MESON Chess Problem Database

Problem Display
PID: 51436 (5B2/Q1p5/rr1p3K/nN1R1p2/1pp4n/2PPk1P1/R7/4N3 w - - 0 1)

Driver, John Edward

The Guardian, 1960

5B2/Q1p5/rr1p3K/nN1R1p2/1pp4n/2PPk1P1/R7/4N3

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Sf3
      • 2.Sg2#
    • 1...c5
      • 2.Qe7#
    • 1...c6
      • 2.Qe7#
  • Tries
    • 1.Sxd6?
      • threat
        • 2.Re5#
      • 1...cxd6
        • 2.Qe7#
      • 1...Sf3
        • 2.Sg2#
      • 1...Sg6
        • 2.Sxf5#
      • 1...Sc6
        • 2.Sxc4#
      • 1...bxc3!
  • Keys
    • 1.Bxd6!
      • threat
        • 2.Re5#
      • 1...cxd6
        • 2.Qe7#
      • 1...Sf3
        • 2.Sg2#
      • 1...Sg6
        • 2.Bc5#
      • 1...Sc6
        • 2.Bf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • S(d);N_GUARD,SBLOCK::S(A)
    • P(j);N_SPINR(h),OGATE::QAR(I)
    • P(j);OGATE::QAR(I)
  • Tries
    • Try
      • S(F);P_SPINS(F),XP(i)
      • Threat
        • R(G)
      • Vars
        • P(j);OGATE,XS(F)::QAR(I)
        • S(d);N_GUARD,SBLOCK::S(A)
        • S(d);N_PINS(F)::S(F),XP(f)
        • S(e);N_PINS(F)::S(F),XP(c)
      • Refutation
        • P(b);XP(C)
  • Actual
    • B(J);P_SPINB(J),XP(i)
    • Threat
      • R(G)
    • Vars
      • P(j);OGATE,XB(J)::QAR(I)
      • S(d);N_GUARD,SBLOCK::S(A)
      • S(d);N_PINB(J)::B(J)
      • S(e);N_PINB(J)::B(J)
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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).