MESON Chess Problem Database

Problem Display
PID: 230411 (8/8/7n/2Q5/4R3/3P1k2/6n1/7K w - - 0 1)

Tungler, Arno

Deutsche Schachzeitung, 1978

8/8/7n/2Q5/4R3/3P1k2/6n1/7K

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Se1
      • 2.Qe3#
    • 1...Se3
      • 2.Qxe3#
    • 1...Sh4
      • 2.Qe3#
  • Tries
    • 1.Qg5?
      • threat
        • 2.Qxg2#
      • 1...Kf2
        • 2.Qxg2#
      • 1...Se3
        • 2.Qxe3#
      • 1...Se1
        • 2.Qe3#
        • 2.Qf4#
      • 1...Sf4
        • 2.Qxf4#
      • 1...Sh4
        • 2.Qe3#
        • 2.Qf4#
      • 1...Sg4!
  • Keys
    • 1.Qg1!
      • threat
        • 2.Qxg2#
      • 1...Kg3
        • 2.Qxg2#
      • 1...Se1
        • 2.Qe3#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sf4
        • 2.Re3#
      • 1...Sh4
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAR1(D)
    • S(a);N_GUARD::QAR1(D),XS(a)
  • Tries
    • Try
      • Q(D);
      • Threat
        • QAB1(D),XS(a)
      • Vars
        • K(b);P-FLIGHT::QAR1(D),XS(a)
        • S(a);N_GUARD::QAR1(D),XS(a)
      • Refutation
        • S(c);
  • Actual
    • Q(D);
    • Threat
      • QAB1(D),XS(a)
    • Vars
      • K(b);P-FLIGHT,P_SPINS(a)::QAR1(D),XS(a)
      • S(a);N_GUARD::QAR1(D)
      • S(a);N_GUARD::QAR1(D),XS(a)
      • S(a);N_GUARD,SBLOCK::R1(C)
HTML5 logo

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).