Name Fastest Shortest Total Acc. Ratio Difficulty Languages Ideas 0.18 1903 53 7 13% 7.5Hard en Shopping 0.15 811 1132 193 17% 5.5Hard en Stack Machine 0.02 1391 84 22 26% 6.4Hard en Tunnelling the Earth 0.00 293 158 101 64% 3.3Medium en