# MiniMax H3 pulley prompt: connect opposite motion at both rope ends

Keep a single supported rope responsible for the relationship between two moving endpoints. A plausible motion of just one block is not enough to show the intended connected system.

Original synthetic practice still, not a generated result. No model run has been performed.

Files: first-frame.png (1024×1024 actual first-frame input), first-frame.svg (editable geometric design source; do not upload as if it were PNG), prompt.en.txt / prompt.zh.txt, acceptance.blank.csv (all observations empty), task-definition.json and RIGHTS-REVIEW.txt.

## Generator

Use MiniMax H3 base image-to-video. Turn on Add end frame to expose First Frame, upload first-frame.png only, and leave Last Frame empty. Fast requires a pair and is not covered. Choose only options offered by the current interface; opening it does not submit.

## Starting state

The drawing shows one overhead support, one fixed pulley axle, a continuous rope over the wheel and two attached blank blocks. The left block starts lower than the right. Both rope-to-block attachments are visible and both loads have space to move.

Use the top support and axle as fixed anchors. Trace the rope from the left attachment, over the pulley and down to the right attachment. The left end can descend while the right rises without ever swapping their relative height; a small move does not require a crossover.

## Steps

1. Trace the entire visible rope before submitting. A replacement drawing should show actual endpoint connections and enough space above and below both blocks.
2. Request one short paired displacement, not a bounce, counterweight calculation or a full cycle. Keep both loads in the same fixed shot so a missing endpoint cannot be hidden.
3. In a later result, compare both attachments over the same frames. Record the left-down/right-up relationship and then inspect rope continuity around the upper wheel.

## Acceptance

- The support and pulley axle remain in the same positions.
- The left block descends while the right rises during the same visible interval.
- Both original attachments remain joined by one continuous taut rope, with no extra loop or load.
- The ending retains two visible loads within the frame; a height reversal is neither requested nor required.

## Limits

This is a visible rope-relationship exercise, not a mass-balance calculation, lifting plan, safety demonstration or measured efficiency test. The H3 method is untested.

Read prompt.en.txt before submitting. No pass results or output video are included.