MESON Chess Problem Database

Problem Display
PID: 173592 (5n1r/4p2k/8/6QK/6N1/8/8/8 w - - 0 1)

Boros, Sandor

Magyar Sakkvilag, 1926

5n1r/4p2k/8/6QK/6N1/8/8/8

#2

3 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rg8
      • 2.Qh6#
    • 1...Se6
      • 2.Qg6#
    • 1...Sg6
      • 2.Qxg6#
    • 1...Sd7
      • 2.Qg6#
    • 1...e5
      • 2.Sf6#
    • 1...e6
      • 2.Sf6#
  • Tries
    • 1.Se5?
      • 1...Rg8
        • 2.Qh6#
      • 1...Sg6
        • 2.Qxg6#
      • 1...Se6
        • 2.Qg6#
      • 1...Sd7
        • 2.Qg6#
      • 1...e6!
  • Keys
    • 1.Sh6!
      • threat
        • 2.Qxe7#
      • 1...Rg8
        • 2.Qxg8#
      • 1...Sg6
        • 2.Qxg6#
      • 1...e6
        • 2.Qe7#
      • 1...Se6
        • 2.Qg6#
      • 1...e5
        • 2.Qe7#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • R(d);SBLOCK::QAR1(B)
    • S(c);N_GUARD::QAB1(B)
    • S(c);N_GUARD::QAB1(B),XS(c)
    • P(a);N_GUARD::S(A)
  • Tries
    • Try
      • S(A);
      • Vars
        • R(d);SBLOCK::QAR1(B)
        • S(c);N_GUARD::QAB1(B),XS(c)
        • S(c);N_GUARD::QAB1(B)
      • Refutation
        • P(a);
  • Actual
    • S(A);
    • Threat
      • QAR(B),XP(a)
    • Vars
      • R(d);N_GUARD::QAB1(B),XR(d)
      • S(c);N_GUARD::QAB1(B),XS(c)
      • P(a);::QAR(B)
      • S(c);N_GUARD::QAB1(B)
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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).