MESON Chess Problem Database

Problem Display
PID: 267875 (8/4B1R1/n7/2PBkb2/8/2K5/4PP2/7Q w - - 0 1)

Ducak, Jan

Probleemblad, 1985

8/4B1R1/n7/2PBkb2/8/2K5/4PP2/7Q

#2

8 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Bd6#
      • 2.Qh2#
    • 1...Bh3
      • 2.Qe4#
    • 1...Be4
      • 2.Qxe4#
    • 1...Bg4
      • 2.Qe4#
    • 1...Be6
      • 2.Qe4#
    • 1...Bd7
      • 2.Qe4#
    • 1...Bc8
      • 2.Qe4#
  • Tries
    • 1.Bf6+?
      • 1...Kf4
        • 2.Qf3#
        • 2.Qc1#
        • 2.Qh2#
        • 2.Qh6#
        • 2.e3#
      • 1...Kxf6!
    • 1.Rg5?
      • threat
        • 2.Qe4#
      • 1...Kf4
        • 2.Qh2#
      • 1...Sxc5!
    • 1.Rf7?
      • threat
        • 2.Bd6#
      • 1...Kf4
        • 2.Qe4#
      • 1...Be4
        • 2.Qxe4#
      • 1...Sxc5!
  • Keys
    • 1.e4!
      • threat
        • 2.Qh2#
      • 1...Kf4
        • 2.Bd6#
      • 1...Bxe4
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • B(b);N_GUARD::QAR1(A)
    • B(b);N_GUARD::QAR1(A),XB(b)
  • Tries
    • Try
      • B(G);CHECK
      • Refutation
        • K(a);S_FLIGHT,XB(G)
    • Try
      • R(H);P_PINB(b)
      • Threat
        • QAR1(A)
      • Vars
        • K(a);N_GUARD,N_SPINB(b),S_FLIGHT::QAB(A)
      • Refutation
        • S(c);XP(E)
    • Try
      • R(H);
      • Threat
        • B(G)
      • Vars
        • K(a);P_SPINB(b),S_FLIGHT::QAR1(A)
        • B(b);N_GUARD::QAR1(A),XB(b)
      • Refutation
        • S(c);XP(E)
  • Actual
    • P(B);
    • Threat
      • QAB(A)
    • Vars
      • K(a);N_GUARD,S_FLIGHT::B(G)
      • B(b);OGATE,XP(B)::QAR1(A),XB(b)
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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).