Gem-Knights Deck #773768 — Yu-Gi-Oh! Master Duel

Deck — Deck Power Evaluation

Final Contextual Deck Power: 52/100 (±7 · Confidence: Medium)

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

Legality

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

Identity & game plan

• Win condition: Fusion, Xyz and Link pressure from Ruby, Topaz, Amethyst, Diamond Crab, Cairngorgon, Kachi Kochi, Ningirsu and Gaia Saber, converted through the Gem-Knight Fusion engine; Topaz double attack and Kachi Kochi second attack for closing damage; Call of the Haunted and Overexaggeration as board-clearing support
• Turn 1 (going first): Normal Summon Gem-Armadillo or Gem-Turtle to search a Gem-Knight or Gem-Knight Fusion, then Tribute Alexandrite or Fusion into Garnet/Tourmaline material and build a Fusion, Xyz or Link board
• Turn 2 (going second): Hold Jelly Cannon, Compulsory Evacuation Device, Overexaggeration or Mystical Space Typhoon for the opponent's turn, then rebuild from Gem-Knight Fusion recursion from the Graveyard
• Recovery: Gem-Knight Fusion banishes a Gem-Knight from the Graveyard to return itself to hand; Gem-Turtle and Gem-Armadillo re-search from the Deck; Dai summons a Level 4 or lower Normal Monster when no monsters are controlled
• After siding: No side deck in Master Duel; adaptation is limited to the choice of which Extra Deck Fusion, Xyz or Link to open with

Why it scores here

The deck reliably opens a Gem-Knight starter about three times in four: P(at least one of the nine Armadillo, Turtle or Alexandrite copies in the opening five) is roughly 0.74, and the searcher group (eight copies) gives P(at least one) = 0.694. Gem-Knight Fusion (two copies) is present in only about a quarter of openings, so Fusion access depends on the searchers and Gem-Turtle's flip search, which keeps the Fusion line from being a guaranteed turn-one plan. The deck's conversion comes from the Extra Deck: three Ruby, one Topaz and one Amethyst with Fusion, five Xyz and five Link monsters give a wide set of boards, and Topaz and Kachi Kochi add second attacks. The score comes from consistency, median output and interaction on the whole system, not from Gem-Knights being a popular archetype and not from averaging card scores: there are no combo boards in the evidence, so ceiling and median are text-based inferences. Interaction is six spell and trap cards with no hand traps, which is adequate on the player's own turn and weaker going second. Archetype purity is low (16 of 40 main-deck cards are Gem-, with 22 off-archetype spells, traps and monsters), so the deck is a hybrid rather than a pure engine.

Dimension scores

How the score was computed

Strategy profile: Midrange (meta-neutral: D13 dropped, weights renormalised over remaining 95). Structural ≈ 56.4, Going First ≈ 58, Going Second ≈ 57, Meta = provisional, Tournament Reliability ≈ 52. Modifiers: Fusion-spell choke point (-2); Normal Summon and material conflicts (-1); Off-archetype dilution (-1). Final formula: 0.80*Structural + 0.20*TournamentReliability + ContextModifiers (Meta provisional; Structural 56.4 = Midrange weights with D13 dropped and renormalised; 0.80*56.4 + 0.20*52 - 4 = 51.5, rounded 52)

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.74 · 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

• Starter access about 0.74 for the nine Normal Summon starters, with search from Armadillo, Turtle and Fusion
• Three-copy engine cards give consistent openings
• Wide Extra Deck with Fusion, Xyz and Link payoffs and strong ATK (Ruby, Ningirsu, Gaia Saber, Cairngorgon)
• Six spell/trap interaction cards, plus Graveyard recursion through Gem-Knight Fusion

Weaknesses

• No hand traps or floodgates, so going-second interaction is limited
• Low archetype purity: 22 off-archetype main cards dilute the engine
• Fusion spells (two copies) are a single choke point for Ruby, Topaz and Amethyst
• Amethyst's Aqua material is effectively Sapphire-only in the Main Deck
• No side deck, so there is no post-side plan in Master Duel

Critical choke points

• Gem-Knight Fusion (2 copies): P(at least one in opening 5) ≈ 0.24
• Gem-Knight Garnet as the Ruby material and Dai target: three copies, one Normal Summon per turn
• Sapphire as the only Aqua Main Deck material for Amethyst

Recommended changes

Evidence & confidence

• Verified: Legal in Master Duel: 40 Main, 15 Extra, 0 Side; all cards Unlimited, no violations; Copy histogram 3/2/1 = 9/5/3 distinct Main cards; 22 spells/traps and 18 monsters in Main; Extra Deck: 5 Fusion, 5 Xyz, 5 Link (13 distinct); Gem- archetype count 21 of 55 cards; off-archetype 22 Main cards; Draw probabilities from the supplied hypergeometric table
• Observed: Usage stats: 22 archetype rows; the deck runs 1 of 19 core Main cards (Gem-Knight Fusion), with Topaz, Ruby and Amethyst Extra cards not counted in that match
• Inferred: Starter access, brick rate and Fusion choke point from hypergeometric estimates; Going-first and going-second plans from card text; Ceiling and median from card text only (no boards); Interaction quality from card text (MST, SoRL, CED, CotH, Jelly Cannon, Overexaggeration)
• Provisional: Matchup and format fit (D13), Meta Power (null); Tournament reliability inputs, since no tournament link exists
• Data gaps: no combos supplied: combo floor/median/ceiling is text-only inference no tournament link: archetype meta-share and per-pilot match record absent no win-rate telemetry: going-first/second, matchup and brick rates are Inferred usage statistics 'in this deck' appears to ignore Extra Deck cards (Ruby, Topaz, Amethyst are in the deck but flagged as missing), so core-card presence is likely understated; treat core coverage as a lower bound Meta Power is Provisional: no dated metagame sample deck title is null; name is taken from archetype