MESON Chess Problem Database

Problem Display
PID: 59340 (b7/2Q1p2P/1p1Np1n1/R1bpk3/4N1PB/4p1P1/B1P5/7K w - - 0 1)

Ellerman, Arnoldo

Brisbane Courier, 1922

b7/2Q1p2P/1p1Np1n1/R1bpk3/4N1PB/4p1P1/B1P5/7K

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Ba3
      • 2.Qc3#
    • 1...Sf4
      • 2.h8Q#
      • 2.h8B#
    • 1...Sxh4
      • 2.h8Q#
      • 2.h8B#
    • 1...Sf8
      • 2.h8Q#
      • 2.h8B#
    • 1...dxe4
      • 2.Sf5#
  • Tries
    • 1.Sd2?
      • threat
        • 2.Sf3#
      • 1...d4+
        • 2.S6e4#
        • 2.Sb7#
      • 1...Kd4
        • 2.Sb5#
      • 1...Bxd6
        • 2.Qc3#
      • 1...Sxh4
        • 2.h8Q#
        • 2.h8B#
      • 1...exd6
        • 2.Qg7#
      • 1...exd2!
    • 1.Sxc5?
      • threat
        • 2.Sb5#
        • 2.Sf5#
      • 1...d4+
        • 2.Sde4#
        • 2.Sdb7#
      • 1...Kd4
        • 2.Sb5#
      • 1...Sxh4
        • 2.h8Q#
        • 2.h8B#
      • 1...exd6
        • 2.Qg7#
      • 1...b5
        • 2.Sxb5#
        • 2.Sf5#
      • 1...bxc5!
  • Keys
    • 1.Sg5!
      • threat
        • 2.Sf3#
      • 1...d4+
        • 2.Sde4#
      • 1...Kd4
        • 2.Sb5#
      • 1...Kf6
        • 2.Se8#
      • 1...Bxd6
        • 2.Qc3#
      • 1...Sxh4
        • 2.h8Q#
        • 2.h8B#
      • 1...exd6
        • 2.Qg7#

This is a version

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • B(b);OGATE,P_SPINP(c)::QAB(J)
    • S(g);N_GUARD::P=Q
    • S(g);N_GUARD,XB(G)::P=Q
    • P(c);P_SPINB(b),SBLOCK,XS(E)::QAB(J)+S(I)
  • Tries
    • Try
      • S(E);
      • Threat
        • S(E)
      • Vars
        • K(d);S_FLIGHT::S(I)
        • B(b);OGATE,P_SPINB(b),P_SPINP(c),SBLOCK,XS(I)::QAB(J)
        • S(g);N_GUARD,XB(G)::P=Q
        • P(h);OGATE,P_SPINP(h),SBLOCK,XS(I)::QAB(J)
      • Refutation
        • P(a);XS(E)
    • Try
      • S(E);XB(b)
      • Threat
        • DUALS(2)
      • Vars
        • K(d);S_FLIGHT::S(I)
        • S(g);N_GUARD,XB(G)::P=Q
        • P(h);OGATE,P_SPINP(h),SBLOCK,XS(I)::QAB(J)
      • Refutation
        • P(e);XS(E)
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • P(c);CHECK,P_SPINB(b),SBLOCK::QAB(J)+S(I)
      • K(d);S_FLIGHT::S(I)
      • B(b);OGATE,P_SPINB(b),P_SPINP(c),SBLOCK,XS(I)::QAB(J)
      • S(g);N_GUARD,XB(G)::P=Q
      • P(h);OGATE,P_SPINP(h),SBLOCK,XS(I)::QAB(J)
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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).