MESON Chess Problem Database

Problem Display
PID: 82507 (8/5Q1B/8/1K3P2/4k3/4nNp1/1BP3P1/8 w - - 0 1)

Havel, Miroslav

Prager Presse, 1921

8/5Q1B/8/1K3P2/4k3/4nNp1/1BP3P1/8

#2

8 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Qe8+?
      • 1...Kd5
        • 2.Qc6#
        • 2.Qe5#
        • 2.Qe6#
      • 1...Kf4!
    • 1.Qe7+?
      • 1...Kd5
        • 2.Bg8#
        • 2.Qe5#
        • 2.Qe6#
      • 1...Kf4!
  • Keys
    • 1.Bc1!
      • 1...Kf4
        • 2.Qc4#
      • 1...Sxc2
        • 2.f6#
      • 1...Sxg2
        • 2.Qb7#
      • 1...Sxf5
        • 2.Bxf5#
        • 2.Qc4#
        • 2.Qe6#
        • 2.Qxf5#
        • 2.Qb7#
      • 1...Sd1
        • 2.Qc4#
        • 2.Qe6#
        • 2.Qb7#
        • 2.f6#
      • 1...Sf1
        • 2.Qc4#
        • 2.Qe6#
        • 2.Qb7#
        • 2.f6#
      • 1...Sc4
        • 2.Qxc4#
        • 2.Qb7#
        • 2.f6#
      • 1...Sg4
        • 2.Qc4#
        • 2.Qb7#
        • 2.f6#
      • 1...Sd5
        • 2.Qe6#
        • 2.f6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(G);CHECK
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(G);CHECK
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • B(A);
    • Vars
      • K(c);P-FLIGHT,P_SPINS(a)::QAR(G)
      • S(a);N_GUARD,XP(B)::B(H)+P(F)
      • S(a);N_GUARD,XP(C)::QAB(G)
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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).