Why Z and S shapes cause board fragmentation
Straight lines and solid squares fit neatly into rectangular coordinates. In contrast, Z and S polyominoes have staggered offsets that leave empty cavities on both sides.
Dropping a Z-piece in the center of the board in <a href="https://apps.aagyasharma.com/blockflow/">Block Flow</a> is one of the most common causes of board gridlock.
The Perimeter Wall Flush Technique
Always dock Z and S shapes flush against an existing wall of blocks so that one of the cavities is absorbed by the border. Pair complementary shapes to complete a solid 2x3 block.
Experience BlockFlow
A calm, colourful block puzzle with handcrafted levels. Fit each piece, clear lines, use strategic boosters, and play at your own pace.
Frequently Asked Questions
What if there is no wall to dock a Z-piece?
Place it along the bottom or top edge, and use your next turn to clear a line intersecting its protruding block.