MESON Chess Problem Database

Problem Display
PID: 110096 (B6n/3K4/8/2p1k3/8/5Q1n/3N2N1/8 w - - 0 1)

Kisis, Imants J

Sachove umeni (Ceskoslovensky sach), 1985

B6n/3K4/8/2p1k3/8/5Q1n/3N2N1/8

#2

5 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qe3#
    • 1...Sg1
      • 2.Qf4#
    • 1...Sf2
      • 2.Qf4#
    • 1...Sf4
      • 2.Qxf4#
    • 1...Sg5
      • 2.Qf4#
  • Tries
    • 1.Ke7?
      • threat
        • 2.Qe4#
        • 2.Qd5#
        • 2.Qf6#
      • 1...Kd4
        • 2.Qe3#
      • 1...Sf4
        • 2.Qe4#
        • 2.Qxf4#
      • 1...Sf2
        • 2.Qd5#
        • 2.Qf4#
        • 2.Qf6#
      • 1...Sg5
        • 2.Qd5#
        • 2.Qf4#
        • 2.Qf6#
      • 1...Sg6+!
    • 1.Se4?
      • threat
        • 2.Qf6#
      • 1...Kd4
        • 2.Qc3#
      • 1...Sf4!
    • 1.Qf2?
      • threat
        • 2.Sc4#
      • 1...Sf4
        • 2.Qxf4#
      • 1...c4
        • 2.Sxc4#
      • 1...Sxf2!
  • Keys
    • 1.Be4!
      • threat
        • 2.Qc3#
      • 1...Kd4
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • K(c);S_FLIGHT::QAB1(C)
    • S(a);N_GUARD::QAB1(C)
    • S(a);N_GUARD::QAB1(C),XS(a)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Threat
        • DUALS(3)
      • Vars
        • K(c);S_FLIGHT::QAB1(C)
      • Refutation
        • S(d);CHECK
    • Try
      • S(A);
      • Threat
        • QAB1(C)
      • Vars
        • K(c);S_FLIGHT::QAB1(C)
      • Refutation
        • S(a);
    • Try
      • Q(C);
      • Threat
        • S(A)
      • Vars
        • S(a);N_GUARD::QAB1(C),XS(a)
        • P(b);::S(A),XP(b)
      • Refutation
        • S(a);XQ(C)
  • Actual
    • B(E);
    • Threat
      • QAB(C)
    • Vars
      • K(c);S_FLIGHT::QAB(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).