MESON Chess Problem Database

Problem Display
PID: 132198 (2Br3b/5n1r/KPk4p/1R1N2q1/PB6/8/n1N5/3R4 w - - 0 1)

Casa, Alex

5th HM., Themes-64, 1970

2Br3b/5n1r/KPk4p/1R1N2q1/PB6/8/n1N5/3R4

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qc1
      • 2.Se7#
    • 1...Qd2
      • 2.Se7#
    • 1...Qf4
      • 2.Se7#
    • 1...Qe7
      • 2.Sxe7#
    • 1...Qg1
      • 2.Se7#
    • 1...Qg2
      • 2.Se7#
    • 1...Qg3
      • 2.Se7#
    • 1...Qg4
      • 2.Se7#
    • 1...Qf5
      • 2.Se7#
    • 1...Qh5
      • 2.Se7#
    • 1...Qg6
      • 2.Se7#
    • 1...Qg7
      • 2.Se7#
    • 1...Qg8
      • 2.Se7#
    • 1...Rg7
      • 2.Sd4#
    • 1...Rd6
      • 2.Rc5#
    • 1...Bd4
      • 2.Sxd4#
    • 1...Sxb4+
      • 2.Sdxb4#
    • 1...Se5
      • 2.Sd4#
    • 1...Sd6
      • 2.Rc5#
  • Keys
    • 1.Sf6!
      • threat
        • 2.Bb7#
      • 1...Qxb5+
        • 2.axb5#
      • 1...Sxb4+
        • 2.Sxb4#
      • 1...Rxc8
        • 2.Sd4#
      • 1...Rd7
        • 2.Bxd7#
      • 1...Se5
        • 2.Rc5#
      • 1...Sd6
        • 2.Sd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 3
    • REMOVED MATES = 16
  • Sets
    • Q(b);N_GUARD::S(F)
    • Q(b);N_GUARD::S(F),XQ(b)
    • R(f);S_CUTB(h)::S(B)
    • R(g);SBLOCK::R1(E)
    • B(h);N_GUARD::S(B),XB(h)
    • S(a);CHECK,XB(D)::S(F),XS(a)
    • S(e);S_CUTB(h)::S(B)
    • S(e);SBLOCK::R1(E)
  • Actual
    • S(F);
    • Threat
      • B(I)
    • Vars
      • Q(b);CHECK,OGATE,XR(E)::P(C),XQ(b)
      • S(a);CHECK,XB(D)::S(B),XS(a)
      • R(g);N_GUARD,XB(I)::S(B)
      • R(g);N_GUARD::B(I),XR(g)
      • S(e);S_CUTQ(b)::R1(E)
      • S(e);S_CUTR(g)::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).