No.941 (SL&VC)

 No.941Sébastien Luce (France) No.941.1 Sébastien Luce (France)& Vlaicu Crişan (Romania) Original Problems, Julia’s Fairies – 2015 (II): July – December    →Previous ; →Next ; →List 2015(II) Please send your original fairy problems to: julia@juliasfairies.com

No.941 by Sébastien Luce – A combination of Circe Antipodes and Anti-Circe(JV)

No.941.1 by Sébastien Luce & Vlaicu Crişan – An improved version to No.941. (JV)

Definitions:

Circe Antipodes: When a piece is captured (King excluded, unless otherwise stated), it must be replaced on its rebirth square (at 4 columns and 4 ranks of the capture square) if it is empty; otherwise, the captured unit vanishes.

Anti-Circe (Cheylan): After a capture the capturing piece (Ks included) must immediately be removed to its game array square (necessarily vacant, else the capture is illegal). Captures on the rebirth square are not allowed. Game array squares are determined as in Circe.

Circe: Captured units (not Ks) reappear on their game-array squares, of the same colour in the case of pieces, on the file of capture in the case of pawns, and on the promotion square of the file of capture in the case of fairy pieces. If the rebirth square is occupied the capture is normal.

Fairy Bishop (BF): (WinChloe only) Moves like normal Bishop, reborns like fairy piece.

Royal piece: Piece that executes a function of the King on the board.

 No.941 Sébastien LuceFranceoriginal – 25.10.2015 Solutions: (click to show/hide) White Ka8 Pd5f5h2 Black Pf7f2 Black royal BFa1 h#3               2 solutions          (4+3)Circe AntipodesAnti-Circe (Cheylan)Royal Fairy Bishop a1 1.f2-f1=R f5-f6 2.Rf1*f6 [bRf6->h8][+wPb2] h2-h4 { } 3.Rh8*h4 [+bRh8][+wQd8] Qd8*h8 [wQh8->d1][+bRd4] # 1.f2-f1=B h2-h3 2.Bf1*h3 [bBh3->c8][+wPd7] d5*c8=Q [wQc8->d1][+bBg4] + { } 3.Bg4*f5 [bBf5->c8][+wPb1] b1-b2 # { (C+ by WinChloe 3.32)} In the first variation, the promotion in Rook allows after the capture of Pf6 its rebirth on h8 (Anticirce effect). The advance of Ph4 follows, the Rook recaptures and rebirths again on h8, and the Ph4 promotes in Queen on d8 (Circe Antipod effect). The Queen recaptures on h8 and rebirths to mate on d1 because the black Rook d4 cannot capture the white Queen as the rebirth square a8 is occupied by the white King (Anticirce effect) and also the royal fairy Bishop a1 cannot capture on b2 as the rebirth square is b1 with auto-check. In the second variation, the promotion in orthodox Bishop prepares the rebirth on c8 after the capture of Ph3 (Anticirce effect). This Pawn rebirths on d7 (Circe Antipod effect) and can capture the black Bishop c8, with promotion into Queen which rebirths on d1 with check (Anticirce effect). On the same time the black Bishop rebirths on g4 (Circe Antipod effect). This Bishop fends off the check capturing Pf5 which rebirths on b1 (Circe Antipod effect) and this pawn advances one step to mate the royal black Bishop! (Author) No.941.1 Sébastien Luce & Vlaicu CrişanFrance/Romaniaversion of No.941 – 26.10.2015 Solutions: (click to show/hide) White Ke7 Pf5d4a2h2 Black Ka1 Pf7f2 h#3               2 solutions          (5+3)Circe AntipodesAnti-Circe (Cheylan) 1.f2-f1=R f5-f6 2.Rf1*f6[bRf6->h8][+wPb2] h2-h4 { } 3.Rh8*h4[bRh4->h8][+wQd8] Qd8*h8[wQh8->d1] # 1.f2-f1=B h2-h3 2.Bf1*h3[bBh3->c8][+wPd7] d7*c8=Q[wQc8->d1][+bBg4] + { } 3.Bg4*f5[bBf5->c8][+wPb1] b1-b2 # { (C+ by WinChloe 3.32; C+ by Popeye 4.73 with condition "NormalPawn")} SL: These times, I worked a lot with royal pieces, so the original version was : White : Ta8 Pd5f5h2 Black : Pf7f2 & a fairy Bishop in a1. And I was very proud of my fairy Bishop, very mobile ! But after an exchange of mails, Vlaicu Crisan proposed very skilfully to avoid the presence of a fairy piece in a world of pawns ! Thank you Vlaicu, it is much better like this ! The solution remains unchanged but some additional explanation is necessary : White King now keeps control on e8, the favourite square e8 of rebirth for black King in Anticirce. So at the end the capture of white pawn a2 is impossible for the King. The truth is in the simplicity! VC: Of course, it was just a lucky discovery. All I have done was to ask myself an obvious question: "Is that royal piece really needed?" After studying the position, I realized the position of bK in the corner would prevent any mate with wRh1 thanks to AntiCirce Cheylan. Then I tried to find a guard for e8 and initially wBf7 seemed the most appropriate choice. When I realized the charm of the position is somehow lost, I decided to use some pawns instead. And voilà, ça y est! But I still think Sébastien deserves full credits for his wonderful idea...