Invisible Walls

by Jesse Gelles and Matt Gruskin

Answer: RATIONAL THOUGHT
Problem: April Fool’s Day

Solvers are given ten Nurikabe puzzles to solve. The name of the puzzle is a reference to Japanese mythology and the namesake of the puzzle type. Additionally, the use of invisible, bumping, and feeling in the flavor text clue the use of Braille. In the center of each grid is a highlighted 2 × 3 box which will contain a valid Braille character when the Nurikabe is solved. In the given order, the ten Braille characters provide the instruction MAKE A STACK. When the ten grids are stacked into a 10 × 10 × 10 cube, solvers should look at the cube faces (clued by sidestep in the flavor text) where the wall patterns will spell the answer: RATIONAL THOUGHT.

M

2		1						2
						3

		5					3
1	1
				3
2			3		1

							5
1				6				1

A

2			1		1			3

		3					3
5					5			1
						2
								1

	4			3				1

1		2			1	4		1

K

2				1		3
	2		2
1					2	2
				5

						1
			6		4
						1
		3
1				4		1

E

2		1		1

	3		1		6	2
				1
1
				3		1
2	3				4
		1				1
	2			4
1					1	1

A

2			5		2	3

	1						2

1						4
					5		1
2

				6
1		5			1	1	1

S

3		2			1

		3
				7			4
					4


	1		5		1
				1		3	5
			5

T

	2		1		3		4

		3

5	3
			1				5
		4
						1
		3		4
4						2

A

5	2		1		1

	4	1			7

		5			3
							1

	1		3			2
6
				3		2

C

		2	1		1

6		6					4
	1

	1		6		3
7				4
	1

				3		2

K

					1				1
	6		1
		6		1		4


					4
6				1				5
						1			1
				3			2

Cube Faces