Puzzle Parade: Nurikabe

Monday, 24 December 2018

Puzzle 300: Quattro Stagioni

General Rule: Shade some cells to form a single contiguous shape. The shape doesn't form any 2x2 squares anywhere, even between boundaries. The coloured squares represent windows, the pattern of shaded and unshaded cells in the solid window must be the inverse of the pattern of shaded and unshaded cells in the dashed window of the same colour. The orientation of which stays the same.

Top Left: Nurikabe Pentominoes

Each lettered cell is an island cell, the letter in it indicates the pentomino it is part of.
Each island contains exactly one lettered cell. All unshaded cells in the top-left are part of a pentomino.
Pentominos must be contained completely within the top-left area and don't connect to unshaded cells in other areas.

Top Right: Nanro Signpost

Each area must contain at least one shaded cell.
Numbers in some cells count the shaded cells in that area, however that cell may not be shaded upon completion.
Where two shaded cells connect across a boundary between areas, the number of shaded cells in those areas must be different.

Bottom Left: Large-Squares Tapa

Numbers on some cells indicate the number of consecutive shaded cells around that cell, if there is more than one number then there must be at least one unshaded cell between the shaded regions, "?" is wild and can stand for any number from 1 up to the number of surrounding cells.
Where clues are in large areas, they relate to all cells surrounding that area.
Cells with numbers can never be shaded.

Bottom Right: Easy as LITS

No two of the same tetrominos, including rotations / reflections are allowed to touch.
Letters outside the grid indicate the first tetromino encountered in the corresponding direction.

Monday, 19 November 2018

Puzzle 295: Nurikabe Pentominoes

Instructions

Theme: Full Set

Nurikabe Pentominoes Instuctions

Rules: The objective is to divide the grid into shaded and unshaded cells, subject to the following rules:

Each lettered cell is an island cell, the letter in it indicates the pentomino it is part of (tetrominoes used in the example below).
Each island contains exactly one lettered cell.
There must be only one stream, which is not allowed to contain "pools", i.e. 2x2 areas of shaded cells.

Monday, 8 October 2018

Puzzle 289: Windows Nurikabe

Instructions

Theme: Pinwheel

Windows Nurikabe Insructions

Rules: The objective is to divide the grid into shaded and unshaded cells, subject to the following rules:

Each numbered cell is an island cell, the number in it is the number of cells in that island.
Each island contains exactly one numbered cell.
There must be only one stream, which is not allowed to contain "pools", i.e. 2x2 areas of shaded cells.
The pattern of shaded and unshaded cells in the solid box must be the inverse of the pattern of shaded and unshaded cells in the dashed box of the same colour. The orientation of which stays the same.

Saturday, 14 February 2015

Each numbered cell is an island cell, the number in it is the number of cells in that island.
Each island contains exactly one numbered cell.
There must be only one stream, which is not allowed to contain run for 5 consecutive cells.

Thursday, 26 December 2013

Puzzle 216: Matryoshka Nurikabe

Rules: The challenge is to paint each cell black or white, subject to the following rules:

Each numbered cell is a wall cell, the number in it is the number of cells in that wall.
Each wall must contain exactly one numbered cell.
There must be only one stream, which is not allowed to contain "pools", i.e. 2x2 areas of black cells.
All centre squares, starting with the 2x2 square and working outwards produce gradually larger Nurikabes of their own.