MESON Chess Problem Database

Problem Display
PID: 206525 (4nk1K/2pP3Q/2Pp2p1/3P2pb/6p1/6P1/8/8 w - - 0 1)

Szasz, Lajos

Uj Nemezdek, 1925

4nk1K/2pP3Q/2Pp2p1/3P2pb/6p1/6P1/8/8

#2

6 + 8

6490 yacpdb 2020
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sf6
      • 2.Qg7#
    • 1...Sg7
      • 2.Qxg7#
  • Tries
    • 1.Qxg6?
      • threat
        • 2.dxe8Q#
        • 2.dxe8R#
      • 1...Ke7
        • 2.dxe8Q#
        • 2.dxe8R#
      • 1...Sf6
        • 2.Qg7#
      • 1...Sg7
        • 2.Qxg7#
      • 1...Bxg6!
    • 1.d8S?
      • threat
        • 2.Se6#
        • 2.Qf7#
      • 1...Sf6
        • 2.Qf7#
      • 1...Sg7!
  • Keys
    • 1.d8B!
      • threat
        • 2.Be7#
        • 2.Qg8#
        • 2.Qe7#
      • 1...Sf6
        • 2.Qe7#
      • 1...Sg7
        • 2.Qg8#

Anticipated by 43814(1912)

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(g);N_GUARD::QAB1(E)
    • S(g);N_GUARD::QAB1(E),XS(g)
  • Tries
    • Try
      • Q(E);XP(e)
      • Threat
        • PXS(g)=Q
      • Vars
        • K(h);S_FLIGHT::PXS(g)=Q
        • S(g);N_GUARD::QAB1(E)
        • S(g);N_GUARD::QAB1(E),XS(g)
      • Refutation
        • B(c);XQ(E)
    • Try
      • P(D);
      • Threat
        • DUALS(2)
      • Vars
        • S(g);::QAR1(E)
      • Refutation
        • S(g);
  • Actual
    • P(D);
    • Threat
      • DUALS(3)
    • Vars
      • S(g);::QAB1(E)
      • S(g);::QAR1(E)
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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).