolved": "https://registry.npmjs.org/minizlib/-/minizlib-1.2.1.tgz",
-      "integrity": "sha512-7+4oTUOWKg7AuL3vloEWekXY2/D20cevzsrNT2kGWm+39J9hGTCBv8VI5Pm5lXZ/o3/mdR4f8rflAPhnQb8mPA==",
-      "requires": {
-        "minipass": "^2.2.1"
-      }
-    },
     "mixin-deep": {
       "version": "1.3.1",
       "resolved": "https://registry.npmjs.org/mixin-deep/-/mixin-deep-1.3.1.tgz",
@@ -2503,31 +2467,6 @@
         }
       }
     },
-    "needle": {
-      "version": "2.3.1",
-      "resolved": "https://registry.npmjs.org/needle/-/needle-2.3.1.tgz",
-      "integrity": "sha512-CaLXV3W8Vnbps8ZANqDGz7j4x7Yj1LW4TWF/TQuDfj7Cfx4nAPTvw98qgTevtto1oHDrh3pQkaODbqupXlsWTg==",
-      "requires": {
-        "debug": "^4.1.0",
-        "iconv-lite": "^0.4.4",
-        "sax": "^1.2.4"
-      },
-      "dependencies": {
-        "debug": {
-          "version": "4.1.1",
-          "resolved": "https://registry.npmjs.org/debug/-/debug-4.1.1.tgz",
-          "integrity": "sha512-pYAIzeRo8J6KPEaJ0VWOh5Pzkbw/RetuzehGM7QRRX5he4fPHx2rdKMB256ehJCkX+XRQm16eZLqLNS8RSZXZw==",
-          "requires": {
-            "ms": "^2.1.1"
-          }
-        },
-        "ms": {
-          "version": "2.1.1",
-          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.1.tgz",
-          "integrity": "sha512-tgp+dl5cGk28utYktBsrFqA7HKgrhgPsg6Z/EfhWI4gl1Hwq8B/GmY/0oXZ6nF8hDVesS/FpnYaD/kOWhYQvyg=="
-        }
-      }
-    },
     "negotiator": {
       "version": "0.6.2",
       "resolved": "https://registry.npmjs.org/negotiator/-/negotiator-0.6.2.tgz",
@@ -2559,53 +2498,6 @@
         }
       }
     },
-    "node-pre-gyp": {
-      "version": "0.11.0",
-      "resolved": "https://registry.npmjs.org/node-pre-gyp/-/node-pre-gyp-0.11.0.tgz",
-      "integrity": "sha512-TwWAOZb0j7e9eGaf9esRx3ZcLaE5tQ2lvYy1pb5IAaG1a2e2Kv5Lms1Y4hpj+ciXJRofIxxlt5haeQ/2ANeE0Q==",
-      "requires": {
-        "detect-libc": "^1.0.2",
-        "mkdirp": "^0.5.1",
-        "needle": "^2.2.1",
-        "nopt": "^4.0.1",
-        "npm-packlist": "^1.1.6",
-        "npmlog": "^4.0.2",
-        "rc": "^1.2.7",
-        "rimraf": "^2.6.1",
-        "semver": "^5.3.0",
-        "tar": "^4"
-      },
-      "dependencies": {
-        "nopt": {
-          "version": "4.0.1",
-          "resolved": "https://registry.npmjs.org/nopt/-/nopt-4.0.1.tgz",
-          "integrity": "sha1-0NRoWv1UFRk8jHUFYC0NF81kR00=",
-          "requires": {
-            "abbrev": "1",
-            "osenv": "^0.1.4"
-          }
-        },
-        "tar": {
-          "version": "4.4.8",
-          "resolved": "https://registry.npmjs.org/tar/-/tar-4.4.8.tgz",
-          "integrity": "sha512-LzHF64s5chPQQS0IYBn9IN5h3i98c12bo4NCO7e0sGM2llXQ3p2FGC5sdENN4cTW48O915Sh+x+EXx7XW96xYQ==",
-          "requires": {
-            "chownr": "^1.1.1",
-            "fs-minipass": "^1.2.5",
-            "minipass": "^2.3.4",
-            "minizlib": "^1.1.1",
-            "mkdirp": "^0.5.0",
-            "safe-buffer": "^5.1.2",
-            "yallist": "^3.0.2"
-          }
-        },
-        "yallist": {
-          "version": "3.0.3",
-          "resolved": "https://registry.npmjs.org/yallist/-/yallist-3.0.3.tgz",
-          "integrity": "sha512-S+Zk8DEWE6oKpV+vI3qWkaK+jSbIK86pCwe2IF/xwIpQ8jEuxpw9NyaGjmp9+BoJv5FV2piqCDcoCtStppiq2A=="
-        }
-      }
-    },
     "node-sass": {
       "version": "4.12.0",
       "resolved": "https://registry.npmjs.org/node-sass/-/node-sass-4.12.0.tgz",
@@ -2678,20 +2570,6 @@
       "resolved": "https://registry.npmjs.org/normalize-path/-/normalize-path-3.0.0.tgz",
       "integrity": "sha512-6eZs5Ls3WtCisHWp9S2GUy8dqkpGi4BVSz3GaqiE6ezub0512ESztXUwUB6C6IKbQkY2Pnb/mD4WYojCRwcwLA=="
