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Retroanalyse im Schach

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Meisterwerke

in der Retroanalyse

16a - W. Keym

Die Schwalbe, 1971

1./2. Preis im Ceriani Memorial Tournier

[5r1n/4N1P1/QP1PBb2/1p1p1Kp1/1Pk1P1P1/p1PbpPpq/5n2/N1R5]

14+13. Matt in weniger als einem Zug.

[5r1n/4N1P1/QP1PBb2/1p1p1Kp1/1Pk1P1P1/p1PbpPpq/5n2/N1R5]

Lösung

There are 8 possible en-passant captures half-finished.

So the only legal en-passant capture was f4xg3. So Black mates in 1/2 by removing the white pawn on g4.


Solution by Philippe Schnoebelen


16b - W. Keym

Die Schwalbe, 1971

1./2. Preis im Ceriani Memorial Tournier

[r6r/P7/1P6/P1P3P1/p1P1q1p1/1P2p1N1/B3N3/R6R]

12+6. Füge beide Könige hinzu, dann Matt in weniger als einem Zug!

[r6r/P7/1P6/P1P3P1/p1P1q1p1/1P2p1N1/B3N3/R6R]

Lösung

The white pawns on the queenside captured nine times, these are all the missing black pieces. This also means that the g5 pawn is the original g-pawn. Black captures are b5xa4, [h/f]5xg4 and gx[h/f]. The captures on a4 and g4 are on white squares, so the missing white bishop was captured by the g-pawn. This also means that the white h-pawn promoted before it got captured. This means that the capture on g4 was done by the black h-pawn. So the black f-pawn promoted on f1, breaking both white's castlings. The promotion on h8 breaks black's kingside castling. So the only castling allowed in this position is the black queenside castling.

Add the white king on d6, and the black king on c8, and mate with 'finish 000'


Solution by Werner Keym