Railway Deck #219571 — Yu-Gi-Oh! Master Duel

Railway (Master Duel) — Deck Power Evaluation

Final Contextual Deck Power: 38/100 (±8 · Confidence: Low)

• Primary strategy: Combo
• Secondary strategies: Midrange, Blind-Second OTK
• Format: master-duel

Legality

Main 44 / Extra 15 / Side 0 — status: Illegal. 3 violation(s).

Identity & game plan

• Win condition: Xyz summon large Machine bosses (Gustav Max, Juggernaut Liebe) and swing for damage via repeated attacks; Going-second OTK by breaking opponent board and deploying 6000+ ATK beaters
• Turn 1 (going first): Summon Level 10 trains, build 1–2 Xyz monsters with negation/protection, set interaction
• Turn 2 (going second): Use hand traps and removal to clear opponent board, summon Level 4/10 trains for Xyz access, attack for lethal
• Recovery: Revolving Switchyard and Flying Pegasus Railroad Stampede recursion; limited backup lines after disruption
• After siding: Unable to verify; no side deck supplied (Master Duel format allows 0-15 side cards)

Why it scores here

This deck is **Illegal in Master Duel** and receives a capped, structural-only evaluation. It runs 3× Maxx "C", 2× Called by the Grave, and 2× PSY-Framegear Gamma, all exceeding their copy limits (1, 1, 1 respectively). Mechanically, the deck aims to open Train Xyz bosses with redundant starters (Flying Pegasus Railroad Stampede, Super Express Bullet Train, Heavy Freight Train Derricrane) and generate interaction through hand traps and removal. However, the core Train engine is incomplete: it lacks Gustav Max, Ironwolf, Exceptional Schedule, and other 100%-inclusion staples, and the Sky Striker splice is thin. Combo evidence is absent, so the ceiling is inferred from text alone. The deck's going-second pressure (Lightning Storm, Forbidden Droplet, going-first Xyz boards) provides some floor, but opening-hand consistency is hampered by copy conflicts and non-archetype filler. **This evaluation is structural only; the deck cannot be played legally in Master Duel.**

Dimension scores

How the score was computed

Strategy profile: 70% Combo / 30% Blind-Second. Structural ≈ 46, Going First ≈ 48, Going Second ≈ 58, Meta = provisional, Tournament Reliability ≈ 42. Modifiers: Illegal Deck Penalty (-8); Missing Core Engine Cards (-5); No Combo Evidence (-3); Sky Striker Splice Inefficiency (-2). Final formula: Capped at ~38 due to Illegal status. No metagame sample supplied; Meta = null/Provisional. Formula: 0.60·Structural + 0.40·TournamentReliability − 8 (banlist violation penalty) = ~38.

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.96 · key two-card combo ≈ — · full-brick estimate ≈ 0.04 (all Inferred)
• Combo output: best PowerIndex —, median —, board-per-starter —
• Turn order: 0 going-first lines vs 0 going-second lines

Strengths

• Strong going-second game via Lightning Storm, Forbidden Droplet, and going-first Xyz boards with layered negation.
• High starting consistency for opening at least one Train starter (96% probability).
• Recursion via Flying Pegasus Railroad Stampede and Revolving Switchyard enables follow-up plays.
• Hand-trap density (Maxx "C", PSY-Framegear Gamma/Delta) provides disruption on both turns.
• Large boss monsters (6000+ ATK Juggernaut Liebe) can close games in 1–2 attacks.

Weaknesses

• **Illegal in Master Duel**: exceeds copy limits on 3 cards (Maxx "C" ×3, Called by the Grave ×2, PSY-Framegear Gamma ×2). Deck cannot be registered or played.
• Severely incomplete core engine: missing 16/25 archetype staples (Gustav Max, Ironwolf, Exceptional Schedule, Juggernaut Liebe, etc.). Core presence only 36%.
• No combo evidence; floor and median output are inferred from text, creating high evaluation uncertainty.
• Single-point-of-failure going-first: if starter is disrupted early, recovery is thin (only 2 independent lines).
• Sky Striker splice is thin (11 cards) and adds conditional interaction (Widow Anchor requires empty Main Monster Zone). Low synergy with Train engine.
• No side deck (0 cards) limits post-match adaptability.
• 44-card main deck is bloated; excessive Spell density (25/44 = 57%) reduces monster consistency.

