MESON Chess Problem Database

Problem Display
PID: 263565 (5N1k/5Kbp/8/4N2n/8/8/8/Q7 w - - 0 1)

Murashev, Pavel Aleksandrovich

7th Place, SuperProblem 006. TT, 2012

5N1k/5Kbp/8/4N2n/8/8/8/Q7

#2

4 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Bh6
      • 2.Seg6#
    • 1...Bxf8
      • 2.Sg6#
    • 1...h6
      • 2.Seg6#
  • Tries
    • 1.Qg1?
      • 1...Bxe5
        • 2.Qg8#
      • 1...Bxf8
        • 2.Qg8#
      • 1...Bf6
        • 2.Qg8#
      • 1...Bh6
        • 2.Qg8#
      • 1...Sf4
        • 2.Qxg7#
      • 1...Sf6
        • 2.Qxg7#
      • 1...h6
        • 2.Seg6#
      • 1...Sg3!
  • Keys
    • 1.Qa8!
      • threat
        • 2.Sfg6#
      • 1...Bxf8
        • 2.Qxf8#
      • 1...h6
        • 2.Seg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • B(b);::QAB(A)+S(B),DCHECK
    • B(b);XS(D)::QAB(A)+S(B),DCHECK
    • P(c);N_GUARD::S(B)
  • Tries
    • Try
      • Q(A);
      • Vars
        • B(b);OGATE,XS(B)::QAR1(A)
        • B(b);OGATE,XS(D)::QAR1(A)
        • B(b);OGATE::QAR1(A)
        • S(a);N_GUARD::QAB1(A),XB(b)
        • P(c);N_GUARD::S(B)
      • Refutation
        • S(a);
  • Actual
    • Q(A);
    • Threat
      • QAR(A)+S(D),DCHECK
    • Vars
      • B(b);OGATE,P_SPINB(b),XS(D)::QAR2(A),XB(b)
      • P(c);N_GUARD::S(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).