py_20180605

1 - h#2 bicaptures

Bedoni, R.
1985

white Pa7h7 Kh1 black Pd2e2 Ka2

h#2 bicaptures(3+3)

bicaptures : In Bicaptures, any unit may capture both units on its own side
. as well as those of the opposing side.

Solution

{

} 1.e2-e1=S ! {As a screen} h7-h8=B 2.d2-d1=Q {To control b1 & b3.} a7-a8=R# {it's really mat as} 3.Qd1-a4 {is illegal.
Note that} 2...a7-a8=Q + {is illegal because of} 3.Qa8*h1 ! {
It should also be noted that for the same reasons, the } 1...h7-h8=Q {is illegal
and finally, the move } 1.e2-e1=B {would allow an interposition in a5

AUW.}

2 - h#5 back-to-back

Tritten, P.
2018

white Ke1 Bc1 black Ph7 Ke8

h#5 back-to-back(2+2)

back-to-back : a piece having "behind" it an opponent piece captures the march
. To be more complete, we can say that the two pieces exchange their march

Solution

{

} 1.h7-h5 Bc1-h6 2.h5-d1=B {(pawn acquires the Bishop's march then promotes itself)} Bh6-g5 {
} 3.Ke8-d7 Bg5-d8 + {(King acquires the Bishop's march... and Bishop the King's one)
} 4.Kd7-h3 Ke1-f2 5.Bd1-g4 {(close diagonal h3-c8)} Bd8-h4 # {
The white Bishop acquires the King's march and thus attacks the black King which acquires the Bishop's march and thus has only the controlled squares g2 & f1.}

3 - h#9 2 sol avec zèbra & grasshoppers

Kotesovec, V.
2017

white Zb1 black Ke5 Ge6f4h5

h#9 2sol.(1+4)
🨷b1: Zebra
🨥e6, f4, h5: Grasshopper

: jumper (2,3)
: move on the Queen's lines with the help of a hurdle behind it it lands

Solution

{

} 1.Ge6-e4 Zb1-e3 2.Ke5-d6 Ze3-c6 3.Ge4-b7 Zc6-e3 4.Kd6-c7 Ze3-g6 {
} 5.Gh5-f7 Zg6-d8 6.Kc7-b8 Zd8-f5 7.Kb8-a8 Zf5-c7 8.Gf4-b8 Zc7-a4 {
} 9.Gf7-a7 Za4-d6 # {

} 1.Ke5-e4 Zb1-d4 2.Ke4-f3 Zd4-f7 3.Ge6-g8 Zf7-h4 4.Gh5-e2 Zh4-e6 {
} 5.Kf3-g2 Ze6-g3 6.Gf4-h2 Zg3-d5 7.Kg2-h1 Zd5-f2 8.Ge2-g2 Zf2-h5 {
} 9.Gg8-g1 Zh5-e3 # {

Echo from a corner to the other.}

4 - 2# disparates anti-andernach

Petkov, P.
2010

white Qh7 Ka8 Ra3h2 Sb5g6 Be6 black Pd5d6g5g4 Bh4 Rc1 Ke4

#2 disparates(7+7)
anti-andernach

: if one side plays a piece, the opposite side may not play a piece of the same kind in reply.
. : a unit that plays without capturing changes colour

Solution

{

} 1.Rh2-h1[+bRh1] ! {Blocus. Neither Rc1 nor Rh1 are allowed to play.
5 legal moves left.
} 1...g4-g3[+wPg3] 2.Sg6-e5[+bSe5] # {
} 1...d5-d4[+wPd4] 2.Sg6-f4[+bSf4] # {(} 2.Sb5*d6 ? Ke4*d4 {)
} 1...Bh4-g3[+wBg3] 2.Sg6-h4[+bSh4] # {
} 1...Bh4-f2[+wBf2] 2.Sb5*d6 # {
} 1...Bh4-e1[+wBe1] 2.Qh7*h1 #

5 - h#2 anti-circe

Wenda, K.
2009

white Pf2f7 Kc8 Bg1 black Pe2e7a5 Ka6

h#2 anti-circe(4+4)
b) ♟a5-->b5

: The captured piece is reborn on its original square if it is free and the captured piece disappears
Of course, if the rebirth square is occupied, the capture is illegal

Solution

{

} a) {
} 1.e2-e1=S f2-f3 2.Se1*f3[bSf3->g8] f7*g8=B[wBg8->f1] #{

} b) bPa5-->b5 {pa5-->b5
} 1.e2-e1=Q f7-f8=R 2.Qe1*f2[bQf2->d8] + Rf8*d8[wRd8->a1] # {

AUW}

6 - h=2,5 2 sol parrain circe

Rallo, V.
2017

white Sc8 Kd5 black Pd6 Kd8 Sc5

=2,5 parrain Circe(2+3)
2sol.

