py_20250603

1 - 2# with piece-lion and quintessence-lion

Quah, J.
2023

white RLf6 qnh2c2 Sd7e7 Kd8 LIh4 BLa3b1 black Bc3 Sg1 Kd6 Pc6d4 RLh3

#2(9+6)
🨍h2, c2: Quintessence Lion
🨵h4: Lion
🨶a3, b1: Bishop-Lion
🨵f6, 🨻h3: Rook-Lion

: piece needing a sautoir to move
: Nightrider forking 90 degrees with each move, while moving away.
For example, a Quintessence a1 can play b3, d2, e4, g3 & h5, but not c5 or f1.
A Quintessence Lion needs a sautoir.

Solution

{

} 1.BLb1-e4? {(threatens} 2.QNc2-g5 # {via sautoir d4 & f3)
} 1...Sg1-f3 ? 2.QNh2-e6 # {via sautoir f3 & g5.
} 1...d4-d3 ? 2.LIh4-b4 # {now that Pd3 intercepts RLh3.
but} 1...Bc3-d2! {

} 1.QNc2-g5 ! {(threatens} 2.QNh2-e6 # {: "covered" by RLf6)
} 1...Sg1-f3 2.Lh4-b4 # {: "covered" by BLa3, now that Nf3 intercepts RLh3.} 2...c6-c5 illegal, activating Lion b4.
} 1...d4-d3 2.BLb1-e4 # {: "covered" by QLg5.

Djurasevic theme: ABCD-BCDA (key-threat-variant 1- variant 2).}

2 - serial h=7 danger circe

Dupin, J.
2024

white Kc3 Re5 black Ka2 Pa3g5 Bh4

ser-h=7 danger(2+4)

: a piece threatened (including the King) in the orthodox way can play on its circe rebirth square.
If it is occupied by an opposing unit, the occupant is pulverised.

Solution

{

} 1.g5-g7 ! {(pawn is threatened by Rook)} 2.Bh4-f6 3.g7-g5 ! {
} 4.Bf6-h8 5.g5-g7 ! 6.Ka2-a1 7.a3-a2 Kc3-c2 {Stalemate :
a move by g7 pawn would threaten the Rook, which would return to a1 to destroy Black King.}

3 - h#2,5 2 solutions danger circe

Dupin, J & Caillaud M
2024

white Kd8 Pc7b7 black Bh3h2 Qg2 Kg1 Pf2f3e2 Rf1

h#2.5 2sol. danger(3+8)

Solution

{

} 1...c7-c8=S 2.Qg2-h1 Sc8-a7 ! 3.Bh3-g2 b7-b8=S # ! {
(} 4.Bh2*b8 {Does not parry the threat, Na7 returning to g1, destroying Black King.} Sa7*g1 {)

} 1...b7-b8=R 2.Kg1-h1 Rb8-b7 ! 3.Rf1-g1 c7-c8=R # ! {
(} 4.Bh3*c8 {does not parry the threat, as Rb7 returns to h1, destroying Black King} Rb7*h1 {)}

4 - h#2,5 2 solutions unicaptures

Gilbert, A.
2021

white Be5 Re7 black Kd5 Bc4 Re4

h#2.5 2sol. unicapture(2+3)

: A unit is only capturable if it is observed by at least 2 opposing units.
In Unicapture, the opposite is true: a unit cannot be captured if it is threatened more than once.

Solution

{

} 1...Re7-d7 + 2.Kd5-c5 Rd7-d3 3.Kc5-d4 Be5-d6 # ! {

} 1...Be5-d4 2.Kd5-e5 Re7-e6 3.Bc4-d5 Re6-f6 # !

5 - h#2 3 solutions b) breton adverse

Gockel, H.
2020

white Pb4c4d3 Bb2b1 Rf1 Sg2 Ke7 black Ba4c7 Pb3g3 Kd2 Re2a7 Qh1 Sh5e6

h#2 3sol.(8+10)
b) breton adverse

: When you capture a unit, you remove a second unit of the same type from the same side (if any).

Solution

{

} a) {
} 1.Ba4-b5 Sg2-e3 2.Bb5*c4 Se3*c4 # {(Illegal in Breton adverse because Bc7 disappears and so it's a self-check.)
} 1.Ra7-b7 Bb2-a3 2.Rb7*b4 Ba3*b4 # {(does not go in Breton adverse because Re2 disappears and so 3...Ke2)
} 1.Sh5-f4 Rf1-f3 2.Sf4*d3 Rf3*d3 # {(illegal in Breton adverse because Ne6 disappears and so it's a self-check)

} b) {Breton Adverse
} 1.Ba4-b5 Bb2-a3 2.Bb5*c4[-b4] Ba3-b4 # {
} 1.Ra7-b7 Rf1-f3 2.Rb7*b4[-d3] Rf3-d3 # {
} 1.Sh5-f4 Sg2-e3 2.Sf4*d3[-c4] Se3-c4 # {

AB-BC-CA cycle.
In each of Breton adverse's solutions, only one type of figure is played.}

6 - h#2 2 solutions andernach anti-circe couscous

G. Evseev, B. Shorokhov & D. Turevsky
2021

white Ka1 Qb2 Pd3c4d5a6h6 Re2 black Qd6 Pd7f5f4b4 Rf6 Ke5 Sd4 Be3

h#2 2sol.(8+9)
Andernach Anti-circe couscous

: a capturing unit changes colour.
: a capturing unit is moved to the original square of the captured unit.

Solution

{

} 1.Qd6*a6[-a6][+wQa2] Qb2*d4[-d4][+bQb8] 2.Qb8-d6 Qa2-b2 # {
starting position with Nd4 and, incidentally, Pa6 less.
The two Queens return to their starting squares, but it is not the same Queens. !

} 1.Rf6*h6[-h6][+wRh2] Re2*e3[-e3][+bRf8] 2.Rf8-f6 Rh2-e2 # {
starting position with the Be3 and, incidentally, the Ph6 less ;
same remark for the two Rooks}

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