py_20200218

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or directly on the move in the solution

1 - h#4,5 bicolores

bicolores a King is also in check by the units of his own side.

Caillaud, M.
2009

white Ph2b4 Kb5 Bg8 black Ph3 Kg4 Rc3

h#4.5 bicolores(4+3)

Solution

{

} 1...Bg8-a2 2.Rc3-b3 Kb5-c4 3.Rb3-f3 + Kc4-d4 4.Rf3-f8 Ba2-f7 {
} 5.Kg4-f3 Bf7-h5 # {

White bishop-Black Rook battery then black Rook-white Bishop battery !}

2 - 2# masand

masand in masand, any piece "observed" by a checking piece will change colour.

Gockel, H.
2019

white Bc8a1 Kf7 Qg2 Pf5b4 Sg5h5 Rd8 black Pg6d5a6b5b3e2 Ke5 Ba3c2 Sd4c3

#2 masand(9+11)

Solution

{

} a) {
essai
} 1.Kf7-e7 ? {threatening} 2.Sg5-f7[d8=b] # {
} 1...Sd4-f3 2.Qg2*e2[c2=w][f3=w][b5=w] # {
} 1...Sd4*f5 + 2.Qg2-e4[c2=w][e2=w][b4=b][d5=w][f5=w] # {
} 1...Sd4-e6 2.Rd8*d5[b5=w] # {
} 1...Sd4-c6[b4=b][d8=b] + 2.Qg2*d5[b3=w][b5=w][c6=w][d8=w] # {
} 1...g6*h5 2.Qg2-h2[e2=w][h5=w] # {
} but 1...Ba3*b4[c3=w] + ! {
real play
} 1.Kf7-g7 ! {threatening} 2.Sg5-f7[d8=b] # {
} 1...Sd4-f3 2.Qg2*e2[c2=w][f3=w][b5=w] # {
} 1...Sd4*f5 + 2.Qg2-e4[c2=w][e2=w][b4=b][d5=w][f5=w] # {
} 1...Sd4-e6[g5=b][d8=b] + 2.Qg2*d5[b3=w][b5=w][e6=w][d8=w] # {
} 1...Sd4-c6 2.Rd8*d5[b5=w] # {
} 1...g6*h5 2.Qg2-h2[e2=w][h5=w] # {

} b) +bQa3 {Qa3
try
} 1.Kf7-g7 ? {threatening} 2.Sg5-f7[d8=b] # {
} 1...Sd4-f3 2.Qg2*e2[c2=w][f3=w][b5=w] # {
} 1...Sd4*f5 + 2.Qg2-e4[c2=w][e2=w][b4=b][d5=w][f5=w] # {
} 1...Sd4-e6[g5=b][d8=b] + 2.Qg2*d5[b3=w][b5=w][e6=w][d8=w] # {
} 1...Sd4-c6 2.Rd8*d5[b5=w] # {
} 1...g6*h5 2.Qg2-h2[e2=w][h5=w] # {
} but 1...Qa3*b4 ! 2.Sg5-f7[d8=b] + Qb4-f8[f7=b][d8=w] + {
real play
} 1.Kf7-e7 ! threat: 2.Sg5-f7[d8=b] # 1...Qa3*b4[b3=w][c3=w][d4=w][b5=w] + 2.Sd4-c6[b4=w][d8=b] # {
} 1...Sd4-f3 2.Qg2*e2[c2=w][f3=w][b5=w] # {
} 1...Sd4*f5 + 2.Qg2-e4[c2=w][e2=w][b4=b][d5=w][f5=w] # {
} 1...Sd4-e6 2.Rd8*d5[b5=w] # {
} 1...Sd4-c6[b4=b][d8=b] + 2.Qg2*d5[b3=w][b5=w][c6=w][d8=w] # {
} 1...g6*h5 2.Qg2-h2[e2=w][h5=w] # {

Exchanged mats between trial & real play (between the 2 twins).}

3 - hs==5 köko with royal lions & archiBishops

Köko In Köko, at the end of its move, a piece must be in contact with another
. lion the Lion needs a sautoir behind which it lands on one of the squares free or occupied by an opponent's piece
archbishop Bishop rebounds to the board

