Penicillin was discovered because a Petri dish was unchecked over the summer of 1928. With this hint in mind please try to find white’s best move.

The Crystal Palace forward recently took time out of FA Cup final preparations to win a chess tournament. So is he any good?

Pragg won with ease and looks poised for more. Meanwhile D Gukesh, the youngest-ever world champion, had to be content with a draw for the second day running against Deac Bogdan-Daniel of Romania.

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