MESON Chess Problem Database

Problem Display
PID: 145222 (8/5Kp1/1N4P1/4k2p/6r1/2nP2n1/5Q2/2B3N1 w - - 0 1)

Anonymous

Source?, 1923

8/5Kp1/1N4P1/4k2p/6r1/2nP2n1/5Q2/2B3N1

#2

7 + 6

14868 Pirnie Collection 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Rf4+
      • 2.Qxf4#
    • 1...Rg5
      • 2.Qf4#
    • 1...Rxg6
      • 2.Qf4#
    • 1...Sb1
      • 2.Qc5#
    • 1...Sd1
      • 2.Qc5#
    • 1...Sa2
      • 2.Qc5#
    • 1...Sce2
      • 2.Qc5#
    • 1...Sb5
      • 2.Qc5#
  • Tries
    • 1.Sd7+?
      • 1...Kd5
        • 2.Qc5#
      • 1...Kd6!
  • Keys
    • 1.Qc5+!
      • 1...Sd5
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 8
  • Sets
    • R(c);CHECK,N_GUARD::QAB1(C),XR(c)
    • R(c);N_GUARD::QAB1(C)
    • R(c);N_GUARD,XP(F)::QAB1(C)
    • S(a);N_GUARD::QAR2(C)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(d);P-FLIGHT::QAR1(C)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • Q(C);CHECK
    • Vars
      • S(a);N_GUARD,P_SPINS(a)::QAR1(C),XS(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).