MESON Chess Problem Database

Problem Display
PID: 185927 (1N1R1K2/1pkpPp2/1p6/1q6/3BN1B1/8/8/8 w - - 0 1)

Lin, Tien Ling

Chess, 1957

1N1R1K2/1pkpPp2/1p6/1q6/3BN1B1/8/8/8

#2

7 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...d5
      • 2.Be5#
      • 2.Rc8#
    • 1...d6
      • 2.Rc8#
  • Tries
    • 1.Sd6?
      • threat
        • 2.Sxb5#
        • 2.Se8#
      • 1...Qf1
        • 2.Se8#
      • 1...Qe2
        • 2.Se8#
      • 1...Qd3
        • 2.Se8#
      • 1...Qa4
        • 2.Se8#
      • 1...Qc4
        • 2.Se8#
      • 1...Qa6
        • 2.Se8#
      • 1...Qc6
        • 2.Se8#
      • 1...Qb1
        • 2.Se8#
      • 1...Qb2
        • 2.Se8#
      • 1...Qb3
        • 2.Se8#
      • 1...Qb4
        • 2.Se8#
      • 1...Qa5
        • 2.Se8#
      • 1...Qc5
        • 2.Se8#
      • 1...Qd5
        • 2.Se8#
      • 1...Qe5
        • 2.Se8#
      • 1...Qf5
        • 2.Se8#
      • 1...Qg5
        • 2.Se8#
      • 1...Qh5
        • 2.Se8#
      • 1...Kxd6!
    • 1.Be5+?
      • 1...d6
        • 2.Bxd6#
        • 2.Rc8#
      • 1...Qxe5!
  • Keys
    • 1.Sf6!
      • threat
        • 2.Se8#
      • 1...Kd6
        • 2.e8S#
      • 1...d5
        • 2.Be5#
      • 1...d6
        • 2.Rc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(e);::R1(F)
  • Tries
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Vars
        • Q(a);::S(B)
      • Refutation
        • K(d);P_SPINP(e),S_FLIGHT,XS(B)
    • Try
      • B(A);CHECK
      • Refutation
        • Q(a);XB(A)
  • Actual
    • S(B);
    • Threat
      • S(B)
    • Vars
      • K(d);P_SPINP(e),S_FLIGHT::P=S
      • P(e);N_GUARD,S_CUTQ(a)::B(A)
      • P(e);SBLOCK::R1(F)
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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).