py_20190205

Click in the right part of the chessboard to move forward, left to move backward... or directly on the move in the solution

1 - inverse aidé 3# eiffel

Eiffel : In Eiffel chess (invented by Petkov), the units paralyse in the P-C-F-T-D-P cycle.

Parrinello, M
2008

white Bc1 Ka1 Qe7 Pe2f3h2d4a2 Sh6 Rb1g1 black Pd2g2g5a3a5 Kf4

hs#3 Eiffel(11+6)
b) Bb1

Solution

{

} a) {
} 1.Rg1-h1 g2*h1=B 2.Rb1-b7 Bh1*f3 {(paralysing the Rook)} 3.e2-e3 + d2*c1=Q #{(Pawn is paralysed by the Queen)

} b) +wBb1 {Bb1
} 1.Rg1-f1 g2*f1=S 2.Bb1-f5 Sf1-e3 {(paralysing the Bishop)} 3.Qe7-c7 + d2*c1=R # {(Queen is paralysed by the Rook)

AUW.}

2# with eagles, moose, sparrow, hamsters and paos

Eagle, moose, sparrow & hamster: Eagles (90 degree angle to the sautoir) on a4 & f1
. (control c2, e4 & g4, and especially prevents ...Ke5,
a moose (45 degree angle with the sautoir) on d8, the Md8 controls b7 & f7
a Sparrow (135 degree angle with the sautoir) in a2; the Sparrow a2 controls b3 & f6
and Hamsters (180 degree angle with the sautoir) in b1, b8, c1 & c8, the Hb1 controls b3 & e4.
pao: rook needing a sautoir to capture
. Thus, a promotion f7xe8 or a move by Nf5 would check the black king by discovering the Pao f8

Caillaud, M.
2017

white Bh1 EAf1 Kh3 Md8 Pf7 Sc6f5 PAf8g1 SWa2 black PAe8 Kf4 EAa4 Ph6b4 Sb7 Ra6 HAb1c1b8c8

#2(10+11)
f1, a4: Eagles
f8, g1, e8: Paos
b1, c1, b8, c8: Hamsters
d8: Elan
a2: Sparrow

Solution

{

apparent play :
} 1...HAc1-e3 {(sautoir f4) } 2.Sf5-g3 # {square g5 being taken over thanks to Pao g1
} 1...HAb1-e4 2.f7*e8=SW # {retaking control of f5
} 1...HAb8-e5 2.f7*e8=EA # {idem
} 1...HAc8-e6 2.f7*e8=M # {idem

Try :
} 1.f7*e8=Q + ? Kf4*f5 ! {and on} 2.Qe8-f7 {, King escape with} Kf5-g5 {taking advantage of the absence of a sautoir in f5

} 1.Sc6-d4 ! {threatening} 2.Sd4-e2 # {
} 1...HAc1-e3 2.f7*e8=SW # {by double check
} 1...HAb1-e4 2.f7*e8=EA # {idem
} 1...HAb8-e5 2.f7*e8=M # {idem
} 1...HAc8-e6 2.Sf5-g3 # {by the Pao f8, ...Rf6 being forbidden, while a promotion would be parried by EAa4-f7
} 1...Ra6-e6 2.Sd4*e6 # {

"Lacny" Cycle ABCD-BCDA.}

3 - h#3,5 Royal Dynasty

Royal Dynasty : In Royal Dynasty (an invention of the Slovenian problemist J. Nastran),
a side may have several "Kings", who have no royal prerogatives, who may be left in check and captured,
except... if only one is left !

Quah, J & Watson & Wissma
2017

white Ph7 Ka6 Bh1 black Ph2 Kf7 Ra8 Sd7e4 Ba4

h#3.5(3+6)

Solution

{

} 1...Ka6-b7 ? {seems forced, but no, it is only the thematic try, since it will be played on the 4th move

} 1...h7-h8=K {("parry" the check because now a6 is a non-royal King, like h8 itself !)
} 2.Kf7-e8 {(is cooking up a big surprise)
} Bh1*e4 3.h2-h1=K {(now it is e8 who is a non-royal King)
} Be4*h1 {(new consecration of the Ke8 -- thanks to the bishop! -- who, reset, can castle !)
} 4.0-0-0 Ka6-b7# ! {the impostor king can afford this privity thanks to his colleague h8.

Let us specify that the favourable prejudice applies concerning the right to castling of the rook,
which is not forced to have played the move preceding the diagram (...Ta8+):
there may have been a white pseudo-king capture like ...Nxe4.}

4 - serial #7 einstein

einstein : In Einstein, a unit (other than the King) changes at each move into the unit immediately stronger if unit captures, immediately weaker if unit does not capture.

Bedoni, R.
2018

white Pc2 Ke1 black Qd8 Pc7b7e7f7 Ke8 Bc8

ser-#7(2+7)

Solution

{

} 1.c2-c4 2.c4-c5 3.c5-c6 4.c6*b7=S 5.Sb7*d8=B 6.Bd8*c7=R 7.Rc7*c8=Q #

5 - h#2,5 circé R.I.

Circe King Inclusive (Rex Inclusiv) : In Circe Kings Inclusive, a King is in check only if its rebirth square is occupied.
. And it is only mate if that square cannot be vacated.

