DR250 pairs Double-Jump 2x2 Symmetry (BB-PP-BB-PP columns of depth 2 across Big Road cols 1-4) with Analytical Modality (Depth Vector Verification): learners verify Row 1 marks red via d_{k-1}=2; Row 2 marks red via occupied (k-m,2), master Rule 1 Depth-2 Equality Paired with Rule 2 Case 2a Filled Cell, and eliminate thinking row 2 of a 2x2 pattern turns blue before the column switches.
DR250 drill board (PPBBBPPPPBBPBBBBBBPPPBP): 9 Big Road columns, 20 Big Eye Boy, 17 Small Road, and 13 Cockroach Pig marks.
This bead is at Row 3. Column 1 stopped at Row 2, one row above → blue (≠).
Common table reading watchout: Thinking "no bead at this row" means blue. It is blue only when Column 1 stopped exactly one row above this bead.
This bead is at Row 2. Column 1 has a bead at Row 2 too → red (=).
Common table reading watchout: Thinking "no bead at this row" means blue. It is blue only when Column 1 stopped exactly one row above this bead.
This bead is at Row 2. Column 3 has a bead at Row 2 too → red (=).
Common table reading watchout: Thinking "no bead at this row" means blue. It is blue only when Column 3 stopped exactly one row above this bead.
BB-PP-BB-PP columns of depth 2 across Big Road cols 1-4
Rule 1 Depth-2 Equality Paired with Rule 2 Case 2a Filled Cell
Row 1 marks red via d_{k-1}=2; Row 2 marks red via occupied (k-m,2)
Thinking Row 2 of a 2x2 pattern turns blue before the column switches
Trace both Row 1 (Rule 1) and Row 2 (Rule 2 Case 2a) in a 2x2 shoe by computing the full column-depth vector [d_1, d_2, ..., d_k] across the shoe
Verification lab DR250 pairs Analytical Depth Audit with Double-Jump 2x2 Symmetry so students test BB-PP-BB-PP columns of depth 2 across Big Road cols 1-4 and answer: How does the depth vector [d_1..d_k] determine all three derived roads?
Scoreboard inspection DR250 (Double-Jump 2x2 Symmetry · Analytical Depth Audit) shows: This bead is at Row 3. Column 1 stopped at Row 2, one row above → blue (≠). Tracking 17 Small Road and 13 Cockroach Pig marks answers How does the depth vector [d_1..d_k] determine all three derived roads?
| DR250 Drill Dimension | Coordinate / Rule | GMU Modality Action |
|---|---|---|
| DR250 Matrix Coordinate | BB-PP-BB-PP columns of depth 2 across Big Road cols 1-4 | Analytical Modality (Depth Vector Verification) |
| DR250 Rule & Depth | Rule 1 Depth-2 Equality Paired with Rule 2 Case 2a Filled Cell | Row 1 marks red via d_{k-1}=2; Row 2 marks red via occupied (k-m,2) |
| DR250 Diagnostic Target | Thinking Row 2 of a 2x2 pattern turns blue before the column switches | Trace both Row 1 (Rule 1) and Row 2 (Rule 2 Case 2a) in a 2x2 shoe |
Second-lookback check DR250 states: This bead is at Row 2. Column 1 has a bead at Row 2 too → red (=). By computing the full column-depth vector [d_1, d_2, ..., d_k] across the shoe, learners master Double-Jump 2x2 Symmetry and Row 1 marks red via d_{k-1}=2; Row 2 marks red via occupied (k-m,2) over 9 columns.
Enter any sequence to inspect the Big Road, Big Eye Boy, Small Road, Cockroach Pig, and next-hand previews.
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.
Every reference guide, glossary definition, and road calculator on Baccarat Smart is open for everyone. When you want all 6 modules and 36 lessons (about 5.5 hours of lessons) organized in structured step-by-step order with 74 hands-on boards, 94 quiz checks along the way, and Cloud Shoe Log sync across web, iPhone, and Android, start Module 1 (10 lessons, about 64 minutes of lessons) free or unlock full membership for $25 a month.
Test any shoe sequence and inspect Rule 1 and Rule 2 derived road marks.
Review the 5-road architecture from Bead Plate and Big Road to Cockroach Pig.
Practice companion coordinate lookups, depth comparisons, and rule checks.
Practice companion coordinate lookups, depth comparisons, and rule checks.