MESON Chess Problem Database

Problem Display
PID: 216235 (2K2b2/5Q2/3P4/4k3/4P3/8/3BP3/8 w - - 0 1)

Bull, Thomas Porter

Baltimore American and Commercial Advertiser, 1881

2K2b2/5Q2/3P4/4k3/4P3/8/3BP3/8

#2

6 + 2

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qd5#
  • Tries
    • 1.Bc3+?
      • 1...Kxe4
        • 2.Qf3#
      • 1...Kxd6!
    • 1.Qe6+?
      • 1...Kd4
        • 2.Qd5#
      • 1...Kxe6!
    • 1.Qf5+?
      • 1...Kd4
        • 2.Qd5#
      • 1...Kxd6!
  • Keys
    • 1.Be3!
      • 1...Kxe4
        • 2.Qe6#
      • 1...Kxd6
        • 2.Qf6#
      • 1...Bxd6
        • 2.Qf5#
      • 1...Bh6
        • 2.Qe7#
      • 1...Be7
        • 2.Qxe7#
      • 1...Bg7
        • 2.Qe7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • K(a);S_FLIGHT::QAR1(E)
  • Tries
    • Try
      • B(A);CHECK
      • Vars
        • K(a);P-FLIGHT,XP(C)::QAB1(E)
      • Refutation
        • K(a);S_FLIGHT,XP(D)
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(E)
      • Refutation
        • K(a);P-FLIGHT,XQ(E)
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT,XP(D)
  • Actual
    • B(A);
    • Vars
      • K(a);P-FLIGHT,XP(C)::QAR2(E)
      • K(a);S_FLIGHT,XP(D)::QAR2(E)
      • B(b);SBLOCK,XP(D)::QAR1(E)
      • B(b);N_GUARD::QAR2(E)
      • B(b);N_GUARD::QAR2(E),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).