     },
-    "npm-bundled": {
-      "version": "1.0.6",
-      "resolved": "https://registry.npmjs.org/npm-bundled/-/npm-bundled-1.0.6.tgz",
-      "integrity": "sha512-8/JCaftHwbd//k6y2rEWp6k1wxVfpFzB6t1p825+cUb7Ym2XQfhwIC5KwhrvzZRJu+LtDE585zVaS32+CGtf0g=="
-    },
-    "npm-packlist": {
-      "version": "1.4.1",
-      "resolved": "https://registry.npmjs.org/npm-packlist/-/npm-packlist-1.4.1.tgz",
-      "integrity": "sha512-+TcdO7HJJ8peiiYhvPxsEDhF3PJFGUGRcFsGve3vxvxdcpO2Z4Z7rkosRM0kWj6LfbK/P0gu3dzk5RU1ffvFcw==",
-      "requires": {
-        "ignore-walk": "^3.0.1",
-        "npm-bundled": "^1.0.1"
-      }
-    },
     "npmlog": {
       "version": "4.1.2",
       "resolved": "https://registry.npmjs.org/npmlog/-/npmlog-4.1.2.tgz",
@@ -3147,17 +3025,6 @@
         "unpipe": "1.0.0"
       }
     },
-    "rc": {
-      "version": "1.2.8",
-      "resolved": "https://registry.npmjs.org/rc/-/rc-1.2.8.tgz",
-      "integrity": "sha512-y3bGgqKj3QBdxLbLkomlohkvsA8gdAiUQlSBJnBhfn+BPxg4bc62d8TcBW15wavDfgexCgccckhcZvywyQYPOw==",
-      "requires": {
-        "deep-extend": "^0.6.0",
-        "ini": "~1.3.0",
-        "minimist": "^1.2.0",
-        "strip-json-comments": "~2.0.1"
-      }
-    },
     "read-pkg": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/read-pkg/-/read-pkg-1.1.0.tgz",
@@ -3389,11 +3256,6 @@
         }
       }
     },
-    "sax": {
-      "version": "1.2.4",
-      "resolved": "https://registry.npmjs.org/sax/-/sax-1.2.4.tgz",
-      "integrity": "sha512-NqVDv9TpANUjFm0N8uM5GxL36UgKi9/atZw+x7YFnQ8ckwFGKrl4xX4yWtrey3UJm5nP1kUbnYgLopqWNSRhWw=="
-    },
     "scss-tokenizer": {
       "version": "0.2.3",
       "resolved": "https://registry.npmjs.org/scss-tokenizer/-/scss-tokenizer-0.2.3.tgz",
@@ -3646,16 +3508,6 @@
       "resolved": "https://registry.npmjs.org/sprintf-js/-/sprintf-js-1.0.3.tgz",
       "integrity": "sha1-BOaSb2YolTVPPdAVIDYzuFcpfiw="
     },
-    "sqlite3": {
-      "version": "4.0.8",
-      "resolved": "https://registry.npmjs.org/sqlite3/-/sqlite3-4.0.8.tgz",
-      "integrity": "sha512-kgwHu4j10KhpCHtx//dejd/tVQot7jc3sw+Sn0vMuKOw0X00Ckyg9VceKgzPyGmmz+zEoYue9tOLriWTvYy0ww==",
-      "requires": {
-        "nan": "^2.12.1",
-        "node-pre-gyp": "^0.11.0",
-        "request": "^2.87.0"
-      }
-    },
     "sshpk": {
       "version": "1.16.1",
       "resolved": "https://registry.npmjs.org/sshpk/-/sshpk-1.16.1.tgz",
@@ -3746,11 +3598,6 @@
         "get-stdin": "^4.0.1"
       }
     },
-    "strip-json-comments": {
-      "version": "2.0.1",
-      "resolved": "https://registry.npmjs.org/strip-json-comments/-/strip-json-comments-2.0.1.tgz",
-      "integrity": "sha1-PFMZQukIwml8DsNEhYwobHygpgo="
-    },
     "sum-up": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/sum-up/-/sum-up-1.0.3.tgz",
diff --git a/package.json b/package.json
index 02b64d5..6aec647 100644
--- a/package.json
+++ b/package.json
@@ -20,6 +20,9 @@
     "js-yaml": "latest",
     "markdown-it": "^8.4.2",
     "markdown-it-emoji": "^1.4.0",
+    "markdown-it-mark": "^2.0.0",
+    "markdown-it-math": "^4.1.1",
+    "markdown-it-smartarrows": "^1.0.1",
     "morgan": "~1.9.1",
     "node-sass": "^4.12.0",
     "pg": "^7.11.0",
diff --git a/public/stylesheets/sass/bingo/style.sass b/public/stylesheets/sass/bingo/style.sass
index a8b1f55..88d0c3e 100644
--- a/public/stylesheets/sass/bingo/style.sass
+++ b/public/stylesheets/sass/bingo/style.sass
@@ -215,6 +215,7 @@ textarea
       height: calc(100% - 2.5rem)
       background-color: $primary
       overflow: auto
+      font-size: 0.8em
 
