B.E.S. Deck #773627 — Yu-Gi-Oh! Master Duel

Deck — Deck Power Evaluation

Final Contextual Deck Power: 49/100 (±7 · Confidence: Medium)

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

Legality

Main 60 / Extra 15 / Side 0 — status: Legal.

Identity & game plan

• Win condition: Level 10+ B.E.S. boss monsters (Derringer Core, Metal Slave, Big Core, Blaster Cannon Core) converting Boss Rush and Boss on Parade into a 2500–3100 ATK board, with Varudras as the Extra Deck closer.; Varudras and the Fusion/Link pieces (Bucephalus II, Mouser, Mudragon, Garura, Flame Wingman, N'tss) as supplementary threats; the Chimeratech pair requires Cyber Dragon material.
• Turn 1 (going first): Open with Zelos or Boss on Parade and search Boss Rush or a Derringer Core, then Special Summon Derringer Core from hand and use its counters to add Boss Rush or a B.E.S. Spell to stack a second B.E.S. boss.
• Turn 2 (going second): Use Lightning Storm, Heavy Storm or Harpie's Feather Duster to clear the opponent's backrow, Maxx C and Evenly Matched for hand/board interaction, then Boss Rush off a destroyed B.E.S. monster to rebuild the boss board.
• Recovery: Cyber Repair Plant and Cyber Emergency recover Cyber Dragon pieces, Super B.E.S. Metal Slave sends several level 10 or lower B.E.S. monsters to the GY for counters, and Boss Rush returns a B.E.S. monster from the Deck after one is destroyed.
• After siding: Not applicable: Master Duel has no sideboard and this list runs 0 side cards, so there is no best-of-3 adaptation to score.

Why it scores here

The deck is scored as a system: a 15-card B.E.S. engine (Derringer Core ×3, Zelos ×3, Boss on Parade ×3, Metal Slave ×3, Boss Rush ×2) with 21 searcher-text cards gives it a reasonable chance to reach a live starter, with about a 23% chance of at least one Derringer Core in a going-first opening 5 and about 89% for some searcher. Once live it converts into 2500–3100 ATK bosses and a Varudras closer, and its median output is pulled down by the 18 singleton slots and the many non-engine tech cards that do not advance the board. The interaction suite (Heavy Storm, Feather Duster, Lightning Storm, Maxx C, Evenly Matched, Gordian Slicer) is broad, but only three of those are Limited, so it is not decisive on its own. The Extra Deck drags the score: four of the 15 Extra cards (Mereologic Aggregator, TY-PHON, Malong, Wind Pegasus) have no reliable summoning path with this Main Deck, and the rest come from at least four unrelated engines. Popularity and archetype usage did not earn points, and the card scores were not averaged.

Dimension scores

How the score was computed

Strategy profile: Midrange. Structural ≈ 55, Going First ≈ 55, Going Second ≈ 52, Meta = provisional, Tournament Reliability ≈ 52. Modifiers: Extra Deck coherence and dead cards (-4); Banlist exposure (-1); Engine conflicts (-2); Boss redundancy (2). Final formula: 0.80*Structural + 0.20*TournamentReliability + ContextModifiers (Meta provisional)

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.23 · key two-card combo ≈ — · full-brick estimate ≈ 0.09 (all Inferred)
• Combo output: best PowerIndex —, median —, board-per-starter —
• Turn order: 0 going-first lines vs 0 going-second lines

Strengths

• Three Derringer Core plus two Boss Rush and three Boss on Parade give repeatable B.E.S. boss summons
• Metal Slave at 3100 ATK and Varudras at 3000 ATK give high closing power
• Broad interaction suite across S/T removal, monster-summon punishment and Gordian Slicer

Weaknesses

• Four Extra Deck cards (Mereologic, TY-PHON, Malong, Pegasus) have no reliable materials in this Main Deck
• Extra Deck spans at least five unrelated engines, diluting the B.E.S. plan
• 18 singleton main slots and many tech cards lower consistency

Critical choke points

• At least one Derringer Core or Zelos in the opening hand is the main engine gate (about 23% per copy-set for going first)
• Super Polymerization (2 copies) is required for most Fusion Extra Deck lines

Recommended changes

Evidence & confidence

• Verified: Legal in Master Duel: 60 main, 15 extra, 0 side within size rules (40–60, 0–15, 0–15); Copy limits respected for Limited (Feather Duster, Heavy Storm, Maxx C at 1) and Semi-Limited (Super Polymerization at 2); Archetype composition: B.E.S. 15 copies, Cyber Dragon 7, Mulcharmy 6
• Inferred: P(≥1 Derringer Core in going-first 5) ≈ 0.23; P(≥1 searcher in 5) ≈ 0.89; Engine conflicts and Extra Deck dead-card reads from card text and summon requirements; Interaction density and ceiling read from card text
• Provisional: Meta Power (null) and D13 format fit: no dated metagame sample; D12 side adaptability: no sideboard in Master Duel
• 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 usage statistics marks Elder Entity N'tss, Mudragon, Garura, Chimeratech pair, Malong, Pegasus, Light Dragon, Mereologic, Varudras, TY-PHON, Bucephalus II and Flame Wingman as in this deck:false, but the cards list has all of them in the Extra zone — the core_present/missing core cards figures (48%) are unreliable and were not used no win-rate telemetry exists in YGOVN (going-first/second, matchup, brick/starter rates) — those signals are Inferred or Unknown Meta Power is Provisional unless a dated metagame sample is supplied