MESON Chess Problem Database

Problem Display
PID: 275196 (5B2/1n6/1r3pK1/1p1p1Q2/n2kN3/1Ppq1pN1/5P2/3R4 w - - 0 1)

Lyness, Robert Cranston

British Chess Magazine, 1935

5B2/1n6/1r3pK1/1p1p1Q2/n2kN3/1Ppq1pN1/5P2/3R4

#2

8 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Sd6
      • 2.Qxf6#
    • 1...dxe4
      • 2.Qxe4#
  • Keys
    • 1.Qf4!
      • threat
        • 2.Sf5#
      • 1...f5+
        • 2.Sf6#
      • 1...Qxd1
        • 2.Sc5#
      • 1...dxe4
        • 2.Qxe4#
      • 1...Qd2
        • 2.Sc5#
      • 1...Sd6
        • 2.Qxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(j);S_CUTR(h)::QAB(F),XP(i)
    • P(g);OGATE,XS(E)::QAR1(F),XP(g)
  • Actual
    • Q(F);P_SPINS(E)
    • Threat
      • S(D)
    • Vars
      • P(i);CHECK,N_PINS(E)::QAR(F)+S(E)
      • Q(b);N_PINS(E),N_SPINQ(b),XR(A)::QAR(F)+S(E)
      • P(g);OGATE,P_SPINP(g),XS(E)::QAR1(F),XP(g)
      • Q(b);N_PINS(E)::QAR(F)+S(E)
      • S(j);S_CUTR(h)::QAB(F),XP(i)
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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).