MESON Chess Problem Database

Problem Display
PID: 153514 (BnrN2b1/8/3PP2K/Ppk1B2R/1p3R2/1P2r1p1/4p3/2b3Q1 w - - 0 1)

Godfrey, Frederick Earle

Good Companions (February), 1916

BnrN2b1/8/3PP2K/Ppk1B2R/1p3R2/1P2r1p1/4p3/2b3Q1

#2

11 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Ba3
      • 2.Qxe3#
    • 1...Bxe6
      • 2.Sxe6#
  • Tries
    • 1.Sf7?
      • threat
        • 2.Ba1#
        • 2.Bb2#
        • 2.Bc3#
        • 2.Bd4#
        • 2.Bf6#
        • 2.Bg7#
        • 2.Bh8#
      • 1...Sc6
        • 2.Bd4#
      • 1...Bb2
        • 2.Bxb2#
        • 2.Bc3#
        • 2.Bd4#
      • 1...Bh7
        • 2.Bd4#
      • 1...Sd7
        • 2.Bd4#
      • 1...Bxf7!
  • Keys
    • 1.Rd4!
      • threat
        • 2.Rd5#
      • 1...Rxb3+
        • 2.Bf4#
      • 1...Rc3+
        • 2.Bf4#
      • 1...Rd3+
        • 2.Bf4#
      • 1...Rf3+
        • 2.Bf4#
      • 1...Re4+
        • 2.Qxc1#
      • 1...Rxe5+
        • 2.Rd2#
      • 1...Bxe6
        • 2.Sxe6#
      • 1...Rc6
        • 2.Sb7#
      • 1...Sc6
        • 2.Sb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 1
  • Sets
    • B(a);N_GUARD::QAB(A),XR(c)
    • B(j);XP(H)::S(K),XB(j)
  • Tries
    • Try
      • S(K);
      • Threat
        • DUALS(7)
      • Vars
        • S(h);::R(F)+B(E),DCHECK
        • B(j);::R(F)+B(E),DCHECK
      • Refutation
        • B(j);XS(K)
  • Actual
    • R(C);N_PINR(c)
    • Threat
      • R1(C)
    • Vars
      • R(c);CHECK,N_GUARD,XP(B)::R(F)+B(E)
      • R(c);CHECK,N_GUARD::R(F)+B(E)
      • R(c);CHECK,N_GUARD::QAR(A),XB(a)
      • R(c);CHECK,OGATEB,P_SPINR(c),XB(E)::QAB(A)+R(C)
      • B(j);XP(H)::S(K),XB(j)
      • R(i);SBLOCK::S(K)
      • S(h);SBLOCK::S(K)
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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).