MESON Chess Problem Database

Problem Display
PID: 9785 (8/5N2/2p1p2r/2p4p/2Bpk1n1/5R2/QK2p3/2n2Rr1 w - - 0 1)

Blake, Percy Francis

Western Daily Mercury, 1909

8/5N2/2p1p2r/2p4p/2Bpk1n1/5R2/QK2p3/2n2Rr1

#2

6 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Sd3+
      • 2.Bxd3#
    • 1...Se3
      • 2.Rf4#
    • 1...Se5
      • 2.Sd6#
    • 1...e5
      • 2.Sg5#
  • Tries
    • 1.Qb1+?
      • 1...Sd3+
        • 2.Qxd3#
      • 1...d3!
  • Keys
    • 1.Bb5!
      • threat
        • 2.Bxc6#
      • 1...Sd3+
        • 2.Bxd3#
      • 1...cxb5
        • 2.Qa8#
      • 1...d3
        • 2.Qc4#
      • 1...Se3
        • 2.Rf4#
      • 1...Se5
        • 2.Sd6#
      • 1...Sf6
        • 2.Qxe6#
      • 1...e5
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(a);CHECK,N_GUARD::B(E),XS(a)
    • S(f);SBLOCK::R1(D)
    • S(f);SBLOCK::S(F)
    • P(j);SBLOCK::S(F)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • S(a);CHECK,N_GUARD,P_SPINS(a)::QAB1(B),XS(a)
      • Refutation
        • P(d);P_SPINP(d)
  • Actual
    • B(E);
    • Threat
      • B(E),XP(i)
    • Vars
      • S(a);CHECK,N_GUARD::B(E),XS(a)
      • P(i);OGATEB,XB(E)::QAB(B)
      • P(d);OGATEB::QAR2(B)
      • S(f);SBLOCK::R1(D)
      • S(f);SBLOCK::S(F)
      • S(f);N_GUARD,S_CUTR(k)::QAR2(B),XP(j)
      • P(j);SBLOCK::S(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).