py_20210216

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1 - 2# with chinese piece

chinese piece Move normaly, but need a hurdle to capture
Mao Mao is a particular case of Chinese piece, it is a Crawling Knight
with first a Rook step and then a Bishop step

Monréal, P & Calvet F
1973

white VAh6c5e3 PAa6f1 Ka2 Qa7 Pb3d5h5 Sd3h8 Rg1g5 black VAd4 Kf6 MAc3h2h4c4b8d8 Sg8 Ph7

#2(14+10)
a6, f1: Pao
h6, c5, e3, d4: Vao
d8, b8, c4, c3, h4, h2: Mao

Solution

{

Essais :
} 1.Qa7-g7 + ? VAd4*g7 ! {
} 1.Qa7-c7 ? {(menace} 2.Qc7-e5 # {)} 1...VAd4-e5 ! {(d4 square having been released, the Vao e5 is protected by the Mao c4)
} 1.Sd3-e5 ? {(menace} 2.Qa7-g7 # {)} 1...VAd4*a7 ! 2.VAc5-d4 + Kf6-e7 {
} 1.Sd3-f2 + ? MAh2*f1 {(and e4 square is controlled by the Mao c3)

} 1.Rg5-e5 ! {(threatens} 2.Qa7-g7 #{
and in order to avoid this, it is necessary, apart from the grip of the threatening pieces, to interpose in the 7th or on the column g)
} 1...MAb8-d7 2.Qa7-b6 # {
} 1...MAd8-b7 2.d5-d6 # {
} 1...MAh2-g4 2.VAe3-f2 # {
} 1...MAh4-g2 2.VAh6-f4 # {display-departure-file} {
} 1...VAd4*a7 2.VAc5-d4 # {display-departure-file} {
} 1...VAd4*g1 2.VAe3-d4 # {display-departure-file} {
} 1...Sg8-e7 2.Qa7*e7 #

2 - réflex 2# anti-circe

réflex When a mat is submitted to one of the two sides, he is forced to play it.
Anti-Circe A capturing piece reborn on its original square and the captured piece disappears.
When the renaissance square is not free the capture is illegal unless the capture and renaissance square are the same
in which case a distinction is made between the Calvet type ( authorised capture) and the Cheylan type (prohibited).

Rehm, HP & Millour RJ
1996

white Ba6c3 Ke5 Qf7 Pc5d7e6f6g6g3 Sa5g2 Rh2a3 black Be8 Kf3 Qb5 Pf2 Sg7e2 Rb6d3

r#2 Anti-Circe(14+8)

Solution

{

Essais :
} 1.Sg2-e1 + ? f2*e1=S[bSe1->b8] ! 2.Ke5-f4 # {

} 1.Bc3-e1 ! Rb6-b7 {(threat variant)} 2.Qf7*e8[wQe8->d1] Kf3-e4 # {
} 1...Kf3-e4 ? {White plays a legal move ad libitum forcing } Be8*f7[bBf7->c8] # {(and not} 2...Be8*d7[bBd7->c8] {cause } 3.Qf7-e8 { and the White King is no longer be able to be captured)
} 1...f2*e1=R[bRe1->h8] 2.d7*e8=R[wRe8->h1] Rh8-h5 # {
} 1...f2*e1=B[bBe1->f8] 2.d7*e8=B[wBe8->f1] Bf8*c5[bBc5->f8] # {
} 1...f2*e1=S[bSe1->b8] 2.d7*e8=S[wSe8->b1] Sb8-c6 # {
} 1...f2*e1=Q[bQe1->d8] 2.d7*e8=Q[wQe8->d1] Qd8-c7 # {
} 1...Kf3-g4 2.Qf7*e8[wQe8->d1] Kg4-f5# {
} 1...Rd3-e3 + 2.Ke5-d5 Rb6-d6 # {
} 1...Qb5-b2 + 2.Ke5-e4 Be8*f7[bBf7->c8] # {
} 1...Rd3*a3[bRa3->h8] 2.d7*e8=R[wRe8->h1] Rh8-h5 # {
} 1...Be8*d7[bBd7->c8] 2.Qf7-a7 {(ou ailleurs)} Kf3-e4 #

3 - h#2 3 solutions andernach

Andernach after a capture, the workpiece changes its colour.

Lois, J & Kapros J
1996

white Ke6 Rb1g6 Bd4f3 black Qd3 Pf2h2h5c4 Kg1 Bf1g3

h#2 andernach(5+8)
3 solutions

Solution

{

} 1.Qd3*b1=wQ Bd4*f2=bB 2.Bf2-a7 Qb1-b6 # {

} 1.Qd3*d4=wQ Rg6*g3=bR 2.Rg3-g8 Qd4-g7 # {

} 1.Qd3*g6=wQ Rb1*f1=bR 2.Rf1-a1 Qg6-b1 # {

Cyclic destruction of pins.}

4 - h#2 with Witch (Orphelin + Ami)

Witch is either an Orphan and a Friend
Orphan adopts the moving way of the opposing units attacking it.
Friend adopts the moving way of it's side units protecting it
Witches who receive such a power transmit it in turn.

