MESON Chess Problem Database

Problem Display
PID: 228252 (4r3/2N5/B1pp4/B1kppR2/4p3/P3P3/n1N5/5K2 w - - 0 1)

Howard, David M

Problem Observer, 2020

4r3/2N5/B1pp4/B1kppR2/4p3/P3P3/n1N5/5K2

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Re6
      • 2.Sxe6#
    • 1...Ra8
      • 2.Se6#
    • 1...Rb8
      • 2.Se6#
    • 1...Rc8
      • 2.Se6#
    • 1...Rd8
      • 2.Se6#
    • 1...Rf8
      • 2.Se6#
    • 1...Rg8
      • 2.Se6#
    • 1...Rh8
      • 2.Se6#
    • 1...Sb4
      • 2.axb4#
    • 1...d4
      • 2.exd4#
  • Tries
    • 1.Sa1?
      • threat
        • 2.Sb3#
      • 1...Rb8
        • 2.Se6#
      • 1...Sc1!
    • 1.Bd3?
      • threat
        • 2.Sa6#
      • 1...Ra8
        • 2.Se6#
      • 1...Sb4
        • 2.axb4#
      • 1...d4
        • 2.exd4#
      • 1...exd3!
  • Keys
    • 1.Be2!
      • threat
        • 2.Sa6#
      • 1...Ra8
        • 2.Se6#
      • 1...Sb4
        • 2.axb4#
      • 1...d4
        • 2.exd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 7
  • Sets
    • R(h);N_GUARD::S(H),XR(h)
    • R(h);N_GUARD::S(H)
    • R(h);N_GUARD,P_PINR(F)::S(H)
    • S(a);OGATE::P(C),XS(a)
    • P(d);OGATE,P_SPINP(e)::P(D),XP(d)
  • Tries
    • Try
      • S(B);
      • Threat
        • S(B)
      • Vars
        • R(h);N_GUARD::S(H)
      • Refutation
        • S(a);
    • Try
      • B(G);
      • Threat
        • S(H)
      • Vars
        • R(h);N_GUARD::S(H)
        • S(a);OGATE::P(C),XS(a)
        • P(d);OGATE,P_SPINP(e)::P(D),XP(d)
      • Refutation
        • P(b);XB(G)
  • Actual
    • B(G);
    • Threat
      • S(H)
    • Vars
      • R(h);N_GUARD::S(H)
      • S(a);OGATE::P(C),XS(a)
      • P(d);OGATE,P_SPINP(e)::P(D),XP(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).