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Die Schwalbe

No. 235, February 2009

14001 - Roberto Osorio, Jorge Joaquin Lois

Die Schwalbe 235, February 2009

[2b3nr/1ppp3p/1b6/5p2/3k4/4qr2/PPPPPpPP/RNBQKBNR]

15+13. Shortest proof game in 15.0 moves

[2b3nr/1ppp3p/1b6/5p2/3k4/4qr2/PPPPPpPP/RNBQKBNR]

Solution


14002 - Valeri Liskovets

Die Schwalbe 235, February 2009

[3N3k/2p1pQ2/8/8/8/2K5/8/8]

3+3. #4 Post factum, retrovolages

[3N3k/2p1pQ2/8/8/8/2K5/8/8]

Solution


14003 - Klaus Wenda

Die Schwalbe 235, February 2009

[3Q4/1B1N4/3Nkb1r/8/4P1b1/4R3/8/R1rqK3]

8+6. -4 & s#1, Proca retractor, anticirce, magic square f2

[3Q4/1B1N4/3Nkb1r/8/4P1b1/4R3/8/R1rqK3]

Solution


14004 - Bernd Gräfrath

Die Schwalbe 235, February 2009

[r1bq1r2/ppppp1kp/5n1b/5K2/6n1/4Q3/PPPPPP1P/8]

9+14. Add 2 pawns for #1, Grid chess

[r1bq1r2/ppppp1kp/5n1b/5K2/6n1/4Q3/PPPPPP1P/8]

Solution


14005 - Bernd Gräfrath

Die Schwalbe 235, February 2009

[r1bqkb1r/pppppppp/8/8/5P2/5N2/PPP3PP/RNB1QRK1]

13+14. Shortest proof game in 9.5 moves (Bichrom chess)

[r1bqkb1r/pppppppp/8/8/5P2/5N2/PPP3PP/RNB1QRK1]

Solution


14006 - Andreas Witt

Die Schwalbe 235, February 2009

Dedicated to Herbert Ahues' birthday

[8/2P2PP1/8/3R4/8/8/8/8]

4+0. White plays 6 moves so that he has a maximal possible moves in the resulting position. How many moves are that?

[8/2P2PP1/8/3R4/8/8/8/8]

Solution


14007 - Andreas Witt

Die Schwalbe 235, February 2009

Dedicated to Herbert Ahues' birthday

[8/8/8/P6p/2P4k/K3p3/8/8]

3+3. White and black play 2 moves (white starts). How many possible move combinations are there?

[8/8/8/P6p/2P4k/K3p3/8/8]

Solution


14008 - Alain Brobecker

Die Schwalbe 235, February 2009

Which unique monochromatic proof game ends with 5...BxN#?

Solution


14009 - Claudius Gottstein

Die Schwalbe 235, February 2009

Construct a position with only white rooks, in which exactly 45 squares are observed. How many positions are there?

Solution