Where does r4c8=8 go?

It is the 4x2 rectangle r4c7:r7c8; the rightmost c9 column belongs to the separate area-7 wall.

What is the area-10 shape?

The r2c3=10 clue uses r2c2:r6c3, a 5x2 rectangle.

Sixteen rectangles cover all 99 cells in the persistent 11x9 solution.

MeowBlock! level guide

medium Target: 16 moves 11 colors

Solve the large MeowBlock! Level 37 by locking the lower-right 9 block and right 7 wall, then forcing the lower band and five central columns.

Anchor r10c8=9 and drag to r9c7, committing r9c7:r11c9 as a 3x3 rectangle with area 9.
Anchor r4c9=7 and drag to r1c9, committing r1c9:r7c9 as a 7x1 rectangle with area 7.
Anchor r10c5=6 and drag to r10c3, committing r10c3:r11c5 as a 2x3 rectangle with area 6.
Anchor r10c6=3 and drag to r9c6, committing r9c6:r11c6 as a 3x1 rectangle with area 3.
Anchor r7c4=4 and drag to r7c2, committing r7c2:r7c5 as a 1x4 rectangle with area 4.
Anchor r8c6=7 and drag to r8c3, committing r8c3:r8c9 as a 1x7 rectangle with area 7.
Anchor r8c2=8 and drag to r8c1, committing r8c1:r11c2 as a 4x2 rectangle with area 8.
Anchor r4c8=8 and drag to r4c7, committing r4c7:r7c8 as a 4x2 rectangle with area 8.
Anchor r3c8=6 and drag to r2c6, committing r2c6:r3c8 as a 2x3 rectangle with area 6.
Anchor r6c6=4 and drag to r4c6, committing r4c6:r7c6 as a 4x1 rectangle with area 4.
Anchor r9c4=3 and drag to r9c3, committing r9c3:r9c5 as a 1x3 rectangle with area 3.
Anchor r4c4=5 and drag to r2c4, committing r2c4:r6c4 as a 5x1 rectangle with area 5.
Anchor r4c5=5 and drag to r2c5, committing r2c5:r6c5 as a 5x1 rectangle with area 5.
Anchor r3c1=7 and drag to r1c1, committing r1c1:r7c1 as a 7x1 rectangle with area 7.
Anchor r2c3=10 and drag to r2c2, committing r2c2:r6c3 as a 5x2 rectangle with area 10.
Finish with r1c5=7 at r1c2:r1c8, a 1x7 rectangle with area 7.

Colors in this level:

Green, Orange, Yellow, Pink, Cyan, Purple, Lavender, Blue, Red, Lime, Mint

Do not shift the r4c8=8 rectangle right to r4c8:r7c9; it captures the separate r4c9=7 clue.
Do not replace the r2c2:r6c3 area-10 block with a 2x5 strip; it strands the center 5/5 columns.
Do not cut the r8c3:r8c9 area-7 bar while placing the lower 6/3/9 rectangles.

Start from r9c7:r11c9 and r1c9:r7c9 so the lower-right corner and right wall cannot drift.
Keep r8c3:r8c9 as a single area-7 bar above the lower 6/3/9 row.
Treat r2c4:r6c4 and r2c5:r6c5 as separate 5-cell columns beside the area-10 block.

Board notes 5 details

Layout: 11 rows by 9 columns, 99 cells. Clues: r1c5=7, r2c3=10, r3c1=7, r3c8=6, r4c4=5, r4c5=5, r4c8=8, r4c9=7, r6c6=4, r7c4=4, r8c2=8, r8c6=7, r9c4=3, r10c5=6, r10c6=3, and r10c8=9. No unknown clues appear.
Goal: Partition all 99 cells into sixteen rectangles: r1c2:r1c8 for area 7, r2c2:r6c3 for area 10, r1c1:r7c1 for area 7, r2c6:r3c8 for area 6, r2c4:r6c4 for area 5, r2c5:r6c5 for area 5, r4c7:r7c8 for area 8, r1c9:r7c9 for area 7, r4c6:r7c6 for area 4, r7c2:r7c5 for area 4, r8c1:r11c2 for area 8, r8c3:r8c9 for area 7, r9c3:r9c5 for area 3, r10c3:r11c5 for area 6, r9c6:r11c6 for area 3, and r9c7:r11c9 for area 9.
Opening: The video first commits r9c7:r11c9 area 9 and the right r1c9:r7c9 area-7 wall. It then builds the lower 6/3/4/7/8 band, followed by the right area-8 and center columns, with the left wall and top area-7 bar last.
Danger Zone: The area-8 clue r4c8 can be shifted to r4c8:r7c9, but that captures r4c9=7. Keep it at r4c7:r7c8. Do not shorten r2c2:r6c3 area 10 to a strip; the adjacent r4c4=5 and r4c5=5 columns need the remaining middle cells.
Mechanics: The 11x9 board is a full exact-cover partition with two long outer walls and a dense central chamber. Temporary colored previews appear during several lower and upper drags; the persistent sixteen rectangles define the solution.

Where does r4c8=8 go?
It is the 4x2 rectangle r4c7:r7c8; the rightmost c9 column belongs to the separate area-7 wall.
What is the area-10 shape?
The r2c3=10 clue uses r2c2:r6c3, a 5x2 rectangle.
How many rectangles solve Level 37?
Sixteen rectangles cover all 99 cells in the persistent 11x9 solution.