20 July 2012

Black or White or ?

This is the last part of the series. Maybe you enjoyed it at least a bit, maybe you've been waiting impatiently for a change of the subject.

What else is there to show that makes me write another post about colour changes? Well, so far, we've seen pieces be a) white or b) black. But another phase c) could be to remove the piece. Look what I have found.

  1Christopher John Feather  
Black to play, 1994
[6nB/5pQK/7p/4r3/r3pk2/8/4p3/8]
  h#2(3+8)  
a) Diagram
b) wPe4
c) -bPe4

  2Hans Peter Rehm  
problem 09/1966
[3n4/q2pr3/1n1kP3/P2B2p1/3B2r1/PR1P1p2/KP2PP2/8]
  h#2(11+9)  
a) Diagram
b) bBd4
c) bBd4, bBd5
d) bBd5
e) -wBd5
f) -wBd4
g) -wBd4, bBd5
h) -wBd5, bBd4
i) -wBd4, -wBd5
Solutions
1a) 1. Ke3 Qxe5 2. Kd3 Qc3#
b) 1. Rh5 Qc3 2. Kg5 Qg3#
c) 1. Kf5 Qg3 2. Rg4 Qxe5#
If you examine the white moves you'll see that they are cyclic. Very nice composition!
2a) 1. Nc8 Bxa7 2. Kc7 Bb8#
b) 1. Kc5 a4 2. d6 Rb5#
c) 1. Nc4 Rb6+ 2. Kc5 b4#
d) 1. Bc6 Rb5 2. Nxe6 Be5#
e) 1. Kxe6 Rxb6+ 2. Kf5 Rf6#
f) 1. Ke5 d4+ 2. Kf4 Rxf3#
g) 1. Kc5 d4+ 2. Kc4 Rb4#
h) 1. Kc5 Rxb6 2. d5 b4#
i) 1. Ke5 Rb5+ 2. Kf4 e3#
We see all possible combinations of the bishops on d4 and d5 being white, black or absent. Wow!

The third phase c) in the final four chess problems uses a neutral piece, another great idea. We get to see eleven model model mates.

  3Jorge Joaquin Lois  
Problemas 10-12/1981
dedicated to R. Candela Sanz
[8/8/kb6/5K2/1P2PQ2/8/8/8]
  h#2(4+2)  
a) Diagram
b) bPb4
c) nPb4

  4Michel Caillaud  
Phenix 07-08/2002
 
[5N1N/4K3/6Pp/7k/8/7B/5B2/8]
  h#2(6+2)  
a) Diagram
b) bNh8
c) nNh8

  5Kjell Widlert  
  
Springaren 05/1998
[4K3/b7/1P6/Nk6/rbNP4/p2P4/8/7B]
  h#2(7+5)  
a) Diagram
b) bBh1
c) nBh1

  6Pieter Barend van Dalfsen  
Albertus Marinus Koldijk  
Probleemblad 1997
[8/8/8/8/6Pn/8/3NK1kb/6R1]
  h#2(4+3)  
a) Diagram
b) bRg1
c) nRg1
Solutions
3a) 1. Bd8 Qb8 2. Ba5 b5#
b) 1. Kb5 Qd2 2. Kc5 Qd5#
c) 1. nPb3 e5 2. Ka5 Qa4#
4a) 1. Kg5 Bg3 2. h5 Nf7#
b) 1. Nf7 Ne6 2. Ng5 Nf4#
c) 1. nNxg6+ nNf4+ 2. Kg5 Ne6#
5a) 1. Rxa5 Kd7 2. Ra6 Bc6#
b) 1. Bb7 Nc6 2. Ba6 Nxa7#
c) 1. nBa8 Nb7 2. Kc6 Nd6#
6a) 1. Kh3 Nf1 2. Bg3 Rxg3#
b) 1. Kh1 Ne4 2. Ng2 Nf2#
c) 1. Kh3 Ne4 2. nRxg4 Nf2#

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