MESON Chess Problem Database

Problem Display
PID: 59220 (8/4p2r/KB1p3p/1QNkn2R/8/pPp3N1/4p3/1n1qr2b w - - 0 1)

Sparke, Arthur M

2nd Highly Comm., Brisbane Courier, 1921-1922

8/4p2r/KB1p3p/1QNkn2R/8/pPp3N1/4p3/1n1qr2b

#2

7 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Sd3#
      • 2.Sa4#
      • 2.Sce4#
      • 2.Se6#
      • 2.Sb7#
      • 2.Sd7#
    • 1...dxc5
      • 2.Qd7#
    • 1...e6
      • 2.Sd3#
      • 2.Sa4#
      • 2.Sce4#
      • 2.Sb7#
      • 2.Sd7#
  • Tries
    • 1.Rxe5+?
      • 1...Kd4
        • 2.Sd3#
        • 2.Sa4#
        • 2.Sce4#
        • 2.Se6#
        • 2.Sb7#
        • 2.Sd7#
      • 1...dxe5
        • 2.Qd7#
      • 1...Kxe5!
    • 1.Qc6+?
      • 1...Kd4
        • 2.Sf5#
      • 1...Kxc6!
  • Keys
    • 1.Kb7!
      • threat
        • 2.Qc4#
      • 1...Kd4+
        • 2.Sce4#
      • 1...e6+
        • 2.Sd7#
      • 1...Qxb3
        • 2.Qd3#
      • 1...dxc5
        • 2.Qd7#
      • 1...Qd3
        • 2.Qxd3#
      • 1...Qd4
        • 2.Qc6#
      • 1...Sd2
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • P(j);OGATEB,P_SPINP(j),XS(D)::QAR2(C)
  • Tries
    • Try
      • R(E);CHECK,XS(i)
      • Vars
        • P(j);SBLOCK,XR(E)::QAR2(C)
      • Refutation
        • K(h);P-FLIGHT,XR(E)
    • Try
      • Q(C);CHECK
      • Vars
        • K(h);N_SPINS(i),P-FLIGHT::S(B)
      • Refutation
        • K(h);N_SPINS(i),S_FLIGHT,XQ(C)
  • Actual
    • K(F);S_FLIGHT
    • Threat
      • QAB1(C)
    • Vars
      • K(h);CHECK,N_SPINS(i),P-FLIGHT::B(G)+S(D)
      • P(l);CHECK,SBLOCK::QAR(C)+S(D)
      • Q(b);N_GUARD,XP(A)::QAR2(C)
      • P(j);OGATEB,P_SPINP(j),XS(D)::QAR2(C)
      • Q(b);N_GUARD::QAR2(C),XQ(b)
      • Q(b);SBLOCK::QAB1(C)
      • S(a);S_CUTQ(b)::QAR2(C)
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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).