Sudoku hits the streets in Skyscrapers Light, another installment of the Conceptis Light series. In this logic puzzle, the numbers on the outside of the grid tell you how many "buildings" are visible from that side of the grid, if each number inside the grid represented a building of that height. Are you streetwise enough to rebuild the city?

When a work has an excellent premise, it's always interesting to find variations on the theme. Haydn knew it. Beethoven knew it. Now Conceptis gets on board with another in their popular series of browser versions of pen-and-paper puzzles, and this time the focus is on perhaps the most popular remix of that ongoing phenom, Sudoku. Chain Sudoku Light Volume 1, designed with the same care as its fellow works, is a twisty variant that's very, very good.

Battle 60 new levels of Sudoku in this next installment of the Conceptis Light series of puzzle games. Offering up the same mixture of Sudoku puzzles from Mix Sudoku Light Vol. 1, only harder, this set of puzzles is not for the Sudoku novice or easily frustrated. If you're looking for a decent challenge that's the perfect length for a little break, solve a puzzle from Mix Sudoku Light Vol. 2!

Sudoku fans should rejoice with this new release from Conceptis. It contains a number of classic puzzles, along with several variations including Diagonal, Irregular, Chain, Odd/Even, and Multi. The sixty puzzles are over far too soon, but with such a well-done interface, the next volume is eagerly awaited.

Sudoku Combat is a browser-based multiplayer version of the popular puzzle game that offers a new experience for those that prefer a more competitive challenge. Just enter a user name, select a puzzle difficulty, and then choose to play against a friend or a random stranger. Then it's a race to the finish.