EXPcalibur guide

Rewind a two-answer version of the Apex audit.

Find two audit answers in an exampleFind two audit answers in an exampleTHE REAL APEX CHECK HAS SIX ANSWERS; THESE SMALL NUMBERS SHOW THE METHODSTARTWanted result after subtracting known start and bias[18, 56]UNDO LOWERSecond slot: 56 − 2×18 = 20[18, 20]UNDO SCALEUndo ×3 and ×5; both factors are odd[6, 4]UNDO UPPERFirst slot: 6 − 4 = 2[2, 4]Check forward: [2, 4] → [6, 4] → [18, 20] → [18, 56].

Start with the wanted pair after removing the known start and bias. Undo the lower mix, undo the odd multipliers, then undo the upper mix. The result is the pair to put in the setup cells. The real audit has six answers and one extra shuffle.