One Piece Card The Best vol.2 Booster Box EV Calculator

Best Evidence — English opening marginal assumptions

Evidence

This calculator is based on Best Evidence — English opening marginal assumptions reviewed September 4, 2026.

Sources

• One Piece Card The Best vol.2 [PRB-02] official English product page - Bandai Co., Ltd. (accessed 2026-09-03)
• TCGCSV category 68 group 24305, sealed product 628452 - TCGCSV (accessed 2026-09-03) — identity and pricing were imported into local generated artifacts; the calculator does not call the raw endpoint.
• Best Evidence — English opening marginal assumptions and ordinary-pool classification - The Expected Value (accessed 2026-09-04)
• English PRB02 exact reprint and treatment roster - Bandai Co., Ltd. (accessed 2026-09-04)
• Exact English PRB02 twenty ten-card packs; wrapper only - Chief Cards (accessed 2026-09-04)
• PRB02 English two-case selected-hit report, not complete collation - vegetto712 via Reddit (accessed 2026-09-04)
• First-hand PRB02 Pirate Foil hit-position correction - IkananXIII and poppyEUNE via Reddit (accessed 2026-09-04)
• Japanese PRB02 ten-card product and 179+30 identity, not English odds - Bandai Co., Ltd. (accessed 2026-09-04)

Limitations

• collation.cardsPerPack and collation.packsPerProduct: the product uses 10 cards per pack and 20 packs per English booster box; those physical wrapper counts do not establish rarity-slot probabilities.
• collation.caseStructure: box-level hit counts and display/case correlations are unresolved for the exact English North America printing.
• evidence.sample: null because no reviewed observation provides a complete, attributable sample with exact unit, size, method, North America printing, and observation interval.
• Modeling policy approved 2026-09-04: every supported ordinary card in the same slot, rarity, treatment, and finish pool receives one equal positive selection weight. This is a transparent modeling assumption where the publisher or empirical sample gives pool odds but not card-level sheet weights.
• PRB02 uses its own English selected-hit opening reports and explicit marginal assumptions, not PRB01 rates or a verified Japanese collation ledger. The English publisher establishes the SR-or-higher guarantee and exact product/checklist; the English retailer identifies twenty ten-card packs per display, totaling 200 cards. The Japanese publisher independently lists ten-card packs but does not supply English rates. Checklist sizes are identities, never pull rates.
• The exact English roster contains 173 ordinary identities: 46 C, 29 UC, 41 R, 34 SR, 8 regular SEC and 15 in-pack P-numbered Promotion reprints, including 18 new PRB02 cards (12 R and 6 SR). There is no Leader. The English product headline 129+30 conflicts with its own rarity table; the Japanese 179+30 includes six SP treatments. The English card gallery resolves the ordinary population without truncating it to 129. All 173 exact dedicated group-24305 base listings are retained: C/UC/Promo use Normal, R/SR/SEC use Foil. The extra Normal price rows for Basil Hawkins OP10-109 and Zoro OP06-118 are not validated pack finishes and are excluded.
• All 90 ordinary Pirate Foils (46 C, 29 UC and 15 Promotion identities) are retained as separate Foil price SKUs. They are not rare chase alternate arts, not PRB01 Jolly Roger cards, and not base Normal reprints. Thirty DON!! designs each retain Normal and Foil, giving 60 finish SKUs but only ONE physical DON!! position per pack. All 323 exact retained English SKUs require positive TCGplayer Low; missing identities, wrong groups/finishes or missing prices fail the whole classification. No original-group supplementation, Japanese prices, name-based substitution or zero-price fallback is used.
• The PRB02 English opener vegetto712 reports two cases, explicitly ten twenty-pack boxes per case, normally two SEC and two Foil-or-Gold DON!! per box, with exceptions and unequal per-card counts. This selected-hit report is not a complete rarity ledger or a guarantee. Adopt 90/10 SR/SEC and 90/10 Normal/Foil DON!! only as PRB02 marginal assumptions. Conditioning a reported Gold replacement to its retained ordinary Foil DON!! preserves the two Foil-or-Gold positions, rather than flattening sixty DON!! SKUs into a 50/50 finish mix. Equal card weights within each rarity/finish pool remain assumptions, including new versus reprinted cards.
• The English report says one to two Pirate Foils per pack. A separate first-hand exchange corrects its author's initial claim that hits replace Rare: the commenter and author instead identify the Pirate Foil position. Adopt the ten-position no-chase recipe as an explicit reconstruction: five ordinary C/UC/Promo, one Rare, one SR/SEC, two retained Pirate Foils and one DON!!. Expected display marginals are 100 bulk, 20 Rare, 18 SR, 2 SEC, 40 Pirate Foils, 18 Normal DON!! and 2 Foil DON!! = 200. The five-bulk/two-Pirate allocation and uniform 90-identity bulk/imprint weights are disclosed assumptions, not observed complete slot frequencies.
• PRB02 has no separate collector booster. This no-chase premium baseline removes alternate arts, six SP treatments, four foil-stamped event alternate arts, Manga Sanji, Gold DON!! and god-pack branches before drawing. Normalize retained Pirate Foils in the special-art position and ordinary Foil DON!! in the Gold/Foil position, keeping all ten physical positions; there is no zero-EV occupied chase branch and no separate topper. Draw every card in the complete 200-card display before Sift and user filters without backfill. Independent draws match assumed marginals, not case seeding, fixed box hits, no-duplicate rules or guaranteed printing-wave frequencies. Embedded pack EV equals display EV divided by twenty; only the display is public. evidence.sample is null because no complete attributable opening interval/printing-wave ledger was established.
• Simulation ordering is draw the complete disclosed no-chase product first, record that draw, and only then apply Sift or another user filter. Sift never changes or backfills the completed modeled draw.