MESON Chess Problem Database

Problem Display
PID: 99606 (3k4/2nBp3/2K4p/7Q/8/8/8/8 w - - 0 1)

Ballo, Gyorgy

Hun, Sandor

Magyar Sakkvilag, 1927

3k4/2nBp3/2K4p/7Q/8/8/8/8

#2

3 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sb5
      • 2.Qe8#
    • 1...Sd5
      • 2.Qe8#
    • 1...Sa6
      • 2.Qe8#
    • 1...Se6
      • 2.Qe8#
    • 1...Sa8
      • 2.Qe8#
    • 1...Se8
      • 2.Qxe8#
    • 1...e5
      • 2.Qh4#
    • 1...e6
      • 2.Qh4#
  • Tries
    • 1.Qg6?
      • 1...e5
        • 2.Qf6#
      • 1...e6
        • 2.Qf6#
      • 1...Se6
        • 2.Qe8#
      • 1...Sb5
        • 2.Qe8#
        • 2.Qg8#
      • 1...Sd5
        • 2.Qe8#
        • 2.Qg8#
      • 1...Sa6
        • 2.Qe8#
        • 2.Qg8#
      • 1...Sa8
        • 2.Qe8#
        • 2.Qg8#
      • 1...Se8
        • 2.Qxe8#
      • 1...h5!
    • 1.Qf7?
      • 1...Se6
        • 2.Qe8#
      • 1...Sb5
        • 2.Qe8#
        • 2.Qg8#
        • 2.Qf8#
      • 1...Sd5
        • 2.Qe8#
        • 2.Qg8#
        • 2.Qf8#
      • 1...Sa6
        • 2.Qe8#
        • 2.Qg8#
        • 2.Qf8#
      • 1...Sa8
        • 2.Qe8#
        • 2.Qg8#
        • 2.Qf8#
      • 1...Se8
        • 2.Qxe8#
      • 1...e5
        • 2.Qf6#
      • 1...e6
        • 2.Qf6#
      • 1...h5!
    • 1.Qh2?
      • threat
        • 2.Qxc7#
      • 1...e5
        • 2.Qh4#
      • 1...e6
        • 2.Qh4#
      • 1...Se6
        • 2.Qb8#
      • 1...Sb5
        • 2.Qb8#
      • 1...Sd5
        • 2.Qb8#
      • 1...Sa8
        • 2.Qb8#
      • 1...Se8
        • 2.Qb8#
      • 1...Sa6!
  • Keys
    • 1.Qe5!
      • threat
        • 2.Qxc7#
      • 1...e6
        • 2.Qf6#
      • 1...Se6
        • 2.Qb8#
      • 1...Sb5
        • 2.Qb8#
        • 2.Qh8#
      • 1...Sd5
        • 2.Qb8#
        • 2.Qh8#
      • 1...Sa6
        • 2.Qh8#
      • 1...Sa8
        • 2.Qb8#
        • 2.Qh8#
      • 1...Se8
        • 2.Qb8#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • S(b);N_GUARD::QAR1(A)
    • S(b);N_GUARD::QAR1(A),XS(b)
    • P(c);OGATEB::QAB(A)
  • Tries
    • Try
      • Q(A);
      • Vars
        • P(c);OGATEB::QAB(A)
        • S(b);N_GUARD::QAR1(A)
        • S(b);N_GUARD::QAR1(A),XS(b)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Vars
        • S(b);N_GUARD::QAR1(A)
        • S(b);N_GUARD::QAR1(A),XS(b)
        • P(c);OGATEB::QAB(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Threat
        • QAB1(A),XS(b)
      • Vars
        • P(c);OGATEB::QAB(A)
        • S(b);OGATE::QAR2(A)
      • Refutation
        • S(b);
  • Actual
    • Q(A);
    • Threat
      • QAB1(A),XS(b)
    • Vars
      • P(c);OGATEB::QAB(A)
      • S(b);OGATE::QAR2(A)
      • S(b);N_GUARD::QAR(A)
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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).