MESON Chess Problem Database

Problem Display
PID: 34791 (3B4/5K2/5NB1/4p3/4N2k/3n1R1p/5q1p/4Q1b1 w - - 0 1)

Lebedev, Aleksandr N

De Problemist, 1929

3B4/5K2/5NB1/4p3/4N2k/3n1R1p/5q1p/4Q1b1

#2

7 + 7

14868 Pirnie Collection 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Qg3
      • 2.Qxg3#
  • Keys
    • 1.Rg3!
      • threat
        • 2.Rg4#
      • 1...Qa7+
        • 2.Sd7#
      • 1...Qa2+
        • 2.Sd5#
      • 1...Qxf6+
        • 2.Bxf6#
      • 1...Qxg3
        • 2.Qxg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(b);OGATE::QAB1(A),XQ(b)
  • Actual
    • R(B);N_PINQ(b),P_SPINS(D)
    • Threat
      • R1(B)
    • Vars
      • Q(b);CHECK,N_PINS(D)::B(G)+S(D)
      • Q(b);CHECK,OGATE,P_SPINQ(b),XS(D)::B(G),XQ(b)
      • Q(b);N_PINS(D),OGATE,P_SPINQ(b),XR(B)::QAB1(A),XQ(b)
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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).