K9 Deck #773838 — Yu-Gi-Oh! Master Duel

Deck — Deck Power Evaluation

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

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

Legality

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

Identity & game plan

• Win condition: Xyz pressure from K9 Xyz monsters (K9-X Ripper/M, K9-X Werewolf, K9-66X Jacks, Number C104) built through K9 Normal Summons and Xyz Summons; Off-archetype Number and Infinitrack/Artifact/Heart Xyz monsters as finishers when the K9 line is disrupted
• Turn 1 (going first): Normal Summon K9-04 Noroi or K9-17 Izuna without tributing (opponent holds 2+ cards), Special Summon a K9 from the Deck, then turn it into a Xyz (Ripper, Ripper/M, Jacks) while holding Ash Blossom or Infinite Impermanence for the first disruption
• Turn 2 (going second): Open with a hand trap (Ash Blossom, Infinite Impermanence, Droll & Lock Bird, Maxx C) to answer the opponent's first summon or search, then rebuild the K9 engine on the next turn
• Recovery: Lean on the K9 searchers (A Case for K9, K9-66a Jokul, K9-66b Lantern, Chaotic Elements, K9-17 Ripper) and recursive Special Summons from the GY to refill the board after a negation
• After siding: No side deck in Master Duel (Side Deck size 0); the plan is unchanged between games

Why it scores here

The deck opens a functional K9 engine reliably enough: the 12-copy archetype core gives about an 85 percent chance of at least one K9 card in a 5-card opening hand (Inferred hypergeometric), and the K9 Normal Summon clause lets the engine start without tributes. Its strongest scores come from the system as a whole: nine hand traps and about eleven negation effects give layered interaction (D7 74) and real answers on the opponent's first turn, while Ripper/M, Werewolf, Jacks and the Number monsters give closing power (D9 74). Conversion (D3 62) and median output (D4 48) are text-only estimates because the export contains no recorded boards, so they are the least certain scores. Consistency is held back by only 40 percent exact-name archetype purity (33 off-archetype copies) and by a 40-card main with 6 single-copy techs, which add brick risk. Popularity and usage stats did not earn points, and the usage-stat core coverage (24 percent) conflicts with the card list, so it was not used to raise any score. No card scores were averaged into the deck score.

Dimension scores

How the score was computed

Strategy profile: Midrange. Structural ≈ 62, Going First ≈ 67, Going Second ≈ 67, Meta = provisional, Tournament Reliability ≈ 58. Modifiers: banlist exposure (-2); engine conflicts (-3). Final formula: 0.80*Structural + 0.20*TournamentReliability + ContextModifiers (Meta provisional; D13 dropped and weights renormalised to 95): 0.80*62 + 0.20*58 - 5 = 56

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.85 · key two-card combo ≈ — · full-brick estimate ≈ 0.15 (all Inferred)
• Combo output: best PowerIndex —, median —, board-per-starter —
• Turn order: 0 going-first lines vs 0 going-second lines

Strengths

• Layered interaction: nine hand traps plus Disablaster, Cyber Dragon and Number negations give answers at several timings
• Strong closing Xyz options: Ripper/M (3100 ATK, piercing), Werewolf (3300 ATK, multi-attack), Jacks, Number C104
• Good card access: K9 core of 12 copies with about 85 percent chance of at least one in a 5-card opening hand

Weaknesses

• Only 40 percent exact-name archetype purity; 33 off-archetype copies weaken the engine
• Six single-copy techs and nine hand traps raise the chance of a dead card in some hands
• No recorded boards, so conversion and median output are text-only estimates
• No side deck, so there is no post-side adaptation

Critical choke points

• The first K9 Normal Summon (Noroi or Izuna) must resolve; the opponent's first negation or Droll-style hand disruption can stop the whole line
• Xyz Summons depend on Ripper and Jacks being in place; losing the first Xyz leaves the rest of the Extra Deck without a route

Recommended changes

Evidence & confidence

• Verified: Main 40, Extra 15, Side 0, all cards legal under master-duel ban field (BanMasterDuel); Maxx C and Crossout Designator are Limited (one copy each), Droll & Lock Bird is Semi-Limited (two copies); Copy histogram: six 3-copy, eight 2-copy, six 1-copy main cards; 40 percent exact-name archetype purity
• Observed: Usage stats show the K9 core with 100 percent inclusion for several cards (K9-66a Jokul, K9-17 Izuna, Ash Blossom)
• Inferred: At least one K9 starter in opening 5 about 0.85 (archetype core group); Hand-trap coverage about 0.81 in a 6-card going-second hand; Brick and consistency estimates from composition and card text; Ceiling and median from text only
• Provisional: Meta Power is null: no dated metagame sample, no tournament link; D13 matchup fit is provisional and dropped from Structural
• Data gaps: No combos supplied: combo floor, median and ceiling are text-only inference (D3, D4 are low confidence) No tournament link: archetype meta-share and per-pilot match record absent No win-rate telemetry; going-first and going-second rates are Inferred Meta Power is Provisional unless a dated metagame sample is supplied Usage statistics conflict with the card list: missing core cards and in this deck flags mark K9-X Werewolf, K9-66X Jacks, N.As.H. Knight, Number 104, Number C104 (Umbral Horror) and AA-ZEUS as absent although they appear in the deck's Extra Deck, so the core-present 24 percent figure was not used Master Duel has no side deck, so D12 has no post-side data