py_20190416

1 - self helpmate 3# 2 solutions with neutral pao and vao

Parrinello, M.
2014

neutral VAe6 PAg6 black Qe4 Pg7f5e5c6c5 Ke3 Bf4 white Sf6 Kd1

hs#2(2+8+2)
🩁g6: neutral Pao
🩂e6: neutral Vao
2 solutions

: white palys and black collaborate until the last move
Where white forces black to checkmate him in 1 move
. : rook needing a sautoir to capture
: Bishop needing a sautoir to capture

Solution

{

} 1.nPAg6-g2 nPAg2-d2 2.nPAd2-d6 Ke3-d4 + 3.Sf6-d5 + Kd4*d5 # {

} 1.nVAe6-c4 nVAc4-e2 2.nVAe2-h5 Ke3-f3 + 3.Sf6-g4 + Kf3*g4 # {

"Every solution is like a beautiful dance.
A charming problem, one to be remembered" (J. Vysotska).}

2 - 2# circe madrasi

(Correction of an old problem in collaboration with N. Macleod)

Cheylan, Y.
2004

white Bb8e8 Ka8 Qf6 Pg2 Sh8e4f2 Re1h5 black Qe5 Sc6 Rc8 Kf4 Bh3

#2 circé madrasi(10+5)

: a captured piece is reborn on its native square if it is free, otherwise it disappears
. : 2 opposing pieces of the same kind that observe each other are paralysed

Solution

{

Try :
} 1.Sh8-g6 + ? Sc6-e7 ! {paralyses wN.

} 1.Be8-d7 ! {threatening} 2.Sf2*h3 # {(and not} 2.Rh5-h4 + ? Rc8*h8[+wSg1] ! {nor } 2.Sf2-d3 + ? Sc6-b4 ! {)
} 1...Rc8-e8 {(or} 1...Rc8-f8 {or} 1...Rc8-g8 {, crossing the critical square d8)} 2.Bb8*e5[+bQd8] # {(et non } 2.Sf2*h3[+bBc8] + ? Kf4-g4 ! {)
}} 1...Rc8-d8 2.Rh5*e5 # { (no rebirth)
} 1...Rc8-c7 2.Rh5-h4 # { (bR no longer has access to the "h" column)
} 1...Rc8*h8[+wSg1] 2.g2-g3 # {(and not} 2.Sg1*h3[+bBc8] {display-departure-file} Kf4-f5 ! { : this square is free, although apparently controlled 3 times.)

note that} 1...Rc8*b8[+wBc1] {is illegal}

3 - h#1 breton

Tritten, P.
2018

white Kf1 Pg2g3 Sh5 Rh8 Bh3 black Qh2 Ph7 Sh4 Bh6 Kh1

h#1 breton chess(6+5)
b) exchange of ♞ & ♝

breton : In Breton, after each capture, a unit of the same nature must disappear
(if possible) from the capturing side.

Solution

{

} a) {
} 1.Sh4*g2[-h7] Bh3*g2[-h5] # {(the Queen cannot capture g2 because Bh6 would disappear)

} b) bBh4<-->bSh6 {exchange of bN & bB
} 1.Bh4*g3[-h7] 2.Sh5*g3[-h3] # {(the Queen cannot capture g3 as the Nh6 would disappear)

A line clearance that even Valentin Marin would not have dared to dream of.}

4 - h#2 2 solutions breton

Tritten, P.
2018

white Pd2 Kf8 Ra7 Se5 Bg4 black Bf4 Ke4 Qb5 Pd4 Sd5f2 Re7c6

h#2 breton chess(5+8)
2 solutions

Solution

{

} 1.Re7*e5[-d5] Ra7-f7 2.Sf2-d3 Bg4-f3 # {
(3.Kxf3 is impossible because the Bf4 would disappear. In illustration : } 3.Ke4*f3[-f4] {)

} 1.Sd5-e3 Ra7-d7 2.Qb5*e5[-f2] d2-d3 # {(3.Kxd3 is impossible because the Pd4 would disappear. In illustration : } 3.Ke4*d3[-d4] {)}

5 - #2 extinction chess

Rosner, E & Gockel H
2017

white Qd1 Pd6b2e3 Kd8 Bb4 Sf7c1 black Bc4 Ka6 Qh1 Pe7a7b5a4b3e4d3h5 Sb6f1 Rd5

#2 extinction chess(8+14)

: the King is a unit like any other.
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 the last pawn.

Solution

{

Essais :
} 1.Sc1-e2 ? {threatening} 2.Qd1-c1 # {the "Black Bishop" species will become extinct
et sur)} 1...Rd5-f5 {there is a checkmate by } 2.Se2-g3 # {but } 1...d3-d2 ! {prevents the threat
} 1.Sc1*b3 ? {threatening} 2.Sb3-c5 # {the species "Black King" or "Black Rook" will become extinct; but not } 2.Qd1-c1 + Bc4*b3 !{
} 1...a4*b3 2.Qd1-c1 # {
} 1...Ka6-b7 2.Sb3-a5 # {( the species "Black King" or "Black Bishop" will become extinct)
} 1...e7*d6 2.Sf7*d6 # {(attacks Bc4 and } 2...Rd5*d6 {is illegal)} 1...Sb6-d7 2.Kd8*d7 # {or} 1...Sb6-c8 2.Kd8*c8 # {because the species "Black Knight" or "Black Queen" will become extinct
mais} 1...Sb6-a8 ! {puts the Knight on a safe square

