first working prototype

api/templates/_guess_form.html

@@ -0,0 +1,11 @@
+<form action="{{ url_for('guess', player=player) }}" method="post">
+    {{ form.hidden_tag() }}
+    <p>
+        {{ form.guess.label }}:
+        {{ form.guess(size=15) }}
+        {% for error in form.guess.errors %}
+        <span style="color: red;">[{{ error }}]</span>
+        {% endfor %}
+        {{ form.submit() }}
+    </p>
+</form>