MESON Chess Problem Database

Problem Display
PID: 146817 (1BK5/3RpQ2/6np/4p2r/1bB1k1P1/1R3N2/1prp4/3b2n1 w - - 0 1)

Driver, John Edward

The Problemist, 1956

1BK5/3RpQ2/6np/4p2r/1bB1k1P1/1R3N2/1prp4/3b2n1

#2

8 + 12

14868 Pirnie Collection 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc4+
      • 2.Qxc4#
    • 1...Rh1
      • 2.Qf5#
    • 1...Rh2
      • 2.Qf5#
    • 1...Rh3
      • 2.Qf5#
    • 1...Rh4
      • 2.Qf5#
    • 1...Rf5
      • 2.Qxf5#
    • 1...Bc5
      • 2.Bd5#
  • Tries
    • 1.Sg5+?
      • 1...hxg5
        • 2.Qf5#
      • 1...Rxg5!
    • 1.Qxg6+?
      • 1...Rf5
        • 2.Qxf5#
      • 1...Kf4!
  • Keys
    • 1.Ba7!
      • threat
        • 2.Re3#
      • 1...Rxc4+
        • 2.Qxc4#
      • 1...Rf5
        • 2.Qxf5#
      • 1...Rc3
        • 2.Sxd2#
      • 1...Bc3
        • 2.Bd3#
      • 1...Bc5
        • 2.Bd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(d);CHECK,OGATE,XB(C)::QAR2(F),XR(d)
    • R(i);N_GUARD::QAB1(F)
    • R(i);N_GUARD::QAB1(F),XR(i)
    • B(f);N_PINB(C)::B(C)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • P(k);XS(B)::QAB1(F)
      • Refutation
        • R(i);XS(B)
    • Try
      • Q(F);CHECK,XS(j)
      • Vars
        • R(i);N_GUARD,P_SPINR(i)::QAB1(F),XR(i)
      • Refutation
        • K(g);P-FLIGHT,P_SPINP(h)
  • Actual
    • B(G);
    • Threat
      • R1(A)
    • Vars
      • R(d);CHECK,OGATE,XB(C)::QAR2(F),XR(d)
      • R(i);N_GUARD::QAB1(F),XR(i)
      • R(d);N_GUARD,S_CUTB(f)::S(B),XP(e)
      • B(f);N_PINB(C)::B(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).