About Sliding Blocks #840
Sliding Blocks #840 was the puzzle for Tuesday, October 20, 2026, a medium one: a 4 × 5 tray that takes 45 moves at best. Everyone who played Sliding Blocks that day got the same puzzle, and it stays here to play for 60 days.
New to Sliding Blocks? The rules, tips and common questions are on the Sliding Blocks page, and How to Solve Sliding Block Puzzles goes into strategy.
Other days of Sliding Blocks
- Sliding Blocks #843, Oct 23
- Sliding Blocks #842, Oct 22
- Sliding Blocks #841, Oct 21
- Sliding Blocks #839, Oct 19
- Sliding Blocks #838, Oct 18
- Sliding Blocks #837, Oct 17
- Today’s puzzle, #851
Every day of the last 60 is in the puzzle archive.