Original Problems, Julia’s Fairies – 2014 (I): January – April
Please send your original fairy problems to: email@example.com
No.521 by Chris Feather – An exotic four-men with neutral AUW and three fairy conditions
Anti-Kings: A king is in check if he is not attacked. Mate occurs when a king is not attacked and his side has no move which exposes him to attack. (Of course kings may not be captured.)
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.
Mars Circe: Non-capturing moves are normal, but to capture a unit is transported to its Circe rebirth square, which must be vacant, before proceeding to move towards the captured unit, all as one move.
An additional explanation by CJF: “Mars Circe works as follows: Captures occur only as if the capturing piece is starting from its game array square (determined as usual in Circe). Thus for example a black king can capture only by arriving on d8/d7/e7/f7/f8, as if from e8. In Mars Circe, captured pieces usually disappear as in normal chess, but in combination with PWC they reappear on the square just vacated by the capturing piece (NOT its game array square, unless of course the capturer actually plays from that square).“
No.521 Chris Feather
h#2 2 solutions (1+1+2)
Hints: (click to show/hide)
In the initial position the nPb2 ensures that both Ks are safely attacked.
Solutions: (click to show/hide)
I. 1.nPg1=nQ nPb3 2.nQd1 nQxb3[nPd1=nB]# Once the nPb3 is captured, its attack on the wK is removed, so the attack must be restored by creating a nB, which attacks the wK from f1; 2…nQxb3[nPd1=nS]??, for example, would be illegal self-check. In the mating position, no nQ check to the bK is possible, because d1 is occupied by the nB. The bK cannot reach a squaere attacked by the nB from f1.
II. 1.nPg1=nR nRa1 2.nPb1=nS+ nRxb1[nSa1]# The nR goes to a1 (attacking the bK) so as to allow the nS-promotion without self-check, since the nS attacks only from g8. Black’s second move is check because the wK is no longer attacked by the nP. The final move answers the check by making a new attack on the wK (by the nS from b8) and places the nR on a white square. The bK cannot reach any of the squares attacked by this R (from h1) nor by the nS (from b8) so he is mated. (Author)
(C+ by Popeye 4.65)