diff --git a/README.md b/README.md
index 5847085..dc5e17b 100644
--- a/README.md
+++ b/README.md
@@ -23,3 +23,11 @@ Source: https://www.programmfabrik.de/en/assignment-frontend-backend-developer-j
 >
 > *    Implement in C++, so that i works on the command line under Linux
 > *    The opponent has to be unbeatable
+
+# Solution
+
+## Time spent
+
+* ~0.5 hours to set up the project;
+* ~4.5 hours to implement game board serialization, tic-tac-toe rules and game solver (with tests);
+* ...