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Retroanalyse im Schach

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Meisterwerke

in der Retroanalyse

20 - Dr. Niels Høeg

Die Schwalbe, 1933

[r1b1k3/p2p2pp/p1pp2p1/8/5Q2/7P/PPPPP2P/4K2R]

10+11. Matt in 3 Zügen

[r1b1k3/p2p2pp/p1pp2p1/8/5Q2/7P/PPPPP2P/4K2R]

Lösung

Here, castlings are mutually exclusive. To see this assume, by way of contradiction, that both sides may castle. Then wQ and wQR have been captured by bNs (together with the wQB) and wQf4 is the promoted wPf2 on c8 or b8. So that bl. caps f7xg6, b7xa6, e7xd6 consumed the 2 wNs and the wBf1. There are now three cases:

Mate in 3 is with 1. Qxd6!! (threat. 2. Rf1 & 3. Rf8#) Bb7 2. O-O !! (not 2. Rf1 ??) forbidding the now-illegal defense 2 ... O-O-O??, and allowing 3. Rf8#.


Solution by Philippe Schnoebelen