{}
a) {}
1.Qd4-d8 + Kf8-e7 2.Ba8-b7 Ke7-d6 #{}
b) bKc6-->b7 {Kc6-->b7}
1.Qd4-d5 Kf8-e8 2.Kb7-c8 Ke8-d7 #
{In each twin, the Queen neutralizes the "pinning piece", releasing a King, white or black.}
2 - #2 Transmuted Kings with Grasshoppers et Nightriders
Shlomo SEIDER& Theodor TAUBERRozmaitosci szachowe 1997
white WGc6a4 Kc5 WNh6a6 Ph7 Sc3 Rh2f6
black Bc4 BGc8 Ke8 BNe1 Qc2 Pd5d3d2g3g6 Rc7
: when a King is in check, it catches the moving way of the piece that puts him in check
when it is not in check, its march is normal.
: a piece that needs a sautoir for any movement.
The path must be clear between the starting square and the sautoir and the square behind the sautoir must be free or occupied by an opposing piece.
Nightrider : Knight able to make several successive jumps in the same direction
white WVd8 Bb8 WPf8 Kg7 WLd7 Qe3 Pa7f7h7h6c4 Sc7 Re7
black Pc6 Kc8 BLe8 BPg8 BVh8
s#4 Sentinels(13+5)
🨵f8, 🨻g8: Pao🨶d8, 🨼h8: Vao🨴d7, 🨺e8: Leo
: A piece (not a pawn) that plays "defecates" a pawn on the starting square of the move.
When nothing is specified, the number of pieces present must not exceed 8 per side.
: pieces moving normally, except for the capture where they need a sautoir.
the path must be clear between the starting square and the sautoir, as well as between the sautoir and the capture square.
Leo has the Queen's march, the Pao of the rook and the Vao of the bishop
{ J.A.}
1...c6-c5 {}
2.Qe3-e5[+wPe3] zugzwang.
2...BVh8*e5 {}
3.WLd7-b5[+wPd7] +
3...Kc8-b7 {}
4.WLb5-b1[+wPb5] + {there is now 8 white pawns on chessboard}
4...BVe5-b2[+bPe5] #{no 5 Kh8? because there is no sentinel left and so we get Vb2xh8.
real play}
1.a7-a8=R ! zugzwang.
1...c6-c5 {}
2.Qe3-g5[+wPe3] zugzwang.
2...BPg8*g5 {}
3.WLd7-d5[+wPd7] +
3...Kc8-b7 {}
4.WLd5-h1[+wPd5] +{ony 7 white pawns !}
4...BPg5-g2[+bPg5] #
{no 5 Kf6? because of sentinel g7.}
5 - #2 Mars Circe
Stephen EMMERSON& Michel CAILLAUDT.T. Paisley - 1996 - prize
white Bg1 Ke1 Qe4 Pg3g7d2 Sa5 Rg2
black Qd1 Pf4g4 Kf3 Re2
#2 Mars Circe(8+5)
: to capture another one, a piece virtually passes through its native square
{ }
1.g7-g8=Q ? zugzwang.
but
1...Re2*a5 ! {}
1.Rg2-f2 + ? {check by Pawn g3}
but
1...Kf3-g2 ! {}
1.Rg2-h2 + ? {check by Pawn g3}
but
1...Kf3-g2 ! {}
1.Bg1-a7 + ? {check by Knight a5}
but
1...Qd1*a5 ! {}
1.Bg1-b6 + ? {check by Knight a5}
but
1...Re2*a5 ! {}
1.Ke1*d1 ? threat:
2.Bg1-a7 #
but
1...Re2-e1 ! {on Bg1-a7 +, we have Ke3-f2, the occupation of the e1 square preventing Kd1xf2}
1.g7-g8=B ! threat:
2.Rg2-f2 # {by the g3-pawn, the g2-square now being controlled by the Bg8.
It should be noted that 2.Rg2-h2 is not a threat because of Re2-g2
the following mates are made by Na5}
1...Qd1*d2
2.Bg1*d2 # {Re2 is now pinned, Qe4 which can go through d1}
1...Qd1*g8
2.Bg1-b6 # {same remark}
1...Re2*g8
2.Bg1-a7 # {prevents Rg8-a8xa5}
1...Re2-f2
2.Bg1-h2 # {no Rf2xa5, as the Rook must now pass through h8 to make a capture !}
6 - h#4 Back-to-Back
Kalyanasundram SEETHARAMAN2015
white Ph2 Kb2
black Bg8 Kh8 Qh7 Pe5 Sd6 Ra1d8
6 - h#4 Back-to-back(2+7)
Back-to-Back (fesse to fesse in french) :
When pieces of opposite colors stand back-to-back with each other on the same file, they exchange their roles.
P on the first rank cannot move.
Any piece can make an en passant capture when it is given a power to move as P by BTB.
{}
1.Qh7-b1+ {Qb1 have now moving way of Kb2 and Kb2 that of Qb1}
Kb2*e5 {no more Back-to-Back, the pieces return to their normal life}
2.Qb1-h7 Ke5-f6 {} 3.Ra1-h1 {catches the march of ph2 and vice versa ph2 catches the march of Rh1}
h2-b2 {no more Back-to-Back} 4.Qh7-b1 {gives pb2 the march of Qb1 which catches that of pb2}
Kf6-g6#
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