MESON Chess Problem Database

Problem Display
PID: 236218 (b5R1/6Np/6pr/3Q1pnR/6k1/5pPn/6PP/K7 w - - 0 1)

Papack, Daniel

Variantim, 2017

b5R1/6Np/6pr/3Q1pnR/6k1/5pPn/6PP/K7

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Se4
      • 2.gxh3#
    • 1...Se6
      • 2.gxf3#
      • 2.gxh3#
    • 1...Sf7
      • 2.gxf3#
      • 2.gxh3#
    • 1...gxh5
      • 2.Qxf5#
  • Tries
    • 1.Qxf3+?
      • 1...Sxf3
        • 2.gxh3#
      • 1...Bxf3!
  • Keys
    • 1.Se8!
      • threat
        • 2.Sf6#
      • 1...Kxh5
        • 2.Sf6#
      • 1...gxh5
        • 2.gxf3#
      • 1...Se4
        • 2.Qxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(e);N_GUARD::P(B),XS(b)
    • P(f);N_GUARD,XR(F)::QAB1(E),XP(d)
  • Tries
    • Try
      • Q(E);CHECK,XP(a)
      • Vars
        • S(e);SBLOCK,XQ(E)::P(B),XS(b)
      • Refutation
        • B(i);XQ(E)
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • K(c);S_FLIGHT,XR(F)::S(G)
      • P(f);P_SPINS(e),SBLOCK,XR(F)::P(B),XP(a)
      • S(e);P_SPINP(f)::QAB1(E),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).