[Retros] Die Schwalbe Heft 222, december 2006

[Joost de Heer]

13232 - Dmitri Baibikov
s1S1k2K/8/8/8/8/8/8/8 (2+2)
+---a---b---c---d---e---f---g---h---+

|                                   |

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

|                                   |

7   .   .   .   .   .   .   .   .   7

|                                   |

6   .   .   .   .   .   .   .   .   6

|                                   |

5   .   .   .   .   .   .   .   .   5

|                                   |

4   .   .   .   .   .   .   .   .   4

|                                   |

3   .   .   .   .   .   .   .   .   3

|                                   |

2   .   .   .   .   .   .   .   .   2

|                                   |

1   .   .   .   .   .   .   .   .   1

|                                   |

+---a---b---c---d---e---f---g---h---+
Add 2 wRR, wB, wS and 8 bP for an illegal cluster

13233 - Emiliano F. Ruth
(Correction of 13078)
1rb5/4B3/2k4p/4R2p/2K4p/1p5p/1P5p/4R3 (5+9)
+---a---b---c---d---e---f---g---h---+

|                                   |

8   .  -R  -B   .   .   .   .   .   8

|                                   |

7   .   .   .   .   B   .   .   .   7

|                                   |

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

|                                   |

5   .   .   .   .   R   .   .  -P   5

|                                   |

4   .   .   K   .   .   .   .  -P   4

|                                   |

3   .  -P   .   .   .   .   .  -P   3

|                                   |

2   .   P   .   .   .   .   .  -P   2

|                                   |

1   .   .   .   .   R   .   .   .   1

|                                   |

+---a---b---c---d---e---f---g---h---+
-3 & #1 (Proca retractor)

13234 - G\"unther Weeth
2s2s2/4p3/1pp5/8/7k/8/8/4K3 (1+6)
+---a---b---c---d---e---f---g---h---+

|                                   |

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

|                                   |

7   .   .   .   .  -P   .   .   .   7

|                                   |

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

|                                   |

5   .   .   .   .   .   .   .   .   5

|                                   |

4   .   .   .   .   .   .   .  -K   4

|                                   |

3   .   .   .   .   .   .   .   .   3

|                                   |

2   .   .   .   .   .   .   .   .   2

|                                   |

1   .   .   .   .   K   .   .   .   1

|                                   |

+---a---b---c---d---e---f---g---h---+
-6 & #1 (Proca retractor, Anticirce)

13235 - Wolfgang Dittmann
(Correction of 13079)
1k1s4/1Pb2P2/1P1p1S1p/B6b/5P1P/4P1Ks/p3PP1r/5B2 (12+9)
+---a---b---c---d---e---f---g---h---+

|                                   |

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

|                                   |

7   .   P  -B   .   .   P   .   .   7

|                                   |

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

|                                   |

5   B   .   .   .   .   .   .  -B   5

|                                   |

4   .   .   .   .   .   P   .   P   4

|                                   |

3   .   .   .   .   P   .   K  -S   3

|                                   |

2  -P   .   .   .   P   P   .  -R   2

|                                   |

1   .   .   .   .   .   B   .   .   1

|                                   |

+---a---b---c---d---e---f---g---h---+
-15 & #1 (Proca retractor, Anticirce)

13236 - Michael Grushko
8/8/8/4=b3/4K3/7k/8/8 (1+1+1)
+---a---b---c---d---e---f---g---h---+

|                                   |

8   .   .   .   .   .   .   .   .   8

|                                   |

7   .   .   .   .   .   .   .   .   7

|                                   |

6   .   .   .   .   .   .   .   .   6

|                                   |

5   .   .   .   .  =B   .   .   .   5

|                                   |

4   .   .   .   .   K   .   .   .   4

|                                   |

3   .   .   .   .   .   .   .  -K   3

|                                   |

2   .   .   .   .   .   .   .   .   2

|                                   |

1   .   .   .   .   .   .   .   .   1

|                                   |

+---a---b---c---d---e---f---g---h---+
White and black retract 1 move for h=1
Circe Parrain, Checkless chess
Neutral bishop e5

13237 - Gerald Irsigler

How many squares can you mark at most on a chess board so that every 
possible position with pieces on those squares (including wK and bK) is 
legal?

(e.g.: mark e1 g2 h1 isn't valid, since wKe1, wBh1 wKg2 isn't legal. e1 
g3 h1
is valid though)