Solution to Sudoku no 709

Sudoku no 709 (Moderate)

Our younger son created this puzzle using a Javascript puzzle which he wrote himself:

Sudoku grader and solver

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Chess Solution no 12

38. Re7!

In the game, black resigned after this move.

It might have continued as follows:

38. Re7!   Qd1+

39. Qxd1   a5

40. Qd4+   Rf6

41. Qxf6+   Kg8

42. Qg7#

or

38. Re7!   Rf7

39. Rxf7   Qd1+

40. Qxd1   Kg8

41. Rxa7   g5

42. Qd8#

or

38. Re7!   Rf5

39. Qd8+   Qe8

40. Qxe8+   Rf8

41. Qxf8#

etc.

Chess Puzzle no 12

This position is from Chkhaidze v. Yeritsyan, Batumi Municipality Cup, Georgia, 2023. It is white's turn to play. What is his best move?

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Solution to Sudoku no 708

Sudoku no 708 (Moderate)

Sudoku grader and solver 

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Multi Player Mode on the Live Sudoku Site

The Live Sudoku site now has a Multi Player mode so I decided to try it out. You can see it yourself here. I used my Facebook login to start with and scrolled down to the list of games played recently, which looked like this:

Games were being played every few minutes so it was clear that this option has become popular very quickly. I looked at the times taken for each game and, as I am quite slow at solving sudokus, I realised that I could not compete with any of the recent participants so I clicked on the

button. This allowed me to play against the LiveSudoku robot at a level to match my solving ability. As the match progressed I was able to check my progress as you can see below:

It is obvious to me that a lot of thought has gone into creating this multi player mode so if you enjoy competing against others when solving sudokus, you should give it a try.