# Puzzle No. 509: Triomino Sudoku [Daily League]

I’ve got wayyy too much to do these days, so I’ve pretty much stopped any regularity on this blog. I might make the rare post though, like this one. I was a little bored of work and had some time so quickly explored this variant that’s part of the Indian Sudoku Championship which will be held online on LMI in about 13.5 hours. This one is pretty difficult (as are all variants I randomly and quickly post here when bored), but has some nice steps to get started.

Remember that you can solve the puzzles from the League online on the Sudokucup Guest League page with a 24h delay (though I’m not yet sure if this one can be supported there, but take a leap of faith, maybe it will be!).

Rules – Place a digit from 1 to 6 into each empty cell or blacken the cell so that each digit appears exactly once in every row, column, and outlined 3×3 region along with three black(shaded) cells. Each black(shaded) cell should be part of an orthogonally connected group of three blackened(shaded) cells (a triomino). No two triominoes can share an edge.

Enjoy!

P509

# Puzzle No. 508: Palindrome Sudoku [Daily League]

Remember that you can solve the puzzles from the League online on the Sudokucup Guest League page with a 24h delay.

Rules – Follow regular Sudoku rules. The numbers formed by the digits on the gray lines are palindromes, that is to say, they can be read equally in both directions.

Enjoy!

# Puzzle No. 506 & 507: Trio Sudoku, Anti-Diagonal Sudoku [Daily League]

The Trio Sudoku is actually last week’s puzzle. I’d posted it on facebook but hadn’t posted it here. Thats rectified now. Its not the usual Trio Sudoku, but I prefer this slight tweak because it gives more to work with overall.

Remember that you can solve the puzzles from the League online on the Sudokucup Guest League page with a 24h delay. The Anti-Diagonal is today’s offering and will be the one appearing tomorrow on the online solver.

Also, a new puzzle genre I thought of debuted on GM Puzzles this past week. Its called Balance Loop. Have a go at these!

Balance Loop 1.

Balance Loop 2.

Balance Loop 3.

Rules for 506 – Follow regular Sudoku rules. Additionally, Circles must contain only digits 1, 2 and 3. Small squares must contain only digits 4, 5 and 6. Diamonds must contain only digits 7, 8 and 9.

Rules for 507 – Follow regular Sudoku rules. Additionally, each marked diagonal must contain exactly three distinct digits.

Enjoy!

# Puzzle No. 505: Anti-Clone Sudoku [Daily League]

I’ve had enough of Saturdays where I forget its a Saturday. The days I remember are usually Tuesday, Thursday and Sunday, for no specific reason other than that I’m weird. So, I’ve switched Sunday with Rajesh Kumar for the Daily League and I’m hoping that means I remember to post regularly.

Remember that you can solve the puzzles from the League online on the Sudokucup Guest League page with a 24h delay.

Rules – Follow regular Sudoku rules. The digits at the same locations on each shaded area must sum to 10. Shaded areas cannot be rotated or reflected.

Enjoy!

# Puzzle No. 504: Search 9 Sudoku [Daily League]

I’m back to the league this week and I hope that I’ll be back regularly now. Anyway, Search 9 Sudoku for today.

Remember that you can solve the puzzles from the League online on the Sudokucup Guest League page with a 24h delay.

Rules – Follow regular Sudoku rules. Additionally, each arrow points to the 9 in the respective row or column. The number in the cell with the arrow is the distance from the cell to the 9 in this row or column.

Enjoy!

P504

# Puzzle No. 503 – Diagonal Sudoku [Daily League]

I’m hoping for a bit of free time at the end of the year, I might put up a detailed post about… stuff, then. For now, Sudoku! This might be hard but don’t take my word for it.

Remember that you can solve the puzzles from the League online on the Sudokucup Guest League page with a 24h delay.

Rules – Follow regular Sudoku rules. Additionally, each marked diagonal must also contain all digits from 1~9.

P503 – Diagonal Sudoku

# Puzzle No. 501 & 502 – Killer Sudoku & Extra Region Sudoku [Daily League]

Now that I’ve posted my 500th puzzle, I am sharing the Sudoku I contributed to the Daily League last Saturday, along with the Sudoku I’m contributing for it today. I didn’t post the Killer last week on my blog because I wanted the space saved for the special puzzle.

Remember that you can solve the puzzles from the League online on the Sudokucup Guest League page with a 24h delay.

Common Rules – Follow regular Sudoku rules.

For Killer The number in the top-left corner of a dotted cage is equal to the sum of this cage’s digits. No digit can repeat within a cage.

For Extra Regions – Each group of nine grey cells must also contain the digits 1 to 9.

Enjoy!

P501 – Killer Sudoku

P502 – Extra Region Sudoku

# Puzzle No. 499 – Arrow Sudoku [Daily League]

This puzzle has a nice application of group-thinking… I think. The solving path is also pretty narrow. Not something I’d advise for beginners.

Remember that you can solve the puzzles from the League online on the Sudokucup Guest League page with a 24h delay.

Rules – Follow regular Sudoku rules. Additionally, the number in a circle is the sum of the digits which are covered by its arrow. For circles with multiple arrows, apply the rule for each arrow separately.

Rated – Hard.

Enjoy!

P499

# Puzzle No. 498: Next To Nine Sudoku

This was posted in the Daily League last week but I didn’t get the time to post it here. I’ll finish up the recaps today too. I think.

Rules – Follow regular Sudoku rules. Additionally, the clues outside the grid indicate the numbers to be
placed in the cells before and after the cell containing 9 in the corresponding direction.

Enjoy!

By Prasanna Seshadri Posted in Sudoku

# Puzzle No. 497: Odd-Even Count Sudoku [Daily League]

The WSC/WPC Recaps will resume tomorrow.

Remember that you can solve the puzzles from the League online on the Sudokucup Guest League page with a 24h delay.

Rules – Follow regular Sudoku rules. Additionally, An even number placed in a cell with a circle indicates the number of even numbers placed in the surrounding 8 cells. An odd number placed in a cell with a circle indicates the number of odd numbers placed in the surrounding cells. Numbers placed in cells without a circle may have either of these properties.

Enjoy!