Recently, I have been dabbling in composing a few retrograde chess puzzles. This one, I feel, turned out quite nice: In the game leading to the position below, White somehow lost both their rooks and knights. For each of them, can you determine where they were taken and by which piece? (Bonus po...

Friends, we have a towering puzzle in which integers are equated to ordered pairs of colors. The ordered pairs are based on the nine colors given below: White, yellow, blue, red, violet, orange, green, maroon, black Hints: The numbers are given in base ten, but the color coding does not correspo...

It's a little-known fact that the guards on Liar Island have to continue their slavish devotion to the individual rules dictating the veracity of their statements. Of course, some always lie, and some always tell the truth, but most have a little more nuance. I had escaped from a previous encount...