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This is an example of a completed SudokuXV grid. A SudokuXV puzzle uses the same base rules of Sudoku,
but in addition some cells will have a 'V' or a 'X' between them. In the case of a 'V', these two
cells will add to 5, and in the case of a 'X', these two cells will add to 10.

If you look at this puzzle, you can see that these rules are satisfied.

This is an example SudokuXV starting grid, and I have highlighted some cells that we can either fill in,
or insert some pencil marks. In the topmost cell, it is linked to a '4' by a 'X' symbol. The 'X' tells
us that these two cells must add to 10, so the highlighted cell must be a '6'.

Slightly lower we have another highlighted cell linked by a 'V' to a 1. These two cells must add to 5,
so the highlighted cell must be a 4.

At the bottom of the puzzle we have two highlighted cells linked with a 'V'. We know these two cells
must add to 5, and there's only two ways we can do that, either 1+4=5, or 2+3=5. Because of the 1s and
4s already in these two rows we know that we can't have the combination of 1 and 4 in these cells. We
can then fill in the pencil marks of 2 and 3 for these two cells.

This is another starting SudokuXV grid, can you fill in the highlighted cells? The set of 3 cells in the
bottom right can be filled (i.e. not with pencil marks), hint: Consider the 'V' clue first, and then
consider what possibilities that would leave for the 'X' clue.

Nonograms

Wordsearch

Nurikabe

Jigsaw Sudoku

Samurai Sudoku

Sudoku

Mathdoku

16×16 Giant Sudoku

Hitori

X-Sudoku

Kids Sudoku

12×12 Giant Sudoku

Hyper Sudoku

Futoshiki

Towers

Killer Sudoku

Greater Than Sudoku

Maze

Arrow Sudoku

Center-Dot Sudoku

Consecutive Sudoku

Odd-Even Sudoku

SudokuXV

Network

Minesweeper

Hashi

SlitherLink

TicTacToe

CellBlocks

Suguru

Kakuro

Train Tracks

Battleships

Masyu

Light Up

Shakashaka

Fillomino

Numberlink

Suko

SetSquare

Dominosa

Spiral Galaxy

Hidoku

Star Battle

Kakurasu

Ballsort

Picross

Solitare

Pairs

Four in a row