MESON Chess Problem Database

Problem Display
PID: 148153 (2Q5/8/6p1/p4q2/1n6/K2RRB1k/1Pp3Np/5n1N w - - 0 1)

Diana

Brisbane Courier, 1915

2Q5/8/6p1/p4q2/1n6/K2RRB1k/1Pp3Np/5n1N

#2

8 + 8

14868 Pirnie Collection 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Qg4
      • 2.Qxg4#
    • 1...Qe6
      • 2.Qxe6#
      • 2.Qh8#
    • 1...Qd7
      • 2.Qxd7#
    • 1...Sg3
      • 2.Sf2#
  • Tries
    • 1.Rd4?
      • threat
        • 2.Rh4#
      • 1...Qg4
        • 2.Qxg4#
      • 1...g5!
    • 1.Rd8?
      • threat
        • 2.Rh8#
      • 1...Sg3
        • 2.Sf2#
      • 1...Qxc8!
    • 1.Re4?
      • threat
        • 2.Rh4#
      • 1...Qg4
        • 2.Qxg4#
      • 1...g5!
  • Keys
    • 1.Rd7!
      • threat
        • 2.Rh7#
      • 1...Qd3+
        • 2.Rdxd3#
      • 1...Qxd7
        • 2.Qxd7#
      • 1...Qxf3
        • 2.Rd2#
      • 1...Qf7
        • 2.Rxf7#
      • 1...Sg3
        • 2.Sf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • Q(g);OGATE::QAB1(H),XQ(g)
    • Q(g);OGATEB::QAB(H),XQ(g)
    • S(a);SBLOCK::S(A)
  • Tries
    • Try
      • R(E);
      • Threat
        • R1(E)
      • Vars
        • Q(g);OGATE::QAB1(H),XQ(g)
      • Refutation
        • P(h);
    • Try
      • R(E);
      • Threat
        • R(E)
      • Vars
        • S(a);SBLOCK::S(A)
      • Refutation
        • Q(g);N_SPINQ(g),XQ(H)
    • Try
      • R(F);
      • Threat
        • R1(F)
      • Vars
        • Q(g);OGATE::QAB1(H),XQ(g)
      • Refutation
        • P(h);
  • Actual
    • R(E);N_PINQ(g)
    • Threat
      • R(E)
    • Vars
      • Q(g);CHECK,OGATEB::QAB(H)+R(E),XQ(g)
      • Q(g);OGATE,P_SPINQ(g),XR(E)::QAB(H),XQ(g)
      • Q(g);OGATEB,P_PINR(F),P_SPINQ(g),XB(G)::QAB(H)+R(E)
      • Q(g);OGATEB::QAB(H)+R(E),XQ(g)
      • S(a);SBLOCK::S(A)
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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).