diff --git a/src/arenas/tictactoe/style.css b/src/arenas/tictactoe/style.css
index e69de29..fd03b53 100644
--- a/src/arenas/tictactoe/style.css
+++ b/src/arenas/tictactoe/style.css
@@ -0,0 +1,5 @@
+td {min-width: 10px; height: 10px;}
+.cellj0{border-bottom: 1px dotted black;}
+.cellj2{border-top:1px dotted black;}
+.celli0{border-right:1px dotted black;}
+.celli2{border-left:1px dotted black;}
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