MESON Chess Problem Database

Problem Display
PID: 235725 (8/8/4K3/1p1N4/4k1n1/7Q/1B6/4n3 w - - 0 1)

Shmatov, Vladimir Afanasievich

Zadachi i Etyudi, 2002

8/8/4K3/1p1N4/4k1n1/7Q/1B6/4n3

#2

4 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Sd3
      • 2.Qg2#
      • 2.Qh1#
    • 1...Sf3
      • 2.Qh7#
    • 1...Sf2
      • 2.Qf5#
      • 2.Qe3#
    • 1...Sh2
      • 2.Qf5#
      • 2.Qe3#
    • 1...Se3
      • 2.Qxe3#
    • 1...Se5
      • 2.Qf5#
      • 2.Qe3#
    • 1...Sf6
      • 2.Qf5#
      • 2.Qe3#
    • 1...Sh6
      • 2.Qe3#
  • Tries
    • 1.Be5?
      • threat
        • 2.Sc3#
      • 1...Sxe5
        • 2.Qe3#
      • 1...Sf3
        • 2.Qh7#
      • 1...Se3
        • 2.Qxe3#
      • 1...b4!
  • Keys
    • 1.Qf1!
      • threat
        • 2.Qf5#
      • 1...Sf2
        • 2.Qe2#
      • 1...Sf3
        • 2.Qb1#
      • 1...Se3
        • 2.Sf6#
      • 1...Sh6
        • 2.Qe2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(a);SBLOCK::QAB(B)
    • S(c);N_GUARD::QAR1(B),XS(c)
    • S(c);N_GUARD::QAR1(B)
  • Tries
    • Try
      • B(A);
      • Threat
        • S(C)
      • Vars
        • S(c);N_GUARD,XB(A)::QAR1(B)
        • S(a);SBLOCK::QAB(B)
        • S(c);N_GUARD::QAR1(B),XS(c)
      • Refutation
        • P(d);
  • Actual
    • Q(B);
    • Threat
      • QAB1(B)
    • Vars
      • S(c);N_GUARD::QAR2(B)
      • S(a);OGATE,SBLOCK::QAB(B)
      • S(c);N_GUARD,SBLOCK::S(C)
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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).