Classification target LinkedIn Crossclimb #804. Ladder width: 4. Middle samples: BONE, BOND, BEND, BEAD, DEAD. Combo label: "A two-word idiomatic phrase that describes a completed agreement that cannot be changed.". Full chain: DONE → BONE → BOND → BEND → BEAD → DEAD → DEAL.
Middle phase answers: "Radius or ulna, for example" = BONE; "Last name of fictional spy James (007)" = BOND; "Flex a joint like an elbow or knee" = BEND; "Round object that might be part of a necklace, or a drop of sweat" = BEAD; "Play ___ (lie on the ground without moving)" = DEAD.
Ordering phase: the valid middle chain is BONE → BOND → BEND → BEAD → DEAD. This permutation is the only valid one-letter chain for these answers.
Transition 1: D→B at the first letter (DONE → BONE).
Transition 2: E→D at the fourth letter (BONE → BOND).
Transition 3: O→E at the second letter (BOND → BEND).
Transition 4: N→A at the third letter (BEND → BEAD).
Transition 5: B→D at the first letter (BEAD → DEAD).
Transition 6: D→L at the fourth letter (DEAD → DEAL).
Ladder result: DONE → BONE → BOND → BEND → BEAD → DEAD → DEAL. Classification: unique middle order.