Mathmech Deck #772681 — Yu-Gi-Oh! OCG

Deck — Deck Power Evaluation

Final Contextual Deck Power: 25/100 (±8 · Confidence: Low)

• Primary strategy: Midrange
• Secondary strategies: Toolbox, Tempo
• Format: ocg

Legality

Main 48 / Extra 13 / Side 0 — status under the rules at evaluation time: Illegal. 1 violation(s).

Identity & game plan

• Win condition: Synchro/Xyz/Link-based board pressure from Mathmech and Primathmech extra-deck monsters, with Geomathmech Final Sigma as the single boss; Non-engine beatdown via Nibiru, Gadarla and Link Monsters after hand-trap and removal interaction clears the opponent's board
• Turn 1 (going first): Open a Mathmech starter (Mathmech Diameter, Mathmech Sigma or Mathmech Addition) with Mathmech Equation or Cynet Mining as backup, then keep Ash Blossom, Ghost Belle or Effect Veiler up for the opponent's first interaction. The deck has no archetype-specific T1 combo that is clearly reliable in the evidence.
• Turn 2 (going second): Use the six-card hand to force interaction with hand traps (13 total, about 87% chance of at least one in six cards) and pick up a Nibiru or Raigeki-style board breaker, then convert with a Link or Xyz boss on the next turn.
• Recovery: Recover through the Mathmech GY-revival effects (Mathmech Equation, Mathmech Superfactorial), Token Collector and Cynet Mining, and rebuild with Link Monsters from the Extra Deck.
• After siding: Not evaluable: the deck runs zero side-deck cards, so there is no post-side plan in the evidence.

Why it scores here

The deck was scored as a connected system and not as an average of its card scores. Its consistency is moderate: the Mathmech core is present in only 18 of 48 main-deck slots (29.5% exact-name purity), and the three-copy Ash Blossom and Mathmech Diameter give roughly 29% odds of drawing one in a going-first opening hand of five. Interaction is the strongest area, with 13 hand traps, 15 negation-text cards and 20 removal-text cards, so the deck can keep answering an opponent's first plays. Combo ceiling and floor could not be measured, because the evidence contains no recorded boards, so those scores are text-only inferences with low confidence. Popularity and archetype usage did not earn points: the deck is missing 18 of 25 core archetype cards and the list is illegal. Because the list breaks the OCG copy limit, the score is capped at 25 and labelled structural-only.

Dimension scores

How the score was computed

Strategy profile: Midrange primary, Toolbox secondary (disclosed; Midrange weights used for structural score). Structural ≈ 48, Going First ≈ 42, Going Second ≈ 50, Meta = provisional, Tournament Reliability ≈ 40. Modifiers: banlist exposure (-8); archetype dilution (-4). Final formula: Illegal list: theoretical/structural-only. Pre-cap 0.80*48 + 0.20*40 + modifiers(-12) = 34; capped at 25 for the Illegal status. Meta provisional (null).

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.29 · 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

• Dense interaction suite: 13 hand traps, 15 negation-text cards and 20 removal-text cards
• Multiple going-second answers to a board (Nibiru, Raigeki, Harpie's Feather Duster, Dark Ruler No More)
• Redundant Mathmech starters and GY recursion

Weaknesses

• Illegal copy count on Ash Blossom & Joyous Spring (3 copies against a limit of 2)
• Low archetype purity (29.5%) and 18 of 25 core archetype cards missing
• No side deck, so no post-side adaptability
• No recorded combos, so the combo ceiling and floor are unmeasured

Critical choke points

• Ash Blossom & Joyous Spring must be cut to 2 copies before the list can be legal
• Extra Deck bosses (Primathmech, Geomathmech Final Sigma) depend on a small number of single-copy Link and Xyz materials

Recommended changes

Evidence & confidence

• Verified: Main deck 48 cards, Extra Deck 13, Side 0 (legal size); Ash Blossom & Joyous Spring runs 3 copies against a Semi-Limited limit of 2 (illegal); Harpie's Feather Duster and Mathmech Circular run 1 copy each (legal Limited); Archetype purity 29.5%; 18 of 25 core cards missing
• Inferred: P(>=1 starter in 5) ~0.29 for 3-copy cards; archetype core ~0.62; Interaction density is high based on text roles; Consistency and floor/median estimates
• Provisional: Meta Power (no dated metagame sample); Matchup and format fit (no tournament data)
• Data gaps: No combos supplied: combo floor, median and ceiling are text-only inference No tournament link: archetype meta-share and per-pilot record absent No win-rate telemetry for going-first/second, matchups or brick rate Meta Power provisional without a dated metagame sample No side deck: post-side plan cannot be evaluated