py_20211109

2 - 2# with locusts

Locust A kind of Grasshopper that swallows the sautoir, which must necessarily be an opposing unit.
The square just behind must be vacant

Petrovic, N.
1976

white Pc7c5b5b3f2f6g5 Kc1 Bd6 Lc8h7a6g3 black Pa7a5c3f7h5g4h2 Ke4 Bd3g1 Ld5d4

#2(13+12)
c8, h7, a6, g3, d5, d4: Locustes

Solution

{

Essai :} 1.Lh7*f7-e7 + ? but 1...Ke4-f5 ! {

} 1.Lc8*g4-h3 ! {(menace} 2.Lh7*f7-e7 # {)
} 1...Ld4*f6-g7 2.La6*a5-a4 # {(Locust g7 cannot return to d4 and Bd3 is "pinned" by Locust h7)
} 1...Ld4*c5-b6 2.Lh7*h5-h4 # {But not} 2.La6*a5-a4 + ? Lb6*b5-b4 ! {
} 1...Ld5*b3-a2 2.La6*a7-a8 # {But not} 2.Lh3*h2-h1 + ? La2*f2-g2 ! {
} 1...Ld5*d6-d7 2.Lh3*h2-h1 # {But not} 2.La6*a7-a8 + ? Ld7*c7-b7 ! {
Double anti-dual.
} 1...Bg1*f2 2.Lg3*f2-e1 # {(as} 2...Bd3-e2 {is illegal because of } 3.Lh7*e4-d3

3 - 2# with chinese pieces

Chinese pieces Chinese pieces move normally except to make a capture
. where they need a sautoir

Loustau, JM.
2018

white VAg1f3 LEb1 NAe1a4f8 Ka8 Qf2 Pb3 Sg3 Rh7 Ba6c7 black Pa7f6 Kd5 LEb6 PAe5f1h4

#2(13+7)
e5, f1, h4: Pao
g1, f3: Vao
e1, a4, f8: Nao
b1, b6: Leo

Solution

{

Set play :
} 1...Kd5-c6 2.Ba6-b7 # {
} 1...Kd5-e6 2.Qf2-c5 # {
} 1...LEb6-c6 2.Ba6-c4 # {

Real play :
} 1.Qf2-e2 ! {(threatens} 2.Qe2-c4 # {)
Black king now has the 4 squares c6, c5, e6 & d4. In each thematic variation,
c6 will be taken over by the Vao f3, and the other 3 squares cyclically.
} 1...LEb6-c5 {(blocking c5, giving Nao a4 control of e6)} 2.Qe2-e4 # {(resuming d4. Not } 2.Qe2-c4 + ? Kd5-c6 {.)
} 1...LEb6-e6 {(blocking e6, giving Nao f8 control of d4)} 2.Sg3-e4 # {(resuming c5. Not} 2.Qe2-c4 + ? Le6*c4 {)
} 1...LEb6-d4 {(blocking d4, giving Vao g1 control of c5)} 2.LEb1-e4 # {(reuming e6. Not} 2.Qe2-c4+? PAh4*c4 {.)
} 1...Kd5-c6 2.Qe2-b5 # {
} 1...Kd5-e6 2.Ba6-c4 # {
} 1...Kd5-d4 2.Qe2-d3 #

4 - h#2 4 solutions with imitation pieces (black King and white Bishop)

imitation pieces can move normally but also like the pieces they threaten,
or like those of their side they control

Stun, J.
2020

white Kf7 Be5 black Pb5c2e2 Sd4 Ke4

h#2 bK & wB imitation pieces(2+5)
4 solutions

Solution

{

} 1.Ke4-c3 Be5-c4 + {(has played as a knight and checked as a king !)} 2.Kc3-a1 Bc4-c3 # ! {(playing as a black pawn or as a white king)
} 1.Ke4-a8 Be5-d7 2.Sd4-f3 Bd7-c6 # ! {
} 1.Ke4-h1 Be5-g4 2.Sd4-c6 Bg4-f3 # ! {
} 1.Ke4-h7 Be5-g6 + 2.Kh7-h8 Bg6-f6 # {

4 corners for Black King.}

5 - h#2 sentinels b) sentinels opposit pawns

Sentinels In Sentinels, each playing figure leaves a pawn on its starting square (except the 1st or 8th row),
provided that the number of pawns on the same side does not exceed 8.
In Sentinels in opposit pawn, the pawn left is the opponent's colour.

De Haas, B.
2020

white Sb7 black Ka6 Ba7

h#2 Sentinels(1+2)
b) sentinels opposit pawns

Solution

{

} a) {sentinelles
} 1.Ba7-b6[+bPa7] Sb7-d6[+wPb7] 2.Bb6-a5[+bPb6] b7-b8=S # {

} b) {opposit pawns
} 1.Ba7-c5[+wPa7] a7-a8=S 2.Bc5-a7[+wPc5] Sa8-c7 # {(it is well checkmate because the capture of Nb7 leaves a white pawn on a6.
With picture :} 3.Ka6*b7[+wPa6] {)}

6 - h#4 kobul Kings b) bNg8 to b8

Kobul Kings When a figure is captured, the king of the side of the figure acquires its march.
He becomes a normal King again if a pawn is captured.

