MESON Chess Problem Database

Problem Display
PID: 129821 (4k2r/8/1KP3Pb/5N2/5pn1/2Q5/8/8 w - - 0 1)

Svozilek, Dalibor

Straz lidu, 1950

4k2r/8/1KP3Pb/5N2/5pn1/2Q5/8/8

#2

5 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kf8
      • 2.Qxh8#
    • 1...Bg5
      • 2.Qxh8#
  • Tries
    • 1.Qa5?
      • threat
        • 2.Qa8#
      • 1...Kd8
        • 2.Qa8#
      • 1...Kf8
        • 2.Qa8#
      • 1...Bg5!
    • 1.Qe5+?
      • 1...Kd8
        • 2.Qb8#
      • 1...Kf8
        • 2.Qb8#
        • 2.Qxh8#
      • 1...Sxe5!
    • 1.Qa3?
      • threat
        • 2.Qe7#
        • 2.Qa8#
      • 1...Kd8
        • 2.Qa8#
      • 1...Rh7
        • 2.Qa8#
      • 1...Bf8
        • 2.Qa8#
      • 1...Bg5!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Qa8#
      • 1...Kd8
        • 2.Qa8#
      • 1...Kf8
        • 2.Qxh8#
        • 2.Qa8#
      • 1...Bg5
        • 2.Qxh8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(d);P-FLIGHT::QAR2(A),XR(e)
    • B(c);N_GUARD::QAR(A),XR(e)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • K(d);P-FLIGHT::QAR(A)
      • Refutation
        • B(c);
    • Try
      • Q(A);CHECK
      • Vars
        • K(d);P-FLIGHT::QAR2(A)
      • Refutation
        • S(b);XQ(A)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(d);P-FLIGHT::QAR(A)
        • R(e);::QAR(A)
        • B(c);SBLOCK::QAR(A)
      • Refutation
        • B(c);
  • Actual
    • Q(A);
    • Threat
      • QAR(A)
    • Vars
      • K(d);P-FLIGHT::QAR(A)
      • B(c);N_GUARD::QAR(A),XR(e)
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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).