Fairy chess composition

# No.934,935 (SL,SL&PR)

 No.934, 935Sébastien Luce (France) No.935.1Sébastien Luce (France),Paul Rãican (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.934, 935 by Sébastien Luce: No.934 – A minimal echo with a duo of Grasshoppers; No.935 – A four corners theme. (Author)

No.935.1 by Sébastien Luce & Paul Rãican – A new version to No.935: “All white units contributes to checkmate. Four corners theme (in No.935) is replaced with come-and-go path: a2-a3-f8-h8-f8-a3-a2.” (PR)

Definitions:

Symmetry Circe: As Circe except that the rebirth square for the captured unit is that which lies at an equal distance (in a straight line) beyond the midpoint of the board. Thus a capture on c4 produces a rebirth on f5, a capture on g1 produces a rebirth on b8, and so on. Strictly speaking there are of course other types of symmetry: this one is rotational. (Or from Fairings No.42: Captured units are reborn on the square which lies at an equal distance (in a straight line) beyond the midpoint of the board. If the rebirth square is occupied the capture is normal.)

Anti-Super Circe: On making a capture, any capturing unit (including the King) is reborn on any free field on the board without causing a self-check or a selfmate. Thus every move has two active parts: capturing component (capture of enemy piece) and rebirth (replacing) component. If the first or second component is not possible, the move is illegal. The captured unit disappears as in normal chess. Pawns (white, black, neutrals, half-neutrals) can be reborn on the first or eight row. When reborn on the first row (for Black) or the 8th row (for White), the promotion (as the second move’s part) is obligatory and the promoted unit is chosen by the capturing side. White reborn Pawns on 1st rank (black on 8th) have no power. Normal, orthodox rules for castling and en passant are in force with the following additional elements: castling is permitted with the reborn King or (plus) Rook, and en passant is possible in combination with the Pawn’s promotion as second component of the same capturing move.

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.

PWC: When a capture is made, the captured unit (except a King) is replaced on the square the capturing unit just leaves. A Pawn is immovable on its 1st rank.

Einstein chess: All units (Ks excluded) change their type when they move, according to a precise pattern. For non-capture moves: Q>R, R>B, B>S, S>P, P remains P. For capture-moves: R>Q, B>R, S>B, P>S, Qremains Q.

Grasshopper(G): Moves along Q-lines over another unit of either color to the square immediately beyond that unit. A capture may be made on arrival, but the hurdle is not affected.

