MESON Chess Problem Database

Problem Display
PID: 179947 (K7/Q5n1/3p4/1pR3N1/1p1k4/5P2/3PP3/n3N1q1 w - - 0 1)

Gross, Erwin

Themes-64, 1978

K7/Q5n1/3p4/1pR3N1/1p1k4/5P2/3PP3/n3N1q1

#2

8 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qh2
      • 2.e3#
    • 1...Qf1
      • 2.e3#
    • 1...Qh1
      • 2.e3#
    • 1...Qg2
      • 2.e3#
    • 1...Qg3
      • 2.e3#
    • 1...Qg4
      • 2.e3#
    • 1...Sc2
      • 2.Sxc2#
    • 1...Sb3
      • 2.Sc2#
    • 1...Sf5
      • 2.Se6#
    • 1...Sh5
      • 2.Se6#
    • 1...Se6
      • 2.Sxe6#
    • 1...Se8
      • 2.Se6#
  • Tries
    • 1.Se4?
      • threat
        • 2.Qxa1#
      • 1...Qxe1
        • 2.Qxg7#
      • 1...dxc5
        • 2.Qxc5#
      • 1...Qe3
        • 2.Qxg7#
      • 1...Sc2
        • 2.Sxc2#
      • 1...Sb3
        • 2.Sc2#
      • 1...b3!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Qxg7#
      • 1...Qxg5
        • 2.Qxa1#
      • 1...dxc5
        • 2.Qxc5#
      • 1...Qh2
        • 2.Qxa1#
      • 1...Qe3
        • 2.Qxa1#
      • 1...Qg3
        • 2.Qxa1#
      • 1...Sf5
        • 2.Se6#
      • 1...Sh5
        • 2.Se6#
      • 1...Se6
        • 2.Sxe6#
      • 1...Se8
        • 2.Se6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • Q(b);N_GUARD::P(C)
    • Q(b);N_GUARD,P_PINP(D)::P(C)
    • S(a);N_GUARD::S(A),XS(a)
    • S(a);N_GUARD::S(A)
    • S(g);N_GUARD::S(F)
    • S(g);N_GUARD::S(F),XS(g)
  • Tries
    • Try
      • S(F);
      • Threat
        • QAB(G),XS(a)
      • Vars
        • Q(b);N_GUARD,XS(A)::QAB(G),XS(g)
        • P(f);OGATE,P_SPINP(f),XR(E)::QAB1(G),XP(f)
        • Q(b);N_GUARD::QAB(G),XS(g)
        • S(a);N_GUARD::S(A),XS(a)
        • S(a);N_GUARD::S(A)
      • Refutation
        • P(c);
  • Actual
    • S(A);
    • Threat
      • QAB(G),XS(g)
    • Vars
      • Q(b);N_GUARD,XS(F)::QAB(G),XS(a)
      • P(f);OGATE,P_SPINP(f),XR(E)::QAB1(G),XP(f)
      • Q(b);N_GUARD::QAB(G),XS(a)
      • S(g);N_GUARD::S(F)
      • S(g);N_GUARD::S(F),XS(g)
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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).