MESON Chess Problem Database

Problem Display
PID: 67455 (5b1K/3r2p1/1r5p/5R2/RBNkn3/3Pp3/1P6/n2QqB2 w - - 0 1)

Burmistrov, Sergey Gennadevich

Permyakov, Evgeni Nikolaevich

2nd HM., Kurimcan, 1984

5b1K/3r2p1/1r5p/5R2/RBNkn3/3Pp3/1P6/n2QqB2

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Sd2
      • 2.Bc3#
    • 1...Sd6
      • 2.Bc5#
  • Tries
    • 1.Qg4?
      • threat
        • 2.Qxe4#
      • 1...Qh4
        • 2.Bc3#
      • 1...Re7
        • 2.Bc5#
      • 1...Re6!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Bc3#
        • 2.Bc5#
      • 1...Qxb4
        • 2.dxe4#
      • 1...Rxb4
        • 2.Sb5#
      • 1...e2
        • 2.Bc5#
      • 1...Qc3
        • 2.Bxc3#
        • 2.Bc5#
      • 1...Sc3
        • 2.Bxc3#
        • 2.Bc5#
      • 1...Sc5
        • 2.Bc3#
        • 2.Bxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • S(e);N_GUARD,S_CUTQ(b)::B(F)
    • S(e);N_GUARD,S_CUTB(j)::B(F)
  • Tries
    • Try
      • Q(A);P_PINS(e)
      • Threat
        • QAR1(A),XS(e)
      • Vars
        • Q(b);N_GUARD::B(F)
        • R(h);S_CUTB(j)::B(F)
      • Refutation
        • R(f);
  • Actual
    • S(G);
    • Threat
      • DUALS(2)
    • Vars
      • Q(b);N_GUARD,P_SPINQ(b),XB(F)::QAR(A)+P(D),XS(e)
      • R(f);N_GUARD,P_SPINR(f),XB(F)::S(G)
      • P(c);::R(E)+B(F),DCHECK
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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).