Chess problem details
 Chess problem diagram
Category: Fairy
Type: h#n
Stipulation(s): H#4 2 sol
b)bPc4-->d4
Magazine: Seven chess notes 177, 10/2020, Pr.8933
Year of Publishing: 2020
Conditions:
Einstein + PWC
Solution:

a) diagram

1.c4-c3   e4*d5=S[+bPe4]  
2.e4-e3   Sd5*e3=B[+bPd5]  
3.Ke5-e4 Be3*g5=R[+bBe3]  
4.Ke4-d4 Rg5*d5=Q[+bPg5] #

1.Bg5-f6=S e4*d5=S[+bPe4]  
2.Sf6*d5=B[+wSf6] Sf6*d5=B[+bBf6]  
3.Ke5*d5[+wBe5] Be5*f6=R[+bBe5]  
4.Be5-d6=S Rf6*d6=Q[+bSf6] #

b) bPc4-->d4 

1.d4-d3 e4*d5=S[+bPe4]  
2.Ke5*d5[+wSe5] Se5*d3=B[+bPe5]  
3.Bg5-f4=S Bd3*e4=R[+bPd3]  
4.Kd5*e4[+wRd5] Rd5*d3=Q[+bPd5] #

1.Bg5-d2=S e4*d5=S[+bPe4]  
2.e4-e3 Sd5*e3=B[+bPd5]  
3.Sd2-c4=P Be3*d4=R[+bPe3]  
4.Ke5*d4[+wRe5] Re5*e3=Q[+bPe5] #

Comments:
Tags:
Model mates, exchange of places, chameleon echo, circuit, switchback, Zajic, Chumakov, Kniest, selfblock, sacrifice, reciprocal captures
        

       

       

       
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