MESON Chess Problem Database

Problem Display
PID: 172484 (5bR1/5k1p/8/4KN2/8/8/8/6Q1 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 2001

5bR1/5k1p/8/4KN2/8/8/8/6Q1

#2

4 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Ba3
      • 2.Qg7#
    • 1...Bb4
      • 2.Qg7#
    • 1...Bc5
      • 2.Qg7#
    • 1...Be7
      • 2.Sh6#
      • 2.Qg7#
    • 1...Bg7+
      • 2.Qxg7#
    • 1...h5
      • 2.Qg6#
    • 1...h6
      • 2.Qg6#
  • Tries
    • 1.Qa7+?
      • 1...Ke8
        • 2.Qe7#
      • 1...Be7
        • 2.Sh6#
        • 2.Qa2#
      • 1...Kxg8!
    • 1.Qg7+?
      • 1...Ke8
        • 2.Rxf8#
        • 2.Qe7#
      • 1...Bxg7+!
  • Keys
    • 1.Qg5!
      • 1...Bd6+
        • 2.Sxd6#
      • 1...Bg7+
        • 2.Qxg7#
      • 1...Ke8
        • 2.Qe7#
      • 1...Ba3
        • 2.Sh6#
        • 2.Qg7#
      • 1...Bb4
        • 2.Sh6#
        • 2.Qg7#
      • 1...Bc5
        • 2.Sh6#
        • 2.Qg7#
      • 1...Bh6
        • 2.Sd6#
        • 2.Sxh6#
      • 1...Be7
        • 2.Sh6#
        • 2.Qg7#
      • 1...h5
        • 2.Qg6#
      • 1...h6
        • 2.Qg6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • B(c);N_GUARD::QAR1(A)
    • B(c);CHECK,N_GUARD::QAR1(A),XB(c)
    • P(b);N_GUARD::QAB1(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P_SPINB(c),S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT,XR(D)
    • Try
      • Q(A);CHECK
      • Refutation
        • B(c);CHECK,XQ(A)
  • Actual
    • Q(A);
    • Vars
      • B(c);CHECK,N_GUARD::S(C),XB(c)
      • B(c);CHECK,N_GUARD::QAR1(A),XB(c)
      • K(a);P_SPINB(c),S_FLIGHT::QAR1(A)
      • P(b);N_GUARD::QAB1(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).