Test your chess: Reitstein problem 115

Black to play and win

M Bleiden v BE Slegheim 1912

Solution

I saw this one on inspection, 1…Rf1+! noting that after the forced 2 Qf1 (2 Rg1? 3 Qf3mate) the Qf1 is LPDO so that 2…Ng3+ wins it after 3 Rg3 Qf1+, or if 3 Kg1 Nf1 the bishop is en prise. There is a sweet point that if then say 4 Bc1, 4…Ne3 5 Rg3 (forking the N and R) is met by 5…Qf1 mate.

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