MESON Chess Problem Database

Problem Display
PID: 57363 (3BRN1r/2K1PP1p/3nBk1P/1p1P1bp1/1Pn3R1/8/7Q/8 w - - 0 1)

Meschick, AG

5th Comm., Brisbane Courier, 1920

3BRN1r/2K1PP1p/3nBk1P/1p1P1bp1/1Pn3R1/8/7Q/8

#2

12 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf8
      • 2.exf8S#
    • 1...Rg8
      • 2.fxg8S#
    • 1...Bg6
      • 2.Sd7#
    • 1...Sb2
      • 2.Qxb2#
    • 1...Sa3
      • 2.Qb2#
    • 1...Se3
      • 2.Qb2#
    • 1...Sa5
      • 2.Qb2#
    • 1...Sb6
      • 2.Qb2#
    • 1...Sxe8+
      • 2.fxe8S#
  • Tries
    • 1.Qe5+?
      • 1...Kxe5
        • 2.Sd7#
      • 1...Sxe5!
  • Keys
    • 1.Qf4!
      • 1...Sxe8+
        • 2.fxe8S#
      • 1...Rxf8
        • 2.exf8S#
      • 1...Sxf7
        • 2.Qxf5#
      • 1...gxf4
        • 2.Sd7#
      • 1...Rg8
        • 2.fxg8S#
      • 1...Sb2
        • 2.Qd4#
      • 1...Sd2
        • 2.Qd4#
      • 1...Sa3
        • 2.Qd4#
      • 1...Se3
        • 2.Qd4#
      • 1...Sa5
        • 2.Qd4#
      • 1...Se5
        • 2.Qxg5#
      • 1...Sb6
        • 2.Qd4#
      • 1...Se4
        • 2.Qxf5#
      • 1...Sb7
        • 2.Qxf5#
      • 1...Sc8
        • 2.Qxf5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 5
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • R(h);OGATE,XS(L)::PXR(h)=S
    • R(h);OGATE::PXR(h)=S
    • B(c);SBLOCK::S(L)
    • S(a);N_GUARD::QAB(A),XS(a)
    • S(a);N_GUARD::QAB(A)
    • S(e);CHECK,OGATE,XR(K)::PXS(e)=S
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(f);S_FLIGHT,XQ(A)::S(L)
      • Refutation
        • S(a);XQ(A)
  • Actual
    • Q(A);P_PINB(c)
    • Vars
      • S(e);CHECK,OGATE,XR(K)::PXS(e)=S
      • R(h);OGATE,XS(L)::PXR(h)=S
      • S(e);N_GUARD,XP(I)::QAR1(A),XB(c)
      • P(d);N_SPINB(c),XQ(A)::S(L)
      • R(h);OGATE::PXR(h)=S
      • S(a);N_GUARD::QAB(A)
      • S(a);SBLOCK::QAB1(A),XP(d)
      • S(e);N_GUARD::QAR1(A),XB(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).