Click in the right part of the chessboard to move forward, left to move backward...
or directly on the move in the solution
1 - hs=7 4 solutions with sparrow and eagles
Kotesovec, V. 2019
hs=7 4sol.(2+4) 🨢f1: Sparrow 🨺g6, f3, c5: Eagle
kind of Grashopper which, instead of arriving just after the sautoir, arises by going back 45 °
kind of Grashopper too but with a 90 ° angle on the side of the sautoir
1.🨢d2(f1-d3-d2 = 45° ; d2-d3-c4 = 135°)🨺e2+ 2.♔c2♔d5 3.♔c1🨺b1 4.♔b2♔c4 5.♔a1♔b3 6.🨢d1(d1-e2-f2 = 135°)🨺b4 7.🨢b2+
7...♔a4or 7...♔c4pat.
Black has no oher move, EAb1-a2 ou EAb1-c2 ou EAb4-a3 ou EAb4-c3 ou Ka3 ou Kc3 ou Kc2 would be a self-check.
for example, with Eagle c2, Sparrow b2 attacks King b3 since d2-c2-b3 = 135 degrees.
After 7...Ka4 or 7...Kc4 it's really pat : Sparrow is pinned by the Eagle b4, Ka2 is doubly prohibited, Kxb1 is prohibited by the Eagle e2.
1.♔c4♔d6 2.♔b5🨺b6 3.♔a6🨺d7 4.♔b7🨺a6+(via b6) 5.♔a8♔c7 6.🨢a5(imagine Sparrow going left from a7, then make an angle of 135 degrees with a6 and a5) 🨺b8+(""discover check" by EAb6) 7.🨢b7+
(access in b7 because a9-a8-b7 = 135 degrees, then fails because b5-b6-c7 = 135 degrees like also b9-b8-c7!)
7...♔d8ou 7...♔d6pat
1.♔e4♔e7 2.♔f5🨺g4+(check by EAf3) 3.♔g6🨺d8 4.♔h7♔f7 5.♔h8🨺e7 6.🨢g6🨺h7 7.🨢g7(e8-f7-g7 = 135 degrees)
7...♔e8or 7...♔e6pat
(EAh7-g8 or EAh7-g6 or EAe7-f8 or EAe7-f6 or Kf8 or Kf6 or Kg6 would be a self-check, this last move because g6-h7-i7 = 135 degrees)
marine units moves are standard but takes as a Locust.
Triton is a marine Rook (Trnh3 prevent ...Kxd3 because Trnxd3-c3 and ...Kf3 with Trnxf3-e3).
Nereide is a marine Bishop (Neng1 prevent ...Kxd4 because Nénxd4-c5 and ...Kf2 with Nénxf2-e3).
neutral marine Knight f1 prevent Kd2 with Cmnxd2-b3.
1.♗xd5self-pin of the Bishop : if he play, Nmnxe3-d5.dxe5+: check with the threat Néng1xe3-d4. 2.♘d4exf6#
Knight d4 is pinned by neutral Nereide g1, Bishop d5 by neutral marine Knight f1.}
1.♘xd4dxe4+ : threat Trnh3xe3-d3 2.♘d3exf5#: Knight d3 is pinned by neutral Triton h3
Of course, the two solutions "lack unity", says Mr Balasubramanian, but what fun !
6 - h#2 symetry point
Argirakopoulos, T. 2019
h#2 symetry point(2+6) b) ♟b2-->c2
symatry pointtwo units placed symmetrically with respect to the center of the chessboard
(common point to squares d4, e4, e5 & d5) exchange the way they move.
Pe6 move as a Knight, Nd3 as a pawn.
1.🨵e3!
1...🨻a1or 1...🨻b1or 1...🨻c1or 1...🨻d1or 1...🨻f1 2.🨵c3# 1...🨻b4or 1...🨻h4or 1...🨻g4or 1...🨻f4or 1...🨻e4or 1...🨻d4 2.🨵e2#
: "covering" mate by Nao g1, the Pao no longer being able to intercept in c3 1...🨼h4or 1...🨼g3 2.🨵e4#:} 2...Vd4 not possible and🨻c3activate Nao g1
Add a comment