diff --git a/static/css/adc2019.css b/static/css/adc2019.css
index 078db367f6e6f66f1088f723a76208eea38f28e4..db78001dfae6f1b421f40b15bba1646748c34eaa 100644
--- a/static/css/adc2019.css
+++ b/static/css/adc2019.css
@@ -37,11 +37,22 @@ body{
 
 #problem-list-container tr.problem-row.q-selected{
     background-color: rgba(200, 100, 100, .3);
+    border: 2px solid #888;
 }
 #problem-list-container tr.problem-row:hover{
     background-color: rgba(200, 100, 100, .15);
 }
 
+#problem-list-container tr.problem-row.solution-tried{
+    background-color: rgba(200, 200, 100, 0.3);
+}
+#problem-list-container tr.problem-row.solution-solved{
+    background-color: rgba(100, 200, 200, 0.3);
+}
+#problem-list-container tr.problem-row.solution-saved{
+    background-color: rgba(100, 200, 100, 0.3);
+}
+
 #client-control-pane{
     height: calc(100vh - 20px);
     overflow-y: scroll;
diff --git a/templates/part_problem_status.html b/templates/part_problem_status.html
index 8aa0c245c4a179a283f493a342969e38163dd7b5..89ebf3e1a16b27a26d50672de1bd4c3b05efcd40 100644
--- a/templates/part_problem_status.html
+++ b/templates/part_problem_status.html
@@ -25,9 +25,7 @@
             {% set tr_class = '' %}
             {% set tr_class = tr_class + ' submit-solution' if k == problem.best_solution else '' %}
             {% set tr_class = tr_class + ' valid-solution' if v.is_valid_solution() else '' %}
-            {#% else %#}
             <tr class="solution-detail-row {{tr_class}}" data-solution-id="{{k}}" data-problem="{{problem.name}}">
-            {#% endif %#}
                 <td>{{v.timestamp_str}}</td>
                 <td>{{v.worker}}</td>
                 <td>
diff --git a/templates/part_problems.html b/templates/part_problems.html
index 3de937c8420a1905546f5a21818498727ea3613e..c44b4c1ea6f427e52d78857fd507f5a1535acb7f 100644
--- a/templates/part_problems.html
+++ b/templates/part_problems.html
@@ -12,10 +12,18 @@
     </thead>
     <tbody>
         {% for k, v in problems.items() %}
-        <tr class="problem-row" data-problem="{{v.name}}">
+        {% set tr_class = '' %}
+        {% if v.status == 'Saved' %}
+            {% set tr_class = 'solution-saved' %}
+        {% elif v.status.startswith('Solved') %}
+            {% set tr_class = 'solution-solved' %}
+        {% elif v.status.startswith('Tried') %}
+            {% set tr_class = 'solution-tried' %}
+        {% endif %}
+        <tr class="problem-row {{tr_class}}" data-problem="{{v.name}}">
             <td class="large-cell">{{v.name}}</td>
             <td class="small-cell">
-                {{v.size_str}}<br />
+                {{v.size_str}} [{{'{:,.1f}%'.format(v.filling_rate * 100)}}]<br />
                 {{v.block_num}} /
                 {{v.line_numbers | length - 1}} /
                 {{v.block_groups | length}}
diff --git a/utils/data.py b/utils/data.py
index 1ffec028b171009130b14d14dd4eda80f416a114..177f51777bd302c1d5d6813acb93e4086fe8f2cd 100644
--- a/utils/data.py
+++ b/utils/data.py
@@ -15,8 +15,8 @@ class Problem(object):
         self.size = (0, 0)
         self.block_num = 0
         self.blocks = dict()
+        self.tile_num = 0
         self.problem = ''
-        # self.status = 'Ready'
         self.solutions = dict()
         self.solution_path = solution_path
         self.best_solution = None
@@ -29,6 +29,17 @@ class Problem(object):
     @property
     def size_str(self):
         return f'{self.size[0]}X{self.size[1]}'
+    
+    @property
+    def board_area(self):
+        return self.size[0] * self.size[1]
+
+    @property
+    def filling_rate(self):
+        if self.board_area == 0:
+            return 0
+        else:
+            return self.tile_num / self.board_area
 
     @property
     def problem_text(self):
@@ -91,6 +102,8 @@ class Problem(object):
         block_num = 0
         blocks = dict()
 
+        tile_num = 0
+
         def intplus(v):
             if v.isdecimal():
                 return int(v)
@@ -133,6 +146,7 @@ class Problem(object):
                             if not _line_num in line_number_list:
                                 line_number_list.append(_line_num)
                             # _line_num = line_number_list.index(_line_num)
+                            tile_num += 1
 
                             # Make connection list
                             if not bi in block_to_line:
@@ -152,6 +166,7 @@ class Problem(object):
         self.size = board_size
         self.block_num = block_num
         self.blocks = blocks
+        self.tile_num = tile_num
         self.name = name
         self.problem = q_text
         self.line_numbers = line_number_list