: a captured piece remains "in the air" above the capturing square
and it makes an equipollent move to the following move

Solution

{

} 1...Sc8*d6 2.Sc5-b7[+bPc8] Kd5-e5 3.Sb7*d6 Ke5*d6[+wSc7] {=

} 1...Kd5*d6 2.Kd8*c8[+bPc6] Kd6*c6[+wSb8] 3.Sc5-d7[+bPd8] Sb8*d7 {=

Echo-chameleon.}

7 - sérial h=12 anti-circe

Ersek, T.
2012

white Pg6d2f4 Ka8 Rf1 Se6 Bd1 black Pe7h7g5h2d3 Bb1 Rh1 Kh6

ser-h=12 anti-circe(7+8)

Solution

{

} 1.Rh1-g1 2.h2-h1=R 3.Rh1-h2 4.Rh2*d2-h8 {
} 5.d3-d2 6.Bb1*g6-c8 7.Bc8-d7 8.Bd7-e8 {
} 9.Be8-f7 10.Bf7-g8 11.g5*f4-f7 12.Rg1-g6 Rf1-f6 {stalemate !}

8 - 7# with siren & tritons

Rehm, HP.
2015

white Bd7 Ke7 WTg3 SIf6 Pe3 Sc3 black Pg6c4d3 Ke5 Ba8 BTd4 Rg1a1

#7(6+8)
🨴f6: Siren
🨵g3, 🨻d4: Tritons

: In the marine family, we play normally but we capture in the locust way.
This is a Siren (Queen marine) on f6, these are Tritons (Rooks marine) on d4 & g3

Solution

{

Triton d4 is pinned by the Siren f6.
Try:
} 1.SIf6-e6+? TRd4-e4 ! {
} 1.TRg3-f3? {threatens} 2.SIf6-d6+ TRd4-f4 3.TRf3*f4-f5 # {
but} 1...Ra1-a6 ! {solves the problem

. Hence the key :} 1.SIf6-d6 + !{
} 1...TRd4-f4 {now the Triton f4 is pinned by the Siren d6
} 2.TRg3-f3 {threatens} 3.TRf3*f4-f5 # {by double check
} 2...Ba8*f3 {crossing the critical square e4
} 3.SId6-d4 + {3 Sie6+? Fe4 4 Sif6+ Trxf6-f7} TRf4-f6 4.SId4-f4 + TRf6-d6 {
} 5.SIf4-f6 + {the g6 pawn protects the Siren from the assiduousness of the Triton
} 5...TRd6-d4 {diagram without Triton g3 and with bB in f3 instead of a8
} 6.SIf6-e6 + {
} 6...Bf3-e4 7.SIe6-d6 # {
} 6...TRd4-e4 7.SIe6-d5 # {

Grimshaw interception).}

9 - 2# amu

Rosner, E & Gockel H
2017

white Qa5 Pa7d4c2c5 Sd1f1 Bg4e5 Ke6 black Pa4b2e2 Sb1h1 Ba3 Ke4

#2 amu(10+7)
b) ♙c5-->b4

: a move can only checkmate if, at the start, the checkmating unit
is "observed" by one and only one enemy unit.
In the case of a battery, it is the one playing, not the one being unmasked.

Solution

{

} a) {
} 1.Qa5-e1 ! {Blocus
} 1...Sb1-d2 2.Sd1-c3 # {(} 2.Sf1*d2 ? {is illegal, the N being "observed" by 2 pieces)
} 1...Sh1-g3 2.Sd1-f2 # {(in the same way,} 2.Sf1*g3 ? {is illegal)
} 1...Sh1-f2 2.Sf1-g3 #{(} 2.Sd1*f2 ? {illegal)
} 1...Sb1-c3 2.Sf1-d2 #{(} 2.Sd1*c3 ? {illegal)
} 1...Ba3-b4 2.Qe1*e2 #{
} 1...Ba3*c5 2.a7-a8=Q # 2.a7-a8=B #{

} b) wPc5-->b4 {pc5-->b4
} 1.Bg4*e2 ! {Blocus
} 1...Sb1-d2 2.Sf1*d2 #{
} 1...Sb1-c3 2.Sd1*c3 #{
} 1...Sh1-g3 2.Sf1*g3 #{
} 1...Sh1-f2 2.Sd1*f2 #{
} 1...Ba3*b4 2.Qa5-d5 # {
Note that } 1.Qa5-d5 ? {is illegal, as the Queen is not "observed" at all at the start of the move

AB-BA & CD-DC.}

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