py_20240528

1 - maximum selfmate 2# circe

Ostruh, B & Klasinc M
1976

white Rf1 Sb1 Bd1h4 Pd2 Qf6 Kc6 black Qf5 Kf4 Pd5e5c5b5b3c3c2g4 Rc1e1 Be3 Sf2

s#2 maximum Circe(7+14)

: Black is obliged to play the geometrically longest legal moves
: White plays, forcing Black to checkmate him
: a captured unit is reborn on its native square if it is free

Solution

{

} 1.Kc6*d5[+bPd7] ! {(threatens} 2.Qf6*e5[+bPe7] + 2...Qf5*e5 # {,
Bd1 must therefore be eliminated to obtain the escape square f3)
} 1...c2*d1=R 2.d2-d3 2...Rd1*d3[+wPd2] # {
} 1...c2*d1=B 2.d2*c3[+bPc7] 2...Bd1-f3 # {
} 1...c2*d1=S 2.d2*e3[+bBf8] + 2...Sd1*e3[+wPe2] # {
} 1...c2*d1=Q 2.d2-d4 2...Qd1*d4[+wPd2] # {

Albino (4 possible pawn moves) and AUW (the 4 promotions)}

2 - reflex 3#

Morice, J.
1973

white Pd5h5g3a3 Sf7e7 Rg7b1 Bf6 Kh4 Qg1 black Ba6 Ra4 Pb6g2f3e4 Kc5 Sf2e1d2

r#3(11+10)

: when a checkmate is presented, it must be played
Published in 1973, but corrected much later, so that the correct version can be found in the album... 1980-82 !

Solution

{

} 1.Rg7-g5 ? 1...Ra4-c4 ! 2.d5-d6 # ?!? {
} 1.Bf6-g5 ? 1...Ba6-c4 ! 2.Bg5-e3 # ?!? {
} 1.Sf7-g5 ? 1...Sd2-c4 ! 2.Sg5*e4 # ?!? {
} 1.Bf6-d4 + ? 1...Ra4*d4 ! {

} 1.Rb1-b3 ! {(threatens} 2.Rb3*f3 2...Sd2*f3 # 2...Se1*f3 # {)
} 1...e4-e3 + 2.Rg7-g4 2...Ra4*g4 # {
} 1...Se1-d3 2.Rg7-g5 {(threatens} 3.Qg1-h1 3...g2*h1=Q # {or} 3...g2*h1=R # {)
} 2...e4-e3 + 3.Rg5-g4 3...Ra4*g4 # {
} 1...Sd2*b3 2.Bf6-g5 {(threatens} 3.Qg1*g2 3...Se1*g2 # {or} 3.Qg1-h1 3...g2*h1=Q # 3...g2*h1=R # {)
} 2...e4-e3 + 3.g3-g4 3...Ra4*g4 # {
} 1...Ba6-d3 2.Sf7-g5 {(threatens} 3.Qg1*g2 3...Se1*g2 # {)
} 3.Sg5*f3 3...Sd2*f3 # 3...Se1*f3 # {
} 2...Se1-c2 3.Sg5*f3 3...Sd2*f3 # {
}

3 - 2# with leos and rose

Cheylan, Y.
1988

white WLg8 Bg7c6 Ke7 Pb7g4h5h4f2 ROd1 black BLh8 Ph7h6h3c7e3b2 Kf4

#2(11+11)
🨴g8, 🨺h8: Léo
󼎜d1: Rose

: moves on Queen's lines but needs a sautoir to capture
: Extended Knight moving in a rounding movement

Solution

{

Set play :
} 1...b2-b1=Q 2.WLg8-b8 # {

real play :
} 1.WLg8-c4 ! {(threatens} 2.Bg7-d4 # {)
Promotions on b1 prepare an interception on the 4th rank but have the disadvantage to open the line for the Rose d1,
which now guards g4 via b2-a4-b6-d7-f6.
} 1...b2-b1=Q 2.WLc4-f1 # {
} 1...b2-b1=B 2.WLc4-f1 # 2.b7-b8=WL # {
} 1...b2-b1=BL 2.b7-b8=WL # {
} 1...b2-b1=RO 2.b7-b8=RO # {
} 1...e3*f2 2.b7-b8=WL # {
} 1...Kf4*g4 2.Bc6-e4 # {

