MESON Chess Problem Database

Problem Display
PID: 187610 (8/1B1p1r2/8/2QN2p1/4k3/2p2p2/5K2/8 w - - 0 1)

Kralicek, Jaroslav

Besedy casu, 1909

8/1B1p1r2/8/2QN2p1/4k3/2p2p2/5K2/8

#2

4 + 6

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rf5
      • 2.Qe3#
  • Tries
    • 1.Se3+?
      • 1...Kd3
        • 2.Qd6#
        • 2.Qd5#
      • 1...Kf4
        • 2.Qd4#
        • 2.Qd6#
      • 1...d5!
    • 1.Se7+?
      • 1...Kf4
        • 2.Qd4#
      • 1...d5
        • 2.Qe3#
      • 1...Kd3!
  • Keys
    • 1.Qd6!
      • threat
        • 2.Se3#
        • 2.Se7#
      • 1...Kd3
        • 2.Se3#
      • 1...Kd4
        • 2.Se3#
        • 2.Sb6#
      • 1...Kf5
        • 2.Se3#
      • 1...Rf5
        • 2.Sxc3#
        • 2.Sf6#
      • 1...Re7
        • 2.Se3#
        • 2.Sxe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(f);SBLOCK::QAR1(B)
  • Tries
    • Try
      • S(C);CHECK
      • Refutation
        • P(e);P_SPINP(e)
    • Try
      • S(C);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR2(B)
        • P(e);P_SPINP(e)::QAR1(B)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(B);
    • Threat
      • DUALS(2)
    • Vars
      • K(c);S_FLIGHT::QAR(B)+S(C)
      • K(c);S_FLIGHT::S(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).