Borst, D.
2017

white Kc1 Ba4 Sc7 Nd1 black Bb3 Kc4 Qg8 Pe3 Sd8 Re1

h#2.5 Circe R.I.(4+6)
b) Rc1-->d6
c) Rc1-->e5

Solution

{

} a) {
} 1...Nd1-f2 {(does not put his King in check since} 2.Re1*c1[+wKe1] {would only take him back to his home e1)
} 2.Kc4-c3 Ba4-e8 3.Qg8-c4 Sc7-b5 # {e8 cannot be evacuated, NIf2 protects b4, Nb5 is taboo (it would be reborn in b1)

} b) wKc1-->d6 {Rc1-->d6
} 1...Nd1-b5 2.Bb3*a4[+wBf1] Bf1-d3 3.Kc4-d4 Sc7-e8 # {NIb5 is taboo (it would be reborn in b8)

} c) wKc1-->e5 {Rc1-->e5
} 1...Nd1*e3[+bPe7] 2.Re1*e3[+wNe8] Sc7-a6 3.Re3-c3 Ba4-b5 # {Bb5 is taboo (it would be reborn in f1).

Cycle mate piece / occupying piece e8 : NI/N N/B B/NI.}

6 - 2# kamikaze volage

Kamikaze : any unit that captures disappears immediately
. volage: any unit that changes its square colour also changes its colour. After which it goes quiet !

Davaine, A.
2004

white Kg7 white Kamikaze Pe2g2e5 Qd5 Rb1h6h2 Be3f5b8a3 ROd1 Sb3 black Kb6 black Kamikaze Qc6 Pf2g4e4h7b7a6 Rb4 Ba5a1 Sd4a4

#2(5+9)
Kamikaze volage
d1 : Rose

Solution

{

Tries :
} 1.kQd5-c4 ? {(threatening} 2.kROd1-d5 # {)} 1...kBa1-c3 ! {
} 1.kBf5*g4[-g4] ? {(threatening} 2.kBe3*f2[-f2] # {)} 1...kQc6-g6 + ! {
} 1.kBa3*b4[-b4] ? {(threatening} 2.kSb3*d4[-d4] # {)} 1...kBa1-b2 ! {
} 1.kRb1*a1[-a1] ? kRb4*b3[-b3] ! {
} 1.kQd5*c6[-c6] + ? Kb6-b5 ! {
} 1.kBe3*f2[-f2] ? kSd4*f5[-f5] ! {ou} 1...kSd4-e6=w 2.kBf5*g4[-g4] Qc6-d7 + ! {
} 1.kBf5-d7 ? {(threatening } 2.kBd7*c6[-c6] # {or} 2.kQd5*c6[-c6] # {)} 1...kQc6-g6 + !{

} 1.kBa3-b2 ! {blocus
} 1...kQc6-e6 2.kBf5*e6[-e6] # {
} 1...kQc6-g6 + 2.kBf5*g6[-g6] # {
} 1...kQc6*h6[-h6] 2.kRh2-h6 # {
} 1...kRb4*b3[-b3] 2.kBb2*d4[-d4] # {by double check
} 1...kRb4-c4=w 2.kRc4*c6[-c6] # {
} 1...kSa4-c3=w 2.kQd5*c6[-c6] # {b5 is controlled; (and not} 2.kBb2*a1 + ? Rb4-a4 ! {)
} 1...kSa4-c5=w 2.kSc5-d7 # {(the Knight remains white, because after a colour change it stabilises !)
} 1...kBa1*b2[-b2] 2.kSb3*d4[-d4] # {the rook being pinned like Na4
} 1...kPg4-g3=w 2.kBe3*f2[-f2] # {
} 1...kPf2-f1=kQ=w 2.kBf5*g4[-g4] # {
Note that} 1...kSa4*b2[-b2] {would be illegal, it is a self-check by the Rose d1 via b2 and a4
Note also} 1...kRb4-b5=w {which is also illegal

10 variations.}

7 - h#2,5 2 sol einstein chess

Gockel, H.
2016

white Re4 Ba1 Ke6 black Pa3b3 Ka5

h#2.5 Einstein Chess(3+3)

Solution

{

} 1...Re4-a4=B 2.Ka5-b4 Ba4-c6=S + 3.Kb4-a4 Ba1-c3=S # {

} 1...Re4-c4=B 2.b3-b2 Ba1*b2=R 3.a3-a2 Bc4*a2=R # {

Mat du couloir and mat de Musset in the same problem !}

8 - h#2 2 sol with locusts of diiferent king

Locust : moves with the help of a sautoir ... which it swallows!
As the Locust moves on the Queen's lines,
it is not necessary to specify on which lines the rook-locust and the bishop-locust move

Predrag, N.
2014

white Rf3 Kg4 Bc4 black LBd1 Ka8 Pa7 Sf5 Rh2 LRa4

h#2(3+6)
a4: Rook Locust
d1: Bishop Locust

Solution

{

} 1.Rh2-e2 Rf3-b3 2.Sf5-h4 Bc4-d5 # {

} 1.Sf5-d4 Bc4-a6 2.Rh2-h5 Rf3-f8 # {

Reciprocal unpins, in both possible forms.}

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