diff --git a/src/components/BinarySearchTrick.tsx b/src/components/BinarySearchTrick.tsx
index 444505a..0dd4114 100644
--- a/src/components/BinarySearchTrick.tsx
+++ b/src/components/BinarySearchTrick.tsx
@@ -123,6 +123,11 @@ const BinarySearchTrick = ({ showSocialShare = true }: BinarySearchTrickProps) =
 
   // Check if at least one card has been selected (present or absent)
   const hasAnySelection = Object.values(cardStates).some(state => state !== 'unselected');
+  
+  // Check if all cards have been committed to in one-by-one mode
+  const allCardsCommitted = isOneByOne 
+    ? cards.every(card => cardStates[card.id] && cardStates[card.id] !== 'unselected')
+    : hasAnySelection;
 
   // Get cards to display based on mode
   const getDisplayCards = () => {
@@ -315,7 +320,7 @@ const BinarySearchTrick = ({ showSocialShare = true }: BinarySearchTrickProps) =
         <div className="flex gap-4">
           <Button 
             onClick={calculateResult}
-            disabled={!hasAnySelection}
+            disabled={!allCardsCommitted}
             size="lg"
             className="min-w-32"
           >