MESON Chess Problem Database

Problem Display
PID: 187963 (8/8/8/7K/4pp1N/4N3/3n1pPk/1Q4br w - - 0 1)

Blatt, Ferenc

Pesti Naplo, 1910

8/8/8/7K/4pp1N/4N3/3n1pPk/1Q4br

#2

5 + 7

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Sxb1
      • 2.Sf1#
    • 1...Sf1
      • 2.Sxf1#
    • 1...Sb3
      • 2.Sf1#
    • 1...Sf3
      • 2.Sf1#
    • 1...Sc4
      • 2.Sf1#
    • 1...fxe3
      • 2.Qb8#
    • 1...f3
      • 2.Qb8#
  • Tries
    • 1.Qd3?
      • threat
        • 2.Sg4#
      • 1...Kg3
        • 2.Sf1#
      • 1...fxe3
        • 2.Qd6#
      • 1...Sf3
        • 2.Sf1#
      • 1...f3
        • 2.Qd6#
      • 1...exd3!
  • Keys
    • 1.Qb3!
      • threat
        • 2.Sg4#
      • 1...Kg3
        • 2.Sf1#
      • 1...Sxb3
        • 2.Sf1#
      • 1...fxe3
        • 2.Qb8#
      • 1...Sf3
        • 2.Sf1#
      • 1...f3
        • 2.Qb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • S(c);N_GUARD,XQ(A)::S(C)
    • S(c);N_GUARD::S(C),XS(c)
    • S(c);N_GUARD::S(C)
    • P(g);OGATEB,XS(C)::QAB(A)
    • P(g);OGATEB::QAB(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • S(C)
      • Vars
        • K(e);P_PINS(D),S_FLIGHT::QAR(A)+S(C),DCHECK
        • P(g);OGATEB,XS(C)::QAB(A)
        • S(c);N_GUARD::S(C)
        • P(g);OGATEB::QAB(A)
      • Refutation
        • P(f);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • S(C)
    • Vars
      • K(e);P_PINS(D),S_FLIGHT::QAR(A)+S(C),DCHECK
      • S(c);N_GUARD,XQ(A)::S(C)
      • P(g);OGATEB,XS(C)::QAB(A)
      • S(c);N_GUARD::S(C)
      • P(g);OGATEB::QAB(A)
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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).