MESON Chess Problem Database

Problem Display
PID: 45244 (1b4r1/5R2/2n3n1/p2N3N/4k3/R1Q5/BP1pr3/Kb6 w - - 0 1)

Shaw, EH

Recomm., BCF 045. Ty., 1943-1944

1b4r1/5R2/2n3n1/p2N3N/4k3/R1Q5/BP1pr3/Kb6

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rf2
      • 2.Qe3#
    • 1...Rg2
      • 2.Qe3#
    • 1...Rh2
      • 2.Qe3#
    • 1...Re3
      • 2.Qxe3#
    • 1...Bg3
      • 2.Sxg3#
    • 1...Ba7
      • 2.Sg3#
    • 1...Sce5
      • 2.Sg3#
    • 1...Sa7
      • 2.Ra4#
    • 1...Sce7
      • 2.Ra4#
    • 1...Sd8
      • 2.Ra4#
    • 1...Sge5
      • 2.Rf4#
  • Tries
    • 1.Ra4+?
      • 1...Sd4
        • 2.Qxd4#
      • 1...Sb4!
  • Keys
    • 1.Qc5!
      • threat
        • 2.Sdf6#
      • 1...Ke5
        • 2.Sc3#
        • 2.Sdf6#
      • 1...Rf2
        • 2.Re3#
        • 2.Qe3#
      • 1...Re3
        • 2.Rxe3#
        • 2.Qxe3#
      • 1...Bd3
        • 2.Sc3#
      • 1...Be5
        • 2.Bxb1#
      • 1...Sce5
        • 2.Sg3#
      • 1...Sge5
        • 2.Rf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 9
  • Sets
    • R(c);N_GUARD::QAR1(E)
    • R(c);N_GUARD::QAR1(E),XR(c)
    • B(h);N_GUARD::S(G),XB(h)
    • B(h);N_GUARD::S(G)
    • S(f);S_CUTB(h)::S(G)
    • S(f);N_GUARD::R(D)
    • S(g);N_GUARD,S_CUTB(h)::R1(H)
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • S(f);N_GUARD,P_SPINS(f)::QAR1(E),XS(f)
      • Refutation
        • S(f);P_SPINS(f)
  • Actual
    • Q(E);
    • Threat
      • S(F)
    • Vars
      • B(a);SBLOCK::S(F)
      • B(h);P_PINP(C),SBLOCK::B(B),XB(a)
      • S(f);SBLOCK,S_CUTB(h)::S(G)
      • S(g);N_GUARD,SBLOCK,S_CUTB(h)::R1(H)
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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).