py_20170214

1 - h=2 with Moose-Locust

Roméo Bédoni
1990

white Ph7 Ke8 black Pe2 Kc8 EAb7

h=2(2+3)
🨺b7: Moose-Locust

Careful, it's a on b7. The Moose deflects 45 degrees as it passes the sautoir.
. In addition, since it is also a Locust, it swallows the sautoir as it passes

Solution

{

Set Play :
} 1...h7-h8=Q 2.e2-e1=EA Qh8-h2 {stalemate !

Real play :
} 1.e2-e1=B h7-h8=WE 2.Be1-h4 WEh8*h4 [wWEh4->g3] {
The Moose-Locust reaches g3 after having swallowed the h4 sautoir.
Impossible is} 3.Kc8-b8 {because of } WEg3*b8 [wWEb8->a8] {or } 3.Kc8-c7 WEg3*c7 [wEAc7->c8] {

Two promotion changes.}

2 - h=4 rogue chess

Roméo BEDONI
1990

white Pf6a5 Ke1 black Pa3b2c2a6 Ka4 Bb5

h=4 rogue chess(3+6)

A rogue piece after capture, lands on one of the neighbouring squares.
A Na1, with an opposing unit on b3, can either play normally on c2, capture b3 by landing on one of the squares a2, a3, a4, b4, c4, c3, c2 or b2.
In rogue chess, all pieces are rogue.

Solution

{

} 1.c2-c1=S f6-f7 2.b2-b1=R f7-f8=S 3.Rb1-b4 Sf8-d7 4.Sc1-b3 Sd7-b6 ! {
Stalemate. The Knight does not check the smothered King since it could not fall back.
But every black unit contiguous to the said King is ipso facto pinned.
And} 5.Ka4*a5 [wKa5->a4] {is illegal as now} Sb6*a4 [wSa4->a5] {is allowed.}

3 - h#1,5 Magnetic chess

I.RICHARDSON
2000

white Kc3 Bc4 Se5 black Pb6d6 Kc5

h#1,5 Magnetic chess(3+3)
b) Fc4-->c2

In Magnetic chess, friendly pieces are pushed back (as far as possible) and enemy pieces are drawn (as close as possible) along the the horizontal or vertical line connecting them to the unit that has just played. But Kings are not affected.
Solution

{

} a) {
} 1.Se5-d7+ ! d6-d5 [wSd7->d6] 2.Sd6-e4[wSc4->a4]#! {
} 2...d5*e4 [wBa4->d4] {is impossible, because Ba4 would be on d4! And } 2...d5-d4 {does not parry the mat, since the Ce4 is already "attracted". !

} b) wBc4-->c2 {Fc4-->c2
} 1.Se5-c4 ! b6-b5 2.Bc2-e4[wSc4->a4] #! {
again, } 2...b5*a4 [wBe4->b4] {is impossible, because Be4 is now on b4;
and similarly, } 2...b5-b4 {does not parry the mate, as the Na4 is already "attracted"!

The locations of the white figures are swapped from one mate board to another.}

4 - #2 magnetic chess

C.LYTTON
1999

white Pc2b3a4f3g5 Sd5e4 Bf7c7 Kc8 Ra8 black Pd2c4a6g6 Kc6 Ba2 Sh7

#2 magnetic chess(11+7)

Solution

{

tries :} 1.Sd5-b4 [wPb3->b1] + ? Ba2*b1 [wSb4->b2] ! {
the move } 1.Ra8*a6 [wPa4->a3] + ? {does not mat } Kc6-b5 {
} 1.Sd5-e7 [wBc7->a7][wBf7->g7][wSe4->e1] + ? {neither } Kc6-d6 ! {

} 1.b3-b4 ! {Blocus.
} {Pas } 1...a6-a5 [wRa8->a6] {which would be illegal.
} {
} 1...Sh7-f6 [wPf3->f5][bPg6->h6] 2.Se4-c5 [wSd5->e5]# { et pas } 2.Bc7-a5 [wSd5->e5][wPa4->a3] + ? Kc6-b5 ! {
} 1...Sh7*g5 [wSd5->f5] 2.Se4*g5 [wSf5->a5]# {
} 1...c4-c3 [wPf3->d3] 2.Bc7-d8 [wSd5->d4]# {
} 1...Ba2-b3 [wPf3->c3] 2.c2*b3 [wPb4->b8][+wSb8]# {
} 1...Ba2-b1 [wPb4->b2] 2.Sd5-b4# {
} 1...d2-d1=Q [wSd5->d2] 2.Sd2-b3 [wPb4->b8][+wSb8]# {note that } Ba2*b3 [wSb8->b4] {would be illegal because taking back the b8 Knight on b4} {
} 1...Sh7-f8 2.Se4*d2 [wSd5->d8][wPc2->b2]# { This was not a threat because 2...Nf8 (Nd8-e8).}

5 - #6 vertical mirror Circe

Th.ZIRKWITZ
1994

white Pc4d2b3 Sc3 Bb2 Ka6 Rf8 black Pe6d6c5e5h4e2d3 Kd4 Rh2 Sd8 Bb8

#6 vertical mirror Circe(7+11)

: A rook that would be reborn on h8 in normal circe is reborn on a8 in vertical mirror circe.