       .chatMessage
         display: list-item
@@ -230,6 +231,15 @@ textarea
           color: $inactive
           font-style: italic
 
+        .chatMessageContent
+          img
+            width: 100%
+            height: auto
+            transition-duration: 0.5s
+            border-radius: 0.5em
+          img:hover
+            border-radius: 0
+
     #chat-input
       width: 100%
       margin: 0 0 0 0
diff --git a/routes/bingo.js b/routes/bingo.js
index b14b677..06bb098 100644
--- a/routes/bingo.js
+++ b/routes/bingo.js
@@ -3,7 +3,14 @@ const express = require('express'),
     cproc = require('child_process'),
     fsx = require('fs-extra'),
     mdEmoji = require('markdown-it-emoji'),
-    md = require('markdown-it')().use(mdEmoji);
+    mdMark = require('markdown-it-mark'),
+    mdSmartarrows = require('markdown-it-smartarrows'),
+    mdMath = require('markdown-it-math'),
+    md = require('markdown-it')()
+        .use(mdEmoji)
+        .use(mdMark)
+        .use(mdSmartarrows)
+        .use(mdMath);
 
 const rWordOnly = /^\w+$/;
 
@@ -303,7 +310,8 @@ router.get('/', (req, res) => {
         if (bingoSessions[gameId] && !bingoSessions[gameId].finished) {
             bingoUser.game = gameId;
             let bingoSession = bingoSessions[gameId];
-            bingoSession.addUser(bingoUser);
+            if (!bingoSession.users[bingoUser.id])
+                bingoSession.addUser(bingoUser);
 
             if (!bingoUser.grids[gameId]) {
                 bingoUser.grids[gameId] = generateWordGrid([bingoSession.gridSize, bingoSession.gridSize], bingoSession.words);
diff --git a/views/bingo/bingo-layout.pug b/views/bingo/bingo-layout.pug
index 9549b96..e0c91ba 100644
--- a/views/bingo/bingo-layout.pug
+++ b/views/bingo/bingo-layout.pug
@@ -4,5 +4,6 @@ html
         title Bingo by Trivernis
         script(type='text/javascript', src='/javascripts/bingo-web.js')
         link(rel='stylesheet', href='/sass/bingo/style.sass')
+        base(target='_blank')
     body
         block content