Brown, DL.
2020

white Sg2 Kh1 Oc6 black Kc4 Oe3

h#2(3+2)
b) Cg2-->g1
c6, e3: witches

Solution

{

} a) 1.Oe3-d5 {(Witche adopt way of moving of Ng2.)} Sg2-f4 2.Kc4-d4 Oc6*d5 # ! {
Witch c6 took the march of Witch d5 who also had the march of a King.
And the said Witch, always having the walk of a King, also has the walk of Nf4 and controls c3 & e3.
Note that this Witch finally controls 7 squares !

} b) wSg2-->g1 {Cg2-->g1
} 1.Kc4-d3 Sg1-f3 2.Oe3-d4 {(King's walk)} Oc6*d4 # ! {(Witch walks as a Knight, then as a Knight + King)

Chameleon Echo.}

5 - 4# circe with nightrider b) -Pf5

Circe A captured piece reborn on its original square.
Nightrider Knight extended in successive jumps

Werner, D.
2002

white Sa3 Pd4 Kf6 Rc4 Bf3c1 black Pf5a4g2 Sf7 Bd7 Kd3 Nb7

#4 circe(6+7)
b) -pf5
b7: Nightrider

Solution

{

} a) {
Try :} 1.d4-d5 ? {(threating} 2.Bf3-e2 # {)
} 1...g2-g1=N 2.Bf3-e2 + 2...Ng1*e2[+wBf1] 3.Bf1*e2[+bNe1] # {but} 1...g2-g1=S ! {protect against the threat because the capture of the Knight would be illegal.:} 2.Bf3-e2 + 2...Sg1*e2[+wBf1] 3.Bf1*e2[+bSg8] {

} 1.Bc1-d2 ! {(threating} 2.Rc4-c3 + 2...Kd3*d4 3.Sa3-c2 # {)
} 1...g2-g1=N {(contrôle c3)} 2.d4-d5 {(menace} 3.Bf3-e2 + 3...Ng1*e2[+wBf1] 4.Bf1*e2[+bNe1] # {

} b) -bPf5 {without pf5
Try :} 1.Bc1-d2 ? {(threating} 2.Rc4-c3 + 2...Kd3*d4 3.Sa3-c2 # {) but} 1...g2-g1=N ! {protect against the threat by c3 control } 2.d4-d5 {(threating Be2+)} Bd7-g4 ! {

} 1.d4-d5 ! {(threating} 2.Bf3-e2 # {)
} 1...g2-g1=S 2.Bc1-d2 {threating} 3.Rc4-c3 + 3...Kd3-d4 4.Sa3-c2 # {, et sur } 2...Sg1-e2 3.Bf3-e4 # {mating
} 1...g2-g1=N 2.Bf3-e2 + 2...Ng1*e2[+wBf1] 3.Bf1*e2[+bNe1] # {
} 1...Bd7-g4 2.Bf3-e2 + 2...Bg4*e2[+wBf1] 3.Bf1*e2[+bBc8] # {

Try of (a) become solution of (b) and vice versa.
Switching the 1st & 2nd moves from one twin to the other.}

6 - h#2 volage with lions b) doubles Grasshoppers

volage Any unit that changes its square colour also changes its colour. But only once!
lion piece playing on the Queen's lines with the help of a hurdle

double sauterelle makes two grasshopper movements

Grasshopper moves on the Queen's lines with the help of a hurdle behind which she lands.

Basic, B.
2017

white Pa6b5d3a4b2 Kd7 LIa2 black Pc4e5c5 Kb6 LIc7

h#2 volage(7+5)
a) a2, c7: Lion
b) a2, c7: Double Grasshopper

Solution

{

} a) {a2, c7: Lions
1.Lia5? Lif2 would be mate if we weren't in volage rule !
En image :} 1.LIc7-a5 LIa2-f2=b ! {
it is therefore necessary to switch pieces
} 1.LIc7-h2 LIa2-a5[+bLIa5] 2.LIh2-a2[+wLIa2] LIa2-f2 # {

} b) +wDGa2 +bDGc7 {a2, c7: Double Grasshoppers
} 1.DGc7-d6 {(via f4)} DGa2-a7[+bDGa7] {(via a5)} 2.DGd6-a2[+wDGa2] {(via d2)} DGa2-d2 # {
Mate via d4, control of a5 via a2.}

7 - series h#7 anti-circe transmuted Kings

transmuted Kings King takes the march of the piece that checks him

Harris, P.
2008

white Kg8 black Bb2f3 Kc1 Qc3 Pb3g6f6d6 Sd1 Rd3

ser-h#7 Anti-Circe(2+15)
transmuted Kings

Solution

{

} 1.Bf3-a8 2.Qc3-c6 3.Bb2-e5 4.Kc1-b2 5.Kb2-a3 6.b3-b2 7.Qc6-e8 + {(WK takes BQ march)
} Kg8-b3 # {
White King cannot be captured, neither by the BK (renaissance e8), nor by the BR (renaissance a8).
And it mates because no black unit can occupy e1.}

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