MESON Chess Problem Database

Problem Display
PID: 51201 (6Q1/5npp/5rkr/7R/4N2P/3Rn2K/2B1N3/8 w - - 0 1)

Gorton, JM

Manchester Guardian, 1954

6Q1/5npp/5rkr/7R/4N2P/3Rn2K/2B1N3/8

#2

8 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rf4
      • 2.Sxf4#
    • 1...Ra6
      • 2.Sf4#
    • 1...Rb6
      • 2.Sf4#
    • 1...Rc6
      • 2.Sf4#
    • 1...Rd6
      • 2.Sf4#
    • 1...Re6
      • 2.Sf4#
    • 1...Sf5
      • 2.Sf4#
    • 1...Se5
      • 2.Rg5#
    • 1...Sg5+
      • 2.Rxg5#
    • 1...Sd6
      • 2.Rg5#
    • 1...Sd8
      • 2.Rg5#
    • 1...Sh8
      • 2.Rg5#
  • Tries
    • 1.Qxf7+?
      • 1...Rxf7
        • 2.Rg5#
      • 1...Kxf7!
    • 1.Qxg7+?
      • 1...Kxh5
        • 2.S2g3#
        • 2.S4g3#
      • 1...Kxg7!
  • Keys
    • 1.Rd6!
      • threat
        • 2.Sf4#
      • 1...Sg5+
        • 2.Rxg5#
      • 1...Kxh5
        • 2.S4g3#
      • 1...Rxh5
        • 2.Rxf6#
      • 1...Sxd6
        • 2.Rg5#
      • 1...Sg2
        • 2.S4g3#
        • 2.Sxf6#
      • 1...Sd5
        • 2.S4g3#
        • 2.Sxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 10
  • Sets
    • R(b);N_GUARD::S(B),XR(b)
    • R(b);N_GUARD::S(B)
    • S(a);S_CUTR(b)::S(B)
    • S(e);N_GUARD::R1(G)
    • S(e);CHECK,N_GUARD::R1(G),XS(e)
  • Tries
    • Try
      • Q(H);CHECK,N_PINP(f),XS(e)
      • Vars
        • R(b);SBLOCK,XQ(H)::R1(G)
      • Refutation
        • K(c);S_FLIGHT,XQ(H)
    • Try
      • Q(H);CHECK,XP(f)
      • Refutation
        • K(c);P-FLIGHT,XQ(H)
  • Actual
    • R(C);P_PINR(b)
    • Threat
      • S(B)
    • Vars
      • S(e);CHECK,N_GUARD::R1(G),XS(e)
      • K(c);N_SPINP(f),N_SPINR(b),S_FLIGHT,XR(G)::S(E)
      • R(d);P_PINP(F),SBLOCK,XR(G)::R1(C),XR(b)
      • S(e);N_GUARD,N_SPINR(b),XR(C)::R1(G)
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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).