MESON Chess Problem Database

Problem Display
PID: 224642 (6Q1/5p2/3p1P2/3P1k2/2N1N2p/4Pn1p/3p3P/3B3K w - - 0 1)

Stal, Karl Alfred

Charleston Sunday News, 1887

6Q1/5p2/3p1P2/3P1k2/2N1N2p/4Pn1p/3p3P/3B3K

#2

9 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Se1
      • 2.Qh7#
      • 2.Qg4#
    • 1...Sg1
      • 2.Qh7#
      • 2.Qg4#
    • 1...Sxh2
      • 2.Qh7#
    • 1...Sd4
      • 2.Qh7#
      • 2.Qg4#
    • 1...Se5
      • 2.Scxd6#
  • Tries
    • 1.Qg5+?
      • 1...Kxe4
        • 2.Bc2#
      • 1...Sxg5!
  • Keys
    • 1.Qxf7!
      • 1...Kxe4
        • 2.Bc2#
      • 1...Kg4
        • 2.Qg6#
      • 1...Sxh2
        • 2.Qh7#
      • 1...Se1
        • 2.Qh7#
      • 1...Sg1
        • 2.Qh7#
      • 1...Sd4
        • 2.Qh7#
      • 1...Se5
        • 2.Scxd6#
      • 1...Sg5
        • 2.Sexd6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(b);XP(C)::QAB(I)
    • S(b);SBLOCK::S(E),XP(f)
  • Tries
    • Try
      • Q(I);CHECK
      • Vars
        • K(e);S_FLIGHT,XS(F)::B(A)
      • Refutation
        • S(b);XQ(I)
  • Actual
    • Q(I);XP(g)
    • Vars
      • K(e);OGATEB,S_FLIGHT,XS(F)::B(A)
      • K(e);P_SPINS(b),S_FLIGHT::QAR2(I)
      • S(b);XP(C)::QAB(I)
      • S(b);::QAB(I)
      • S(b);SBLOCK::S(E),XP(f)
      • S(b);SBLOCK::S(F),XP(f)
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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).