diff --git a/game.html b/game.html
index a0fbe68..ecaee56 100644
--- a/game.html
+++ b/game.html
@@ -27,16 +27,16 @@
 
         <div v-show="isGameStarted" v-for="r in rounds">
                 Tief:
-                <span v-for="pos in r.tief">{{ pos }}</span>
+                <span class="border border-primary rounded-circle" v-for="pos in r.tief">{{ pos }}</span>
                 Police:
-                <span v-for="pos in r.police">{{ pos }}</span>
+                <span class="border border-primary rounded-circle" v-for="pos in r.police">{{ pos }}</span>
                 Transport:
                 <span>{{ r.transport }}</span>
         </div>
         <div v-show="isGameStarted">
             <form v-on:submit.prevent="gameRound" name="form_move">
                 Tief:
-                <span v-for="pos in round.tief">{{ pos }}</span>
+                <span class="border border-primary rounded-circle" v-for="pos in round.tief">{{ pos }}</span>
                 Police:
                 <input v-for="(police, index) in round.police" v-model="round.police[index]" type="number" min="1" max="199"  required name="police">
                 Transport:
@@ -86,9 +86,25 @@
                         'police': this.round.police.slice(),
                     })
                     // clear values
+
+                    let tief = new Array()
+                    for (vertex in this.round.tief) {
+                        let tief_pos = this.round.tief[vertex]
+                        // iterate edges
+                        for (edge in this.graph[tief_pos].siblings) {
+                            let sibbling = this.graph[tief_pos].siblings[edge]
+                            if (this.round.police.includes(sibbling.vertex)) {
+                                console.log("skip vertex, police there")
+                            } else if (sibbling.edge == this.round.transport) {
+                                tief.push(sibbling.vertex)
+                            } else if (this.round.transport == 'hidden') {
+                                tief.push(sibbling.vertex)
+                            }
+                        }
+                    }
                     this.round.police = new Array(this.police_players).fill(0);
                     this.round.transport = null
-                    this.round.tief.push(4)
+                    this.round.tief = new Set(tief)
                 },       
                 listPossibleTransports(round) {
                     let values = []