[Retros] Probleemblad 6-2006

[Joost de Heer]

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Peter van den Heuvel
Perseusstraat 21
7521 ZA  Enschede
THE NETHERLANDS
schaakbordje at gmx.net

R317 - Unto Heinonen
r1s1rk2/8/s7/K1P5/1P2P3/b1S2Sq1/PB1P1PPP/1bRQ1B1R (16+8)
+---a---b---c---d---e---f---g---h---+

|                                   |

8  -R   .  -S   .  -R  -K   .   .   8

|                                   |

7   .   .   .   .   .   .   .   .   7

|                                   |

6  -S   .   .   .   .   .   .   .   6

|                                   |

5   K   .   P   .   .   .   .   .   5

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4   .   P   .   .   P   .   .   .   4

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3  -B   .   S   .   .   S  -Q   .   3

|                                   |

2   P   B   .   P   .   P   P   P   2

|                                   |

1   .  -B   R   Q   .   B   .   R   1

|                                   |

+---a---b---c---d---e---f---g---h---+
Proofgame in 19.0 moves

R318 - Marco Bonavoglia, René J. Millour
B4b2/2pppp2/8/8/PP6/6P1/R3kPP1/6K1 (8+6)
+---a---b---c---d---e---f---g---h---+

|                                   |

8   B   .   .   .   .  -B   .   .   8

|                                   |

7   .   .  -P  -P  -P  -P   .   .   7

|                                   |

6   .   .   .   .   .   .   .   .   6

|                                   |

5   .   .   .   .   .   .   .   .   5

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4   P   P   .   .   .   .   .   .   4

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3   .   .   .   .   .   .   P   .   3

|                                   |

2   R   .   .   .  -K   P   P   .   2

|                                   |

1   .   .   .   .   .   .   K   .   1

|                                   |

+---a---b---c---d---e---f---g---h---+
Monochrome chess
a) First move?
b) Which pieces have necessarily made a switchback, and where?
c) What are the white captures?

R319 - Paul Raican
6B1/8/8/8/6kp/7p/8/4K3 (2+3)
+---a---b---c---d---e---f---g---h---+

|                                   |

8   .   .   .   .   .   .   B   .   8

|                                   |

7   .   .   .   .   .   .   .   .   7

|                                   |

6   .   .   .   .   .   .   .   .   6

|                                   |

5   .   .   .   .   .   .   .   .   5

|                                   |

4   .   .   .   .   .   .  -K  -P   4

|                                   |

3   .   .   .   .   .   .   .  -P   3

|                                   |

2   .   .   .   .   .   .   .   .   2

|                                   |

1   .   .   .   .   K   .   .   .   1

|                                   |

+---a---b---c---d---e---f---g---h---+
-7 & #1, Proca retractor, Anti-Circe