MESON Chess Problem Database

Problem Display
PID: 16831 (1R6/1Np2n2/1pkpP3/3p4/2bK4/N1Q5/2P5/8 w - - 0 1)

Ling, John Francis

Staffordshire Advertiser, 1943

1R6/1Np2n2/1pkpP3/3p4/2bK4/N1Q5/2P5/8

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Se5
      • 2.Sd8#
    • 1...Sg5
      • 2.Sd8#
    • 1...Sh6
      • 2.Sd8#
    • 1...Sd8
      • 2.Sxd8#
    • 1...Sh8
      • 2.Sd8#
    • 1...b5
      • 2.Sa5#
  • Tries
    • 1.Qb3?
      • 1...b5
        • 2.Sa5#
      • 1...Bf1
        • 2.Qxd5#
      • 1...Be2
        • 2.Qxd5#
      • 1...Bd3
        • 2.Qxd5#
      • 1...Bb5
        • 2.Qxd5#
        • 2.Qxb5#
      • 1...Ba6
        • 2.Qxd5#
      • 1...Se5
        • 2.Sd8#
      • 1...Sg5
        • 2.Sd8#
      • 1...Sh6
        • 2.Sd8#
      • 1...Sd8
        • 2.Sxd8#
      • 1...Sh8
        • 2.Sd8#
      • 1...Bxb3!
  • Keys
    • 1.Qa5!
      • 1...bxa5
        • 2.Sxa5#
      • 1...Bf1
        • 2.Qxd5#
      • 1...Ba2
        • 2.Qb5#
      • 1...Be2
        • 2.Qxd5#
      • 1...Bb3
        • 2.Qb5#
      • 1...Bd3
        • 2.Qxd5#
      • 1...Bb5
        • 2.Qxb5#
      • 1...Ba6
        • 2.Qxd5#
      • 1...Se5
        • 2.Sd8#
      • 1...Sg5
        • 2.Sd8#
      • 1...Sh6
        • 2.Sd8#
      • 1...Sd8
        • 2.Sxd8#
      • 1...Sh8
        • 2.Sd8#
      • 1...b5
        • 2.Qa6#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • S(g);N_GUARD::S(F)
    • S(g);N_GUARD::S(F),XS(g)
    • P(c);N_GUARD::S(F)
  • Tries
    • Try
      • Q(C);N_PINB(a)
      • Vars
        • P(c);N_GUARD::S(F)
        • B(a);OGATE::QAB1(C),XP(b)
        • S(g);N_GUARD::S(F)
        • S(g);N_GUARD::S(F),XS(g)
      • Refutation
        • B(a);XQ(C)
  • Actual
    • Q(C);N_PINB(a)
    • Vars
      • P(c);XQ(C)::S(F),XP(c)
      • B(a);N_GUARD::QAB1(C),XP(b)
      • B(a);N_GUARD::QAB1(C)
      • B(a);N_GUARD::QAB1(C),XB(a)
      • S(g);N_GUARD::S(F)
      • S(g);N_GUARD::S(F),XS(g)
      • P(c);OGATEB::QAR2(C)
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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).