K9 Deck #773933 — Yu-Gi-Oh! Master Duel

Deck — Deck Power Evaluation

Final Contextual Deck Power: 56/100 (±7 · Confidence: Medium)

• Primary strategy: Midrange
• Secondary strategies: Toolbox
• Format: master-duel

Legality

Main 40 / Extra 15 / Side 0 — status: Legal.

Identity & game plan

• Win condition: Level-5 and Level-4 board development from K9 and Vanquish Soul monsters into Xyz/Link boards, closed by high-ATK attackers (Vanquish Soul Caesar Valius 3000 ATK, Vanquish Soul Heavy Borger 2500 ATK, K9-66a Jokul 2000 ATK) (Inferred from card text and stats); Vanquish Soul Jiaolong and Razen board presence with Link and Xyz monsters from the Extra Deck as follow-up pressure (Inferred)
• Turn 1 (going first): Hold Ash Blossom and Ghost Belle for the opponent's first activation while a searcher (Vanquish Soul Dr. Mad Love, K9-66a Jokul, or Vanquish Soul Razen) adds the next engine piece; Normal Summon K9-17 Izuna or K9-04 Noroi without Tribute when the opponent holds 2 or more cards, then build a Link or Xyz board (Inferred from text)
• Turn 2 (going second): Six-card hand with 8 hand-trap copies (about 76% chance of at least one hand trap) to stop the opponent's first summon or search, using Droll & Lock Bird and Maxx "C" to shut down the draw and search chain while the Vanquish Soul board is rebuilt (Inferred)
• Recovery: 14 searcher-text copies and the Vanquish Soul monsters' own add-to-hand and Special Summon effects rebuild the engine after one interruption; recovery depth is text-derived and unmeasured (Inferred)
• After siding: None. The deck has no side deck (0 cards), so no post-side plan is available to evaluate.

Why it scores here

The deck reliably opens an engine: 14 searcher-text copies give about a 0.90 chance of at least one starter in a five-card opening hand, and the two-archetype core (K9 and Vanquish Soul) gives several independent first-turn routes. Its strongest scoring factor is interaction on the system, not on individual cards: eight hand-trap copies (Ash Blossom, Ghost Belle, Droll & Lock Bird, Maxx "C") make it hard to stop on the way in and give it a strong going-second plan. Conversion is only moderate because no recorded boards exist, so the ceiling and median are inferred from card text and stats, and the closing power is capped by a 3000-ATK ceiling and Extra Deck slots that depend on conditional summon routes. Popularity and archetype usage stats confirm the list is real and accessible, but they earned no points on their own. The score was not produced by averaging card scores; it comes from consistency, interaction, and structural coherence, reduced for the empty side deck and the split engine.

Dimension scores

How the score was computed

Strategy profile: Midrange. Structural ≈ 62.4, Going First ≈ 64, Going Second ≈ 68, Meta = provisional, Tournament Reliability ≈ 60. Modifiers: engine conflict between K9 and Vanquish Soul (-3); conditional-only Extra Deck routes (-2); empty side deck (-2); banlist exposure (-1); hand-trap density (2). Final formula: 0.80*Structural + 0.20*TournamentReliability + ContextModifiers (-6) = 0.80*62.4 + 0.20*60 - 6 ≈ 56 (Meta provisional, no dated sample)

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.9 · key two-card combo ≈ — · full-brick estimate ≈ — (all Inferred)
• Combo output: best PowerIndex —, median —, board-per-starter —
• Turn order: 0 going-first lines vs 0 going-second lines

Strengths

• 14 searcher-text copies give a high chance of a live starter in the opening hand
• 8 hand traps (Ash Blossom, Ghost Belle, Droll & Lock Bird, Maxx "C") provide strong going-second interaction
• Compact 40-card main with 23 distinct cards and a clear archetype core
• Legal in Master Duel with all restricted cards within legal copy limits

Weaknesses

• No side deck, so the deck has no post-side adaptability
• Two archetype engines (K9 and Vanquish Soul) compete for hand space
• Several Extra Deck slots (Level 9 and Level 12 Xyz) need conditional summon routes
• No recorded combo boards, so the power ceiling is unverified

Critical choke points

• Opening hand with no searcher and no hand trap
• Single-copy 1-of techs (Maxx "C", Crossout Designator, Reinforcement of the Army, Stake your Soul!) that do not work in every hand
• Dependence on Level 5 materials for most Xyz lines

Recommended changes

Evidence & confidence

• Verified: Main 40, Extra 15, Side 0; Legal under master-duel rules (BanMasterDuel); Restricted cards: Limited ×4 at 1 copy each; Semi-Limited ×2 at 2 copies each; all within legal copies; Archetype spread: Vanquish Soul 18, K9 14, generic 17, Mulcharmy 3 (exact-name purity 25.5%); Hypergeometric probabilities for 5-card and 6-card hands computed from the resolved main deck
• Observed: K9 and Vanquish Soul usage stats show the archetype-standard core is present in this list (inclusion 64–100%)
• Inferred: Consistency: searcher density gives an estimated 0.90 starter-live rate in the opening 5; Going-second plan: 8 hand traps give a 0.76 hand-trap rate in the 6-card opening hand; Extra Deck routes: Level 9 and Level 12 Xyz summons depend on conditional alternate summons; Interaction breadth: negation and removal text counts indicate layered answers but are not measured
• Provisional: Meta Power (null): no dated metagame sample; Matchup fit and format fit (D13): no tournament link or meta-share context; Post-side plan (D12): no side deck
• Data gaps: no combos supplied: combo floor, median and ceiling are text-only inference no tournament link: archetype meta-share and per-pilot match record absent no side deck: post-side adaptability cannot be assessed usage_statistics in_this_deck flags conflict with the cards list for several Extra Deck cards (for example Number 104: Masquerade and K9-66X "Jacks" are listed as in-deck in cards but marked not in deck in usage); cards list was trusted because the Extra count of 15 matches it no win-rate telemetry exists in YGOVN: going-first/second split, matchup results and brick rate are Inferred or Unknown Meta Power is Provisional unless a dated metagame sample is supplied