MESON Chess Problem Database

Problem Display
PID: 64450 (7b/5p2/1Q2Np2/1B3k1P/2b2P2/1n1p2K1/3P4/8 w - - 0 1)

Widdows, TH

Chess, 1947

7b/5p2/1Q2Np2/1B3k1P/2b2P2/1n1p2K1/3P4/8

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Bxe6
      • 2.Bxd3#
  • Tries
    • 1.Qc6?
      • 1...Bxb5
        • 2.Qd5#
      • 1...Bxe6
        • 2.Bxd3#
      • 1...Sxd2
        • 2.Sd4#
      • 1...Bd5
        • 2.Qxd5#
      • 1...Bg7
        • 2.Sxg7#
      • 1...Sa1
        • 2.Sd4#
      • 1...Sc1
        • 2.Sd4#
      • 1...Sd4
        • 2.Sxd4#
      • 1...Sa5
        • 2.Sd4#
      • 1...Sc5
        • 2.Sd4#
      • 1...fxe6!
  • Keys
    • 1.Qb7!
      • 1...Kxe6
        • 2.Qd7#
      • 1...Bxb5
        • 2.Qd5#
      • 1...Bxe6
        • 2.Bxd3#
      • 1...Sxd2
        • 2.Sd4#
      • 1...fxe6
        • 2.Qh7#
      • 1...Bd5
        • 2.Qxd5#
      • 1...Bg7
        • 2.Sxg7#
      • 1...Sa1
        • 2.Sd4#
      • 1...Sc1
        • 2.Sd4#
      • 1...Sd4
        • 2.Sxd4#
      • 1...Sa5
        • 2.Sd4#
      • 1...Sc5
        • 2.Sd4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
    • B(c);OGATE,XS(G)::B(D),XP(b)
  • Tries
    • Try
      • Q(F);
      • Vars
        • B(c);N_GUARD,XB(D)::QAR2(F)
        • B(c);OGATE,XS(G)::B(D),XP(b)
        • S(a);N_GUARD,XP(A)::S(G)
        • B(c);N_GUARD::QAR2(F),XB(c)
        • B(g);N_GUARD::S(G),XB(g)
        • S(a);N_GUARD::S(G)
        • S(a);N_GUARD::S(G),XS(a)
      • Refutation
        • P(f);XS(G)
  • Actual
    • Q(F);
    • Vars
      • K(d);OGATEB,S_FLIGHT,XS(G)::QAB1(F)
      • B(c);N_GUARD,XB(D)::QAR2(F)
      • B(c);OGATE,SBLOCK,XS(G)::B(D),XP(b)
      • S(a);N_GUARD,XP(A)::S(G)
      • P(f);OGATE,SBLOCK,XS(G)::QAB(F)
      • B(c);N_GUARD::QAR2(F),XB(c)
      • B(g);N_GUARD::S(G),XB(g)
      • S(a);N_GUARD::S(G)
      • S(a);N_GUARD::S(G),XS(a)
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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).