historical Level 1821 board with a 1:50 timer, stepped upper-left wall, central blue/teal pieces, and bottom purple/yellow/cyan lanes
Color Block Jam Level 877 Solution
Match the 877/1821 layout first: historical Level 1821 board with a 1:50 timer, stepped upper-left wall, central blue/teal pieces, and bottom purple/yellow/cyan lanes. Follow the checkpoint order, keep the main lanes open, and confirm completion around 1:54.
Compare your opening board
Which video shows the Level 877 solution?
11 timestamped steps
Step-by-step solution
Use each checkpoint to confirm that your board still matches the walkthrough.
Key checkpoints
Use these moments to confirm that your board still matches before continuing.
| Time | What to confirm |
|---|---|
| 0:04 | The source opens on historical Level 1821 for current Level 877, with timer 1:50 and no difficulty badge. |
| 1:54 | Around 1:54, the first run reaches Level Complete after the board clears. |
| 2:00 | Around 2:00, Replay begins on the same Level 1821 layout with the timer reset to 1:50. |
| 2:32 | Around 2:32, the replay mid-opening shows the right-side vertical corridor opened. |
| 3:20 | Around 3:20, the red block clears near the top red exit and the board is substantially open. |
| 3:50 | Around 3:50, the replay reaches Level Complete again. |
Confirm the source shows historical Level 1821 for the current Level 877 mapping, with timer 1:50.
Checkpoint: The source mapping is clear before you follow the route.
Watch at 0:04Open the upper-middle space by shifting the orange horizontal and central blue vertical pieces.
Checkpoint: The center has a visible gap.
Watch at 0:14Keep freeing the right-side vertical corridor instead of trapping it with the teal key block.
Checkpoint: The right side has a clear vertical path near the green exit.
Watch at 0:32Move blue pieces through the newly available right and top lanes.
Checkpoint: Blue blocks no longer match the opening cluster.
Watch at 0:40Preserve space around the upper-right teal key-shaped block while shifting it across the right side.
Checkpoint: The center lane stays usable.
Watch at 1:00Wait on the left red vertical until the middle and bottom blockers have been rearranged.
Checkpoint: The red block is not forced too early.
Watch at 1:10Open the bottom row before the final few color blocks.
Checkpoint: The bottom purple and yellow gates are exposed.
Watch at 1:20Continue clearing around the lower middle so red and blue pieces can leave.
Checkpoint: A large open middle appears.
Watch at 1:30Route the red vertical block out once the top and left path is available.
Checkpoint: Red clears near the top red exit.
Watch at 1:40Resolve the right edge after red clears, then clear the remaining bottom blockers.
Checkpoint: Only a few blue/cyan pieces remain.
Watch at 1:52Finish the last pieces through their matching exits.
Checkpoint: Level Complete confirms the first-run clear.
Watch at 1:54
Which evidence verifies the Level 877 walkthrough?
Each row links a visible gameplay fact to the walkthrough frame used to check it.
| Fact | Source role | Timestamp | Checked |
|---|---|---|---|
| The source opens on historical Level 1821 for current Level 877, with timer 1:50 and no difficulty badge. | CherieGaming walkthrough evidence | 0:04 | July 16, 2026 |
| Around 1:54, the first run reaches Level Complete after the board clears. | CherieGaming walkthrough evidence | 1:54 | July 16, 2026 |
| Around 2:00, Replay begins on the same Level 1821 layout with the timer reset to 1:50. | CherieGaming walkthrough evidence | 2:00 | July 16, 2026 |
| Around 2:32, the replay mid-opening shows the right-side vertical corridor opened. | CherieGaming walkthrough evidence | 2:32 | July 16, 2026 |
| Around 3:20, the red block clears near the top red exit and the board is substantially open. | CherieGaming walkthrough evidence | 3:20 | July 16, 2026 |
| Around 3:50, the replay reaches Level Complete again. | CherieGaming walkthrough evidence | 3:50 | July 16, 2026 |
Common mistakes
- Treating this source as visually proving Level 877; the gameplay badge shows Level 1821.
- Blocking the right-side vertical corridor too long.
- Clearing obvious large pieces before opening the bottom exits.
Frequently asked questions
Is this guide for Level 877 or 1821?
The project source maps it as Level 877 (1821), while the gameplay badge visibly shows Level 1821.
Should Level 1821 become a separate guide?
No. It points to the same source and layout and should remain a duplicate historical mapping.
Does the video show Hard or Very Hard?
No visible Hard or Very Hard badge appears in the reviewed frames.
Wrong layout?
This guide matches current Level 877 when the source/gameplay shows Level 1821 with historical Level 1821 board with a 1:50 timer, stepped upper-left wall, central blue/teal pieces, and bottom purple/yellow/cyan lanes. If your opening board, timer, exits, or counters differ, use it only as a reference.
Wrong level?