September 9th is International Sudoku Day! So, today’s puzzle is Jigsaw Sudoku. The rules are pretty much the same as regular Sudoku, with irregular regions instead of 3×3.
Basic Sudoku techniques can be found in our Solving Guide.
Want to try it online? Click here!
The completed grid. I hope you enjoyed it!
Sukaku is an interesting variant of Sudoku. Rather than the standard format of revealing a few known numbers, you are instead given pencilmarks. As a matter of fact, another name for this puzzle is Pencilmark Sudoku. Otherwise, normal Sudoku rules apply. Fill the grid with 1-9 in such a way that no row, column, or 3×3 region contains a duplicate.
On this day in 1798, the US Congress commissioned the first federal lighthouse. Then, 200 years later, Ronald Regan created National Lighthouses Day on August 7th. Interestingly, this law made many lighthouse grounds open to the public.
Hidden somewhere in this grid are a group of single-cell tugboats. Can you use the clues provided by the lighthouses to find them all?
I first saw a Detective Chess puzzle about a year ago, and the concept intrigued me. Invented by Jaime Poniachik in the late 1970s or early 80s, and received notoriety in Martin Gardner’s Puzzles from Other Worlds, published in 1981. Today is International Chess Day, so this seemed an appropriate puzzle. Can you figure out which chess pieces goes where?
One popular table decoration represents the autumn harvest. The cornucopia, or “Horn of Plenty,” has been used as a symbol of abundance since ancient Greece. Now, it’s usually shown filled with fruits and nuts, and is commonly associated with Thanksgiving in North America.
Today’s puzzle is a small crossword, playable right here on this page! All of the answers are words formed with letters found in the word “CORNUCOPIA.” No letters are used more than once in an answer, unless they actually appear multiple times in our theme word. Good luck!
No, it’s not an early Halloween puzzle – today is World Dracula Day! In 1897, Bram Stoker published his infamous novel. Interestingly, he didn’t make much money from it, but in 1922, the film Nosferatu inflamed interest in the character. Stoker’s widow sued for copyright infringement, and Dracula became the iconic vampire, even though he wasn’t the first.
Today, you’re trapped in a castle with a coven of vampires, and you must escape. But Dracula is clever – there are walls everywhere! Can you discover the secret doors and the path of escape?
