Cordingley puzzle 101 #chess

Black to play and win

Solution

White's queen is off-side, and LPDO; black's queen and bishop battery pressurise g2, but the Ne3 is a good defender. The white queen is a bit limited in space ( in a potential net using Purdy's language) but instinct says that trapping the queen is unlikely to be the solution. So, instead, try to remove the Ne3: 1…Bd4 does nothing, so instead 1…Rb2! and once seen, it is clear this is the solution. All that needs to be seen are that if the bishop captures the rook, it is in LPDO position, so that Qe2 or Qd2 will double attack it and g2. Calculation of a few further lines, such as Bh4 hitting Rf2, with g3 opening the a8-h1 diagonal, is sufficient work.

Not too hard, but nice enough.

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