MESON Chess Problem Database

Problem Display
PID: 96594 (1qN5/2Q5/kB6/P7/K7/8/8/8 w - - 0 1)

Myhre, Gunnar Frode

Problemas, 1972

1qN5/2Q5/kB6/P7/K7/8/8/8

#2

5 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qa7
      • 2.Qxa7#
    • 1...Qxb6
      • 2.Qxb6#
    • 1...Qb7
      • 2.Qc4#
    • 1...Qxc8
      • 2.Qa7#
      • 2.Qxc8#
  • Keys
    • 1.Qc6!
      • 1...Qf4+
        • 2.Bd4#
      • 1...Qxb6
        • 2.Qxb6#
      • 1...Qxc8
        • 2.Qxc8#
      • 1...Qh2
        • 2.Bg1#
        • 2.Bf2#
        • 2.Be3#
        • 2.Bd4#
        • 2.Bc5#
        • 2.Ba7#
        • 2.Bc7#
        • 2.Bd8#
        • 2.Qa8#
      • 1...Qg3
        • 2.Bg1#
        • 2.Bf2#
        • 2.Be3#
        • 2.Bd4#
        • 2.Bc5#
        • 2.Ba7#
        • 2.Bc7#
        • 2.Bd8#
        • 2.Qa8#
      • 1...Qe5
        • 2.Bg1#
        • 2.Bf2#
        • 2.Be3#
        • 2.Bd4#
        • 2.Bc5#
        • 2.Ba7#
        • 2.Bc7#
        • 2.Bd8#
        • 2.Qa8#
      • 1...Qd6
        • 2.Qa8#
      • 1...Qa7
        • 2.Bxa7#
      • 1...Qc7
        • 2.Bxc7#
      • 1...Qb7
        • 2.Qb5#
        • 2.Qc4#
      • 1...Qa8
        • 2.Qxa8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • Q(b);N_GUARD::QAR1(D),XQ(b)
    • Q(b);OGATE,XB(C)::QAR1(D),XQ(b)
    • Q(b);SBLOCK::QAB(D)
  • Actual
    • Q(D);
    • Vars
      • Q(b);CHECK,N_GUARD::QAR(D)+B(C)
      • Q(b);OGATE,P_SPINQ(b),XB(C)::QAR1(D),XQ(b)
      • Q(b);OGATE,XS(E)::QAB(D),XQ(b)
      • Q(b);N_GUARD::QAR2(D)
      • Q(b);N_GUARD::QAR(D)+B(C),XQ(b)
      • Q(b);N_GUARD::QAR2(D),XQ(b)
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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).