MESON Chess Problem Database

Problem Display
PID: 6078 (8/8/2n1Np2/5B2/6p1/2p2k2/2Np4/3K2Qb w - - 0 1)

Lester, William Edward

The Problemist, 1926

8/8/2n1Np2/5B2/6p1/2p2k2/2Np4/3K2Qb

#2

5 + 7

56 The Problemist 2006

SOLUTION

  • SOUND
  • Sets
    • 1...Bg2
      • 2.Qe3#
    • 1...Sb4
      • 2.Scd4#
    • 1...Sd4
      • 2.Scxd4#
    • 1...Sa5
      • 2.Scd4#
    • 1...Se5
      • 2.Scd4#
    • 1...Sa7
      • 2.Scd4#
    • 1...Se7
      • 2.Scd4#
    • 1...Sb8
      • 2.Scd4#
    • 1...Sd8
      • 2.Scd4#
    • 1...g3
      • 2.Qf1#
  • Tries
    • 1.Sed4+?
      • 1...Kf4
        • 2.Qe3#
      • 1...Sxd4!
  • Keys
    • 1.Qh2!
      • 1...Bg2
        • 2.Qf4#
      • 1...Sb4
        • 2.Sed4#
      • 1...Sd4
        • 2.Sexd4#
      • 1...Sa5
        • 2.Sed4#
      • 1...Se5
        • 2.Sed4#
      • 1...Sa7
        • 2.Sed4#
      • 1...Se7
        • 2.Sed4#
      • 1...Sb8
        • 2.Sed4#
      • 1...Sd8
        • 2.Sed4#
      • 1...g3
        • 2.Qe2#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 10
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • B(a);SBLOCK::QAR1(B)
    • S(f);N_GUARD::S(C)
    • S(f);N_GUARD::S(C),XS(f)
    • P(e);SBLOCK::QAR2(B)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(d);P-FLIGHT::QAB1(B)
      • Refutation
        • S(f);XS(E)
  • Actual
    • Q(B);
    • Vars
      • B(a);SBLOCK::QAR1(B)
      • S(f);N_GUARD::S(E)
      • S(f);N_GUARD::S(E),XS(f)
      • P(e);SBLOCK::QAB1(B)
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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).