py_20250304

1 - 2# breton adverse with Nightriders

Loustau, JM & Gockel H
2021

white Bc4 Kh7 Pf6b2c2d2a7 Rg4f4 Sg6e7 WNa1a6d6g3 black Pe2f2f3e6d7c6h5 Kd4 Qc5 BNe4e1

#2 breton adverse(15+11)
🨢a1, a6, d6, g3, 🨨e4, e1: Nightriders

: Extended Knight in successive jumps in the same direction
: When you take a unit, you remove a second unit of the same type from the same side (if any).

Solution

{

} 1.WNg3*e2[-f3] + ? {is illegal : self-check by Ne1 via f3 and g5
} 1.c2-c3 + ? Qc5*a7[-c3] ! 2.WNa1-b3 + Qa7*a6[-b3] {et} 2.Se7*c6[-d7] + {is illegal : self-check
} 1.Se7*c6[-d7] + ? Qc5*c6[-g6] ! {give e5 square
} 1.WNa1-b3 + ? Qc5*d6[-b3] ! {give c4 square
} 1.Rf4*e4[-e1] + ? h5*g4[-e4] ! 2.WNg3*e2[-f3] + Qc5*d6[-e2] {

} 1.Rg4-h4 ! {(threatens} 2.Rf4*e4[-e1] # {)
} 1...Qc5-d5 2.c2-c3 # {(no Qxa7)
} 1...Qc5-e5 2.Se7*c6[-d7] # {(no Qxc6)} 2.c2-c3 + ? Qe5*f6[-c3] ! {
} 1...Qc5-f5 2.WNa1-b3 # {(no Qxd6)} 2.Se7*c6[-d7] + ? Qf5*g6[-c6] + ! {
} 1...Qc5-g5 2.WNg3*e2[-f3] # {and nor } 2.WNa1-b3 + ? Qg5*g3[-b3] ! {
neither } 2.Rf4*e4[-e1] + ? Qg5*h4[-e4] ! {

Black correction of the 4th degree, say the experts.}

2 - 3# hunter

Avner, U & Maeder Th
2004

white Ka1 Rd6 Sh3 Qg2 PSg4 black Sb2c5 Bc1d1 Pb3e5g3f2 Re1 Ke2

#3(5+10)
🨷g4: pawn/Knight hunter

: as this hunter is a white unit, he plays upwards like a pawn and downwards like a knight

Solution

{

} 1.PSg4*f2 ! {
} 1...Sb2-c4 2.PSf2-f4 + {
(the threat, the Hunter plays forward like a pawn and attacks backwards e2, so it's a double check !)
} 2...Ke2-e3 3.PSf4-f5 # {
(plays backwards as a knight and therefore controls e3)
} 1...Re1-f1 2.PSf2*d1 + {(double check)} Ke2-e1 {(or Ke3)} 3.Qg2-e2 # {
d1 hunter, playing as a pawn, controls e2 square
} 1...Bd1-c2 2.PSf2*g3 + Ke2-e3 3.PSg3-g4 # {
he has played as a pawn but is attacking the Black King as a Knight
} 1...Bc1-f4 2.PSf2-f3 + Ke2-e3 3.PSf3-d2 # {
he has played as a Knight but is attacking the Black King as a pawn
} 1...Re1-g1 2.PSf2*d1 + Ke2-e1 3.Qg2*g1 # {

Albino's three quarters.}

3 - h#2 a) take & make b) anti-circe couscous

Tritten, P.
2015

white Ka7 Rd6d4 Sc2 black Sa8 Re6c4 Ke5 Pb3b2

h#2(4+6)
a) Take&Make
b)Anti-Circe couscous

: after a capture, the capturing unit moves with the march of the captured piece
: After a capture, the capturing unit is moved to the original square of the captured one.

Solution

{

} a) {Take&Make
} 1.Rc4*c2-a3 + Ka7*a8-b6 2.Ke5*d4-a4 Rd6*e6-e4 # {

} b) {AntiCirce Couscous
} 1.Rc4*c2[bRc2->b1] Ka7*a8[wKa8->g8] 2.Ke5*d4[bKd4->a1] Rd6*e6[wRe6->a8] # {

The first phase of the moves is the same in both twins, but everything else differs!
Echoes of Mates.}

4 - h#3 with Equihoppers b) bKe7

Jelliss, G.
2024

white Se5 Ke3 EQf3d2g8a3 black Ka4

h#3(6+1)
b) Ka4-->e7
🩈f3, d2, g8, a3: Equihoppers

: plays symmetrically in relation to any unit, as long as it stays on the board.

Solution

{

} a) {

} 1.Ka4-b3 Se5-c4 2.Kb3-c2 EQa3-e5 + 3.Kc2-d1 EQf3-d3 # {
Eqg8 guards c2. The Knight is not used to checkmate (it is used in b) but has been used in the play.

} b) bKa4-->e7 {Ka4-->e7

} 1.Ke7-f6 EQg8-e4 + 2.Kf6-e7 EQa3-g1 3.Ke7-d6 EQd2-f4 # {
Note that Eqg1 keeps 4 squares of the royal field, c7, e7, c5 & e5}

5 - 2# madrasi

Shankar Ram, N.
1986

white Kd6 Qb5 Bc4c3 Sb1d4 Pa4h7e2 Rg1 black Qe8 Se6 Kb3 Bd5

#2 madrasi(10+4)

: opposing units of the same type that are observing each other are paralysed

Solution

{

} 1.h7-h8=Q ! {blocus
} 1...Kb3*c4 2.Kd6-d7 # {
} 1...Kb3*a4 2.Kd6-c6 # {
Note that} 2.Kd6-d7 {doesn't checkmate because of} 2...Ka4*b5 ! {
} 1...Kb3-c2 2.Kd6*e6 # {
} 1...Kb3-a2 2.Kd6*d5 # {

Star-shaped escape and Greek cross escape.}

6 - h#2 circe assassin

Caillaud, M.
2018

white Pa7d7 Bg2 Kh1 black Bb8e8 Rd8 Kh8 Qa6 Pg3h3f2e2

h#2 circe assassin(4+9)

: a captured piece returns to its original square, even if it is busy.

Solution

{

} 1.f2-f1=S a7*b8=B[+bBf8] 2.e2-e1=R d7*e8=Q[+bBc8] # {
It's really mate :
the Queen will take one of the Rooks (even on} 3.Rd8*e8[+wQd1] {and the rebirth on h8 will explode the Black King.
Who can't come to g8 (} 3.Kh8-g8 Bg2*f1[+bSg8] {), neither h7 (} 3.Kh8-h7 Bg2*h3[+bPh7] {)
nor g7 (} 3.Kh8-g7 Bb8*g3[+bPg7] {).
Note that } 1...a7*b8=Q ? {would check threatening Qxd8

bicoloured AUW.}

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