[Retros] The Problemist, Januari 2007

[Joost de Heer]

R381 - Eyjolfur Eyjolfsson
rsbqkbBr/pppp2p1/4pp1p/8/8/8/PPPPPKP1/RSBQ1BS1 (14+15)
+---a---b---c---d---e---f---g---h---+

|                                   |

8  -R  -S  -B  -Q  -K  -B   B  -R   8

|                                   |

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

|                                   |

6   .   .   .   .  -P  -P   .  -P   6

|                                   |

5   .   .   .   .   .   .   .   .   5

|                                   |

4   .   .   .   .   .   .   .   .   4

|                                   |

3   .   .   .   .   .   .   .   .   3

|                                   |

2   P   P   P   P   P   K   P   .   2

|                                   |

1   R   S   B   Q   .   B   S   .   1

|                                   |

+---a---b---c---d---e---f---g---h---+
SPG 11.0

R382 - Cedric Lytton, Alain Brobecker
1s2r1s1/1B4B1/8/8/r7/2P1S1RP/2Q1RK2/8 (9+4)
+---a---b---c---d---e---f---g---h---+

|                                   |

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

|                                   |

7   .   B   .   .   .   .   B   .   7

|                                   |

6   .   .   .   .   .   .   .   .   6

|                                   |

5   .   .   .   .   .   .   .   .   5

|                                   |

4  -R   .   .   .   .   .   .   .   4

|                                   |

3   .   .   P   .   S   .   R   P   3

|                                   |

2   .   .   Q   .   R   K   .   .   2

|                                   |

1   .   .   .   .   .   .   .   .   1

|                                   |

+---a---b---c---d---e---f---g---h---+
add the missing units for a legal
position in which no unit attacks an
enemy unit

F2531R - Peter Fayers
rsbq1ksr/p1pp1ppp/4p3/8/8/8/PPPPPPPP/RSBQKB1R (15+14)
+---a---b---c---d---e---f---g---h---+

|                                   |

8  -R  -S  -B  -Q   .  -K  -S  -R   8

|                                   |

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

|                                   |

6   .   .   .   .  -P   .   .   .   6

|                                   |

5   .   .   .   .   .   .   .   .   5

|                                   |

4   .   .   .   .   .   .   .   .   4

|                                   |

3   .   .   .   .   .   .   .   .   3

|                                   |

2   P   P   P   P   P   P   P   P   2

|                                   |

1   R   S   B   Q   K   B   .   R   1

|                                   |

+---a---b---c---d---e---f---g---h---+
SPG 4.0, Vertical Mobius Strip

F2532R - Rene J. Millour
2Q1q1rR/P2sB2p/1b1K4/5p2/4pp2/2P4k/8/r4b2 (6+11)
+---a---b---c---d---e---f---g---h---+

|                                   |

8   .   .   Q   .  -Q   .  -R   R   8

|                                   |

7   P   .   .  -S   B   .   .  -P   7

|                                   |

6   .  -B   .   K   .   .   .   .   6

|                                   |

5   .   .   .   .   .  -P   .   .   5

|                                   |

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

|                                   |

3   .   .   P   .   .   .   .  -K   3

|                                   |

2   .   .   .   .   .   .   .   .   2

|                                   |

1  -R   .   .   .   .  -B   .   .   1

|                                   |

+---a---b---c---d---e---f---g---h---+
-2 & #1 (help-retractor, Mars circe)
(b) bPe4->g5
(c) & wKd6->c5
(d) & wQc8->f6

Vertical mobius strip:
The vertical edges of the board are imagined to be fixed to each
other as in a Vertical Cylinder, but after having been twisted so
that the 1-8 ranks on one side are adjacent to the 8-1 ranks on
the other. Possible movements in the diagram are bRa8xRh1,
bBc8-b7-a6-h4-g5-f6-e7, bSg8xa2.

The twins in F2532R are successive, the change for (c) is made
from the position in (b).