py_20211207
Click in the right part of the chessboard to move forward, left to move backward... or directly on the move in the solution
1 - h2# 3 solutions with locusts
Dragoun, M & Salai L2018
white WLb7g6d2 Pf3c5 Kf2
black BLd5e6h7f4 Pg2b6a3h6 Ke5 Sa8 Bc1
h#2 3sol.(6+11)🨊b7, g6, d2, 🨐d5, e6, h7, f4: Locust
{}
1.Bc1-b2 WLb7*d5-e4 2.BLf4*d2-c1 WLg6*e6-d6 # {}
1.Sa8-c7 WLg6*e6-d6 2.BLd5*b7-a8 WLd2*f4-g5 # {}
1.h6-h5 WLd2*f4-g5 2.BLe6*g6-h6 WLb7*d5-e4 #
2 - h2# 2 solutions take and make
Tritten, P.2013
white Sd5 Kg6 Bh1 Rg1
black Ba1 Ra8 Pc7a2 Kh2
h#2 Take&Make(4+5)2 solutions
{}
1.Ba1-c3 Sd5*c3-d2 2.Kh2*g1-a1 Bh1*a8-h8 # {}
1.Ra8-a7 Sd5*c7-c5 2.Kh2*h1-a8 Rg1*a1-h8 #
3 - h#2 andernach b) ♝f8 on g5 c) ♝f8 on c3
Petkov, P.1997
white Kc8 Sd6 Qh2h1
black Bf8f3 Pb7a2e5g4g3g2h3 Kf4 Rh4e2 Sg1
h#2 Andernach(4+13)b) ♝f8 --> g5c) ♝f8 --> c3
{}
a) {}
1.Rh4-h8 Qh2*h3=b 2.Qh3-h7 Qh1-h6 # {}
b) bBf8-->g5 {Bf8 --> g5}
1.Bf3-c6 Qh2*g2=b 2.Qg2-d5 Qh1-e4 # {}
c) bBf8-->c3 {Bf8 --> c3}
1.Re2-b2 Qh1*g2=b 2.Qg2-c2 Qh2-d2 # {}
4 - h#2 2 solutions make & take
make & take the capturing unit first moves like the unit it wishes to capture (Make), then performs that capture by moving normally (Take). In the first phase, it is not allowed to capture.Geissler, N.2019
white Pb7 Kh6
black Ka1 Pb2
h#2 Make&Take(2+2)2 solutions
{
} 1.b2-b1=S b7-b8=Q + {(check by first passing through a8 or a7)} 2.Sb1-a3 {(prevents check)} Qb8-h8 # {
it is well checkmate because } 3.Ka1*h8 {via g7 would be followed by} Kh6*h8 ! {via g7 or h7 One might think that } 2...Qb8-e5 + {checkmate but there are 2 ways to avoid this : } 3.Sa3*e5 {via d3 or f3 and} 3.Ka1*e5 {via d4} 1.b2-b1=R {Note that Queen promotion would check via c1} b7-b8=B ! {It should also be noted that the Queen promotion checking via a7 or a8 could only be parried by Kxb8 via a7 or a8, the Rook not being able to interpose on the a-file} 2.Rb1-b2 Bb8*b2 # {via h8 ! Note that White King could not be elsewhere than in h6, under risk of insolubilities or demolitions. As in Forsberg's famous (and brilliant) Helpmate 2#. The White King could not be on g6 because on 2...Qh8+ would follow 3.Kb1 (no Qh7xb1) nor on f7 (3.Ka2). AUW}
} 1.b2-b1=S b7-b8=Q + {(check by first passing through a8 or a7)} 2.Sb1-a3 {(prevents check)} Qb8-h8 # {
it is well checkmate because } 3.Ka1*h8 {via g7 would be followed by} Kh6*h8 ! {via g7 or h7 One might think that } 2...Qb8-e5 + {checkmate but there are 2 ways to avoid this : } 3.Sa3*e5 {via d3 or f3 and} 3.Ka1*e5 {via d4} 1.b2-b1=R {Note that Queen promotion would check via c1} b7-b8=B ! {It should also be noted that the Queen promotion checking via a7 or a8 could only be parried by Kxb8 via a7 or a8, the Rook not being able to interpose on the a-file} 2.Rb1-b2 Bb8*b2 # {via h8 ! Note that White King could not be elsewhere than in h6, under risk of insolubilities or demolitions. As in Forsberg's famous (and brilliant) Helpmate 2#. The White King could not be on g6 because on 2...Qh8+ would follow 3.Kb1 (no Qh7xb1) nor on f7 (3.Ka2). AUW}
5 - h#2 2 solutions Argentinian units b) ♗a1 --> g1
Pachl, F.2018
white Ba1 Pc5b5 Kh4 SAf7 WLg8 WFf8
black Ke4 SEe5 BLh8a2 BFf1
h#2 2sol.(7+5)b) ♗a1 --> g1
🨍f7: Saltador🨌g8, 🨒h8, a2: Loco🨋f8, : Faro🨐e5: Señora
{}
a) {}
1.SEe5-e2 WFf8-f3 2.BFf1-f6 SAf7-g5 # {}
1.SEe5-e3 WLg8-c4 2.BLa2-e6 SAf7-d6 # {}
b) wBa1-->g1 {Ba1 --> g1}
1.BFf1*f7 WLg8-d5 + 2.Ke4-f4 WFf8*f7 # {}
1.BLa2*f7 WFf8-f4 + 2.Ke4-d5 WLg8*f7 #
6 - 2# AMU
Gockel, H.2018
white Rb4g7 Pc5e7f2 Qc8 Kh7 Sg8f5 Be6h6
black Kh5 Ph4h3 Qh2
#2 amu(11+4)
{}
1.Rg7-g1 ! {(threatens } 2.Rg1-g5 # {)}
1...Qh2*g1 {(or} 1...Qh2-g2 {or} 1...Qh2-g3 {)} 2.Sg8-f6 # {}
1...Qh2-b8 2.Rb4*h4 # {(} 2.Qc8-e8 + ? Qb8*e8 {)}
1...Qh2-c7 2.Qc8-e8 # {(} 2.e7-e8=Q {is illegal)}}
1...Qh2-d6 2.e7-e8=Q # {(or } 2.e7-e8=B # {) and not} 2.Be6-f7 + ? Qd6-g6 + ! {}
1...Qh2-e5 2.Be6-f7 # {( } 2.Sf5-g7 + ? Qe5*g7 + ! {)}
1...Qh2-f4 2.Sf5-g7 #
{(2 Rxh4 illegal)Fivefold anti-dual cycle, say the experts.}
Add a comment