No.1763
Neal Turner
(Finland)
Original Fairy problems
JF-2023:
01.01.2023 - 31.12.2023
☝ Definitions
+/- Russian translation
| pieces | 'Grasshopper(G)', 'Nightrider(N)', 'Royal piece' | фигуры |
| 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. | Ходит по линиям ферзя, только перешагивая через другую фигуру любого цвета, на поле, следующее сразу за этой фигурой. Взятие может быть только на поле прибытия, фигура-препятствие остается незатронутой. |
| Nightrider(N): | (1,2) Rider. Operates along straight lines with squares lying a Knight's move away from each other. | Всадник. Линейная фигура (1,2). Играет по прямым линиям с полями, находящимися на расстоянии хода коня друг от друга. |
| Royal piece: | Piece that executes a function of the King on the board. | Фигура, которая выполняет на доске функцию короля. |
| conditions | 'SAT' | условия |
| SAT: | A King is under check if it can move to at least one square not controlled by the opposite side. | Король находится под шахом в случае, если он может пойти хотя бы на одно поле, не контролируемое стороной противника. |
No. 1763 Neal Turner
Finland
original - 30.09.2023
Black Royal Gb4
White Royal Gd1
White Nd3 Nd8
Black Nh2 Nh3
s==9 b) rGd1->a8 3+3
SAT
Royal Grasshopper b4, d1
Nightrider d3, d8, h2, h3
SAT
Royal Grasshopper b4, d1
Nightrider d3, d8, h2, h3
Solution: (click to show/hide)
a) 1.Nd8-b7+ {display-departure-rank} Nh3-b6 2.Nd3-h1+ Nh2-b5 3.Nh1-e7+ rGb4-f8 4.Ne7-c8+ rGf8-b8 {
} 5.Nc8-d6+ {display-departure-file} Nb5-c7 6.Nd6-e8+ rGb8-f8 7.Nb7-d8+ Nb6-d7 8.Nd8-b4+ Nc7-a3 {
} 9.Nb4-f2+ Na3-e1 {==}
b) wrGd1-->a8
1.Nd3-c5+ rGb4-d6 2.Nd8-c6+ Nh3-b6 3.Nc5-d3+ rGd6-d2 4.Nc6-e5+ {display-departure-file} Nh2-d4 {
} 5.Nd3-f2+ Nd4-f3 6.Ne5-c6+ rGd2-g2 7.Nc6-b4+ {display-departure-file} rGg2-e2 8.Nb4-d3+ {display-departure-file} Nb6-c4 {
} 9.Nd3-b2+ Nc4-a3 {==}
(C+ by Popeye 4.87)
What makes these sequences special is that they don't involve the usual captures, the final positions featuring pairs of mutual pins. Playing through the solutions we marvel at the agility of the nightriders, while the wrG also plays its part controlling the play, even while remaining stationary. In a) we're surprised by 2.Nd3-h1+! - the only square from which to reach e7 - but why don't we start with: 1.Nd3-b7+ Nh3-b6 2.Nd8-c6+ Nh2-b5 3.Nc6-e7+? In b) we get 4.Nc6-e5+ Nh2-d4 and two moves later the wN returns to c6, but why not 4.Nc6-e7+?
On several places, the moves as written are dualistic (e.g. first move of first solution should read ‘N8b7’).
Corrected the 1st move to N8b7. I can give departure rank or file for the moves where needed. Will check tonight, or to make it faster if anybody would give me the moves which should be shown with the rank/file, please?
1st solution:
5. Ncd6+
2nd solution:
4. Nce5
7. Ncb4
8. Nbd3
Thanks a lot! All done!