K9 Deck #751321 — Yu-Gi-Oh! TCG

Deck — Deck Power Evaluation

Final Contextual Deck Power: 30/100 (±10 · Confidence: Medium)

• Primary strategy: Combo
• Secondary strategies: Stun
• Format: tcg

Legality

Main 55 / Extra 15 / Side 0 — status under the rules at evaluation time: Illegal. 8 violation(s).

Identity & game plan

• Win condition: Synchro beatdown and boss monsters, notably Kewl Tune B2B (3200 ATK), Black Rose Dragon and Super Starslayer TY-PHON (Extra Deck, no Xyz-enabler text beyond the excerpt); K9 beatdown from K9-17 Izuna, K9-00 Lupis and K9-17 Ripper
• Turn 1 (going first): Normal Summon a Kewl Tune Tuner (Cue, Mix or Clip), search or revive a Kewl Tune card, then Synchro Summon a Kewl Tune Tuner; hold hand traps for the opponent's first response
• Turn 2 (going second): Hand trap the opponent's first starter (Ash Blossom, Ghost Ogre, Ghost Belle, Effect Veiler or Droll & Lock Bird), then Synchro Summon from the resulting board
• Recovery: Kewl Tune Playlist and Kewl Tune Mix/Reco add Kewl Tune monsters back from GY; Ghost Belle recovers a monster from GY; Izuna recovers pressure through Special Summon
• After siding: None: the deck runs 0 side-deck cards, so there is no post-side plan in the export

Why it scores here

The deck opens its Kewl Tune engine reliably enough on paper: the archetype-core group gives P(at least one of 16 core cards in a 5-card opening hand) of about 0.83, and 14 hand traps give about 0.84 for at least one in a going-second 6-card hand (Inferred, hypergeometric). Its ceiling is set by the Kewl Tune Synchro line and high-ATK boss monsters such as B2B and TY-PHON, and its interaction density (15 negation-text and 28 removal-text cards) lifts end-board and going-second scores. Its weaknesses are structural and largely self-inflicted: the list is Illegal under the TCG banlist, with Forbidden Kewl Tune Rotary and Called by the Grave and four Limited or Semi-Limited cards run over their caps, and it has no side deck, so it has no post-side plan. Scoring is on the system (consistency, median output, interaction, and resilience), not an average of card scores, and popularity from K9 usage statistics did not add points. The score is capped at 30 because the list is Illegal; the uncapped structural read is about 45 after modifiers.

Dimension scores

How the score was computed

Strategy profile: Combo. Structural ≈ 60, Going First ≈ 58, Going Second ≈ 62, Meta = provisional, Tournament Reliability ≈ 45. Modifiers: Banlist exposure (-7); Engine conflicts (-3); No side plan (-2); Illegal list cap (0). Final formula: No reliable metagame: 0.80*Structural + 0.20*TournamentReliability + ContextModifiers = 0.80*60 + 0.20*45 - 12 = 45 uncapped; capped to 30 because the list is Illegal (theoretical/structural-only)

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.83 · key two-card combo ≈ — · full-brick estimate ≈ 0.17 (all Inferred)
• Combo output: best PowerIndex —, median —, board-per-starter —
• Turn order: 0 going-first lines vs 0 going-second lines

Strengths

• Dense hand-trap and negation package (14 hand traps, 15 negation-text cards)
• High-ceiling Synchro engine with Kewl Tune recursion from GY
• Strong closing ATK in the Extra Deck (B2B 3200, TY-PHON 2900)
• Good starter redundancy: 16 Kewl Tune/K9 core copies

Weaknesses

• Illegal list: Forbidden Kewl Tune Rotary x3 and Called by the Grave x1
• Four Limited or Semi-Limited cards over their caps
• No side deck, so no post-side adaptability
• Low main-deck compactness: 55 cards, 27 distinct, 17 zero-level cards

Critical choke points

• Kewl Tune Synchro and Reco are key searchers and are over their Limited caps; they are needed for the engine at legal counts
• Loss of the Tuner base to a single hand-trap answer on an opponent's first Synchro attempt

Recommended changes

Evidence & confidence

• Verified: Legality status Illegal with 8 copy-limit violations, including 2 Forbidden cards; Main 55 and Extra 15 are within the TCG size rules; Side 0 is legal; Card text and stats for the listed Kewl Tune, K9 and hand-trap cards; Hypergeometric draw odds: 3 copies in 5 cards = 0.2529; 3 copies in 6 cards = 0.2977
• Inferred: Engine consistency (P ≈ 0.83 for the core group) from the hypergeometric proxy; Interaction density and going-second hand-trap coverage from card-text reads; Closing power from the Extra Deck ATK and text; Pilotability from the number of Tuner and Synchro steps
• Provisional: Meta Power and matchup fit (no dated metagame sample); Median output (no recorded boards)
• Data gaps: No combos supplied: combo floor, median and ceiling are text-only inference No tournament link: archetype meta-share and per-pilot record are absent No win-rate telemetry: going-first/second, matchup and brick rates are Inferred or Unknown Meta Power is Provisional unless a dated metagame sample is supplied No side-deck list: post-side performance cannot be assessed Usage statistics mark K9-17 Ripper, Vallon and Super Starslayer TY-PHON as not in this deck, but the card list includes them in the Extra Deck; treated the card list as authoritative