py_20240625

1 - 2# with pao, vao & naos

Loustau, JM.
2023

white Be5 Rg4 Ke2 PAg1 WNf2 black VAb1 Pb2b5 Kh1 BNa3

#2(5+5)
🨵g1: Pao
🨷f2, 🨽a3: Nao
🨼b1: Vao

: chinese Rook move as a Rook but needs a hurdle to capture
: chinese Bishop move as a Bishop but needs a hurdle to capture
: move as a Nightrider but needs a hurdle to capture

Solution

{

Tries:
} 1.Ke2-f1 ? {(threatens} 2.Rg4-h4 # {but neither} 2.PAg1-e1 {illegal nor} 2.Pg1*b1 + BNa3-e1 {)
} 1...VAb1-f5 ! {
} 1.PAg1-e1 ? {(} 2.Ke2-f1 # {)
} 1...VAb1-c2 ! {activating Nao a3
} 1.PAg1-d1 ? {(threatens} 2.Ke2-e1 # {but not} 2.Ke2-f1 + BNa3-e1 ! {)
} 1...VAb1-c2 ? 2.Ke2-f1 # {
} 1...VAb1-d3 ! {
} 1.WNf2-d3 ? {(} 2.Ke2-f2 # {)
} 1...BNa3-c2 ! {

} 1.WNf2-b4 ! {(} 2.Ke2-d3 # {)
} 1...BNa3-c2 2.Ke2-f2 # {

Threat correction, author's speciality.}

2 - h#2,5 3 solutions neutral chinese pieces

Caillaud, M.
2021

neutral PAg1 NAa4 Pd2e2 Bd1 Rf3 Sg6 white Ka2 Pg5 black Kf7 Ba1g8 VAe8 Pe6e5f4

h#2.5(2+7+7)
🩁g1: neutral Pao
🩃a4: neutral Nao
🨅d2, e2: neutral Pawns
🨃d1: neutral Bishop
🨂f3: neutral Rook
🨄g6: neutral Knight
🨼e8: Vao

: normally move but with the help of a hurdle to capture
: can be moved by one side or the other

Solution

{

} 1...nRf3-b3 2.nPe2*d1=nNV nNVd1-c2 {(to immobilize other neutral Vao)} 3.nPd2-d1=nNV nNVd1*b3 # {

} 1...nRf3-h3 2.nPe2*d1=nNN nNNd1-f2 {(to immobilize other neutral Nao)} 3.nPd2-d1=nNN nNNd1*h3 # {

} 1...nRf3-f1 2.nPe2*d1=nNP nNPd1-e1 {(to immobilize other neutral Pao)} 3.nPd2-d1=nNP nNPd1*f1 # {

the first chinese promotion unit serves both as a hurdle and as a blocker for the other one.}

3 - 5# all-in chess

Ravishankar, SN.
1989

white Rg8 Ph7 Ka1 black Bb8d7 Rb7d6 Kh1

#5 échecs complets(3+5)

: you can play your units or the opponent's units, as long as you do not return immediately,
which would cancel a move made.

Solution

{

} 1.h7-h8=Q + ? {allows } 1...Qh8-b2 ! {or elsewhere

} 1.h7-h8=R + {
} 1...Rd6-h6 2.Rh6-e6 + ! Bb8-h2 3.Bh2-c7 + ! Re6-h6 4.Rh6-d6 + Bd7-h3 5.Bh3-e6 # {
} 1...Bd7-h3 2.Bh3-e6 + ! Rb7-h7 {(here, } 3.Rh8*h7+? Rh7-b7 ! {or elsewhere)
} 3.Rh7-c7 + ! Be6-h3 4.Bh3-d7 + Rd6-h6 5.Rh6-e6 #

4 - 10# half-in-chess

Tylor, Ch & Ravishankar SN
2024

white Kh8 Ph7h5g3c4 black Ke5

#10 half-in-chess(5+1)

half-in-chess : you can move only opponent's units

Solution

{

} 1.Ke5-f4 + g3-g4 2.Kf4-f5 + g4-g5 3.Kf5-g6 + h5-h6 4.Kg6-f7 ! c4-c5 {
} 5.Kf7-f6+ g5-g6 6.Kf6-f7 + g6-g7 7.Kf7-f8 + g7-g8=S ! 8.Kf8-e7 + Sg8-f6 {
} 9.Ke7-d6 + c5-c6 10.Kd6-d7 # {
Note that} 7...g7-g8=B ? 8.Kf8-f7 #

5 - helpmate 2# 2 sol mainly-in-chess

Tylor, Ch
2024

white Pc3d2 Kd8 black Re4 Kf3

h#2 mainly-in-chess(4+2)
2 solutions

mainly-in-chess you can play your units or opponent's one,
provided that the same unit is not played twice in a row.
To help you read the solution, the side playing will be indicated: (W)hite or (B)lack.

Solution

{

} 1.Re4-e3 {(B)(on} 1...d2*e3 ? {(W)} 2.Kf3-e4 {(B)} Ke4-d4 { {(W)}is illegal (twice in a row))
} 1...Kf3-e4 ! {(W)} 2.d2*e3 {(B)} Ke4-d4 # {(W)
Black King can'no't move again and pawns can't parry check.

} 1.Re4-d4 + {(B)} c3*d4 {(W)} 2.d2-d3 {(B)} Kf3-e4 # {(W)
: d3 pawn is blocked and black King can't move again}

6 - 2# annan

Gockel, H.
2015

white Pc7f3a4c6 Bg7g4 Qg6 Se3a6 Re2b2 Kh1 black Qa8 Rb8b3 Sc8b7 Ba7g8 Pf4a3a5 Kb6

#2 annan(12+11)

: a unit gets the walking way of the friendly unit ‘below’ it (to the south)

Solution

{

Set play :
} 1...Kb6-c4 2.Re2-c2 # {(A)
} 1...Kb6-d5 2.Re2-d2 # {(B)

real play :
} 1.Qg6-e4 ! {(Getting Knight's moving way and so threatening} 2.Qe4-c5 # {)
} 2...Kb6*a4 {impossible because Pc6 has acquired the Queen's march.
As well as} 2...Sb7*c5 {because Nb7 has acquired the Rook's march.
} 1...Rb3-b5 2.Se3*a3 # {
: Knight moves as a Rook then gives Pa4 its moving way. And not} 2.Qe4-c5 + ? Kb6*a4 ! {
} 1...Kb6-c4 2.Re2-d2 # {(B)(} 2.Re2-c2 + ? Kc4-d3 ! {)
: it is a simple check but the capture of the Knight would give again the Qe4 its normal walk.
} 1...Kb6-d5 2.Re2-c2 # {(A)(} 2.Re2-d2 + ? Kd5*c6 ! {)
} 1...Kb6*a4 2.Se3-c3 # {(Knight moves as a Rook and so double check).
} 1...f4*e3 {(give again the Queen its walk)} 2.Qe4-d4 # {

AB-BA between set play and real play}

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