Novomesky, D.
2013

white ARa1 white Royal LIb1 black ARe7 black Royal LIc7

hs==5(2+2)
b1, c7: Royal Lion
a1, e7: ArchiBishop

Solution

{

} {

} a) {
} 1.ARa1-b2 ARe7-d6 2.ARb2-e7+ {(via c1-h6-f8)} rLIc7-f7 3.ARe7-c7 rLIf7-b7 4.ARc7-c5 {(via b8-a7)} ARd6-b4 {(via f8-h6-c1-a3)} 5.ARc5-b6 ARb4-b2 {(the other moves of the AR are self-checks) ==. Double pat: the 2 Archbishops are pinned and each move by Lion would check him by his colleague. Except a "null" move like Bb6-b6 (via d8-h4-e1-a5)

} b) wrLIb1-->g4 {royal Lion b1 to g4
} 1.ARa1-f6 ARe7-f4 {(via a3-c1 or f8-h6)} 2.ARf6-b6 {(via h4-e1-a5)} ARf4-g3 3.ARb6-f2 ARg3-g5 4.rLIg4-g6 ARg5-f6 5.rLIg6-b6 + {(the Arf2 targeting Lrc7 via g1-h2 is now checking in köko)} ARf6-g3 {== : both Lrd8, Lrg1 and ...Lra5, Lrh2 are forbidden by the Ar, which are pinned

} c) wrLIb1-->c8 {royal Lion b1 to c8
} 1.rLIc8-c6 rLIc7-c5 2.ARa1-f6 {(would have checked on the 1st move because of the rLc8)} ARe7-g5 3.rLIc6-h6 ARg5-b4 4.ARf6-d4 + rLIc5-e3 5.ARd4-f4 + {(via a7-b8, checking by the rL, but not by the Ar in köko)} ARb4-g5 {(via e1-h4) ==. Ar are pinned, Lr's are frozen.

No echo: instead, the three double pats are varied.}

4 - 2# Shrinking Men

Shrinking men "" (rétrécissants) : a unit may not play longer move than the previous one. The convention used here for promotions is that the promoted unit is "reborn" and may play any distance it wishes.

Bissicks, P.
2019

white Qb7 Pd6 Kg7 black Pd7e6 Ke8 Ra8

#2 Shrinking men(3+4)

Solution

{

Essais :
} 1.Qb7*a8 ? {don't check
} 1.Qb7-f3 ? {(5,66 long) O-O-O ! (legal because Queen can come from a promotion on b8, then Qb1, of length 7 and Qb7 of length 6)} 1...Ke8-d8 ? 2.Qf3-f8 # {(5 long)} 2.Qf3*a8 # {is illegal

} 1.Qb7-h1 ! {(8,48 long)
} 1...Ke8-d8 {(1... O-O-O illegal)} 2.Qh1-h8 # {
Before playing Qb7-h1, White Queen could only have played moves of greater or equal length.
So it could not have come from d1 (nor from a promotion to b8, c8 etc.) but comes from a promotion to a8 (to Qa8-h1 and then Qh1-b7),
which broke castling.}

5 - 2# anti-circe with Grasshoppers

Anti-circe after a capture, the captured piece disappears and the capuring one is reborn on its original square if it is free
Grasshopper piece moving on the Queen's lines with the help of a sautoir behind which it lands if the square is free or occupied by an opposing piece

Stojnic, D.
2010

white Ph7f3f2e2c2a3 Se6f6 Be8e5 Ka4 Rg2 black Pg7g6h4f4c3a5 Kc4 Sa1 Gh2f7

#2 (12+10)

Solution

{

} 1.Ka4-b5 + ? Gh2*e5[bGe5->e1] ! {occupying the rebirth square of the white King.
} 1.Be8-b5 + ? Gh2*f2[bGf2->f1] ! {occupying the white Bishop's rebirth square.
} 1.Rg2-g4 ? {(threatens} 2.Be8-b5 # {, but not} 2.Be5*f4[wBf4->c1] + ? Gf7*h7[bGh7->h1] ! {, nor} 2.Ka4-b5 + ? Gh2*e2[bGe2->e1] ! {)
Grasshoppers parry the threat by threatening 2...Gxf3-f1!)
} 1...Gh2-h5 {display-departure-rank}? 2.Ka4-b5 # {
} 1...Gf7-h5 ? {display-departure-rank} 2.Be5*f4[wBf4->c1] # {.
But} 1...Gf7-f5 ! 2.Be8-b5 + Gf5*f3[bGf3->f1] ! {
} 1.Be5-b8 ? {(or elsewhere)} Gf7-h5 ! {display-departure-rank} {

