MESON Chess Problem Database

Problem Display
PID: 248130 (k7/ppBppp2/5R2/pN3p2/N4P2/5K2/3R4/4Q3 w - - 0 1)

Blikeng, Bjarne

Thema Danicum, 1979

k7/ppBppp2/5R2/pN3p2/N4P2/5K2/3R4/4Q3

#2

8 + 8

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...a6
      • 2.Sb6#
    • 1...exf6
      • 2.Qe8#
  • Tries
    • 1.Ra6?
      • threat
        • 2.Sb6#
        • 2.Rxa7#
      • 1...b6
        • 2.Rxa7#
      • 1...bxa6!
    • 1.Qf2?
      • threat
        • 2.Qxa7#
      • 1...a6
        • 2.Sb6#
        • 2.Qa7#
      • 1...b6!
    • 1.Qg1?
      • threat
        • 2.Qxa7#
        • 2.Qg8#
      • 1...a6
        • 2.Sb6#
        • 2.Qa7#
        • 2.Qg8#
      • 1...b6!
    • 1.Qe3?
      • threat
        • 2.Qxa7#
      • 1...a6
        • 2.Sb6#
        • 2.Qa7#
      • 1...b6!
  • Keys
    • 1.Qe6!
      • 1...dxe6
        • 2.Rd8#
      • 1...exf6
        • 2.Qe8#
      • 1...fxe6
        • 2.Rf8#
      • 1...b6
        • 2.Qd5#
      • 1...d5
        • 2.Qc8#
      • 1...a6
        • 2.Sb6#
      • 1...d6
        • 2.Qc8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • P(c);N_GUARD::S(D)
    • P(f);OGATE,XR(G)::QAR(A)
  • Tries
    • Try
      • R(G);P_PINP(c)
      • Threat
        • DUALS(2)
      • Vars
        • P(d);::R1(G),XP(c)
      • Refutation
        • P(d);N_SPINP(c),XR(G)
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(c)
      • Refutation
        • P(d);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Refutation
        • P(d);
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(c)
      • Refutation
        • P(d);
  • Actual
    • Q(A);
    • Vars
      • P(e);OGATE,XQ(A)::R(B)
      • P(f);OGATE,XR(G)::QAR(A)
      • P(g);OGATE,XQ(A)::R(G)
      • P(d);OGATEB::QAB(A)
      • P(e);OGATE::QAR2(A)
      • P(c);N_GUARD::S(D)
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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).