MESON Chess Problem Database

Problem Display
PID: 172526 (8/8/2Q5/4p3/8/8/p1K5/k3b1B1 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 2002

8/8/2Q5/4p3/8/8/p1K5/k3b1B1

#2

3 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bf2
      • 2.Qc3#
    • 1...Bc3
      • 2.Qxc3#
    • 1...Bg3
      • 2.Qc3#
    • 1...Bh4
      • 2.Qc3#
  • Tries
    • 1.Bd4+?
      • 1...Bc3
        • 2.Bxc3#
        • 2.Qh1#
        • 2.Qxc3#
      • 1...exd4!
  • Keys
    • 1.Qh1!
      • 1...Bd2
        • 2.Bd4#
      • 1...Bf2
        • 2.Bxf2#
      • 1...Bc3
        • 2.Bd4#
      • 1...Bg3
        • 2.Bf2#
        • 2.Bd4#
      • 1...Bb4
        • 2.Bd4#
      • 1...Bh4
        • 2.Bf2#
        • 2.Bd4#
      • 1...Ba5
        • 2.Bd4#
      • 1...e4
        • 2.Bd4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • B(b);N_GUARD::QAB(C)
    • B(b);N_GUARD::QAB(C),XB(b)
  • Tries
    • Try
      • B(A);CHECK
      • Refutation
        • P(d);XB(A)
  • Actual
    • Q(C);
    • Vars
      • B(b);::QAR(C)+B(A),DCHECK
      • B(b);OGATEB::QAR(C)+B(A),XB(b)
      • B(b);S_CUTP(d)::QAR(C)+B(A)
      • P(d);N_GUARD::B(A)
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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).