Sudoku 9: Classic Sudoku

Today I'm posting the first Classic Sudoku on my blog. As it is the first one I've kept it easy.

Rules: Place a digit from 1-9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box.

Sudoku 8: Sum Frame Sudoku

Rules: Place a digit from 1-9 in each empty cell so that each digit appears exactly one in every row, column and 3x3 outlined box. Additionally the numbers outside represent the sum of first three numbers in corresponding direction.

Sudoku 7: Little Killer Sudoku

Rules: Place a digit from 1-9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box. Additionally numbers with arrows indicate the sum of the numbers in that direction. 

Sudoku 6: Trampoline Sudoku

With just 3 days left for Indian Sudoku Championship, preparations must already be in full swing. This time ISC features a new variant called Trampoline Sudoku.

There aren't any Trampoline Sudoku for practice. So, I've created one for ISC practice.

Rules: Place a digit from 1-9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box. Additionally, numbers on a trampoline (all the cells the shape is part of - light shaded colored cells) will jump vertically to

the height of the corresponding number and then at this new height, each number must reach (be orthogonally or diagonally adjacent to) two copies

of itself, one to the left and one to the right.

Sudoku 5: Odd-Even Sudoku

Rules: Place a digit from 1-9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box. Additionally cells shaded with circles will have odd numbers and those with squares will have even numbers.

Theme: O-E

Sudoku 4: Spiral Sudoku

India is hosting the ongoing 7th round of World Sudoku GP 2018 and Spiral Sudoku is a part of this round. So, I thought to create a Spiral Sudoku. Practise this and then do participate in the GP too.

Rules: Place a digit from 1-9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box. Additionally, exactly 3 of the 3x3 boxes have the property that their eight perimeter cells are in strictly increasing order with starting cell and direction unspecified. The 3 spiral boxes, and the starting cell and direction in these boxes need to be identified as a part of solving. 

Sudoku 3: Disjoint Groups Sudoku

Rules: Place a digit from 1-9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box. Additionally, no digit can appear in the same position in different 3x3 boxes.