[iagno] Disallow some initial moves.

[Arnaud B. <arnaudb src gnome org>]

commit fa2d412e4abf91fc9872132ad044e030878367b2
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Tue Jun 4 15:07:33 2019 +0200

    Disallow some initial moves.

 src/computer-reversi.vala | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)
---
diff --git a/src/computer-reversi.vala b/src/computer-reversi.vala
index fd54575..ad4e1ea 100644
--- a/src/computer-reversi.vala
+++ b/src/computer-reversi.vala
@@ -309,7 +309,17 @@ private abstract class ComputerReversi : ComputerPlayer
         /* For the first/first two moves play randomly so the game is not always the same */
         if (g.n_tiles < move_randomly)
         {
-            random_select (g, out best_move);
+            if (size != 8)
+                random_select (g, out best_move);
+            else
+            {
+                do
+                {
+                    random_select (g, out best_move);
+                }
+                while ((best_move.x == 1 || best_move.x == 6)
+                    && (best_move.y == 1 || best_move.y == 6));
+            }
             return;
         }