MESON Chess Problem Database

Problem Display
PID: 51484 (3N4/6n1/1p2NR2/nrPk1p2/1p3R2/1pB5/8/QK6 w - - 0 1)

Rendall, JL

The Guardian, 1961

3N4/6n1/1p2NR2/nrPk1p2/1p3R2/1pB5/8/QK6

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sc4
      • 2.Qa8#
    • 1...Sh5
      • 2.R6xf5#
    • 1...Sxe6
      • 2.R6xf5#
    • 1...Se8
      • 2.R6xf5#
    • 1...bxc5
      • 2.Sc7#
  • Tries
    • 1.Qb2?
      • threat
        • 2.Qd2#
        • 2.Qg2#
      • 1...Rxc5
        • 2.Qd2#
      • 1...Sxe6
        • 2.R6xf5#
      • 1...bxc5
        • 2.Sc7#
        • 2.Qd2#
      • 1...Sc6
        • 2.Qg2#
        • 2.Qxb3#
      • 1...Sc4
        • 2.Qg2#
      • 1...bxc3!
  • Keys
    • 1.Qa4!
      • 1...Rxc5
        • 2.Qd7#
      • 1...Sxe6
        • 2.R6xf5#
      • 1...bxc3
        • 2.Qd4#
      • 1...bxc5
        • 2.Sc7#
      • 1...Sc6
        • 2.Qxb3#
      • 1...Sc4
        • 2.Qa8#
      • 1...Sb7
        • 2.Qxb3#
      • 1...Sh5
        • 2.R6xf5#
      • 1...Se8
        • 2.R6xf5#
      • 1...b2
        • 2.Qd1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(c);OGATE::QAB(A)
    • S(h);N_GUARD::R(G),XP(f)
    • S(h);N_GUARD,XS(F)::R(G),XP(f)
    • P(g);SBLOCK,XP(E)::S(F)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(d);XP(E)::QAR(A)
        • S(h);N_GUARD,XS(F)::R(G),XP(f)
        • S(c);::QAB(A)
      • Refutation
        • P(b);XB(C)
  • Actual
    • Q(A);
    • Vars
      • R(d);OGATE,XP(E)::QAR2(A)
      • S(h);N_GUARD,XS(F)::R(G),XP(f)
      • P(b);OGATE,XB(C)::QAR1(A)
      • P(g);SBLOCK,XP(E)::S(F)
      • S(c);N_GUARD::QAB(A),XP(a)
      • S(c);OGATE::QAB(A)
      • S(h);N_GUARD::R(G),XP(f)
      • P(a);OGATE::QAR(A)
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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).