MESON Chess Problem Database

Problem Display
PID: 51315 (2N2b1n/5pR1/3p4/3K1kp1/2pQ1p2/2p4P/2N5/8 w - - 0 1)

Sumner, Christopher Richard Benson

Manchester Guardian, 1957

2N2b1n/5pR1/3p4/3K1kp1/2pQ1p2/2p4P/2N5/8

#2

6 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Be7
      • 2.Sxe7#
    • 1...Bxg7
      • 2.Se7#
    • 1...Sg6
      • 2.Rxf7#
    • 1...f3
      • 2.Se3#
    • 1...g4
      • 2.hxg4#
    • 1...f6
      • 2.Qe4#
  • Tries
    • 1.Rg8?
      • 1...Bg7
        • 2.Se7#
      • 1...Bh6
        • 2.Sxd6#
        • 2.Se7#
      • 1...Be7
        • 2.Sxe7#
      • 1...f3
        • 2.Se3#
      • 1...g4
        • 2.hxg4#
      • 1...f6
        • 2.Qe4#
      • 1...Sg6!
  • Keys
    • 1.Qxc3!
      • 1...Bxg7
        • 2.Se7#
      • 1...f3
        • 2.Qxf3#
      • 1...Be7
        • 2.Sxe7#
      • 1...Sg6
        • 2.Rxf7#
      • 1...g4
        • 2.hxg4#
      • 1...f6
        • 2.Sd4#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • B(h);N_GUARD::S(F),XB(h)
    • B(h);N_GUARD,XR(E)::S(F)
    • S(i);N_GUARD,SBLOCK::R(E),XP(g)
    • P(c);N_GUARD::S(A)
    • P(e);OGATE::P(B),XP(e)
    • P(g);SBLOCK::QAB1(C)
  • Tries
    • Try
      • R(E);
      • Vars
        • B(h);N_GUARD::S(F)
        • B(h);N_GUARD::S(F),XB(h)
        • P(c);N_GUARD::S(A)
        • P(e);OGATE::P(B),XP(e)
        • P(g);SBLOCK::QAB1(C)
      • Refutation
        • S(i);
  • Actual
    • Q(C);XP(a)
    • Vars
      • B(h);N_GUARD,XR(E)::S(F)
      • P(c);OGATEB::QAR2(C),XP(c)
      • B(h);N_GUARD::S(F),XB(h)
      • S(i);N_GUARD,SBLOCK::R(E),XP(g)
      • P(e);OGATE::P(B),XP(e)
      • P(g);SBLOCK::S(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).