Four answers, and always the why
For an ACE slab going to PSA: from ACE's four subgrades and the centering, front and back (each the worse of top/bottom and left/right). Other crossings will get verdicts of their own as they're added.
All four subgrades are 10, the front centering is within 52.5/47.5 and the back within 72.5/27.5: worth crossing over.
Surface 9 with everything else 10 and good centering: a chance, with some risk.
Front centering between 52.5 and 55, the back between 72.5 and 75, or a single 9 in Edges or Corners: borderline.
Front centering past 55/45, the back past 75/25, ACE Centering 9, an 8, or more than one 9: probably not a PSA 10.
A guide to a slab's chances, not a promise: the new grader grades the card in hand, front and back. CrossCheck isn't connected with any grading company or eBay.
Know if it'll cross before you buy
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