Solution

{

tries :
} 1.Sc3-d1 + ? Kd4-e4 2.Sd1-f2 + Rh2*f2 [+wSb1] 3.Sb1-c3 + Ke4-d4 4.Sc3-d1 + Kd4-e4 {et ici } 5.Sd1*f2 [+bRa8] {est illégal
} 1.Sc3*e2[+bPd7] + ? Kd4-e4 2.Se2-g3 + h4*g3 [+wSb1] 3.Sb1-c3 + Ke4-d4 4.Sc3-e2 + Kd4-e4 {et ici } 5.Se2*g3 [+bPb7] {est illégal
} 1.Sc3-a4 + ? Kd4-e4 2.Sa4*c5 [+bPf7] d6*c5 [+wSb1] 3.Sb1-c3 + Ke4-f5 {

} 1.Rf8-f6 ! {
} 1...Bb8-a7 2.Sc3-d1 + Kd4-e4 3.Sd1-f2 + Rh2*f2[+wSb1] 4.Sb1-c3 + Ke4-d4 5.Sc3-d1 + Kd4-e4 6.Sd1*f2[+bRa8]# {Considering the a7 screen
} 1...Sd8-b7 2.Sc3*e2[+bPd7] + Kd4-e4 3.Se2-g3 + h4*g3[+wSb1] 4.Sb1-c3 + Ke4-d4 5.Sc3-e2 + Kd4-e4 6.Se2*g3 # {because Pg3 is not reborn on b7
} 1...e2-e1=Q 2.Sc3-a4 + Kd4-e4 3.Sa4*c5[+bPf7] + d6*c5[+wSb1] 4.Sb1-c3 + Ke4-d4 5.Sc3-a4 + Kd4-e4 6.Sa4*c5 # {No rebirth, Pf7 already being there. Popandopoulo theme.}

6 - #4 Patrol

M.KERHUEL
2016

white Kb6 Bg3 Sf5 black Pb7a3 Ka8 Sd7

#4 Patrol(3+4)

to capture, a piece must be observed ("patrolled") by a piece of its side

Solution

{

} 1.Bg3-c7 ? {threatens} 2.Sf5-d6 {threatens} 3.Kb6*b7 # {
but} 1...a3-a2 ! 2.Sf5-d6 a2-a1=Q {et} 3.Kb6*b7 {is illegal because of} Ka8*b7 {

} 1.Bg3-b8 ! {threatens} 2.Kb6-a7 # {
} 1...Ka8-a7 2.Bb8-c7 + Ka7-a8 3.Sf5-d6 {followed by } 4.Kb6*b7 #

7 - h#3,5

G.FOSTER
2016

white Kf5 Sc6a3 black Sg2 Re4 Kd5

h#3,5(3+3)
b) each Knight becomes a Mao

Solution

{

} a) 1...Sc6-e5 2.Kd5-c5 Kf5-e6 3.Kc5-d4 Ke6-d6 4.Sg2-e3 Sa3-b5 #{With Maos, would be possible 4...Kd3!.

} b) +wMAc6 +wMAa3 +bMAg2{Knights --> Maos

} 1...MAa3-c4 2.MAg2-e3 {(doesn't check)} MAc4-a5 3.MAe3-c4 MAa5-b7 4.Re4-d4 MAc6-e7 #

8 - h#3,5 Functionaries chess

Th.PANTALACCI
2016

white Pf7 Sf5 Kg3 black Qb3 Pf6g4f3c2d5 Sh4 Rc8 Ke1

h#3,5 Functionaries(3+9)
2 solutions

a piece can only move, and a fortiori capture, if it is observed by an enemy piece

Solution

{

} 1...Sf5-d4 2.Qb3-b7 f7-f8=R 3.c2-c1=Q Rf8*c8 4.Qc1-d2 Rc8-c1 #{

} 1...Sf5-e3 2.d5-d4 f7-f8=B 3.c2-c1=S Bf8-a3 4.Sc1-e2 {(no check)} Ba3-b4 # {
AUW.}

9 - #3 horizontal cylinder

G.LATZEL
1935

white Pe2g6e6e5 Kd5 Rc1g4 black Pe3g7e7 Ke8 Rh8

#3(7+5)

to summarise, row 9 is equal to row 1

Solution

{

The specification "null moves allowed" is unnecessary. On the contrary, if they were forbidden, as in Rehm 1983, it would have to be said.
But everyone kneel before Popeye, idol of the 21st century, who forbids null moves, and thus changes the "natural law".
To understand the Horizon Cylinder, at least on a wooden chessboard, one can mentally place the Tc1 on c9!
tries :} 1.Rc1-c8 + ? Ke8-e1 {or} 1...Ke8-d1 {or} 1...Ke8-f1 {
} 1.Rg4-c4 ? 0-0 ! {: g8 is no longer controlled

} 1.Rc1-c1 {("null" move) ; blocus
} 1...Rh8-h8 {(a non-"null" move since it changes the position data, even if it keeps the picture)
} 2.Rg4-c4 {and} 3.Rc4-c8# {now that castling is impossible, as the Black Rook has moved.
} 1...Ke8-d8 2.Rg4-c4 {etc...}

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