py_20251104

1 - aidé 2# 4 solutions with radial leaper, Alfil super-circe

Soulivy, K.
2017

neutral Qe2 ALf3 white RKc8 black Kd3

h#2 4sol. Super-circe(1+1+2)
🨍c8: radial leaper
🩂c8: neutral Alfil

: it can move to any square that is the same distance from an enemy unit as the one it is currently on.
For example, a6 because the "ray" a6-f3 is equal to c8-f3.
: (bouncer 2-2) that is, two diagonal steps
: The capturing side may place the captured unit wherever it wishes, within the limits of legality.

Solution

{

} 1.Kd3*e2[+nQg5] RKc8-c2 {(the distance c2-g5 is equal to c8-g5)} 2.Ke2*f3[+nALe6] RKc2*e6[+nALd4] # {
It's quite checkmate: the neutral bishop controls f2, the radial leaper controls f3, e4 and e2.
all squares one knight move away from g5 or d4, such as e6.
A move by the neutral Queen or Alfil does not prevent checkmate; both pieces would need to be moved at the same time.

} 1.Kd3*e2[+nQf4] RKc8-b1 2.nALf3-d5 RKb1*d5[+nALc3] # {

} 1.nQe2-e5 RKc8-b7 2.Kd3-c4 RKb7*f3[+nALd2] # {

} 1.Kd3-d4 nALf3-d5 2.Kd4*d5[+nALf4] RKc8*e2[+nQc3] # {

Quadruple echo.}

2 - 2# anti-circe

Cheylan, Y.
1991

white Sa7 Re8 Pa5e4c3b3a3 Kc2 Bd3 Qe3 black Pb6c6e5 Rb5f1 Kc4 Bh2

#2 Anti-circe(10+7)

: After a capture, the capturing piece is returned to its original square if it is free.
If the rebirth square is not free, capture is not possible. In a situation where the capture and rebirth squares are identical, there are two types of anti-Circe :
The Calvet type, in which this capture is permitted, and the Cheylan type, in which it is prohibited.
Of course, we are here in the Cheylan type where Bxf1 is forbidden.

Solution

{

Tries :
} 1.b3-b4 ? {(threatens} 2.Kc2-b3 # {)} 1...Bh2-g3 ! 2.Kc2-b3 + Bg3-e1{
} 1.Bd3-e2 ? {(threatens} 2.Kc2-d3 # {)} 1...Rb5-d5 ! {but not} 1...Rb5*b3[bRb3->a8] 2.Kc2-b3 # {
} 1.Kc2-b2 + ? 1...Kc4-b4 ! {but not } 1...Rb5*b3[bRb3->a8] 2.Kb2-b3 # {
} 1.Kc2-d2 + ? 1...Kc4-d5 ! {or} 1...Rb5*b3[bRb3->a8] {

} 1.Re8-a8 ! {(threatens} 2.Kc2-b1 # {)
} 1...Rb5-b4 2.Kc2-b2 # {(} 2.Kc2-b1 + ? Kc4-b5 ! {)} 1...Rb5*a5[bRa5->h8] 2.Kc2-c1 # {
} 1...Rb5-d5 2.Kc2-d2 # {
} 1...Rb5-c5 2.Kc2-d1 # {

A total of seven White King's mates.}

3 - 2# breton

Loustau, JM.
2018

white Bc8f6 Sb7a5 Rc4e1 Pe5 Kd1 black Pc6 Kd5 Bh2 Rh5

#2 breton(8+4)

: After each capture, a unit of the same type must be removed (if possible) from the capturing side.

Solution

{

Try :} 1.Rc4*c6[-e5] ? 1...Bh2-e5 ! 2.Bc8-e6 + Kd5-d4 {(} 1...Rh5-e5 ? 2.Rc6-d6 # {)

} 1.Bc8-d7 ! {(threatens} 2.Bd7*c6[-e5] # {)
} 1...Rh5-g5 {(threat variation)} 2.Bd7*c6[-e5] # {regaining control of square e6
} 1...Rh5*e5[-c6] 2.Rc4-d4 # {(because} 2...Kd5*d4[-e5] {is illegal)
} 1...Bh2*e5[-c6] 2.Bd7-e6 # {(because} 2...Kd5*e6[-e5] {is illegal)
} 1...c6-c5 2.Rc4*c5[-e5] # {regaining control of square d4 (} 2.Bd7-c6 + ? Kd5-e6

4 - h#8 4 solutions PWC with beetle and nightrider leaper

Kotesovec, V.
2022

white SCd1 Ge4 black Nh4 Kd3

h#8 4sol. PWC(2+2)
🨷d1: beetle
🨟e4: Grasshopper
🨨h4: Nightrider leaper

: Grasshoppers performing a knight's move from the jump, but with a slight angle :
The d1 beetle, with the d3 jumper, controls c5 and e5.
: moves along the Queen's lines using a jump and arrives just behind if the square is free or occupied by an opposing unit
: Extended knight in several successive steps, the last one requiring a jumper
: The captured unit is reborn where the capturing unit was at the start of the move.

