Original sentence: Ex-world championship finalist Nigel Short wrote each Sunday for the Daily Telegraph (taken over by the daily chess columnist, Malcolm Pein) but has switched to The Guardian.Raymond Keene's column appears daily in The Times and Sunday Times.The Times sponsored the world championship match in 1993 between Garry Kasparov and Nigel Short
Edited sentence: (The Times, significantly, sponsored the aforementioned world championship match in 1993 between Garry Kasparov and Nigel Short).Arguably the most popular chess column currently is Raymond Keene's, published every day without fail in The Times and Sunday Times.Ex-world championship finalist Nigel Short also wrote until recently each Sunday for the Daily Telegraph (recently taken over by the daily chess columnist, Malcolm Pein), but it is only really these two newspapers which keep a strong chess tradition going in Britain