MESON Chess Problem Database

Problem Display
PID: 222819 (8/1n2p1N1/8/2pkpp1R/Q7/3B4/6N1/K7 w - - 0 1)

Sherrard, Hugh William

Illustrated London News, 1884

8/1n2p1N1/8/2pkpp1R/Q7/3B4/6N1/K7

#2

6 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sa5
      • 2.Qd7#
    • 1...Sd6
      • 2.Se3#
    • 1...Sd8
      • 2.Qd7#
  • Tries
    • 1.Sf4+?
      • 1...Kd6
        • 2.Se8#
      • 1...exf4!
    • 1.Be4+?
      • 1...Kd6
        • 2.Qc6#
      • 1...fxe4!
  • Keys
    • 1.Se8!
      • 1...Ke6
        • 2.Bc4#
      • 1...c4
        • 2.Qxc4#
      • 1...e4
        • 2.Qxe4#
      • 1...Sa5
        • 2.Qd7#
      • 1...Sd6
        • 2.Sc7#
      • 1...Sd8
        • 2.Qd7#
      • 1...f4
        • 2.Sxf4#
      • 1...e6
        • 2.Se3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(e);N_GUARD::QAR2(D)
    • S(e);SBLOCK::S(B)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(b);P-FLIGHT::S(F)
      • Refutation
        • P(c);P_SPINP(d),XS(B)
    • Try
      • B(C);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(D)
      • Refutation
        • P(d);P_SPINP(c),XB(C)
  • Actual
    • S(F);
    • Vars
      • K(b);S_FLIGHT::B(C)
      • P(a);::QAB1(D),XP(a)
      • P(c);P_SPINP(d)::QAB1(D),XP(c)
      • S(e);N_GUARD::QAR2(D)
      • S(e);SBLOCK::S(F)
      • P(d);P_SPINP(c)::S(B),XP(d)
      • P(f);SBLOCK::S(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).