MESON Chess Problem Database

Problem Display
PID: 108036 (8/3K4/2N5/2pk1pNp/5p1R/BPn1p3/2P3n1/4b1Q1 w - - 0 1)

Farebrother, AE

La Presse, 1935

8/3K4/2N5/2pk1pNp/5p1R/BPn1p3/2P3n1/4b1Q1

#2

8 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sb1
      • 2.c4#
    • 1...Sd1
      • 2.c4#
    • 1...Sa2
      • 2.c4#
    • 1...Se2
      • 2.c4#
    • 1...Sa4
      • 2.c4#
    • 1...Se4
      • 2.c4#
    • 1...Sb5
      • 2.c4#
    • 1...e2
      • 2.Qxc5#
  • Tries
    • 1.Sh7?
      • threat
        • 2.Sf6#
      • 1...Ke4
        • 2.Qxg2#
      • 1...Se4
        • 2.c4#
      • 1...Bxh4!
    • 1.Qf1?
      • threat
        • 2.Qd3#
        • 2.Qc4#
      • 1...Se2
        • 2.Qf3#
        • 2.c4#
      • 1...Sb5
        • 2.Qc4#
        • 2.Qf3#
        • 2.c4#
      • 1...c4
        • 2.Qxc4#
        • 2.bxc4#
      • 1...e2!
    • 1.Qxg2+?
      • 1...Se4
        • 2.c4#
      • 1...f3!
  • Keys
    • 1.Se4!
      • threat
        • 2.Sf6#
      • 1...Kxe4
        • 2.Qxg2#
      • 1...Bxh4
        • 2.Sxc3#
      • 1...Sxe4
        • 2.c4#
      • 1...fxe4
        • 2.Rxh5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • S(c);OGATE::P(B)
    • P(d);OGATE::QAR1(A),XP(f)
  • Tries
    • Try
      • S(F);
      • Threat
        • S(F)
      • Vars
        • K(g);P_SPINP(e),S_FLIGHT::QAB(A),XS(b)
        • S(c);OGATE,SBLOCK::P(B)
      • Refutation
        • B(a);XR(E)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Refutation
        • P(d);
    • Try
      • Q(A);CHECK,XS(b)
      • Vars
        • S(c);OGATE,P_SPINS(c)::P(B)
      • Refutation
        • P(e);P_SPINP(e)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • K(g);OGATEB,P_SPINP(e),S_FLIGHT,XS(F)::QAB(A),XS(b)
      • B(a);N_GUARD,XR(E)::S(F),XS(c)
      • S(c);OGATE,SBLOCK,XS(F)::P(B)
      • P(h);OGATEB,SBLOCK,XS(F)::R(E),XP(i)
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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).