} 1.Sc1*d3 ! {threatening} 2.Sf7-e5 # {display-departure-file} {
} 1...e4*d3 2.Qd1-c1 # {
} 1...Rd5-f5 2.Sd3-c5 # {
} 1...e7*d6 2.Sf7*d6 # {

"Tertiary threat correction"}

6 - 2# lortap

Gockel, H.
2018

white Ba3 Ka7 Qb5 Pc6e6g6g4 Sh3c4 Rc7f1 black Qf4 Pb6e5e4d4 Sb7h7 Kf6

#2 lortap(11+8)

: In Lortap (or Elliuortap or Anti-Patrol), a unit may only capture if
it is NOT observed by a friendly unit

Solution

{

It should be noted that } 1.Sc4*e5 {et} 1.Sc4*b6 {are illegal as Nc4 is observed by Qb5

Tries :
} 1.Sc4-b2 ? {or} 1.Sc4-a5 ? {threatening} 2.Qb5*e5 # {but} 1...Sb7-c5 ! {
} 1.Sc4-d2 ? {threatening} 2.Sd2*e4 # {, bQ being observed by Pe5, but not} 2.Qb5*e5 + ? Qf4*e5 ! {, Rf1 being observed by Nd2
} 1...Qf4-f3 2.Qb5*e5 # {but} 1...Sb7-d6 ! {
} 1.Sc4-e3 ? {does not threaten anything as } 2.Se3-d5 {does not even check
} 1.Qb5*e5 {threatening} 2.Sc4-b2 # {but } 1...Kf6-e7 {or} 1...Kf6-g7 {wR being observed, but not} 1...Sb7-c5 ? 2.Sc4-d6 # {

} 1.Sc4-d6 ! {("Tertiary threat correction" which is} 2.Sd6-e8 # {. note than } 2.Sd6*e4 {and} 2.Qb5*e5 {are illegal )
} 1...Sb7*d6 2.Qb5*e5 # {
} 1...Sb7-c5 2.Sd6*e4 # {(but not } } 2.Sd6-e8 ? Kf6-e7 {wR being "observed" by the Ne8
}

7 - h=2 4 solutions super-circe with rose and locust

Soulivy, K.
2014

neutral Lh1 black Sb7 Kd3 white ROf7

=2 super-circe(1+2+1)
4 solutions
󼎜f7: Rose
🨖h1: neutral Locust

: a captured piece is placed back on the board at capturing side's pleasure
. : Extended knight moving in a curved fashion
. : Grasshopper "swallowing" its sautoir

Solution

{

} 1.Sb7-d8 ROf7*d8[+bSg2] 2.Kd3-e3 nLh1*g2-f3[+bSd3] {=It is well stalemate : Nd3 cannot play without activating the neutral Locust f3, which cannot run away. The Rose d8 protects this Locust (via f7-g5) and controls d2 (via b7-a5-b3) and d4. The other escape squares are forbidden by the Locust.

} 1.Kd3-c3 nLh1*b7-a8[+bSa6] 2.Kc3-b4 nLa8*a6-a5[+bSc3] {= it is well stalemate : Nc3 cannot play without activating the neutral Locust a5, which cannot escape; the Rose f7 protects the said Locust (via d8-b7) and controls b3 (via g5-f3-d2) and c4

} 1.Kd3-e3 nLh1*b7-a8[+bSe4] 2.Ke3-f4 nLa8*e4-f3[+bSf5] {=
} 1.Kd3-d4 ROf7*b7[+bSf3] 2.Kd4-d5 nLh1*f3-e4[+bSc6] {=

Double stalemate tableau with ortho-diago echo !}

8 - h#2,5 2 solutions Mars circe with neutral Queen and Rook

Smits, G.
2014

neutral Qd8 Rg8 black Kh5 Rh3 Be2

h#2.5 Mars circe(0+3+2)
2 solutions
🨁d8: neutral Queen
🨂g8: neutral Rook

: to capture the pieces virtually pass through their native square

. : The Qd8 & Rg8 are "neutral". As repeatedly explained, the term "neutral", though commonly used,
is inadequate. These pieces do not refuse to engage, they flip-flop, like vulgar politicians: they are white,
then black, then white, etc. They should rather be called "weathervanes" or "traitors".

Solution

{

} 1...nRg8-g4 {(unpinning bB.)} 2.Be2-d3 {(There is now a nQ/nR battery.)} nQd8-g5 {(no check)} 3.Bd3-g6 nRg4*h3 # {
(If a neutral piece runs away, the check is not parried, as it is double (from d1 & h1).}

} 1...nQd8-h4 {(unpinning bR)} 2.Rh3-g3 {(there is now a nR/nQ battery)} nRg8-g6 3.Rg3-g5 nQh4*e2 #

9 - serial h=13 anti-circe

Ersek, T.
2016

white Bh5a1 Ke1 Qc8 Pe4b2 Sa8 Rb1 black Sf2 Pd7h6 Ke6 Rg7 Bf3

ser-h#13 anti-circe(8+6)

: capturing unit is reborn on it's native square

Solution

{

} 1.Sf2-d1 2.Sd1*b2-b8 3.Sb8-a6 4.Sa6-c7 {
} 5.Sc7*a8-g8 6.Sg8-e7 7.Se7-g6 {
} 8.Sg6-h8 ! 9.Rg7-g6 10.Ke6-f7 11.d7-d5 12.d5*e4-e7 {
} 13.Bf3-a8 Rb1-b7 {stalemate !.}

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