MESON Chess Problem Database

Problem Display
PID: 232798 (7Q/5K2/3RrPP1/2PPkN2/3pppP1/8/8/8 w - - 0 1)

Hultberg, Gustav Herbert

Freie Presse, 1988

7Q/5K2/3RrPP1/2PPkN2/3pppP1/8/8/8

#2

9 + 5

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf6+
      • 2.Qxf6#
    • 1...Re7+
      • 2.fxe7#
    • 1...Re8
      • 2.Qxe8#
    • 1...f3
      • 2.Qh2#
  • Tries
    • 1.Qd8?
      • threat
        • 2.Rxe6#
      • 1...Rxf6+
        • 2.Qxf6#
      • 1...Re7+
        • 2.Qxe7#
      • 1...Rxd6
        • 2.Qxd6#
      • 1...Re8
        • 2.Qxe8#
      • 1...f3!
  • Keys
    • 1.Se7!
      • threat
        • 2.Sc6#
        • 2.Rxe6#
        • 2.Qh5#
      • 1...Rxf6+
        • 2.Qxf6#
      • 1...Rxe7+
        • 2.fxe7#
      • 1...Rxd6
        • 2.Qh5#
      • 1...d3
        • 2.Sc6#
      • 1...e3
        • 2.Rxe6#
      • 1...f3
        • 2.Qh2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(e);CHECK,OGATE,P_SPINR(e),XP(F)::QAB1(I),XR(e)
    • R(e);CHECK,OGATE::QAB(I)+P(F),XR(e)
    • R(e);OGATEB::QAR(I),XR(e)
    • P(c);OGATEB::QAB(I)
  • Tries
    • Try
      • Q(I);
      • Threat
        • R1(E),XR(e)
      • Vars
        • R(e);CHECK,OGATE,XP(F)::QAB1(I),XR(e)
        • R(e);CHECK,OGATEB::QAR2(I),XR(e)
        • R(e);OGATE,XR(E)::QAB1(I),XR(e)
        • R(e);OGATEB::QAR(I),XR(e)
      • Refutation
        • P(c);
  • Actual
    • S(D);
    • Threat
      • DUALS(3)
    • Vars
      • R(e);CHECK,OGATE,P_SPINR(e),XP(F)::QAB1(I),XR(e)
      • R(e);CHECK,OGATE,XS(D)::QAB(I)+P(F),XR(e)
      • R(e);XR(E)::QAR(I)
      • P(a);::S(D)
      • P(b);::R1(E),XR(e)
      • P(c);OGATEB::QAB(I)
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).