MESON Chess Problem Database

Problem Display
PID: 186082 (3N3k/2p1N3/6K1/3b1p1B/7R/2r5/8/Qn1rb3 w - - 0 1)

Lin, Tien Ling

Chess, 1958

3N3k/2p1N3/6K1/3b1p1B/7R/2r5/8/Qn1rb3

#2

6 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Bh1
      • 2.Sf7#
    • 1...Bg2
      • 2.Sf7#
    • 1...Bf3
      • 2.Sf7#
    • 1...Be4
      • 2.Sf7#
    • 1...Bc6
      • 2.Sf7#
    • 1...Bb7
      • 2.Sf7#
    • 1...Bf7+
      • 2.Sxf7#
    • 1...Ba8
      • 2.Sf7#
    • 1...Sd2
      • 2.Qxc3#
  • Tries
    • 1.Qxc3+?
      • 1...Rd4
        • 2.Qxd4#
      • 1...Bxc3
        • 2.Bxd1#
        • 2.Be2#
        • 2.Bf3#
        • 2.Bg4#
      • 1...Sxc3!
  • Keys
    • 1.Qa8!
      • threat
        • 2.Sf7#
      • 1...Rg3+
        • 2.Bg4#
      • 1...Rc6+
        • 2.Se6#
      • 1...Bf7+
        • 2.Sxf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • B(e);N_GUARD::S(F)
    • B(e);CHECK,N_GUARD::S(F),XB(e)
    • S(a);N_GUARD,S_CUTB(c),S_CUTR(b)::QAB(A),XR(d)
  • Tries
    • Try
      • Q(A);CHECK,XR(d)
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::QAB(A),XR(b)
      • Refutation
        • S(a);XQ(A)
  • Actual
    • Q(A);N_PINR(d)
    • Threat
      • QAR(A)+S(F),DCHECK
    • Vars
      • R(d);CHECK,S_CUTB(c)::R(B)+B(C)
      • R(d);CHECK,S_CUTB(e)::QAR(A)+S(F)
      • B(e);CHECK::QAR(A)+S(F),DCHECK,XB(e)
HTML5 logo

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).