MESON Chess Problem Database

Problem Display
PID: 214533 (7B/5p1P/5n2/2Ppk2p/1Q3N1P/8/3P1N2/1Bn4K w - - 0 1)

Berger, Johann Nepomuk

Detroit Free Press, 1878

7B/5p1P/5n2/2Ppk2p/1Q3N1P/8/3P1N2/1Bn4K

#2

10 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...d4
      • 2.Qb8#
  • Tries
    • 1.Bg6?
      • 1...d4
        • 2.Qb8#
      • 1...Sa2
        • 2.S2d3#
      • 1...Se2
        • 2.S2d3#
      • 1...Sb3
        • 2.S2d3#
      • 1...Sd3
        • 2.S2xd3#
      • 1...fxg6!
    • 1.Qc3+?
      • 1...Kxf4
        • 2.Qe3#
      • 1...d4!
    • 1.Qb2+?
      • 1...d4
        • 2.Qb8#
      • 1...Kxf4!
  • Keys
    • 1.Be4!
      • 1...Kxf4
        • 2.Qb8#
      • 1...dxe4
        • 2.Qxe4#
      • 1...Sa2
        • 2.S2d3#
      • 1...Se2
        • 2.S2d3#
      • 1...Sb3
        • 2.S2d3#
      • 1...Sd3
        • 2.S2xd3#
      • 1...d4
        • 2.Qb8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • P(b);SBLOCK::QAB(E)
  • Tries
    • Try
      • B(A);
      • Vars
        • P(b);SBLOCK::QAB(E)
        • S(a);N_GUARD::S(D)
        • S(a);N_GUARD::S(D),XS(a)
      • Refutation
        • P(f);XB(A)
    • Try
      • Q(E);CHECK
      • Vars
        • K(c);N_SPINS(e),S_FLIGHT,XS(F)::QAB1(E)
      • Refutation
        • P(b);P_SPINP(b)
    • Try
      • Q(E);CHECK
      • Vars
        • P(b);P_SPINP(b),SBLOCK::QAB(E)
      • Refutation
        • K(c);N_SPINS(e),S_FLIGHT,XS(F)
  • Actual
    • B(A);
    • Vars
      • K(c);N_SPINS(e),S_FLIGHT,XS(F)::QAB(E)
      • P(b);OGATE,XB(A)::QAR1(E),XP(b)
      • S(a);N_GUARD::S(D)
      • S(a);N_GUARD::S(D),XS(a)
      • P(b);SBLOCK::QAB(E)
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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).