K9 Deck #773820 — Yu-Gi-Oh! Master Duel

Deck — Deck Power Evaluation

Final Contextual Deck Power: 56/100 (±6 · Confidence: Medium)

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

Legality

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

Identity & game plan

• Win condition: K9 Xyz bosses (K9-66X Jacks, K9-17 Ripper lines) and Vanquish Soul Level 5 to 8 beaters (Caesar Valius, Heavy Borger, Hollie Sue) converting board presence into attack.; Vanquish Soul hand-reveal recursion and Special Summon chains that keep producing bodies once the first board is established.
• Turn 1 (going first): Open on a Vanquish Soul or K9 searcher (Dr. Mad Love, Izuna, Jokul, Vanquish Soul Start!) to reach a Level 5 Xyz pair, then Xyz into K9 Ripper or Jacks while holding Ash Blossom for the opponent's first interaction.
• Turn 2 (going second): Hold Ash Blossom and Maxx C as hand traps against the opponent's first activation, then Special Summon Vanquish Soul monsters by revealing same-attribute monsters from hand to rebuild the board.
• Recovery: Search the next Vanquish Soul or K9 monster with the searchers (Razen, Jiaolong, Lantern, A Case for K9) and re-enter Level 5 materials, with K9-X Forced Release as a board-reset Xyz transfer.
• After siding: No side deck is registered, so no post-side plan exists; the deck plays the same 40 and 15 in every game.

Why it scores here

The deck is scored as a connected K9 and Vanquish Soul system, not as an average of its card scores. The archetype core group (22 copies) has about a 0.987 chance of at least one copy in a going-first opening hand, and 16 searcher-text cards give about a 0.935 chance of at least one searcher in hand, so the engine is reliably live on turns one and two. Interaction is layered across Ash Blossom, Maxx C, the Level 4 and 5 Xyz negators, and K9-66X Jacks, and the Level 5 Vanquish Soul bodies give consistent board presence. The score is pulled down by the lack of a side deck, by three Extra Deck cards (K9-X Werewolf, Divine Arsenal ZEUS, Super Starslayer TY-PHON) whose Level 9 or 12 material requirements are absent from the Main Deck, and by the absence of recorded combos, tournament data, and win-rate telemetry. Popularity in the K9 archetype usage stats confirms the list is real and accessible but did not add points.

Dimension scores

How the score was computed

Strategy profile: Midrange. Structural ≈ 64, Going First ≈ 72, Going Second ≈ 64, Meta = provisional, Tournament Reliability ≈ 61. Modifiers: Extra Deck cards gated by absent Level 9/12 materials (-3); No side deck (-3); Banlist exposure on key tech (-1). Final formula: 0.80*Structural + 0.20*TournamentReliability + ContextModifiers (Meta provisional, no dated meta sample)

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.99 · key two-card combo ≈ — · full-brick estimate ≈ 0.01 (all Inferred)
• Combo output: best PowerIndex —, median —, board-per-starter —
• Turn order: 0 going-first lines vs 0 going-second lines

Strengths

• Starter access is very high: the core group and searcher text both give near-certain access by turn two.
• Layered interaction across hand traps, negation-text Xyz monsters and K9-66X Jacks.
• Many 2500-3300 ATK bosses that close games once a board is established.

Weaknesses

• No side deck, so there is no adaptation for best-of-3 matchups.
• Three Extra Deck cards need Level 9 or 12 materials that the Main Deck does not provide.
• Only one copy each of the key Limited hand traps and tech (Maxx C, Magnamhut, Reinforcement, Stake your Soul).

Critical choke points

• The Level 5 Xyz pair needed for K9 Ripper and Jacks depends on hand-revealed monsters; a hand with no Level 5 Xyz material cannot reach the boss plan on turn one.
• Ash Blossom and Maxx C are the only hand-trap answers to a first interaction when going second.

Recommended changes

Evidence & confidence

• Verified: Legal at master-duel: 40 Main, 15 Extra, 0 Side, all five restricted cards within legal copies; Usage stats: K9-66a Jokul, K9-17 Izuna, Ash Blossom and Maxx C at 100 percent inclusion; Card text for the 25 Main and 15 Extra distinct cards
• Observed: Core archetype cards present at typical copy counts (usage stats)
• Inferred: Opening-hand and searcher access probabilities; Ceiling and floor of the Xyz and hand-reveal engine from text only; Interaction density and board-breaking reads; Extra Deck gating for Werewolf, ZEUS and TY-PHON
• Provisional: Meta Power (null); D13 matchup and format fit; Tournament reliability inputs without a dated meta sample
• 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 are absent. No win-rate telemetry: going-first, going-second, matchup and brick rates are Inferred or Unknown. Meta Power is Provisional unless a dated metagame sample is supplied. No guides attached for the K9 archetype.