MESON Chess Problem Database

Problem Display
PID: 57606 (b5Bb/r1R2r2/pn6/1pNp4/2k2N1R/1pB1p3/1P4K1/4Q1n1 w - - 0 1)

Lin, Tien Ling

Chess Life, 1957

b5Bb/r1R2r2/pn6/1pNp4/2k2N1R/1pB1p3/1P4K1/4Q1n1

#2

9 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Rf5
      • 2.Sb7#
    • 1...Rg7+
      • 2.Sg6#
    • 1...Rf8
      • 2.Sb7#
    • 1...Bxc3
      • 2.Qxc3#
    • 1...Se2
      • 2.Qxe2#
    • 1...Sf3
      • 2.Qe2#
    • 1...Sh3
      • 2.Qe2#
    • 1...d4+
      • 2.Sb7#
  • Tries
    • 1.Sd7+?
      • 1...Bc6
        • 2.Rxc6#
      • 1...Rxc7!
    • 1.Qf1+?
      • 1...Se2
        • 2.Qxe2#
      • 1...e2!
  • Keys
    • 1.Ba5!
      • threat
        • 2.Qb4#
      • 1...Rg7+
        • 2.Sg6#
      • 1...d4+
        • 2.Sb7#
      • 1...Kd4
        • 2.Qc3#
      • 1...b4
        • 2.Qxb4#
      • 1...Bc3
        • 2.Qxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • R(j);N_GUARD,P_SPINP(f)::R(H)+S(G)
    • R(j);CHECK,N_GUARD,P_SPINP(f),S_CUTB(l)::R(F)+S(E)
    • B(l);OGATE,XB(D)::QAR1(A),XB(l)
    • S(a);N_GUARD::QAB(A),XS(a)
    • S(a);N_GUARD::QAB(A)
    • P(f);CHECK,P_SPINR(j)::R(H)+S(G)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • B(k);N_GUARD,P_SPINB(k)::R(H),XB(k)
      • Refutation
        • R(i);XR(H)
    • Try
      • Q(A);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB(A),XS(a)
      • Refutation
        • P(c);P_SPINP(c)
  • Actual
    • B(D);
    • Threat
      • QAR1(A)
    • Vars
      • R(j);CHECK,N_GUARD,P_SPINP(f),S_CUTB(l)::R(F)+S(E)
      • P(f);CHECK,P_SPINR(j),SBLOCK::R(H)+S(G)
      • K(d);P-FLIGHT::QAB1(A)
      • P(e);::QAR1(A),XP(e)
      • B(l);N_GUARD::QAR1(A),XB(l)
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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).