MESON Chess Problem Database

Problem Display
PID: 178330 (K7/8/2n5/1R6/k7/1R6/1P2N3/1n6 w - - 0 1)

Speckmann, Werner

Berliner Morgenpost, 1979

(First published on Sun May 6 1979)

K7/8/2n5/1R6/k7/1R6/1P2N3/1n6

#2

5 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sd2
      • 2.Sc3#
    • 1...Sa3
      • 2.Sc3#
    • 1...Sc3
      • 2.Sxc3#
    • 1...Sb4
      • 2.R3xb4#
    • 1...Sd4
      • 2.R3b4#
    • 1...Sa5
      • 2.R3b4#
      • 2.R5b4#
    • 1...Se5
      • 2.R3b4#
    • 1...Sa7
      • 2.R3b4#
    • 1...Se7
      • 2.R3b4#
    • 1...Sb8
      • 2.R3b4#
    • 1...Sd8
      • 2.R3b4#
  • Tries
    • 1.Ra3+?
      • 1...Sxa3
        • 2.Sc3#
      • 1...Kxb5!
  • Keys
    • 1.Sd4!
      • 1...Sxd4
        • 2.R3b4#
      • 1...Sd2
        • 2.Ra3#
      • 1...Sa3
        • 2.Rxa3#
      • 1...Sc3
        • 2.Ra3#
      • 1...Sb4
        • 2.R3xb4#
      • 1...Sa5
        • 2.R3b4#
        • 2.R5b4#
      • 1...Se5
        • 2.R3b4#
      • 1...Sa7
        • 2.R3b4#
      • 1...Se7
        • 2.R3b4#
      • 1...Sb8
        • 2.R3b4#
      • 1...Sd8
        • 2.R3b4#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::S(B)
    • S(a);N_GUARD::S(B),XS(a)
    • S(c);N_GUARD::R1(C),XS(c)
    • S(c);N_GUARD::R1(C)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • S(a);XR(C)::S(B)
      • Refutation
        • K(b);S_FLIGHT,XR(D)
  • Actual
    • S(B);
    • Vars
      • S(c);N_GUARD,XS(B)::R1(C)
      • S(a);N_GUARD::R1(C)
      • S(a);N_GUARD::R1(C),XS(a)
      • S(c);N_GUARD::R1(C),XS(c)
      • S(c);N_GUARD::R1(C)
HTML5 logo

Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).