MESON Chess Problem Database

Problem Display
PID: 95871 (8/8/8/4NRP1/4b1Bk/6p1/3K4/6Q1 w - - 0 1)

Vasta, Jan

Narodni Politika, 1912

8/8/8/4NRP1/4b1Bk/6p1/3K4/6Q1

#2

6 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.Qh1#
    • 1...Bh1
      • 2.Qxh1#
    • 1...Bc2
      • 2.Qh1#
    • 1...Bd3
      • 2.Qh1#
    • 1...g2
      • 2.Qf2#
      • 2.Qh2#
      • 2.Qe1#
  • Tries
    • 1.Qb6?
      • threat
        • 2.Qh6#
      • 1...g2
        • 2.Qf2#
      • 1...Bc6!
    • 1.g6?
      • threat
        • 2.Rh5#
      • 1...g2
        • 2.Qf2#
        • 2.Qh2#
        • 2.Qe1#
      • 1...Bxf5!
  • Keys
    • 1.Qd4!
      • 1...Bxf5
        • 2.Sf3#
      • 1...g2
        • 2.Qf2#
      • 1...Bg2
        • 2.Sg6#
      • 1...Bb1
        • 2.Sf3#
        • 2.Sg6#
      • 1...Bh1
        • 2.Sg6#
      • 1...Bc2
        • 2.Sf3#
        • 2.Sg6#
      • 1...Bd3
        • 2.Sf3#
        • 2.Sg6#
      • 1...Bf3
        • 2.Sxf3#
        • 2.Sg6#
      • 1...Bd5
        • 2.Sg6#
      • 1...Bc6
        • 2.Sg6#
      • 1...Bb7
        • 2.Sg6#
      • 1...Ba8
        • 2.Sg6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 3
  • Sets
    • B(b);N_GUARD::QAR(A)
    • B(b);N_GUARD::QAR(A),XB(b)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR2(A)
      • Vars
        • P(a);OGATEB::QAB(A)
      • Refutation
        • B(b);
    • Try
      • P(F);
      • Threat
        • R1(E)
      • Refutation
        • B(b);XR(E)
  • Actual
    • Q(A);
    • Vars
      • B(b);N_GUARD,XR(E)::S(D)
      • P(a);OGATEB::QAB(A)
      • B(b);::S(D)
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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).