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1 - h#2 2 sol infra-fonctionaries

Infra-Fonctionaries you can play a unit unconditionally,
it is only to capture that one must be observed by an enemy unit

Capron, D & Sobrecases G
2008

white Se3 Rf3c1 Kg3 Bb1 black Pc3 Ke2

h#2 infra-fonctionaries(5+2)
2 solutions

Solution

{

} 1.Ke2-f1 Bb1-d3 2.c3-c2 Rc1-d1 # {
Let us note that the 8 possible promotions continue to observe at least one of the 4 white figures aiming at the black King.

} 1.c3-c2 Rc1-d1 2.c2-c1=Q ! Bb1-d3 # {
Note that on } 2.c2-c1=R ? {we have not } Bb1-d3 # {because of } 3.Ke2*d1! {

Reversal of the 2 white moves.}

2 - aidé 7,5# infra-fonctionaries

Sobrecases, G.
2008

white Kh6 Pe2 black Kg8 Ph5c3e3b2c2d2 Re4

h#7.5 infra-fonctionaries(2+8)

Solution

{

} 1...Kh6-g5 ! {(and not 1...Kg6 ?)} 2.d2-d1=Q Kg5-g6 3.Qd1-d3 e2*d3 4.c2-c1=S d3*e4 {

} 5.b2-b1=B e4-e5 6.Bb1-c2 e5-e6 7.Bc2-a4 e6-e7 8.Sc1-b3 {(pour empêcher 9...Fc2 ou Fd1)} e7-e8=R # ! {
(of course not} 8...e7-e8=Q + ? 9.Ba4*e8 !{ ).

AUW bicolore.}

3 - serial h#13 make & take

Make&Take before capturing, we play as the unit we wish to capture.
We respect not only its march, but its colour:
a black knight (or king) will play a white pawn move if he wants to capture it.

Sick, O.
2019

white Pb7b3c2 Kg3 black Sh8 Ka2

ser-h#13 Make&Take(4+2)

Solution

{

} 1.Sh8-f7 2.Sf7-d6 {
(2.Ne5 ? would check via f5 ou e4)
} 3.Sd6-c4 4.Sc4-b2 5.Ka2-a3 {(Which before was illegal because of b3-b2xa3.)
} 6.Ka3-a4 {(not in check because Pb3 must start with a king move)
} 7.Sb2-c4! {(return)} 8.Sc4-a5 ! {(the only route to b4, as you cannot go through d1, d3 or d5 which would check)
} 9.Sa5-c6 10.Sc6-b4 11.Ka4-a5 {(no more b3-b4xa5)
} 12.Ka5-b6 13.Sb4-c6 !! c2-c4 # {
The b5 square is controlled, not by Pc4, but by Pb3 via a4!
And Pb7 controls a7 & c7 (via b6).
Two false leads :
} 13.Sb4-a2 ? c2-c4 + 14.Sa2*c4! {
} 13.Sb4-a6 ? c2-c4 + 14.Sa6-c5!

4 - PG 6,5 make & take

Solution

5 - 2# extinction

Extinction the King is a unit like any other (so you can promote to King).
A side wins when it has made any variety of units disappear, so by checkmating either the King, Queen, last rook, last bishop, last knight, or last pawn.

Rosner, E & Gockel H
2017

white Kc8 Pd7f6c5g5e3h3f2 Ra1 Bd1 black Ka7 Pc6e6d5a4h4d3 Sf5 Rc4

#2 Extinction chess(10+9)

