Checkmate to MurderOn a dismally foggy night in Hampstead, London, a curious party has gathered in an artist's studio to weather the wartime blackout. A civil servant and a government scientist are matching wits in a game of chess, while an artist paints the portrait of his characterful sitter, bedecked in Cardinal's robes at the other end of the room. In the kitchen, the artist's sister is hosting the charlady of the miser next door. When the brutal murder of said