I've been running World Cup prediction pools since 2006. It started with pen and paper, moved to Excel, and this year finally built a tool. No existing predictor followed FIFA's Annex C knockout logic with 495 permutations given the expanded format. So I built Mundialist. Predict all 104 group stage matches, build a proper knockout bracket, pick Golden Boot/Assist/Glove, back dark horses for bonus points, and compete in private leagues. Free. No ads. Picks lock June 11.