K9 Deck #773908 — Yu-Gi-Oh! Master Duel

Deck — Deck Power Evaluation

Final Contextual Deck Power: 62/100 (±7 · Confidence: Medium)

• Primary strategy: Combo
• Secondary strategies: Midrange, Stun
• Format: master-duel

Legality

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

Identity & game plan

• Win condition: Normal Summon Level 5 K9 monsters without tribute, then Xyz Summon K9-X Werewolf, K9-X Ripper/M or K9-66X Jacks to close with multi-attack, piercing damage and board removal.; Number-based Xyz routes (Number 104, Number C104, Number C106, CXyz N.As.Ch. Knight) reached through Seventh Tachyon searches and Extra Deck Xyz chains.
• Turn 1 (going first): Turn 1: Normal Summon a K9 Level 5 monster (Noroi, Lantern, Izuna, Jokul or Lupis), search with A Case for K9 or Lantern, then Xyz Summon K9-17 Ripper or Jacks. Keep Ash Blossom, Effect Veiler, Droll and Impermanence for the opponent's turn.
• Turn 2 (going second): Hold the hand traps (Ash Blossom, Effect Veiler, Droll and Lock Bird, Infinite Impermanence, Maxx C, Ghost Ogre) against the opponent's first monster effect, then extend with a K9 Level 5 monster and Xyz Summon.
• Recovery: Special Summon K9 Lantern from hand together with a Level 5 non-Pyro K9 from the GY, then reload with A Case for K9, Jokul or Ripper's search effect.
• After siding: Not applicable: Master Duel has no side deck in this export (side_count 0), so there is no post-side adaptation to score.

Why it scores here

The deck reliably opens a K9 Level 5 starter: the hypergeometric estimate is about 0.82 for at least one of the 11 Noroi, Lantern, Izuna or Jokul copies in a going-first five-card hand, and about 0.90 for at least one of the 14 searcher-text cards. Conversion into a Xyz board is supported by the 7 K9 Xyz copies in the Extra Deck, with Werewolf, Ripper/M and Jacks providing the closing attacks, piercing damage and removal. Interaction is dense: 11 hand traps (about 0.88 for at least one in a going-second six-card hand) plus 9 negation-text cards. Recovery is reasonable through Lantern's GY Special Summon and the searchers. The score is held down by the absence of combo boards (so the ceiling and median are text-only inferences), by 8 non-Synchro Tuner monsters in the Main Deck, by many single-copy off-archetype Xyz, and by the lack of any tournament or matchup data. Popularity and archetype usage did not earn points, and card scores were not averaged; the score comes from the system-level consistency, interaction and closing read.

Dimension scores

How the score was computed

Strategy profile: Combo. Structural ≈ 66, Going First ≈ 70, Going Second ≈ 68, Meta = provisional, Tournament Reliability ≈ 58. Modifiers: banlist_exposure (-2); hard_garnet_burden (-2); engine_conflicts (-1); engine_compactness (2). Final formula: 0.80*Structural + 0.20*TournamentReliability + ContextModifiers (Meta provisional) = 0.80*66.28 + 0.20*58 - 3 = 61.6, rounded to 62

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.82 · 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

• About 0.82 chance of a K9 Level 5 starter in a going-first opening hand, with 14 searcher-text cards behind it.
• Dense interaction: 11 hand traps and 9 negation-text cards, with about 0.88 chance of at least one hand trap when going second.
• Strong Extra Deck closers: K9-X Werewolf (3300 ATK, multi-attack), K9-X Ripper/M (3100 ATK, piercing) and K9-66X Jacks (2600 ATK, board destruction).
• Compact K9 core: 18 K9 cards in Main and 7 K9 Xyz in Extra.

Weaknesses

• No combo boards were recorded, so ceiling and floor are text-only inferences.
• Eight non-Synchro Tuner monsters (Ash Blossom, Effect Veiler, Ghost Ogre, Ghost Mourner) have no Synchro payoff in the Extra Deck and act only as hand traps.
• Eight non-K9 Xyz in Extra, most of them singletons, so the Extra Deck is only partly used in any single line.
• Seventh Tachyon and the Number Xyz are a thin side-engine, and the three Numbers are singletons.
• No side deck, so no post-side adaptation; no tournament or matchup evidence.

Critical choke points

• Opening-hand dependence on the 11 K9 Level 5 monsters (about 18 percent chance of none in a going-first 5-card hand).
• Normal Summon without tribute needs the opponent to hold 2 or more cards in hand; a hand-empty opponent removes the no-tribute line.
• Xyz Summons depend on K9 Level 5 materials staying on the field; a single clean removal or hand-trap answer can end the turn.

Recommended changes

Evidence & confidence

• Verified: Legal under BanMasterDuel: 40 Main, 15 Extra, 0 Side within size rules; Maxx C and Crossout Designator at 1 copy (Limited), Droll and Lock Bird at 2 copies (Semi-Limited).; Hypergeometric figures recomputed and matched: 0.8195 (11 K9 Level 5 starters, going first), 0.8762 (11 hand traps, going second), 0.3376 per 3-copy card in a 5-card hand, 0.90 searcher group.; Archetype composition: 25 K9 copies, 45.5 percent exact-name purity, 15 Xyz in Extra.
• Inferred: Engine T1 reliability and hand-trap interaction density, from probability and card text.; Ceiling and floor from text-only combo structure, since no boards were recorded.; Brick risk from hand traps and non-Synchro Tuners.
• Provisional: Meta power (no dated metagame sample supplied).; Matchup and side-deck performance (no data).; Format fit (archetype meta-share not supplied).
• Data gaps: No combo boards: combo floor, median and ceiling are text-only inferences. No tournament link: archetype meta-share and pilot match record absent. No win-rate telemetry for going-first, going-second, matchup, brick or starter rates. Meta power is provisional without a dated metagame sample. usage_statistics internal inconsistency: in_this_deck is false for K9-X Werewolf, K9-66X Jacks, K9-17 Ripper, Number 104, Number C104, N.As.H. Knight, CXyz N.As.Ch. Knight and Divine Arsenal AA-ZEUS, yet the cards array lists each of them with 1 or more copies. The reported core_present_pct of 24 percent is therefore likely understated; the cards array was used as the source of truth (about 14 of 25 core cards present).