The crown appears on all banknotes, of course. Alan Turing was the co-creator of Turochamp, possibly the first chess computer program – although computers at the time were not powerful enough to run it!

Place each of the remaining seven pieces in a square of their associated colour so that no piece can capture any other.

Can you identify the holder of the crown?

Solution

Start with the Queen. There is only one possible position, d7 (using standard chess notation).

a7, b7, d6, g8, h8 are impossible as they would be attacking the King. This leaves d3 and d7.

d3 is impossible as it rules out all the squares for the orange Knight therefore the Queen must be on d7. You can then rule out all squares attacked by the Queen from this position.

Next is the yellow Knight. a6 are b6 impossible due to attacking the King and the Queen so it must be on g5.

You can then rule out all Bishop and Knight squares that attack a piece you’ve already placed.

The rest is straightforward.

The answer is FJOLNIR.