MESON Chess Problem Database

Problem Display
PID: 67541 (2Kn4/8/Q3p3/2Nkbr1R/1Ppp2N1/3r1P2/7q/3R3B w - - 0 1)

Lindstrom, Ismo

Myllyniemi, Matti Arvo

Schach-Echo, 1982

2Kn4/8/Q3p3/2Nkbr1R/1Ppp2N1/3r1P2/7q/3R3B

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Re3
      • 2.Sxe3#
    • 1...Rdxf3
      • 2.Se3#
    • 1...Rfxf3
      • 2.Sf6#
    • 1...Rf4
      • 2.Rxe5#
    • 1...Rf6
      • 2.Sxf6#
    • 1...Sb7
      • 2.Qxe6#
    • 1...Sf7
      • 2.Qxe6#
  • Keys
    • 1.Se4!
      • threat
        • 2.Qb5#
      • 1...Rdxf3
        • 2.Sc3#
      • 1...Rfxf3
        • 2.Sef6#
      • 1...Bd6
        • 2.Sef6#
      • 1...Sb7
        • 2.Qxb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • R(b);N_GUARD,P_SPINP(d)::S(E),XR(b)
    • R(b);N_GUARD,P_SPINP(d),P_SPINR(b),XP(C)::S(E)
    • R(g);N_GUARD,P_SPINB(f),P_SPINR(g),XP(C)::S(E)
    • R(g);OGATE,P_SPINB(f)::R1(G),XB(f)
    • R(g);N_GUARD,P_SPINB(f)::S(E),XR(g)
    • S(i);N_GUARD::QAB1(H),XP(h)
  • Actual
    • S(F);
    • Threat
      • QAR2(H)
    • Vars
      • R(b);N_GUARD,P_SPINP(d),XP(C)::S(F)
      • R(g);N_GUARD,P_SPINB(f),XP(C)::S(F)
      • B(f);N_GUARD,P_SPINR(g)::S(F)
      • S(i);N_GUARD::QAB(H),XS(i)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).