MESON Chess Problem Database

Problem Display
PID: 51334 (B7/2B5/4p3/4Np1K/3nrk2/3P4/1Qn5/5N2 w - - 0 1)

Driver, John Edward

8th Comm., BCPS Ring Ty., 1957

B7/2B5/4p3/4Np1K/3nrk2/3P4/1Qn5/5N2

#2

7 + 6

98 Manchester Guardian 1957
56 The Problemist 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Re1
      • 2.Sg6#
    • 1...Re2
      • 2.Sg6#
    • 1...Re3
      • 2.Sg6#
    • 1...Sa1
      • 2.Qh2#
    • 1...Se1
      • 2.Qh2#
    • 1...Sa3
      • 2.Qh2#
    • 1...Se3
      • 2.Qh2#
    • 1...Sb4
      • 2.Qh2#
    • 1...Sf3
      • 2.Sg6#
  • Tries
    • 1.Qc1+?
      • 1...Re3
        • 2.Sg6#
      • 1...Se3!
  • Keys
    • 1.Bd8!
      • 1...Kxe5
        • 2.Qb8#
      • 1...Rxe5
        • 2.Bg5#
      • 1...Re1
        • 2.Sg6#
      • 1...Re2
        • 2.Sg6#
      • 1...Re3
        • 2.Sg6#
      • 1...Sa1
        • 2.Qh2#
      • 1...Se1
        • 2.Qh2#
      • 1...Sa3
        • 2.Qh2#
      • 1...Se3
        • 2.Qh2#
      • 1...Sb4
        • 2.Qh2#
      • 1...Se2
        • 2.Bg5#
      • 1...Sb3
        • 2.Bg5#
      • 1...Sf3
        • 2.Sg6#
      • 1...Sb5
        • 2.Bg5#
      • 1...Sc6
        • 2.Bg5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • R(c);::B(F)+S(D),DCHECK
    • S(a);OGATE::QAB(B)
    • S(b);SBLOCK::B(F)+S(D),DCHECK
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • R(c);P_SPINR(c)::B(F)+S(D),DCHECK
      • Refutation
        • S(a);P_SPINS(a)
  • Actual
    • B(F);
    • Vars
      • K(d);OGATEB,P_SPINS(b),S_FLIGHT,XS(D)::QAB(B)
      • R(c);SBLOCK,XS(D)::B(F)
      • R(c);::S(D)
      • S(a);OGATE::QAB(B)
      • S(b);::B(F)
      • S(b);SBLOCK::S(D)
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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).