MESON Chess Problem Database

Problem Display
PID: 164204 (6k1/4p1r1/4K1p1/8/8/7Q/8/B7 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 1996

6k1/4p1r1/4K1p1/8/8/7Q/8/B7

#2

3 + 4

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Rf7
      • 2.Qh8#
  • Tries
    • 1.Qh1?
      • 1...Kf8
        • 2.Qa8#
      • 1...Rh7
        • 2.Qa8#
      • 1...Rf7
        • 2.Qh8#
      • 1...g5!
    • 1.Qh2?
      • 1...Kf8
        • 2.Qb8#
      • 1...Rh7
        • 2.Qb8#
      • 1...Rf7
        • 2.Qh8#
      • 1...g5!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qxg7#
      • 1...Kh7
        • 2.Qxg7#
      • 1...Kf8
        • 2.Qc8#
      • 1...Kh8
        • 2.Qxg7#
      • 1...Rh7
        • 2.Qc8#
      • 1...Rf7
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(c);::QAR1(B)
  • Tries
    • Try
      • Q(B);
      • Vars
        • K(d);P-FLIGHT::QAR(B)
        • R(c);SBLOCK::QAR(B)
        • R(c);::QAR1(B)
      • Refutation
        • P(a);
    • Try
      • Q(B);
      • Vars
        • K(d);P-FLIGHT::QAR(B)
        • R(c);SBLOCK::QAR(B)
        • R(c);::QAR1(B)
      • Refutation
        • P(a);
  • Actual
    • Q(B);
    • Threat
      • QAR1(B),XR(c)
    • Vars
      • K(d);S_FLIGHT::QAR1(B),XR(c)
      • K(d);P-FLIGHT::QAR(B)
      • K(d);P-FLIGHT,P_SPINR(c)::QAB1(B),XR(c)
      • R(c);SBLOCK::QAR(B)
      • R(c);OGATE::QAR1(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).