MESON Chess Problem Database

Problem Display
PID: 172479 (1K2B1b1/2R1p3/3k4/8/8/8/8/4Q3 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 2001

1K2B1b1/2R1p3/3k4/8/8/8/8/4Q3

#2

4 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bd5
      • 2.Qxe7#
  • Tries
    • 1.Bf7?
      • threat
        • 2.Qe6#
        • 2.Qxe7#
      • 1...e6
        • 2.Qxe6#
      • 1...e5
        • 2.Qd2#
        • 2.Qb4#
        • 2.Qd1#
      • 1...Bxf7!
  • Keys
    • 1.Qe4!
      • threat
        • 2.Rc6#
      • 1...e5
        • 2.Qc6#
      • 1...Bd5
        • 2.Qxe7#
      • 1...e6
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(c);SBLOCK::QAB1(A),XP(b)
  • Tries
    • Try
      • B(D);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::QAR1(A),XP(b)
      • Refutation
        • B(c);XB(D)
  • Actual
    • Q(A);
    • Threat
      • R1(B)
    • Vars
      • P(b);SBLOCK::QAR1(A)
      • B(c);SBLOCK::QAB1(A),XP(b)
      • P(b);SBLOCK,S_CUTB(c)::QAR2(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).