MESON Chess Problem Database

Problem Display
PID: 138488 (8/8/4K3/2pQn1pp/5Nkr/8/7p/6rN w - - 0 1)

Fomichev, Evgeny Vasilevich

Aleksandr Galitzky - Shakhmaty Geine (Vol 1), 2010

8/8/4K3/2pQn1pp/5Nkr/8/7p/6rN

#2

4 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sf3
      • 2.Qf5#
  • Tries
    • 1.Sd3?
      • 1...Kh3
        • 2.Sdf2#
      • 1...Rxh1
        • 2.Qg2#
      • 1...Sxd3
        • 2.Qf5#
      • 1...Ra1
        • 2.Qg2#
      • 1...Rb1
        • 2.Qg2#
      • 1...Rc1
        • 2.Qg2#
      • 1...Rd1
        • 2.Qg2#
      • 1...Re1
        • 2.Qg2#
      • 1...Rf1
        • 2.Qg2#
      • 1...Rg2
        • 2.Qxg2#
      • 1...Rg3
        • 2.Shf2#
      • 1...Rh3
        • 2.Qe4#
      • 1...Sf3
        • 2.Qf5#
      • 1...Sc4
        • 2.Qf5#
      • 1...Sc6
        • 2.Qf5#
      • 1...Sg6
        • 2.Qf5#
      • 1...Sd7
        • 2.Qf5#
      • 1...Sf7
        • 2.Qf5#
      • 1...c4!
  • Keys
    • 1.Se2!
      • threat
        • 2.Sf2#
      • 1...Kh3
        • 2.Sf2#
      • 1...Rxh1
        • 2.Qg2#
      • 1...Rf1
        • 2.Qg2#
      • 1...Rg2
        • 2.Qxg2#
      • 1...Rh3
        • 2.Qe4#
      • 1...Sd3
        • 2.Qf5#

This is a version of 138487

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • S(f);OGATE,SBLOCK::QAB1(C)
  • Tries
    • Try
      • S(B);
      • Vars
        • K(c);S_FLIGHT::S(B)
        • R(a);N_GUARD,XS(A)::QAR2(C)
        • S(f);OGATE,XS(B)::QAB1(C)
        • R(a);N_GUARD::QAR2(C)
        • R(a);N_GUARD::QAR2(C),XR(a)
        • R(a);SBLOCK::S(A)
        • R(d);SBLOCK::QAR2(C)
        • S(f);OGATE::QAB1(C)
      • Refutation
        • P(e);
  • Actual
    • S(B);
    • Threat
      • S(A)
    • Vars
      • K(c);S_FLIGHT::S(A)
      • R(a);N_GUARD,XS(A)::QAR2(C)
      • R(a);N_GUARD::QAR2(C)
      • R(a);N_GUARD::QAR2(C),XR(a)
      • R(d);SBLOCK::QAR2(C)
      • S(f);OGATE::QAB1(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).