MESON Chess Problem Database

Problem Display
PID: 51303 (b1rq4/3p1P2/r2p2R1/3nk3/1p2NpPB/1BpQpP2/P3K3/8 w - - 0 1)

Luke, R

Manchester Guardian, 1956

b1rq4/3p1P2/r2p2R1/3nk3/1p2NpPB/1BpQpP2/P3K3/8

#2

10 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Rac6
      • 2.Qxd5#
    • 1...Rcc6
      • 2.Qxd5#
    • 1...Sb6
      • 2.Qxd6#
    • 1...Sf6
      • 2.Rg5#
    • 1...Se7
      • 2.Bf6#
  • Tries
    • 1.Bf6+?
      • 1...Ke6
        • 2.Sg5#
      • 1...Sxf6
        • 2.Rg5#
      • 1...Qxf6!
  • Keys
    • 1.Sd2!
      • threat
        • 2.Qe4#
      • 1...Rc4
        • 2.Sxc4#
      • 1...Sb6
        • 2.Qxd6#
      • 1...Sf6
        • 2.Rg5#
      • 1...Sc7
        • 2.Sc4#
      • 1...Se7
        • 2.Bf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(g);S_CUTB(j)::QAR1(D),XS(e)
    • R(k);S_CUTB(j)::QAR1(D),XS(e)
    • S(e);OGATE::QAB1(D),XP(h)
    • S(e);S_CUTQ(l)::R(I)
    • S(e);N_GUARD,S_CUTQ(l)::B(H)
  • Tries
    • Try
      • B(H);CHECK
      • Vars
        • K(f);P-FLIGHT,P_SPINS(e)::S(F)
        • S(e);XB(H)::R(I)
      • Refutation
        • Q(l);XB(H)
  • Actual
    • S(F);
    • Threat
      • QAR1(D)
    • Vars
      • R(k);N_GUARD::S(F),XR(k)
      • S(e);OGATE::QAB1(D),XP(h)
      • S(e);SBLOCK,S_CUTQ(l)::R(I)
      • S(e);S_CUTR(k)::S(F)
      • S(e);N_GUARD,S_CUTQ(l)::B(H)
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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).