MESON Chess Problem Database

Problem Display
PID: 57349 (4r3/2b2bB1/1p3rn1/N6Q/3kNR2/8/3P4/1B2K3 w - - 0 1)

Hartong, Jan

3rd Comm., Brisbane Courier, 1919-1920

4r3/2b2bB1/1p3rn1/N6Q/3kNR2/8/3P4/1B2K3

#2

8 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe4+
      • 2.Rxe4#
    • 1...Bc4
      • 2.Sc6#
    • 1...Se7
      • 2.Sd6#
    • 1...bxa5
      • 2.Qc5#
    • 1...b5
      • 2.Qc5#
  • Keys
    • 1.Qb5!
      • threat
        • 2.Sc6#
      • 1...Rxe4+
        • 2.Rxe4#
      • 1...bxa5
        • 2.Qc5#
      • 1...Bd5
        • 2.Qb2#
      • 1...Re5
        • 2.Qd3#
      • 1...Re6
        • 2.Sb3#
      • 1...Be5
        • 2.Qd3#
      • 1...Se5
        • 2.Sxf6#
      • 1...Se7
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • R(g);CHECK,N_SPINR(c),OGATE,P_SPINR(g),XS(D)::R1(E),XR(g)
    • B(f);SBLOCK::S(F)
    • S(d);N_PINS(D)::R(E)+S(D)
    • P(b);N_GUARD,XS(F)::QAB1(G)
    • P(b);N_GUARD::QAB1(G)
  • Actual
    • Q(G);
    • Threat
      • S(F)
    • Vars
      • R(g);CHECK,N_SPINR(c),OGATE,P_SPINR(g),XS(D)::R1(E),XR(g)
      • P(b);N_GUARD,XS(F)::QAB1(G)
      • B(f);SBLOCK::QAB(G)
      • R(g);N_SPINR(c),SBLOCK::QAR1(G)
      • R(g);S_CUTB(f)::S(F)
      • B(e);N_PINS(D),N_SPINR(c),SBLOCK::QAR1(G)
      • S(d);N_PINS(D),N_SPINR(c)::R(E)+S(D),XR(c)
      • S(d);N_PINS(D)::R(E)+S(D)
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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).