A kind of half-Babson.}

4 - h#1 2 solutions anti-circe b) superguards

Rotenberg, J.
2024

white Kf7 Rg1 black Re8 Be7a1 Pe6h6 Kh7

h#1 anti-circe 2sol.(2+6)
b) Superguards 2sol.

: capturing unit is reborn on its native square if free
: a unit supported by a unit of its side is safe, including Kings

Solution

{

} a) {anti-circe
} 1.e6-e5 Kf7-g7 # {
} 1.Be7-f8 Kf7-g8 # {

} b) {superguards
} 1.e6-e5 Kf7-g8 # {
} 1.Be7-f8 Kf7-g7 # {
}

5 - h#2 b) superguards

Rittirsch, M.
2024

white Rd5 Pf7 Bf1 Ke1 black Pg2 Sg4 Kh4

h#2(4+2)
b) Superguards

Solution

{

} a) {
} 1.g2-g1=R f7-f8=S 2.Rg1-g3 Sf8-g6 # {

} b) {Superguards
} 1.g2-g1=B f7-f8=Q 2.Bg1-a7 Qf8-f2 #

6 - h#2,5 superguards b) antiguards

Balasubramanian, SK & Crisan V
2024

white Pg6 Sg5 Kh4 black Bf6 Kg7 Ph2

h#2.5 superguards(3+3)
b) anti-guards

anti-guards : a unit can only be captured if it is "observed" by a friendly unit

Solution

{

} a) {superguards
} 1...Kh4-g4 2.Kg7-h6 Sg5-e6 3.Bf6-h4 Kg4-g5 # {

} b) {anti-guards
} 1...Sg5-h7 2.Kg7-h8 g6-g7 {(does not check, black King is no longer "observed" by Bf6 !!)
} 3.Bf6-a1 {(only square from which you cannot escape the diagonal)} g7-g8=R # {
Note that} 3...g7-g8=Q + ? {we have} 4.Kh8*h7 !

7 - 2# with neutral locust

Goodare, KJ.
1952

neutral Lh2 white Rc1e8 Ke3 Bd6 Sc8 Pa6h5g3e2 black Kd5 Pa7b6f6

#2(9+3+1)
🨖h2: neutral Locust

: kind of Grasshopper that swallows its jumper, which is therefore necessarily an enemy unit

Solution

{

Set play :
} 1...nLh2*g3-f4 + 2.nLf4*f6-f7 # {
} 1...nLh2*e2-d2 + 2.Bd6-f4 # {
} 1...nLh2*h5-h6 + 2.nLh6*f6-e6 # {
} 1...b6-b5 2.Rc1-c5 # {
} 1...f6-f5 2.Re8-e5 # {

Tries :
} 1.Re8-e4 ? 1...nLh2*h5-h6 + ! 2.nLh6*f6-e6 + nLe6*d6-c6 ! {because Re4 prevents this move from checking
} 1.Rc1-c2 ? 1...nLh2*e2-d2 + ! 2.Bd6-f4 + nLd2*c2-b2 ! {
} 1.Rc1-c3 ? 1...nLh2*e2-d2 + ! 2.Bd6-f4 + nLd2*c3-b4 ! {
} 1.Re8-e7 ? 1...nLh2*h5-h6 + ! 2.nLh6*f6-e6 + nLe6*d6-e8 ! {or
} 1...nLh2*g3-f4 + ! 2.nLf4*f6-f7 + nLf7*e7-d7 ! {
} 1.Bd6-b8 ? 1...b6-b5 ! {

