MESON Chess Problem Database

Problem Display
PID: 113359 (K4N1k/4R2B/2n5/8/8/8/4Q3/bb6 w - - 0 1)

Sobek, Karel

Tyden rozhlasu, 1941

K4N1k/4R2B/2n5/8/8/8/4Q3/bb6

#2

5 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ba2
      • 2.Sg6#
    • 1...Bg6
      • 2.Sxg6#
    • 1...Sd4
      • 2.Qe5#
  • Tries
    • 1.Qc4?
      • threat
        • 2.Qg8#
      • 1...Bxh7
        • 2.Rxh7#
      • 1...Ba2
        • 2.Sg6#
      • 1...Sxe7!
    • 1.Qg4?
      • threat
        • 2.Qg8#
      • 1...Bxh7
        • 2.Rxh7#
      • 1...Bg7
        • 2.Qxg7#
      • 1...Ba2
        • 2.Sg6#
      • 1...Bg6
        • 2.Sxg6#
      • 1...Sxe7!
    • 1.Qg2?
      • threat
        • 2.Qg8#
      • 1...Bxh7
        • 2.Rxh7#
      • 1...Bg7
        • 2.Qxg7#
      • 1...Ba2
        • 2.Sg6#
      • 1...Bg6
        • 2.Sxg6#
      • 1...Sxe7!
    • 1.Qe6?
      • threat
        • 2.Qg8#
      • 1...Bxh7
        • 2.Rxh7#
      • 1...Ba2
        • 2.Sg6#
      • 1...Sxe7!
  • Keys
    • 1.Qa2!
      • threat
        • 2.Qg8#
      • 1...Bxa2
        • 2.Sg6#
      • 1...Bxh7
        • 2.Rxh7#
      • 1...Sxe7
        • 2.Qxa1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(b);N_GUARD::S(E)
    • B(b);N_GUARD::S(E),XB(b)
    • S(c);N_GUARD,S_CUTB(a)::QAB(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • B(b);OGATE,XB(C)::R1(B),XB(b)
        • B(b);N_GUARD::S(E)
      • Refutation
        • S(c);XR(B)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • B(b);OGATE,XB(C)::R1(B),XB(b)
        • B(a);N_GUARD::QAB1(A),XB(a)
        • B(b);N_GUARD::S(E)
        • B(b);N_GUARD::S(E),XB(b)
      • Refutation
        • S(c);XR(B)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • B(b);OGATE,XB(C)::R1(B),XB(b)
        • B(a);N_GUARD::QAB1(A),XB(a)
        • B(b);N_GUARD::S(E)
        • B(b);N_GUARD::S(E),XB(b)
      • Refutation
        • S(c);XR(B)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • B(b);OGATE,XB(C)::R1(B),XB(b)
        • B(b);N_GUARD::S(E)
      • Refutation
        • S(c);XR(B)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • B(b);N_GUARD,XQ(A)::S(E)
      • B(b);OGATE,XB(C)::R1(B),XB(b)
      • S(c);N_GUARD,XR(B)::QAB(A),XB(a)
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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).