MESON Chess Problem Database

Problem Display
PID: 272424 (8/1bN5/2p1PQ2/4R1p1/1prkN1p1/b2rR3/3p4/3B3K w - - 0 1)

Lin, Tien Ling

The Problemist, 1957

8/1bN5/2p1PQ2/4R1p1/1prkN1p1/b2rR3/3p4/3B3K

#2

8 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe3
      • 2.Qf2#
  • Tries
    • 1.Sb5+?
      • 1...Kxe3
        • 2.Qxg5#
        • 2.Qf2#
      • 1...cxb5!
    • 1.Qd8+?
      • 1...Kxe5
        • 2.Qf6#
      • 1...Kxe3!
  • Keys
    • 1.Sc3!
      • threat
        • 2.Se2#
      • 1...c5+
        • 2.R5e4#
      • 1...Kxc3
        • 2.Rc5#
      • 1...Rdxc3
        • 2.Qd8#
      • 1...Rxe3
        • 2.Rd5#
      • 1...Rcxc3
        • 2.R3e4#
      • 1...bxc3
        • 2.R3e4#
      • 1...Rc5
        • 2.R5e4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • K(f);OGATEB,S_FLIGHT,XR(C)::QAB1(G)
  • Tries
    • Try
      • S(H);CHECK
      • Refutation
        • P(i);P_PINS(D),XS(H)
    • Try
      • Q(G);CHECK
      • Vars
        • K(f);OGATEB,S_FLIGHT,XR(E)::QAB1(G)
      • Refutation
        • K(f);S_FLIGHT,XR(C)
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • P(i);CHECK,SBLOCK::QAB(G)+R(E),DCHECK
      • K(f);N_GUARD,P_SPINR(c),S_FLIGHT,XS(D)::QAB(G)+R(E)
      • R(c);XS(D)::QAR(G)
      • R(c);SBLOCK,XR(C)::QAB(G)+R(E),DCHECK
      • R(e);SBLOCK,XS(D)::R1(C)
      • P(d);SBLOCK,XS(D)::R1(C)
      • R(e);SBLOCK::QAB(G)+R(E),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).