MESON Chess Problem Database

Problem Display
PID: 182221 (5Q2/8/8/3pn3/5R1P/3Pk3/6P1/3K4 w - - 0 1)

Bilek, B

Lidove noviny, 1906

5Q2/8/8/3pn3/5R1P/3Pk3/6P1/3K4

#2

6 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd3
      • 2.Qa3#
  • Tries
    • 1.Qb4?
      • threat
        • 2.Qd2#
        • 2.Qd4#
      • 1...Kxd3
        • 2.Qd2#
        • 2.Qa3#
        • 2.Qb3#
        • 2.Qd4#
      • 1...Sf3
        • 2.Rxf3#
      • 1...d4
        • 2.Qd2#
        • 2.Qxd4#
      • 1...Sc6
        • 2.Rf3#
        • 2.Qd2#
      • 1...Sc4!
    • 1.Qc5+?
      • 1...Kxd3
        • 2.Qa3#
        • 2.Qd4#
      • 1...d4
        • 2.Qxd4#
      • 1...Kxf4!
  • Keys
    • 1.Qe7!
      • 1...Kxd3
        • 2.Qa3#
      • 1...Kxf4
        • 2.Qg5#
      • 1...d4
        • 2.Rf3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);OGATEB,P-FLIGHT,XP(C)::QAR(F)
  • Tries
    • Try
      • Q(F);
      • Threat
        • DUALS(2)
      • Vars
        • S(c);N_GUARD::R1(D),XS(c)
      • Refutation
        • S(c);
    • Try
      • Q(F);CHECK
      • Vars
        • P(b);P_SPINP(b)::QAB1(F),XP(b)
      • Refutation
        • K(a);S_FLIGHT,XR(D)
  • Actual
    • Q(F);P_PINS(c)
    • Vars
      • K(a);N_SPINS(c),OGATEB,P-FLIGHT,XP(C)::QAR(F)
      • K(a);N_SPINS(c),OGATEB,S_FLIGHT,XR(D)::QAB1(F)
      • P(b);SBLOCK::R1(D)
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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).