MESON Chess Problem Database

Problem Display
PID: 214654 (4b3/4b3/1pRpkrNB/4p3/4B3/4R3/4Q3/4K3 w - - 0 1)

Anonymous

Detroit Free Press, 1878

4b3/4b3/1pRpkrNB/4p3/4B3/4R3/4Q3/4K3

#2

7 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bd7
      • 2.Qc4#
      • 2.Qa2#
  • Tries
    • 1.Bd5+?
      • 1...Kxd5
        • 2.Qc4#
      • 1...Kf5
        • 2.Sh4#
        • 2.Sxe7#
        • 2.Qh5#
      • 1...Kd7!
  • Keys
    • 1.Qg4+!
      • 1...Kf7
        • 2.Sh8#
      • 1...Rf5
        • 2.Qxf5#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(D);CHECK,N_PINP(c),P_PINP(a)
      • Vars
        • K(d);N_SPINP(a),S_FLIGHT,XB(D)::QAB1(B)
      • Refutation
        • K(d);N_SPINP(a),S_FLIGHT
  • Actual
    • Q(B);CHECK
    • Vars
      • K(d);N_SPINP(c),S_FLIGHT::S(F)
      • R(e);N_GUARD,P_SPINR(e)::QAB1(B),XR(e)
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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).