Hatchetjon’s Faro Calculator

Format: AS,2S,3S,...,KS,AD,...,KD,AC,...,KC,AH,...,KH
Tip: Edit the deck freely, then apply any shuffle below.

Preset Stacks

Custom New Deck Builder

Suit Order: Reverse each suit (K-A)

Deck Cut

Cut after position

Track card: Position: —

Import deck (.txt)

Deck integrity No analysis yet.

Shuffle Controls

Perfect Faros Exact 50/50 splits

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Standard perfect out-faro: split into two equal halves and interlace starting with the top half so the top and bottom cards stay in place.

Magician’s in-faro: split evenly and interlace starting with the bottom half so the top card becomes second and the bottom card becomes second from bottom.

Reverse out-faro: reconstructs the original order that produced the current deck via a perfect out-faro.

Reverse in-faro: reconstructs the original order that produced the current deck via a perfect in-faro.

Monge-perfect variant: a deterministic Monge-style pattern designed to cycle cleanly.

Straddle Faros 27/25 & 25/27

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Left-straddle faro: uses a 27/25 split where an extra card from the top half is placed before the weave to create the straddle.

Right-straddle faro: uses a 25/27 split where an extra card from the bottom half is placed before the weave to create the opposite straddle.

Monge & Specialty Alternating & fancy

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Classic Monge: deal cards from the top, placing the first card to the bottom of a new pile, the next to the top, and continue alternating bottom and top placements.

Reverse Monge: deal from the top but start by placing the first card to the top of a new pile, then the next to the bottom, alternating in the opposite direction.

Horseshoe-style: cut the deck, reverse one half, then interlace — a rough simulation of the move.

Milk shuffle simulation: repeatedly take top and bottom cards as a pair to a new pile, then drop the middle.

Zarrow logic simulation: approximate the strip-out false shuffle as a deterministic permutation (no animation).

Imperfect Faros Custom splits

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Imperfect out-faro: use custom top and bottom packet sizes, then interlace starting with the top packet while preserving the chosen imbalance.

Imperfect in-faro: use custom packet sizes, then interlace starting with the bottom packet to simulate an in-faro with an intentional off-center split.

Top packet size Bottom packet size The two sizes must add up to the current deck size. Uneven splits are allowed for imperfect faros.

Analysis Tools Cycles & tracking

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Compute how many perfect out-faros it takes to return this deck to its starting order.

Compute how many perfect in-faros it takes to return this deck to its starting order.

Output & Analysis Live result

Cards: 0

Display layout:

Visual deck display

Shuffle history

Block Movement Analyzer

Shows how a block of cards (e.g. positions 10–20) moves, stays together, splits, or drifts after one shuffle.

Start pos End pos Shuffle

Select range and click Analyze Block

Return-to-Position Solver

Finds how many Out or In faros are needed to move a chosen card to a specific target position (card control tool).

Card Target pos Max steps

Enter card & target, then Solve Path

Cycle Compression Viewer

Breaks down the faro cycle into sub-cycles/orbits — shows which positions return together and after how many shuffles (group-theory view).

Click to analyze cycles

Faro Cycle Heatmap

Visual grid showing how quickly each position returns to its original spot after repeated Out-Faros (color-coded: fast = green, slow = red).

Faro Sensitivity Analyzer

Shows how a small off-by-one error in imperfect faro split size affects a tracked card's position — reveals stable vs sensitive spots.

Tracked card Base top size

Enter card & base split, then Analyze