MESON Chess Problem Database

Problem Display
PID: 57350 (4n1b1/2p5/2R2p1K/Qp1k4/1B1N1P2/n1P2R1p/r7/r6B w - - 0 1)

Sparke, Arthur M

4th Comm., Brisbane Courier, 1919-1920

4n1b1/2p5/2R2p1K/Qp1k4/1B1N1P2/n1P2R1p/r7/r6B

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Sb1
      • 2.Rf2#
    • 1...Sc2
      • 2.Rf1#
  • Tries
    • 1.Rxh3+?
      • 1...Rg2
        • 2.Bxg2#
      • 1...Rxh1!
    • 1.Qxb5+?
      • 1...Ke4
        • 2.Qf5#
      • 1...Sxb5!
  • Keys
    • 1.Qa8!
      • threat
        • 2.Rxc7#
      • 1...Ke4
        • 2.Re6#
      • 1...Sb1
        • 2.Rf2#
      • 1...Sc2
        • 2.Rf1#
      • 1...Sc4
        • 2.Rd6#
      • 1...Sd6
        • 2.Rc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(c);S_CUTR(a)::B(A)+R(C)
    • S(c);S_CUTR(b)::B(A)+R(C)
  • Tries
    • Try
      • R(C);CHECK,XP(d)
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::B(A),XR(b)
      • Refutation
        • R(a);P_PINR(C),XB(A)
    • Try
      • Q(G);CHECK,XP(e)
      • Vars
        • K(f);OGATE,S_FLIGHT::QAB1(G)
      • Refutation
        • S(c);XQ(G)
  • Actual
    • Q(G);N_PINP(e)
    • Threat
      • QAB(G)+R(H),XP(h)
    • Vars
      • K(f);S_FLIGHT::QAB(G)+R(H),DCHECK
      • S(c);S_CUTR(a)::B(A)+R(C)
      • S(c);S_CUTR(b)::B(A)+R(C)
      • S(c);SBLOCK::QAB(G)+R(H),DCHECK
      • S(i);SBLOCK::QAB(G)+R(H),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).