Tritten, P & Foster G
2018

white Pf2 Ke1 Bc1 black Pg7 Ke8 Sg8

h#4 Rois Kobul(3+3)
b) Cg8 --> b8

Solution

{

} a) {
} 1.Sg8-h6 Bc1*h6[e8=rS] 2.rSe8-f6 Ke1-e2 3.rSf6-g4 f2-f3 + 4.rSg4-h2 Bh6-f4 # {

} b) bSg8-->b8 {Ng8 --> b8
} 1.Ke8-f7 Bc1-f4 2.Kf7-g6 Bf4*b8[g6=rS] 3.rSg6-h4 Bb8-g3 + 4.rSh4-g2 + Ke1-f1 #

7 - serial selfmate 12# circe madrasi

serial selfmate White plays n legal moves in a row and forces Black to mate in 1 move
circe a captured piece is reborn on its original square if it is free, otherwise it disappears
madrasi two opposing pieces of same nature which observe each other are paralysed

Wenda, K.
1988

white Pb6c6d2c4b3 Kh2 Rc2 Ba1 black Bb7e5 Ka8 Qc5 Pg2 Sd6g3 Re2

ser-s#12 circe madrasi(8+8)

Solution

{

If we start immediately with} 1.Kh2*g3[+bSb8] 2.Kg3-h2 3.c6*b7[+bBc8] + {Black's reply is not} 3...Ka8*b7[+wPb2] # {but rather } 3...Bc8*b7[+wPb2] { the field must therefore be prepared

} 1.Rc2-c1 2.d2-d4 3.Ba1-c3 4.Bc3-a5 {

} 5.Rc1-a1 6.Ra1-a2 7.Ba5-c3 8.Bc3-a1 {

} 9.d4-d5 10.Kh2*g3[+bSb8] 11.Kg3-h2 12.c6*b7[+bBc8] + Ka8*b7[+wPb2] # {(as } 12...Bc8*b7[+wPb2] {will be a self-check}

8 - 2# annan

Annan a unit acquires the march of the friendly unit "below" it (on the south)

Gockel, H.
2014

white Be2f5 Kh1 Qc4 Pc5d2g7 Se5f7 Rg4 black Qh6 Pc6d4e3d3h2h3 Kh5 Bg5

#2 Annan(10+9)

Solution

{

Essai :
} 1.Bf5*d3 ? {(blocus)} 1...Qh6-e6 ! 2.Rg4-f4 + Qe6-g4 {
} 1...Qh6-d6 ? 2.Rg4-f4 # {but neither } 2.Rg4*d4 + ? Kh5-h4 ! {nor} 2.Rg4-e4 + ? Kh5-g6 ! {
} 1...Qh6-g6 ? 2.Rg4-e4 # {using the blocking of g6 (and the Knight, walking as the Rook e4, pins Bg5, which walks as Queen g6),
but not 2 Bxg6? illegal, white bishop moving as Pd2, nor} 2.Rg4-f4 + ? Bg5-g4 ! {
} 1...Bg5-e7 ? 2.Se5-g6 # {(double check by Pc5 and Pg7)
} 1...e3*d2 ? 2.Rg4-f4 # {(} 2...Kh5*e2 ? {illegal, Bd3 becomes again a Bishop !)

} 1.Se5*d3 ! {blocus
} 1...Qh6-d6 2.Rg4-e4 # {(Ni} 2.Rg4*d4 + ? Kh5-h4 ! {ni} 2.Rg4-f4 + ? Kh5-g6 ! {)
} 1...Qh6-g6 2.Rg4-f4 # {(Bf5, moving as Rf4, pins Bg5 which moves like a Queen)
} 1...Bg5-e7 2.Bf5-g6 # {(double check by Pc5 and Bg6)
} 1...e3*d2 2.Rg4-e4 # {(2...Kxe2? illegal Due to the Rook)

Mats exchanged AB-BA. Two other mats changed.}

9 - 2# bicaptures

bicaptures any unit can take units from its own side as well as from the opposing side.

Bakcsi, G.
1971

white Bc4 Ka8 Qg3 Pa7c6e6f5g5e4e3 Se2a5 Rb8 black Pc7e7g4e5c5 Kd6

#2 bicaptures(13+6)

Solution

{

} 1.Rb8-d8 + ? Kd6*e7 ! {
} 1.Se2-d4 ? c5*d4 ! {

} 1.Se2*g3! {
} Kd6*c7 2.a7*b8=Q # ! {
} 1...Kd6*e7 2.Sg3*f5 # {
} 1...Kd6*c5 2.Sg3*e4 # ! {
} 1...Kd6*e5 2.Sa5*c4 # {

Black King's Star.}

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