diff --git a/server/src/schema/mutations/AddRuleToCompetition.js b/server/src/schema/mutations/AddRuleToCompetition.js
new file mode 100644
index 000000000..a165940df
--- /dev/null
+++ b/server/src/schema/mutations/AddRuleToCompetition.js
@@ -0,0 +1,54 @@
+import {
+  GraphQLNonNull,
+  GraphQLID,
+  GraphQLString
+} from 'graphql'
+import { CompetitionType } from '../types'
+import Competition from '../../models/competition'
+
+const args = {
+  codeName: { type: new GraphQLNonNull(GraphQLID) },
+  title: { type: new GraphQLNonNull(GraphQLString) },
+  description: { type: new GraphQLNonNull(GraphQLString) }
+}
+
+const resolve = (parent, args, context) => {
+  // let authIdOnSession = context.user.sub
+  return new Promise((resolve, reject) => {
+    Competition.findOne({ codeName: args.codeName }).exec((err, competition) => {
+      if (err) reject(err)
+      else {
+        if (competition.rules.some(rule => rule.title === args.title)) {
+          // need to add an error message here TODO
+          resolve(competition)
+        } else {
+          let number = 1
+          while (competition.rules.some(rule => rule.number === number)) {
+            number++
+          }
+          competition.rules.push({
+            number,
+            title: args.title,
+            description: args.description
+          })
+          competition.save((err) => {
+            if (err) reject(err)
+            else {
+              resolve(competition)
+            }
+          })
+        }
+      }
+    })
+  })
+}
+
+const mutation = {
+  addRuleToCompetition: {
+    type: CompetitionType,
+    args,
+    resolve
+  }
+}
+
+export default mutation
diff --git a/server/src/schema/mutations/index.js b/server/src/schema/mutations/index.js
index 372c2c3a6..ba6d90418 100644
--- a/server/src/schema/mutations/index.js
+++ b/server/src/schema/mutations/index.js
@@ -4,12 +4,14 @@ import {
 
 import HostCompetitionMutation from './HostCompetition'
 import RegisterToCompetitionMutation from './RegisterToCompetition'
+import AddRuleToCompetitionMutation from './AddRuleToCompetition'
 
 const Mutation = new GraphQLObjectType({
   name: 'Mutation',
   fields: Object.assign(
     HostCompetitionMutation,
-    RegisterToCompetitionMutation
+    RegisterToCompetitionMutation,
+    AddRuleToCompetitionMutation
   )
 })