MESON Chess Problem Database

Problem Display
PID: 51520 (8/4K1pN/N5P1/3p4/3BkpPQ/Rn6/1P1n1P2/3R1B2 w - - 0 1)

Driver, John Edward

The Guardian, 1963

8/4K1pN/N5P1/3p4/3BkpPQ/Rn6/1P1n1P2/3R1B2

#2

12 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Kf3
      • 2.Sg5#
    • 1...Sb1
      • 2.Sg5#
    • 1...Sxf1
      • 2.Sg5#
    • 1...Sc4
      • 2.Sg5#
  • Tries
    • 1.Re1+?
      • 1...Kf3
        • 2.Sg5#
        • 2.Qh3#
      • 1...Kxd4!
  • Keys
    • 1.Qh5!
      • 1...Kf3
        • 2.Sg5#
      • 1...Kxd4
        • 2.Ra4#
      • 1...Sxf1
        • 2.Sg5#
      • 1...Sxd4
        • 2.Sc5#
      • 1...f3
        • 2.Qe5#
      • 1...Sb1
        • 2.Sg5#
      • 1...Sf3
        • 2.Qf5#
      • 1...Sc4
        • 2.Sg5#
      • 1...Sa1
        • 2.Qe5#
      • 1...Sc1
        • 2.Qe5#
      • 1...Sa5
        • 2.Qe5#
      • 1...Sc5
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • K(c);P_SPINS(b),S_FLIGHT::S(L)
    • S(a);::S(L)
    • S(a);XB(B)::S(L)
  • Tries
    • Try
      • R(A);CHECK
      • Refutation
        • K(c);P-FLIGHT,XB(F)
  • Actual
    • Q(H);
    • Vars
      • K(c);P_SPINS(b),S_FLIGHT::S(L)
      • K(c);OGATEB,P-FLIGHT,P_SPINS(a),XB(F)::R(E)
      • S(a);XB(B)::S(L)
      • S(b);N_GUARD,SBLOCK,XB(F)::S(I)
      • P(d);SBLOCK::QAR1(H)
      • S(a);::S(L)
      • S(a);SBLOCK::QAB1(H)
      • S(b);::QAR1(H)
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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).