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A1E4: UNTIE
The target must be tied to the rope ('the X is not tied'). It then goes to whoever holds the rope.
A1E4 LD IX,($B5F8) IX = the target's own record
A1E8 LD A,(IX+$01) Is it actually held by the rope (object 18)?
A1EB CP $12
A1ED LD HL,$AF84 "the X is not tied."
A1F0 JP NZ,$72D4 No: say so and stop
A1F3 CALL $9C99 Dry run? Then stop here: it would work
A1F6 LD A,($C256) A = whoever holds the rope itself
A1F9 LD (IX+$01),A The target now belongs to them too
A1FC RET
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