} 1.Be5*f4[wBf4->c1] ! {(menace} 2.Ka4-b5 # {)
} 1...Sa1*c2[bSc2->g8] 2.Ka4-b3 # {
Grasshoppers parry the threat by threatening 2...Gxe2-e1!
} 1...Gh2-h5 {display-departure-rank} 2.Be8-b5 # {
} 1...Gf7-h5 {display-departure-rank} 2.Rg2-g4 # {

Cycle ABCD-DCBA.}

6 - h#3 2 sol parrain circe with neutral pieces

parrain circe a captured piece remains "under the square" of capture.
It makes an equipollent move (from that square) to that of the next playing piece
. neutral piecea piece that can be played by both sides

Golha, J.
2010

neutral Sb3 Bc2c1 black Kc3 Rb2 white Kf3

h#3 2sol.(1+2+3)

Solution

{

} 1.nBc1-e3 Kf3*e3 2.nSb3-c1[+nBf1] nSc1-a2 + 3.Kc3*c2 nBf1-d3[+nBa4] # {

} 1.nSb3-d2 + nBc1*d2 + 2.Kc3*c2[+nSd1] nSd1*b2[+nBa3] 3.Kc2*d2[+bRc2] nBa3-b4[+nBe3] # {

Chameleon echo.}

7 - 7# lost pieces

lost piecesIn Lost Pieces (Verlorene Steine), after each move I play
all my opponent's units automatically disappear if they are attacked by a unit of my side, without being able to evade it.
But if the unit attacked by me has an available square, even if it is pinned, it does not disappear.

Werner, D.
2017

white Sc4e1 Rg2g4 Kh1 black Kf5 Pa6e3e4e6f6h4 Ra3e5 Ba8b8 Sd2

#7 lost pieces(5+12)

Solution

{

} 1.Sc4-d6 + ? Bb8*d6 {

} 1.Rg4-g8 ! {(Menace} 2.Rg8-f8[-f6] # {.)
} 1...Bb8-d6 ? 2.Sc4*d6[-e4] + Kf5-f4 3.Rg8-g4 # {display-departure-rank} {
} 1...Kf5-f4 2.Rg2-g4 +{display-departure-rank} Kf4-f5 3.Rg4-g7[-b8]{display-departure-rank} {(Threatens} 4.Rg7-f7[-f6] # {ou} 4.Rg8-f8[-f6] # {.)} 3...Kf5-f4 4.Rg7-g4 + Kf4-f5 5.Rg4-g2 {!! (Threatens} 6.Sc4-d6[-e4] + {et} 7.Rg8-g4 #{display-departure-rank} { (5.Nd6+ (remove Pe4) is a self-check)} 5...Kf5-f4 6.Rg8-g4 +{display-departure-rank} Kf4-f5 7.Sc4-d6[-e4] #

8 - PG 6,5 lost pieces

Solution

9 - #3 lost pieces

Maeder, Th & Sick O
2017

white Pf5d3 Ka6 Rg6d5 Be8 black Pa7e5 Kh8 Bc1

#3 lost pieces(6+4)

Solution

{

Why was Pa7 not removed just before arriving at the diagram? The only possibility is that the last white move was Ka6 with a PNb7! The Pa7 does not disappear because Black can evade the attack by ... bxa6. But Pb7 disappears! Moreover, the only way that Pe5 can only have not disappeared is that it was not already in e5. And he cannot come that of e7, because in e6, Rg6 would have been intercepted and thus Pb7 could have been intercepted to protect from attack. The "prise en passant" is therefore justified.

} 1.f5-f6[-e5][-a7] ? Bc1-g5 ! 2.Rd5*g5 {display-departure-file} Kh8-h7[-g6] {

} 1.f5*e6 ep.[-a7] ! Bc1-g5 2.Rd5*g5 Kh8-h7 {
g6 Rook does not disappear because it has the leak in f6.)} 3.Rg5-h5 #

10 - series #10 anti-patrol (ou lortap)

anti-patrol one must not be supported by a unit of one's own side to take or give check.

