MESON Chess Problem Database

Problem Display
PID: 189433 (2B1k1N1/1p2P3/1n1pP3/6n1/6K1/8/6Q1/8 w - - 0 1)

Volf, Josef

Union, 1911

2B1k1N1/1p2P3/1n1pP3/6n1/6K1/8/6Q1/8

#2

6 + 5

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Sa4
      • 2.Bd7#
    • 1...Sc4
      • 2.Bd7#
    • 1...Sd5
      • 2.Bd7#
    • 1...Sd7
      • 2.Bxd7#
    • 1...Sa8
      • 2.Bd7#
  • Tries
    • 1.Qc6+?
      • 1...Sd7
        • 2.Bxd7#
        • 2.Qxd7#
      • 1...bxc6!
  • Keys
    • 1.Qd5!
      • 1...Sxe6
        • 2.Qh5#
      • 1...Sxd5
        • 2.Bd7#
      • 1...Sxc8
        • 2.Qb5#
      • 1...Sf7
        • 2.exf7#
      • 1...Sf3
        • 2.Qh5#
      • 1...Sh3
        • 2.Qh5#
      • 1...Se4
        • 2.Qh5#
      • 1...Sh7
        • 2.Qh5#
      • 1...Sa4
        • 2.Bd7#
        • 2.Qb5#
      • 1...Sc4
        • 2.Bd7#
        • 2.Qb5#
      • 1...Sd7
        • 2.Bxd7#
        • 2.exd7#
      • 1...Sa8
        • 2.Bd7#
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 4
  • Sets
    • S(b);N_GUARD::B(E)
    • S(b);N_GUARD::B(E),XS(b)
  • Tries
    • Try
      • Q(A);CHECK
      • Refutation
        • P(d);XQ(A)
  • Actual
    • Q(A);
    • Vars
      • S(a);OGATE,XP(C)::QAB(A)
      • S(b);N_GUARD,XQ(A)::B(E)
      • S(b);N_GUARD,XB(E)::QAB(A)
      • S(a);OGATE::P(C),XS(a)
      • S(a);OGATE::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).