MESON Chess Problem Database

Problem Display
PID: 154520 (3RR3/4q3/8/6B1/8/3B4/1P6/K2k4 w - - 0 1)

Hannemann, Knud Harald

Dagens Nyheder, 1935

3RR3/4q3/8/6B1/8/3B4/1P6/K2k4

#2

6 + 2

4035 Aarsskrift for DSK 1935

SOLUTION

  • SOUND
  • Sets
    • 1...Qh7
      • 2.Bxh7#
  • Tries
    • 1.Bc4+?
      • 1...Ke1
        • 2.Bh4#
      • 1...Qd6
        • 2.Bb3#
      • 1...Qxd8
        • 2.Bb3#
      • 1...Qd7
        • 2.Bb3#
      • 1...Kc2!
  • Keys
    • 1.Bb5+!
      • 1...Ke1
        • 2.Bh4#
      • 1...Kc2
        • 2.Ba4#
      • 1...Qd6
        • 2.Ba4#
      • 1...Qxd8
        • 2.Ba4#
      • 1...Qd7
        • 2.Ba4#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • Q(b);N_GUARD::R(E)+B(C),XQ(b)
  • Tries
    • Try
      • B(C);CHECK
      • Vars
        • K(a);P-FLIGHT,P_SPINQ(b)::B(D)
        • Q(b);P_SPINQ(b)::B(C)
        • Q(b);XR(E)::B(C)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • B(C);CHECK
    • Vars
      • K(a);P-FLIGHT,P_SPINQ(b)::B(D)
      • K(a);S_FLIGHT::B(C)
      • Q(b);P_SPINQ(b)::B(C)
      • Q(b);XR(E)::B(C)
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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).