MESON Chess Problem Database

Problem Display
PID: 4941 (8/3P1k1N/5B1p/7K/8/8/b7/5Q2 w - - 0 1)

Cisar, Vaclav

Nove mody, 1894

8/3P1k1N/5B1p/7K/8/8/b7/5Q2

#2

5 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.Qc4#
    • 1...Bc4
      • 2.Qxc4#
  • Tries
    • 1.Sg5+?
      • 1...Kf8
        • 2.d8Q#
        • 2.d8R#
      • 1...Kg8
        • 2.d8Q#
        • 2.d8R#
      • 1...hxg5!
    • 1.d8S+?
      • 1...Ke8
        • 2.Qb5#
      • 1...Kg8!
  • Keys
    • 1.Qd3!
      • 1...Ke6
        • 2.d8S#
      • 1...Kg8
        • 2.Qg6#
      • 1...Bb1
        • 2.Qc4#
        • 2.Qb3#
        • 2.Qd5#
      • 1...Bb3
        • 2.Qxb3#
      • 1...Bc4
        • 2.Qxc4#
      • 1...Bd5
        • 2.Qxd5#
      • 1...Be6
        • 2.Qg6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • B(a);N_GUARD::QAB(A)
    • B(a);N_GUARD::QAB(A),XB(a)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(c);P-FLIGHT::P=Q
        • K(c);S_FLIGHT::P=Q
      • Refutation
        • P(b);XS(E)
    • Try
      • P(D);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB(A)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(c);S_FLIGHT::P=S
      • K(c);S_FLIGHT::QAR2(A)
      • B(a);N_GUARD::QAB(A),XB(a)
      • B(a);SBLOCK::QAB1(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).