MESON Chess Problem Database

Problem Display
PID: 202610 (8/2pp3K/3R4/2qBkN2/4P2Q/3p2R1/4n3/8 w - - 0 1)

Hertmann, Sandor

Uj Nemezdek, 1923

8/2pp3K/3R4/2qBkN2/4P2Q/3p2R1/4n3/8

#2

7 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sxg3
      • 2.Qxg3#
    • 1...Sf4
      • 2.Qf6#
  • Tries
    • 1.Rg4?
      • threat
        • 2.Qf6#
        • 2.Qe7#
      • 1...Qxd5
        • 2.Qf6#
      • 1...cxd6
        • 2.Qe7#
      • 1...Sd4
        • 2.Qg3#
        • 2.Qf6#
        • 2.Qh2#
      • 1...Sf4
        • 2.Qf6#
      • 1...Qxd6!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Qf6#
      • 1...Kxd4
        • 2.Qf6#
      • 1...Kxd6
        • 2.Qf6#
      • 1...Qxd6
        • 2.Sf3#
      • 1...Qxd5
        • 2.Rxd5#
      • 1...cxd6
        • 2.Sf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • S(a);OGATE,XR(A)::QAB(C),XS(a)
    • S(a);SBLOCK::QAB1(C)
  • Tries
    • Try
      • R(A);
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);XB(D)::QAB1(C)
        • P(e);XR(F)::QAR2(C)
        • S(a);::QAB1(C)
      • Refutation
        • Q(c);XR(F)
  • Actual
    • S(E);
    • Threat
      • QAB1(C)
    • Vars
      • K(d);S_FLIGHT,XS(E)::QAB(C)
      • K(d);S_FLIGHT,XR(F)::QAR2(C)
      • Q(c);SBLOCK,XR(F)::S(E)
      • Q(c);OGATE,XB(D)::R1(F),XQ(c)
      • P(e);SBLOCK,XR(F)::S(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).