[Retros] Bishop round trip

[CAILLAUDM at aol.com]

Hello Pascal,

At the times where we had intensive email exchange with Gianni (Donati) and 
Mark (Kirtley) about circuits (=round trip) in SPGs, such lack of moves 
motivation was produced for each kind of piece :

King :
M.Caillaud, Phénix 2000, "La force centrifuge"
1n2n3/1pp1r1p1/Pp1p1p2/2b2rk1/1P5p/5P2/qP1PP1PP/2BQKBNR
SPG 19.5

Queen :
G.Donati, Probleemblad 1999
2bqkbnr/1pBp1ppp/2pR2N1/p7/4B1K1/6P1/PPP2PP1/R2Q2N1
SPG14.0
only example with CONTINUOUS circuit

Rook :
M.Caillaud, 2nd Pr., Probleemblad 1998
r1b1b3/p3pp1p/3q1p1n/2p5/Pk6/1P2P2P/2P1PPBP/R2Q1RK1
SPG 22.5

Bishop :
M.Caillaud, Thema Danicum 2002
R2qkbnr/2pp1pQp/pp3pp1/8/6K1/1PPP1P2/1P2N1PP/1N6
SPG 17.0

Best,
 Michel



> Hello,

> 

> most of you know about the following problem by Michel Caillaud :

> 

> +---+---+---+---+---+---+---+---+

> |*R | . |   | . |   | . |   | . |

> +---+---+---+---+---+---+---+---+

> |*P |   |*P |*P |*N |*P |*P |*P |

> +---+---+---+---+---+---+---+---+

> |*B | . |*P | . |   | . |   | . |

> +---+---+---+---+---+---+---+---+

> | . |   | . |   | . |   |*K |   |

> +---+---+---+---+---+---+---+---+

> |   | . |   |*N |   | . |   | . |

> +---+---+---+---+---+---+---+---+

> | . |   | . | P |*R | P |*B |   |

> +---+---+---+---+---+---+---+---+

> | P | P | P | B | Q | P | P | P |

> +---+---+---+---+---+---+---+---+

> | . |   | K | R | . |   | N | R |

> +---+---+---+---+---+---+---+---+

> r7/p1ppnppp/b1p5/6k1/3n4/3PrPb1/PPPBQPPP/2KR2NR

> 15.5 moves    (14 + 14)

> 

> 1.Nc3 Nc6 2.Nd5 Nd4 3.Nxe7 Kxe7 4.Nh3 Kf6 5.Nf4 Kg5 6.Nd5 Qf6 7.Nc3

> Qf3 8.exf3 Bd6 9.Bb5 Bg3 10.Bc6 bxc6 11.Ne2 Ba6 12.Ng1 Re8+ 13.Qe2 Re3

> 14.d3 Ne7 15.Bd2 Ra8 16.OOO

> 

> 

> The white Knight g1 makes a round trip so that White has moves to

> play.  (Unto Heinonen has published a longer are and more complicated

> problem with the same idea).

> 

> 

> Has anybody composed a SPG on the same idea with a Bishop ?

> 

> 

> The reason for the round trip must be the lack of other moves to play,

> no the need to loose (or gain) a tempo.

> 

> Best,

> Pascal

> 

> 


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