Solution

{

Tries :
} 1.d7-d8=B ? {(thematic try ; threatens} 2.Bd1-g4 # {dominating the bN ;
and} 2...Rc4*g4 {does not extinguish white Bishop species since it remains the Bd8
and therefore is illegal since} 3.h3*g4 {extinct black Rook species)
} 1...Rc4*c5 2.Ra1*a4 # { and not} 2.Bd1-g4 + ? Sf5-d6 ! {but black parry with} 1...d3-d2 ! 2.Bd1-g4 + d2-d1=S ! {
} 1.d7-d8=Q ? {(threatens} 2.Qd8-a5 # {and not } 2.Qd8-b6 + Ka7*b6 # ! {)
without Pd5, there would be } 2.Qd8*d3 # {extinguishing either of the black Rook or Knight species
. without the Pe6, } 2.Qd8-d7 {would mate, dominating the bN
} 1...Rc4*c5 2.Ra1*a4 # {or} 2.Bd1-g4 # {but} 1...Ka7-a6 ! {simply counter the threat

} 1.d7-d8=R ! {(threatens} 2.Ra1*a4 # {by double check.} 2...Rc4*a4 {does not extinguish the white Rook species since it remains the Rd8
and therefore is illegal since} 3.Bd1*a4 {extinct black Rook species.)
} 1...a4-a3 2.Ra1*a3 # {
} 1...Rc4*c5 2.Bd1-g4 # {

The threat in the try becomes variation mate (on 1...Rxc5) in the real game and vice versa

Two-coloured AUW between the tries and the solution}

6 - aidé 5# Chameleon Circe b) wKe1

Chameleon Circe A captured piece rises in rank before being reborn, according to the C-F-T-D pattern.
A captured Queen becomes a Knight and the cycle resumes.
Pawns are reborn as in normal Circe

Rice, J.
2017

white Sf4 Kg2 black Ke5 Pf5g4

h#5 Chameleon Circe(2+3)
b) g2 ---> e1

Solution

{

} a) {
} 1.Ke5-f6 Sf4-g6 2.Kf6*g6[+wBf1] Bf1-e2 3.Kg6-h6 Be2*g4[+bPg7] {
} 4.g7-g6 Kg2-h3 5.f5*g4[+wRh1] + Kh3*g4[+bPg7] # {

} b) wKg2-->e1 {Kg2 --> e1
} 1.Ke5-e4 Sf4-h3 2.g4*h3[+wBf1] Bf1-g2 + 3.h3*g2[+wRh1] Ke1-d2 {
} 4.g2*h1=B[+wQd1] Kd2-c3 5.Bh1-f3 Qd1-d4 #

7 - h#5# with Moose and Grasshopper

Grasshopper moves along the Queen's lines with a sautoir behind which it lands
. The landing square must be empty or occupied by an opponent's piece
Moose The Moose is a Grasshopper which is at a 45 degree angle to its supposed landing square
. When the sautoir is adjacent to it, it is a knight's step

Taylor, St
2018

white Mf1 Kh4 black Mf2 Gh2 Ke1

h#5(2+3)
f1, f2: Mooses
h2: Grasshopper

Solution

{

} 1.Ke1-e2 Kh4-g3 2.Mf2-h3 Mf1-h4 3.Ke2-f1 Mh4-g2 4.Gh2-f2 Mg2-h4 5.Mh3-e1 Kg3-h2 #

8 - 7# with set play köko

Köko At the end of a move, you must be in contact with another unit

Widlert, K.
2018

white Kd8 Rg4 Ph3 Ba1 black Bg8 Kh7 Pa6

#7 Köko(4+3)

Solution

{

Set play
} 1...Bg8-a2 2.Ba1-h8 Ba2-g8 3.Rg4-h4 # {
note that} 2.Rg4-h4 {fait pat

Real play
} 1.Rg4-g3 ! {(threatens} 2.Rg3-g4 Bg8-a2 3.Ba1-h8 Ba2-g8 4.Rg4-h4 # {)
} 1...Bg8-a2 2.Rg3-b3 Ba2-b1 3.Rb3-b7 Bb1-a2 4.Kd8-c8 Ba2-b1 {
} 5.Ba1-h8 + Kh7-g8 6.Rb7-d7 Bb1-h7 7.Rd7-d8 # {

}

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