No.1717
Eric Huber
(Romania)
Original Fairy problems
JF-2022-I:
01.01.2022 - 30.06.2022
| conditions | 'Anticipés','Anti-Circe' | условия |
| Anti-Circe: | 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 allowed in Anti-Circe Calvet and not allowed in Anti-Circe Cheylan. Game array squares are determined as in Circe: R, B & S go to the square of the same colour as the capture; Ps stay on the file of capture; fairy pieces go to the promotion square of the file of capture. | После взятия берущая фигура (включая королей) должна быть немедленно поставлена на поле, занимаемое ею в расстановке фигур перед началом партии (обязательно свободное, иначе взятие нелегально). Взятия на полях возрождения разрешены в Anti-Circe Calvet и не разрешены в Anti-Circe Cheylan. Расстановка фигур определяется как в Circe: ладьи, слоны и кони возвращаются на поля того цвета, на которых были взятия. Взявшая пешка возвращается на линию, на которой она взяла. Сказочные фигуры – на поля превращений на линии взятия. |
| Anticipés: | A King is in check when the other side can capture him on the next move (as per chess rules) and also when the other side can capture him playing two legal moves in a row. (by Eric Huber). A king is also in check if he can be put in check.” but it does not sound very explicit. (the WinChloe definition) |
No. 1717 Eric Huber
Romania
original - 20.06.2022
Anticipés
Anti-Circe (Cheylan)
Solution: (click to show/hide)
(C+ by Winchloe 3.53)
Mates forced by zugzwang, specific pin.
Exchange of functions of white Pawns h7 and d7.
Black King switchback in b)
Explanations about the solutions:
a) 1...c1=R+ is check in Anticipés because the black Rook can attack the wK via c7. 2.h8=R parries the check according to Anticirce rules, because it occupies the bR rebirth square. At the same time, 2.h8=R gives check via h1.
2...Ra1 occupies the wR rebirth square and at the same time gives check (via a8). 3.Rh1 pins the bR to a1 and thus parries the check.
In the final position, the bK’s flight to d2 is guarded by wPd7 (via promotion to Q/R on d8). The only possible move is 3...Kf2#
b) 2...c1=Q occupies the wB rebirth square and at the same time gives check (via c7, b2 or b1). 3.Bf2 pins the bQ to c1 and thus parries the check.
In the final position, the bK’s flights to e8, h1 and h2 are guarded by wPh7 (via promotion to Q/R on h8). The only possible move is 3...Kf1#
Very interesting. But it is a little confusing. I thought Ra1 was pinned by Rh1 and hence no mate (after Kf2 in the first solution)
What is the difference between the pin after 3.Rh1 and the apparently similar pin 4.Rh1-f1 (after 3…Kf2+)?
deleted
4. Rf1? is not legal because of Rxf1[a8]-c8
Oh indeed, thanks Joost. So, that’s why the pin by 3.Rh8-e8 isn’t good, since a pin by 4.Re2/f8 would legally parry the check by 3…Kf2.
Still, the rules should mention explicitly the different effects of the standard ‘one-move’ check (as per chess rules) and of the ‘two-legal-moves-in-a-row’ check.
…By heart choice (as of 03/28/2024):
1689 (24); 1688, 1700, 1712 (16); 1693, 1702 (15); 1704.1(14) etc.