MESON Chess Problem Database

Problem Display
PID: 51455 (K7/5P1b/B2N4/n5R1/1B1kp1N1/5r2/3pP3/3n3Q w - - 0 1)

Peake, JL

The Guardian, 1961

K7/5P1b/B2N4/n5R1/1B1kp1N1/5r2/3pP3/3n3Q

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rf5
      • 2.Qxe4#
    • 1...Sc3
      • 2.Bc5#
    • 1...Se3
      • 2.Qa1#
    • 1...Sc4
      • 2.Sb5#
  • Tries
    • 1.e3+?
      • 1...Sxe3
        • 2.Qa1#
      • 1...Rxe3!
  • Keys
    • 1.Bc4!
      • threat
        • 2.Rd5#
      • 1...Sxc4
        • 2.Sb5#
      • 1...Rf5
        • 2.Qxe4#
      • 1...Bf5
        • 2.Qh8#
      • 1...Sc3
        • 2.Bc5#
      • 1...Se3
        • 2.Qa1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(c);OGATE::QAR1(A),XP(e)
    • S(a);SBLOCK::B(C)
    • S(a);OGATE::QAB(A)
    • S(f);SBLOCK::S(G)
  • Tries
    • Try
      • P(B);CHECK
      • Vars
        • S(a);OGATE,XP(B)::QAB(A)
      • Refutation
        • R(c);XP(B)
  • Actual
    • B(F);
    • Threat
      • R1(E)
    • Vars
      • S(f);SBLOCK,XB(F)::S(G)
      • R(c);OGATE::QAR1(A),XP(e)
      • B(g);OGATE::QAB(A)
      • S(a);SBLOCK::B(C)
      • S(a);OGATE::QAB(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).