Sobrecases, G.
2008

white Sa2 Kb3 black Qf6 Pa3c5d6e7g6f5e4d3 Kb1 Bf8h7

ser-#10 lortap(2+12)

Solution

11 - #3 circe

Petkov, P.
1975

white Qd8 Pc6e7a4d4d2e2 Kd1 Ra5 Bg1f3 black Qg8 Pb4b3g6 Rb7 Ba7e8 Kc4

#3 Circé(11+8)

Solution

{

} 1.Ra5-c5 + ? Ba7*c5[+wRa1] ! 2.Ra1-c1+ Be8*c6[+wPc2] ! {
} 1.Bf3-d5 + ? Qg8*d5[+wBf1] ! 2.e2-e3 + Rb7*e7[+wPe2] ! {
( playing 2 e4+ instead of e3 doesn't change anything :} 2.e2-e4 + Rb7*e7[+wPe2] 3.e2-e3 + Re7*e4[+wPe2] ! {)
} 1.Qd8-d7 ? b3-b2 ! {

} 1.Kd1-e1 ! {(threatening} 2.Qd8-d5 + Qg8*d5[+wQd1] 3.Qd1*b3 # {)
} 1...Rb7-d7 2.Ra5-c5 + 2...Ba7*c5[+wRa1] 3.Ra1-c1 # {
} 1...Be8-d7 2.Bf3-d5 + 2...Qg8*d5[+wBf1] 3.e2-e3 # {
(et non } 3.e2-e4+ ? Qd5*e4 [+wPe2] {)

Grimshaw Theme.}

12 - h#2 2 sol rose & locuste

roseExtended knight in a rounded shape
Typically, in addition to normal Knight moves, the Rose e6 can go to c5, b3, c1, f4, e2, c1, a2, g5, h3 and g1.
locusteGrasshopper eating its hurdle, which is therefore necessarily an opponent's piece.

Boyer, JP.
1986

white Ka6 ROe6 Lf1 black Ke4 Bh5

h#2 2sol.(3+2)
e6: Rose
f1: Locuste

Solution

{

} 1.Ke4-e3 ROe6-h3 2.Bh5-e2 + Lf1*e2-d3 # {

} 1.Bh5-f3 ROe6-f8 2.Ke4-f5 Lf1*f3-f4 # {

Chameleon-echo, vertical-horizontal echo.}

13 - h=3,5 circe

Bakcsi, G.
2005

white Pe4 Sb5c4d3f5 Kg7 black Sg8 Ra3c3 Kc6

h=3.5 Circe(6+4)

Solution

{

} 1...Kg7-h8 {To prohibit the rebirth of Rooks in h8.} 2.Kc6*b5[+wSb1] Sb1*c3 + 3.Kb5*c4[+wSb1] Sb1*a3 + 4.Kc4*d3[+wSb1] Kh8*g8 {pat!}

14 - h#2 2 solutions anti-circe couscous madrasi

anti-circe couscousthe capturing piece is reborn on the original square of the captured piece.
madrasitwo opposing pieces of the same nature which observe each other are mutually paralysed

Tritten, P.
2014

white Kc4 Rf5 Sg3f8 Bh5 black Rc7 Kc6 Bb7

h#2 2sol.(2+3)
Anti-circe couscous
madrasi

Solution

{

} 1.Rc7-h7 Rf5-f6 + 2.Rh7*h5-f1 Sg3*f1-a8 {

} 1.Bb7-c8 Bh5-f3 + 2.Bc8*f5-h1 Sg3*h1-c8

15 - h#2 2 solutions with kangourou et Andernach Grasshopper

kangouroua cousin of the Grasshopper who needs a double hurdle
Andernach GrasshopperGrasshopper that makes the colour of the hurdle change each time it jumps

Agostini, V.
2014

white Sg2 Kh2 Gb4 black KAh1 Bd2 Kd1 Qg7 Sc2 Re2

h#2 2sol.(3+6)
h1: Kangourou
b4: Andernach Grasshopper

Solution

{

} 1.Qg7-d4 Gb4-e4[d4=w] 2.KAh1-d5 Ge4-c6[d5=w] # ! {

} 1.Qg7-g4 Gb4-h4[g4=w] 2.KAh1-h5 Gh4-h6[h5=w] # !

16 - #2 patrol

patrol
to make a capture, it is necessary, on the starting square of the move, to be "observed" by a friendly piece.

Bouma, G.
2012

white Pe6f4g4h5f2e2b2b4 Sg2d2 Bc6 Kc4 black Ke4

#2 patrol(12+1)

Solution

{

} 1.Kc4-d4 ! { (blocus)
} 1...Ke4-d5 2.Kd4-c5 # {
} 1...Ke4-f5 2.Kd4-e5 # {
} 1...Ke4-f3 2.Kd4-e3 # {
} 1...Ke4-d3 2.Kd4-c3 # {

Star of each King.}

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