MESON Chess Problem Database

Problem Display
PID: 182612 (3K4/B4p1n/R3pR2/4kP2/2P5/p2P3N/Q5N1/3n4 w - - 0 1)

Howard, David M

Problem Observer, 2015

3K4/B4p1n/R3pR2/4kP2/2P5/p2P3N/Q5N1/3n4

#2

10 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Sf2
      • 2.Qa1#
    • 1...Se3
      • 2.Qa1#
  • Tries
    • 1.Qa1+?
      • 1...Sc3
        • 2.Qxc3#
      • 1...Sb2!
  • Keys
    • 1.Se3!
      • threat
        • 2.Sg4#
      • 1...Kxf6
        • 2.Bd4#
      • 1...Sxe3
        • 2.Qa1#
      • 1...Sxf6
        • 2.Qh2#
      • 1...exf5
        • 2.Rxf5#
      • 1...Sf2
        • 2.Qa1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAB(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB(A),XS(a)
      • Refutation
        • S(a);P_SPINS(a)
  • Actual
    • S(B);
    • Threat
      • S(B)
    • Vars
      • K(c);P_SPINP(d),S_FLIGHT,XR(H)::B(I)
      • S(a);N_GUARD,XS(B)::QAB(A)
      • S(f);SBLOCK,XR(H)::QAB(A)
      • P(d);OGATE,XP(F)::R1(H),XP(d)
      • S(a);N_GUARD::QAB(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).