 No.934 Sébastien LuceFranceoriginal – 16.10.2015 Solutions: (click to show/hide) White kf3 Black kf1 ge2 Neutral gg4 h#3.5           2 solutions       (1+2+1)Circe SymmetryAnti-Super CirceGrasshopper e2, g4 1...nGg4*e2[nGe2->g2][+bGd7] 2.Kf1*g2[bKg2->a1][+nGb7] Kf3-g2 { } 3.nGb7-h1 Kg2*h1[wKh1->g7][+nGa8] 4.Gd7-h7 Kg7*h7[wKh7->c1][+bGa2] # { } 1...Kf3*g4[wKg4->b1][+nGb5] + 2.Kf1-g2 nGb5-f1 3.Ge2-h2 nGf1-a1 { } 4.Kg2-h1 Kb1*a1[wKa1->f1][+nGh8] # { (C+ by WinChloe 3.32 & Popeye 4.73)} The final mating picture is previsible, but the way to obtain it difficult to see. Some explanations are necessary: In the first variation, the neutral Grasshopper captures the black one to rebirth to the precise g2 square (Anti-Super Circe effect). Then black King can recapture on g2 with two effects: the King rebirths to a1 corner and the Grasshopper goes to b7 (symetrical Circe effect). Then white King goes to g2 as an hurdle for neutral Grasshopper which moves in h1 allowing a new capture this time by white King which rebirths to the precise square g7 and neutral Grasshopper rebirths to the critical square a8. After 4.Sh7, the last capture by white King achieves the final typical mating picture. The play is simpler in second variation: this time white King captures neutral Grasshopper with two effects : rebirth of the neutral in b5 (symetrical Circe effect) and white King rebirths to the precise square b1 (Anti-Super Circe effect). Some moves without captures follow, on the third, the neutral Grasshopper uses white King as an hurdle to go in a1, preparing the last capture with the echo mate. My "dream" was to realize the echo in the four corners ! I didn't succed and I don't know if it is possible with this material and this combination of conditions or another. But it is surely a good challenge for the composers! (Author) No.935 Sébastien LuceFranceoriginal – 16.10.2015 Solutions: (click to show/hide) White kg6 pa3h1h8 Black ke8 ba8 pa7 ser-h#12                                    (4+3)PWCEinstein Chess 1.Ba8*h1=R[+wPa8] 2.Rh1-a1=B 3.Ba1*h8=R[+wPa1] 4.0-0=B { } 5.Bf8*a3=R[+wPf8] 6.Ra3*a1=Q[+wPa3] 7.Qa1*a3[+wPa1] 8.Qa3-e7=R { } 9.Re7-g7=B 10.Bg7*f8=R[+wPg7] 11.Rf8-f6=B 12.Bf6*a1=R[+wPf6] f6-f7 # { (C+ by WinChloe 3.32 & Popeye 4.73)} The first four moves by black Bishop a8 allows his transformation in black Rook in h8 achieving the four corners theme. Then castle is possible (Einstein effect) & the Rook transforms in Bishop. After many other captures of white pawns a1 & a3 will be necessary to get the good configuration in f6-g7 (PWC effect) allowing the mate by a pawn. (Author) No.935.1 Sébastien Luce &Paul RãicanFrance / Romaniaversion to No.935 – 31.10.2015 Solutions: (click to show/hide) White Kg6 Pa3 Pf8 Black Ke8 Ra2 Pb7 Pe2 ser-h#13                                    (3+4)PWCEinstein Chess 1.Ra2*a3=Q[+wPa2] 2.Qa3*f8[+wPa3] 3.Qf8-h8=R 4.0-0=B 5.Bf8*a3=R[+wPf8] { } 6.Ra3*a2=Q[+wPa3] 7.Qa2-a1=R 8.Ra1*a3=Q[+wPa1] 9.Qa3-e7=R 10.Re7-g7=B { } 11.Bg7*f8=R[+wPg7] 12.Rf8-f6=B 13.Bf6*a1=R[+wPf6] f6-f7 # { (C+ by WinChloe 3.32 & Popeye 4.73)} All white units contributes to checkmate. Four corners theme (in No.935) is replaced with come-and-go path: a2-a3-f8-h8-f8-a3-a2. (PR)

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Paul Rãican
October 18, 2015 16:45

In 935, wPa8 is useless in final position. So, I made a version:
w: Kg6 Pa3 Pf8
b: Ke8 Ra2 Pb7 Pe2
(3+4) ser-h#13 Einstein PWC C+(Popeye & WinChloe)
1.Ra2*a3=Q[+wPa2] 2.Qa3*f8[+wPa3] 3.Qf8-h8=R 4.0-0=B 5.Bf8*a3=R[+wPf8] 6.Ra3*a2=Q[+wPa3] 7.Qa2-a1=R 8.Ra1*a3=Q[+wPa1] 9.Qa3-e7=R 10.Re7-g7=B 11.Bg7*f8=R[+wPg7] 12.Rf8-f6=B 13.Bf6*a1=R[+wPf6] f6-f7 #
Here, all white units contributes to checkmate. Four corners theme is replaced with come-and-go path: a2-a3-f8-h8-f8-a3-a2.

Luce Sebastien
October 18, 2015 18:58

Dear Paul,
you pointed rightly a light weakness of my problem.
I wanted absolutely to realize the fours corners, but there are other examples in Winchloe database (without castling). Your version loses the theme but the solution is more “mysterious” and of course it is more economical.
If you like, and if Julia is agree, I would be glad to publish it as 935.1 S.Luce & P.Raican
Sebastien Luce

petko petkov
October 31, 2015 21:13

Is right Anti – Super-Circe but not Super Anti-Circe ( I am the inventor of this condition – first publication: Feenschach, 2003, Heft 151; than second publication in Strate Gems, №28, 2004, etc. ). I ask for correction.
By the by, false is also the definition of Anti-Super – Circe in FIDE-ALBUM 2007-2009 because there are not “rebirth-squares” in Anti-Super-Circe. This feature and many other features are well explained in my cited articles in 2003 and 2004.

Geoff Foster
June 28, 2018 06:30

In no.935 and 935.1, why is Black allowed to castle with a rook that was transformed from another type of piece? The rook has not been reborn so it is not a new piece. Popeye and WinChloe both allow this, but older versions of Popeye did not.

Joost
July 3, 2018 10:55