MESON Chess Problem Database

Problem Display
PID: 67873 (3N4/6BK/1p2r1N1/Rbbk4/3p1Q1R/1P2nP2/3r2p1/8 w - - 0 1)

Gunn, Robert Ivan

Chess, 1948

3N4/6BK/1p2r1N1/Rbbk4/3p1Q1R/1P2nP2/3r2p1/8

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Re4
      • 2.fxe4#
    • 1...Re5
      • 2.Qxe5#
    • 1...Rc6
      • 2.Qe5#
    • 1...Rd6
      • 2.Se7#
      • 2.Qe5#
      • 2.Qe4#
    • 1...Rf6
      • 2.Qe5#
    • 1...Rxg6
      • 2.Qe5#
    • 1...Bd3
      • 2.Qxd4#
  • Tries
    • 1.Rh5+?
      • 1...Re5
        • 2.Qxe5#
      • 1...Sf5!
  • Keys
    • 1.Qc7!
      • threat
        • 2.Sf4#
      • 1...Rxg6
        • 2.Qe5#
      • 1...Re4
        • 2.fxe4#
      • 1...Rf6
        • 2.Qe5#
      • 1...Bd3
        • 2.Rxd4#
      • 1...Bd6
        • 2.Qc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • R(i);OGATE::P(B),XR(i)
    • R(i);N_GUARD::QAR1(C),XR(i)
    • R(i);N_GUARD::QAR1(C)
    • R(i);N_GUARD,XS(F)::QAR1(C)
    • B(e);P_PINS(F),P_SPINB(f),S_CUTR(a)::QAR1(C),XP(d)
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • R(i);N_GUARD,P_SPINR(i)::QAR1(C),XR(i)
      • Refutation
        • S(c);P_SPINS(c)
  • Actual
    • Q(C);
    • Threat
      • S(F)
    • Vars
      • R(i);N_GUARD,XS(F)::QAR1(C)
      • R(i);OGATE::P(B),XR(i)
      • R(i);N_GUARD::QAR1(C)
      • B(e);P_PINS(F),P_SPINB(f),S_CUTR(a)::R1(D),XP(d)
      • B(f);P_SPINB(e),S_CUTR(i)::QAB1(C)
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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).