India, March 17 -- Some weeks ago, a reader wrote to me that Einstein puzzles were becoming frequent and repetitive in Probelmatics. While I appreciate the reader's keenness on variety, the fact remains that Einstein puzzles are popular, fun to solve and, in my opinion, dserve to appear at some sort of frequency.

What we can do, however, is try and make them less repetitive. I have tried to create one with a slightly higher level of diffficulty than previous ones, but readers are always the only judges of difficulty. As time progresses, I shall try and innovate on my Einstein puzzles further. In the meantime, do have a shot at the following and let me know if it's more challenging than the countless puzzles you have solved previously.

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