Puzzles offer a window into how our minds work

Sir, - I read with envy the recent laments about the occasional difficult clue in the Simplex crossword. I possess a highly dyslexic, engineering-wired brain and if I manage to complete more than 50 per cent of Simplex, I count it as a personal triumph.

By contrast, it is a rare day indeed when I fail to complete over 80 per cent of Crosaire. Go figure – quite literally. - Yours, etc,

DANIEL O’CONNELL,

Winchester,

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After all these years in Berlin, I’m back in Dublin as a tourist in my hometown

England.

Sir, - As a decades-long devotee of Simplex, I have developed a complex about talking to the uninitiated about my daily ritual. This is because the title of the puzzle gives them the wrong impression as to just how complex Simplex is. - Yours. etc,

BRIAN QUIGLEY,

Drumcondra,

Dublin 9.