} 1.Rc1-c7 ! {
} 1...b6-b5 2.Rc7-c5 # {
} 1...f6-f5 2.Re8-e5 # {
} 1...nLh2*h5-h6 + 2.nLh6*f6-e6 # {cause} 2...nLe6*d6-c6 {does not avoid check
} 1...nLh2*g3-f4 + 2.nLf4*f6-f7 # {car} 2...nLf7*c7-b7 {does not avoid check
} 1...nLh2*e2-d2 + 2.Bd6-f4 # {
}

8 - serial h#10 3 solutions with eagles

Kotesovec, V.
2017

white WAd2 black BAe3a3f7g7 Rg4 Kd3

ser-h#10 3 sol.(1+6)
🨴d2, 🨺e3, a3, f7, g7: Eagle

: like a Grasshopper, but at a 90° angle to the jumper

Solution

{

} 1.Kd3-e4 2.BAa3-e2 {(jumper e3)} 3.BAe3-f4 {(e4)} 4.Ke4-f5 5.Kf5-g5 {
} 6.BAg7-h5 7.Kg5-h6 8.Rg4-g7 9.BAe2-g6 {(h5)} 10.BAf7-h7 {(g6)} WAd2-e5 # ! {
Eagle e5 make double check via h5 and g7 ;
It controls g5 via f4.
And not} 10...WAd2-g3 + ? {Eg6 plays !.

} 1.BAa3-d4 {(d3)} 2.Kd3-e2 3.Ke2-f1 4.BAf7-g1 5.Kf1-g2 {
} 6.Kg2-h1 7.Rg4-g2 {(and not immediately Ee3-h2, which would be a self-check)
} 8.BAe3-h2 {(g1)} 9.BAg7-f2 10.BAd4-g3 WAd2-f1 # ! {
Rg2, being the jumper, must be well enclosed.
} 1.Rg4-b4 2.Kd3-c4 3.BAe3-a4 {(a3)} 4.BAa3-c3 {(b4)} 5.Rb4-b6 {
} 6.BAg7-b4 7.BAb4-a6 8.BAf7-b5 9.Kc4-b4 10.Kb4-a5 WAd2-d4 # ! {
Eagle d4 checks via a4 et b6 ; it control b4 via c3 ;

Two echo mates and a very different 3rd one.}

9 - serial h#8 3 solutions with mooses

Kotesovec, V.
2017

white WMb2 black BMb1d8e6f3 Kd4

ser-h#8 3sol.(1+5)
🨊b2, 🨐b1, d8, e6, f3: Moose

: Like a Grasshopper, but with a 45° angle to the jumper.

Solution

{

} 1.Kd4-d3 2.BMd8-e2 3.BMf3-d2 4.BMd2-f1 {
} 5.Kd3-d2 6.Kd2-e1 7.BMb1-f2 8.BMe6-d1 WMb2-f3 # ! { Mate by double check.

} 1.BMd8-e3 2.Kd4-c3 3.BMf3-d4 4.BMd4-c2 {
} 5.Kc3-d2 6.Kd2-c1 7.BMe6-d2 8.BMe3-d1 WMb2-d3 # ! {

} 1.Kd4-e3 2.BMe6-f2 3.Ke3-e2 4.BMf3-d2 {
} 5.Ke2-f1 6.BMb1-g2 7.BMd8-e1 8.BMd2-g1 WMb2-g3 # ! {

Triple echo.}

10 - h#3 2 solutions with naos et pao

Sizonenko, V.
2022

white Sd6 NAf2g4 PAd4 Kg6 black Kc7

h#3 2sol.(5+1)
🨷f2, g4: Nao
🨵d4: Pao

: Extended Knight who needs a jumper to capture
: Rook that needs a jumper to capture

Solution

{

} 1.Kc7-b6 NAg4-h2 2.Kb6-a5 NAf2-h6 3.Ka5-a4 Sd6-c4 # {

} 1.Kc7*d6 PAd4-f4 2.Kd6-e7 NAf2-e4 3.Ke7-f8 Kg6-f6 # {

Exchange of functions between the Naos and the figure serving as the Pao's jumper, on the subject of guarding the squares.}

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