diff --git a/src/gui/welcomescreen.cpp b/src/gui/welcomescreen.cpp
--- a/src/gui/welcomescreen.cpp
+++ b/src/gui/welcomescreen.cpp
@@ -157,6 +157,7 @@
 	if(!variant) return;
 	
 	Game game = variant->createGame(difficulty(), 0);
+	if(!game.isValid()) return;
 
 	emit newGameStarted(game, variant);
 }
@@ -166,6 +167,7 @@
 	if(!variant) return;
 
 	Game game = variant->createGame(difficulty(), symmetry());
+	if(!game.isValid()) return;
 
 	// Save the selected puzzle configuration.
 	QModelIndex index = gameListWidget->currentIndex();