Critical choke points

• Copy-limit violations make the deck illegal; cannot be remedied without rebuilding to -3 Maxx "C", -1 Called by the Grave, -1 PSY-Framegear Gamma.
• Missing core cards (Gustav Max, Ironwolf, Exceptional Schedule) are irreplaceable; rebuilding requires ~15 additional slots.
• PSY-Framegear Gamma at 2 copies is a conditional hand trap requiring opponent monster effect activation; if opponent is empty-board combo, Gamma does not activate.
• Recursion loops (Stampede, Revolving Switchyard) rely on Level 10 monsters being sent to GY; if those are disrupted before summon, recovery breaks.
• No worked combo lines; actual median board power is unknown, leaving ceiling and floor estimates speculative.

Recommended changes

Evidence & confidence

• Verified: Deck legality status: Illegal (3 copy violations confirmed against Master Duel banlist).; Main deck size: 44 cards (exceeds Master Duel standard 40).; Extra Deck breakdown: 9 XYZ, 5 Link, 1 Synchro (verified from card list).; Archetype core present: 9/25 100-or-50% inclusion cards confirmed in deck.; Role tags: 16 negation-text, 13 removal-text, 5 hand-trap cards present.
• Observed: P(≥1 Train starter in opening hand 5) ≈ 96% from hypergeometric draw odds (archetype core group: 20 copies, P ≈ 0.96).; Usage statistics show Railway core is 36% present in this deck vs typical Railway shell.; Guides indicate Railway is strong on T2 and can close via high-ATK beaters and repeated attacks.
• Inferred: D1 (consistency) ≈ 42: starter probability is 96%, but 3× Maxx "C" and 2× Gamma redundancy creates brick risk; legal cull to -3/-1/-1 will recover to ~65–70.; D2 (brick management) ≈ 38: 25 Spells (57% density) and conflicting copy limits suggest 35–40% brick estimate on 5-card hand.; D3 (combo ceiling) ≈ 55: text reads 1–2 Xyz bosses (6000 ATK beater + 1–2 negations/removal); no combo logs, so inferred from card text.; D4 (median) ≈ 48: without combo evidence, median estimated at 1 Xyz + 1–2 interactions per turn; likely sustainable but not explosive.; D5 (interruption resilience) ≈ 40: only 2 independent lines (Trains + Sky Striker Widow), with recursion as single escape route. After one negate, recovery is thin.; D6 (resource economy) ≈ 50: Tokusano Shinkyojin, Engage, Juggernaut Liebe detach sustain; estimated net +0 to +1 per cycle.; D7 (interaction) ≈ 52: 16 negation-text + 13 removal-text cards; Widow Anchor conditional; interaction density moderate (~2–3 per board).; D8 (going-second) ≈ 58: Lightning Storm + Forbidden Droplet + going-first Xyz enable realistic T2 clear and lethal setup.; D9 (closing) ≈ 62: 3000–6000 ATK bosses can win in 2–3 attacks; stat-based closure is reliable.; D10 (main efficiency) ≈ 35: 44-card main is bloated; 57% Spells dilutes monster draw; core only 36% present.; D11 (extra) ≈ 55: 15-slot Extra is fully allocated; Xyz bosses + Strikers cover summon types; no flex but adequate coverage.; D12 (side) ≈ 0: 0 side cards in list; no post-side plan exists.; D13 (matchup) ≈ 35: no dated meta sample; Railway popularity is unknown in Master Duel context. Format speed / banlist fit are inferred from mechanical strength.; D14 (pilotability) ≈ 45: Xyz summoning is moderate-complexity; PSY-Frame fork adds decision point; moderate error tolerance estimated due to absent combo logs.
• Provisional: Meta Power: null. No dated metagame sample supplied; archetype meta-share in Master Duel is unknown.; Tournament reliability: 42 (estimated). Based on opening stability (D1/D2) and post-disruption recovery (D5), with penalty for thin lines.; D13 (matchup fit): Provisional. Railway mechanical strength is evident, but Master Duel format environment is not quantified.
• Data gaps: Deck is Illegal; evaluation is structural-only and cannot translate to playability. No combos supplied; combo floor/median/ceiling are inferred from card text alone. No tournament link; archetype meta-share and per-pilot match record are absent. No win-rate telemetry (going-first/second, matchup, game-level, brick/starter rates) — all signals are Inferred or Unknown. No side deck (0 cards); post-side performance is unmeasurable. Master Duel meta context is absent; format speed and common interactions are unknown. No worked example hands or lines; complexity and error tolerance are estimated.