MESON Chess Problem Database

Problem Display
PID: 15303 (8/bk6/1p2B3/3R4/6K1/8/8/Q7 w - - 0 1)

Auhagen, Ulrich Otto Ferdinand

Deutsche Schachzeitung, 1982

8/bk6/1p2B3/3R4/6K1/8/8/Q7

#2

4 + 3

3295 Einfuhrung in die Welt des Schachproblem 1984

SOLUTION

  • SOUND
  • Tries
    • 1.Rd7+?
      • 1...Ka8
        • 2.Qxa7#
      • 1...Kb8
        • 2.Qh8#
      • 1...Kc8
        • 2.Qh8#
      • 1...Kc6!
    • 1.Qg7+?
      • 1...Ka6
        • 2.Bc8#
      • 1...Kc6
        • 2.Qd7#
      • 1...Kb8
        • 2.Rd8#
      • 1...Ka8!
    • 1.Qxa7+?
      • 1...Kc6
        • 2.Qd7#
      • 1...Kxa7!
  • Keys
    • 1.Qa6+!
      • 1...Kxa6
        • 2.Bc8#
      • 1...Kc6
        • 2.Qc8#
      • 1...Kc7
        • 2.Qc8#
      • 1...Ka8
        • 2.Rd8#
      • 1...Kb8
        • 2.Qc8#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • K(c);P_SPINB(b),S_FLIGHT::QAR1(A),XB(b)
        • K(c);P-FLIGHT::QAR(A)
        • K(c);S_FLIGHT::QAR(A)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);S_FLIGHT::B(D)
        • K(c);S_FLIGHT::QAB1(A)
        • K(c);P-FLIGHT::R(C)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);CHECK,XB(b)
      • Vars
        • K(c);OGATE,S_FLIGHT::QAB1(A)
      • Refutation
        • K(c);P-FLIGHT,XQ(A)
  • Actual
    • Q(A);CHECK
    • Vars
      • K(c);S_FLIGHT,XQ(A)::B(D)
      • K(c);OGATE,P_SPINP(a),S_FLIGHT::QAR2(A)
      • K(c);OGATE,P-FLIGHT::QAR1(A)
      • K(c);P_SPINB(b),S_FLIGHT::R(C)
HTML5 logo

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).