MESON Chess Problem Database

Problem Display
PID: 117003 (K4Q2/2p2N2/2p5/p4np1/4Pk1p/3Pp2R/1b2B3/q5r1 w - - 0 1)

Kiss, Janos

Na Smenu! TT, 1962

K4Q2/2p2N2/2p5/p4np1/4Pk1p/3Pp2R/1b2B3/q5r1

#2

7 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rg4
      • 2.Rf3#
  • Tries
    • 1.Se5?
      • threat
        • 2.Sg6#
        • 2.Qxf5#
      • 1...Bxe5
        • 2.Qxf5#
      • 1...g4
        • 2.Qxf5#
      • 1...Kxe5!
    • 1.Sh8?
      • threat
        • 2.Sg6#
        • 2.Qxf5#
      • 1...Bxh8
        • 2.Qxf5#
      • 1...g4
        • 2.Qxf5#
      • 1...Bf6
        • 2.Sg6#
      • 1...Ke5!
    • 1.Qc5?
      • threat
        • 2.Qxf5#
      • 1...Sg3
        • 2.Qxg5#
      • 1...Sd4
        • 2.Qe5#
      • 1...Sd6
        • 2.Qxe3#
      • 1...Sh6
        • 2.Qxe3#
      • 1...Se7
        • 2.Qxe3#
      • 1...Sg7
        • 2.Qxe3#
      • 1...Be5!
  • Keys
    • 1.Qc8!
      • threat
        • 2.Qxf5#
      • 1...Sg3
        • 2.Qg4#
      • 1...Sd4
        • 2.Qxc7#
      • 1...Sd6
        • 2.Rf3#
      • 1...Sh6
        • 2.Rf3#
      • 1...Se7
        • 2.Rf3#
      • 1...Sg7
        • 2.Rf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • R(b);SBLOCK::R1(C)
  • Tries
    • Try
      • S(E);P_PINS(h)
      • Threat
        • DUALS(2)
      • Vars
        • B(c);XS(E)::QAR1(G),XS(h)
        • P(i);::QAR1(G),XS(h)
      • Refutation
        • K(e);N_SPINS(h),S_FLIGHT,XS(E)
    • Try
      • S(E);P_PINS(h)
      • Threat
        • DUALS(2)
      • Vars
        • B(c);XS(E)::QAR1(G),XS(h)
        • P(i);::QAR1(G),XS(h)
        • B(c);N_SPINS(h)::S(E)
      • Refutation
        • K(e);N_SPINS(h),S_FLIGHT
    • Try
      • Q(G);
      • Threat
        • QAR1(G),XS(h)
      • Vars
        • S(h);OGATE::QAB1(G),XP(i)
        • S(h);S_CUTB(c)::QAB1(G)
        • S(h);N_GUARD::QAB1(G),XP(d)
      • Refutation
        • B(c);
  • Actual
    • Q(G);
    • Threat
      • QAR1(G),XS(h)
    • Vars
      • S(h);OGATE::QAR1(G)
      • S(h);N_GUARD,S_CUTB(c)::QAB(G),XP(k)
      • S(h);::R1(C)
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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).