Solution

{

} 1.Kd3*e4[+wGd3] SCd1-e5 2.Ke4-f5 Gd3-g6 3.Nh4-f8 Gg6-e4 4.Kf5-f6 Ge4-e6 {
} 5.Nf8-d4 Ge6-g6 6.Kf6-g7 Gg6-g8 7.Kg7*g8[+wGg7] Gg7*d4[+bNg7] 8.Kg8-h8 Gd4-f6 # !{

} 1.Kd3-c4 Ge4-b4 2.Kc4-d3 SCd1-e5 3.Kd3-c3 Gb4-d2 4.Nh4-b1 SCe5*b1[+bNe5] {
} 5.Kc3-c2 SCb1-d4 6.Kc2-b2 Gd2-a2 7.Kb2*a2[+wGb2] Gb2*e5[+bNb2] 8.Ka2-a1 Ge5-c3 # ! {

} 1.Kd3-c2 Ge4-b1 2.Kc2-d2 Gb1-e1 3.Nh4-b1 Ge1-c3 4.Nb1-d5 Gc3-e1 {
} 5.Kd2*e1[+wGd2] SCd1-e4 6.Ke1-f2 Gd2-g2 7.Kf2-g1 Gg2*d5[+bNg2] 8.Kg1-h1 Gd5-f3 # ! {

} 1.Kd3-d4 SCd1-e6 2.Kd4-d5 SCe6-b4 3.Kd5-d6 SCb4-g3 4.Nh4-b7 SCg3-c8 {
} 5.Kd6-c6 Ge4*b7[+bNe4] 6.Kc6-c7 SCc8-d5 7.Kc7-b8 Gb7*e4[+bNb7] 8.Kb8-a8 Ge4-c6 # ! {

Quadruple echo in each corner.}

5 - serial h#8 with Grasshoppers

Cameron, K.
2020

white Ge5 Kf6 Pb2 black Gg3g2 Kf2 Qe3 Rc3 Se2 Be1f1

ser-h#8(3+8)
🨥g3, g2: Grasshoppers

Solution

{

Essais :
} 1.Se2-g1 2.Gg2-e2 3.Bf1-g2 4.Kf2-f1 5.Be1-f2 6.Gg3-e1 7.Qe3-g3 8.Rc3-e3 Ge5-a1 # ! {

Umnov Theme.
Note that 7...Qg3 is by no means a "Bristol clearance" for the Rook.
whereas the Queen is essential to the mate (preventing 9...Ge1-g3).}

6 - h#2 2 solutions Relegation chess

Smits, G.
2017

neutral Rh8 Pg7 white Kg5 black Rf8 Kc8 Pb7c7

h#2 2sol. Relegation chess(1+4+2)

: Any piece (except the King) reaching its second row becomes a pawn.

Solution

{

} 1.Rf8-d8 nPg7-g8=nS 2.nSg8-e7=nP nPe7*d8=nR # {

} 1.Rf8-e8 nPg7-g8=nB 2.nBg8-f7=nP nPf7*e8=nQ # {

Promotions to neutral queens (d8 & g8) are prohibited because they check Kg5.
AUW.}

7 - h#6 annan ultra-check b) bNh4

Wakashima, T.
2023

white Rc1 Ke1 black Rd2 Sd4 Ke3

h#6(3+3)
Annan
Ultra-check
b) Nd4 --> h4

: a unit acquires the movement of the friendly unit located ‘below’ it (to its south)
: Black must check on every move.

Solution

{

} a) {
} 1.Rd2-d3 + Ke1-f1 2.Rd3-f2 + Kf1-e1 3.Sd4-c2 + Rc1*c2 4.Ke3-f3 + Ke1-d2 5.Kf3-g2 + Kd2-c1 6.Kg2-f1 + Rc2-d1 # {

} b) bSd4-->h4 {Nd4-->h4
} 1.Ke3-d3 + Ke1-f2 2.Rd2-c2 + Kf2-g3 3.Sh4-f5 + Kg3-g4 4.Rc2-c4 + Rc1*c4 5.Sf5-e3 + Kg4-g3 6.Kd3-e2 + Kg3-f2 # {

}

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