MESON Chess Problem Database

Problem Display
PID: 87578 (1Q6/4rp2/1pB5/3P4/1K1kpR2/2pp4/3P4/3n1N2 w - - 0 1)

Klun, Joseph

Problemista, 1966

1Q6/4rp2/1pB5/3P4/1K1kpR2/2pp4/3P4/3n1N2

#2

7 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.Qxb6#
    • 1...Sb2
      • 2.dxc3#
    • 1...Sf2
      • 2.dxc3#
    • 1...Se3
      • 2.dxc3#
      • 2.dxe3#
  • Tries
    • 1.Se3?
      • threat
        • 2.Sf5#
      • 1...Sxe3
        • 2.dxc3#
      • 1...Re5
        • 2.Qxb6#
      • 1...f5
        • 2.Sxf5#
      • 1...Rc7!
    • 1.Rf5?
      • threat
        • 2.Qxb6#
      • 1...Rb7
        • 2.Qe5#
      • 1...b5
        • 2.Qb6#
      • 1...e3!
  • Keys
    • 1.Sg3!
      • threat
        • 2.Sf5#
      • 1...Rc7
        • 2.Rxe4#
      • 1...Re5
        • 2.Qxb6#
      • 1...Se3
        • 2.dxc3#
      • 1...f5
        • 2.Sxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • R(g);SBLOCK::QAB(G),XP(f)
    • S(a);N_GUARD::P(B),XP(b)
  • Tries
    • Try
      • S(A);
      • Threat
        • S(A)
      • Vars
        • S(a);N_GUARD,SBLOCK,XS(A)::P(B),XP(b)
        • R(g);SBLOCK::QAB(G),XP(f)
        • P(h);::S(A),XP(h)
      • Refutation
        • R(g);
    • Try
      • R(D);N_PINP(e)
      • Threat
        • QAB(G),XP(f)
      • Vars
        • R(g);N_GUARD::QAB1(G)
        • P(f);::QAB(G)
      • Refutation
        • P(e);
  • Actual
    • S(A);
    • Threat
      • S(A)
    • Vars
      • R(g);N_GUARD::R1(D),XP(e)
      • R(g);SBLOCK::QAB(G),XP(f)
      • S(a);N_GUARD,SBLOCK::P(B),XP(b)
      • P(h);::S(A),XP(h)
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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).