Column 4 has 1 bead. Column 1 has 1 bead. Same depth → red (=). In this engine-verified Cockroach Pig (曱甴路 (Gaat Jaat Lou)) walkthrough, we inspect Mark #1 at Big Road Column 5, Row 1 (looking 3 columns back to Column 1) and trace every step through describeMarkSteps().
RW-CP-R1-RED (Cockroach Pig, Lookback 3): Mark #1 at Big Road Column 5, Row 1 → Column 4 has 1 bead. Column 1 has 1 bead. Same depth → red (=).
Column 4 has 1 bead. Column 1 has 1 bead. Same depth → red (=).
Common table reading watchout: Comparing the wrong columns. Compare Column 4, the one that just finished, with Column 1.
Compares Big Road columns separated by 3 columns.
Triggers Rule 1 (Starting a New Column).
Rendered with crisp SIGNAL white (#F4F5F6) lookback boxes.
Steps: 1. Column 5 starts, so use Rule 1: compare Column 4 with Column 1, 3 columns further back. 2. Column 4 has 1 bead. Column 1 has 1 bead. Same depth → red (=).
Next-hand probe on this board: If B → -, If P → -.
When a new Big Road column starts at Row 1 (from Column 5 onward), Cockroach Pig applies Rule 1 with lookback 3: compare the column that just finished (`Column C - 1`) with the column 3 positions further back (`Column C - 4`).
In `BPPBBBPB...`, Column 1 has 1 bead (`B`), Column 2 has 2 beads (`PP`), Column 3 has 3 beads (`BBB`), and Column 4 has 1 bead (`P`). Because Column 4 stopped at 1 bead, Cockroach Pig did not start in Column 4. When Hand 8 starts Column 5 at Row 1 (`B`), Rule 1 compares Column 4 (1 bead) with Column 1 (3 columns further back, 1 bead). Both have 1 bead → Same depth → Red (=) slash!
Our locked road engine summarizes this exact mark in two steps: 1. Column 5 starts, so use Rule 1: compare Column 4 with Column 1, 3 columns further back. 2. Column 4 has 1 bead. Column 1 has 1 bead. Same depth → red (=).
| Derived Mark | Big Road Position | Rule Applied | Verdict | describeMark() Explanation |
|---|---|---|---|---|
| Mark #1 (Featured) | Col 5, Row 1 | Rule 1 (New Column) | Red (=) | Column 4 has 1 bead. Column 1 has 1 bead. Same depth → red (=). |
| Mark #2 | Col 6, Row 1 | Rule 1 (New Column) | Blue (≠) | Column 5 has 1 bead. Column 2 has 2 beads. Different depth → blue (≠). |
| Mark #3 | Col 6, Row 2 | Rule 2 (Continue Down) | Red (=) | This bead is at Row 2. Column 3 has a bead at Row 2 too → red (=). |
| Mark #4 | Col 6, Row 3 | Rule 2 (Continue Down) | Red (=) | This bead is at Row 3. Column 3 has a bead at Row 3 too → red (=). |
| Mark #5 | Col 7, Row 1 | Rule 1 (New Column) | Red (=) | Column 6 has 3 beads. Column 3 has 3 beads. Same depth → red (=). |
| Mark #6 | Col 7, Row 2 | Rule 2 (Continue Down) | Blue (≠) | This bead is at Row 2. Column 4 stopped at Row 1, one row above → blue (≠). |
This example shows why counting carefully matters on Cockroach Pig: at Column 5 Row 1, the finished column is Column 4, and 3 columns further back from Column 4 is Column 1 (`4 - 3 = 1`).
Across the full 34-hand board for RW-CP-R1-RED, Cockroach Pig records 27 total marks (14 Red = and 13 Blue ≠). Remember that each hand in an 8-deck shoe is an independent event and derived roads describe past column symmetry rather than predicting the next winner.
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About 64 minutes of lessons covering outcomes, the Bead Plate, Big Road columns, and dragon tails.
Train Third-Card Rule decisions, depth counting, lookback column references, and derived-road speed recognition.
Visual step-by-step breakdowns with closed captions, chapter markers, and full searchable transcripts.
Macau Cantonese, French, and mathematical table terms explained in plain English with road diagrams.
Direct answers to real student questions on dragon tails, tie handling, lookback rules, and table variants.
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