MESON Chess Problem Database

Problem Display
PID: 245947 (8/n6B/Q7/2pk4/3p1B2/8/3K4/7b w - - 0 1)

Kopyl, Valery Volodimirovich

Problemist Ukraini, 2015

8/n6B/Q7/2pk4/3p1B2/8/3K4/7b

#2

4 + 5

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Be4
      • 2.Bg8#
    • 1...c4
      • 2.Qd6#
  • Tries
    • 1.Qb7+?
      • 1...Kc4
        • 2.Bd3#
      • 1...Sc6
        • 2.Qf7#
      • 1...Ke6!
  • Keys
    • 1.Kd3!
      • threat
        • 2.Bg8#
        • 2.Qd6#
      • 1...Be4+
        • 2.Bxe4#
      • 1...c4+
        • 2.Qxc4#
      • 1...Sc6
        • 2.Bg8#
        • 2.Qc4#
      • 1...Sb5
        • 2.Bg8#
      • 1...Sc8
        • 2.Bg8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(a);SBLOCK::B(D)
    • P(c);SBLOCK::QAR1(C)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(d);S_FLIGHT::B(D)
        • S(e);P_SPINS(e),SBLOCK::QAB(C)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • K(A);P-FLIGHT
    • Threat
      • DUALS(2)
    • Vars
      • B(a);CHECK,N_GUARD::B(D),XB(a)
      • P(c);CHECK::QAB1(C),XP(c)
      • S(e);::B(D)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).