Problem Display
PID: 54042 (k7/1p6/1p6/1p6/8/8/3Q1K2/2B5 w - - 0 1)

Dobler, K

Schach-Echo, 1933

k7/1p6/1p6/1p6/8/8/3Q1K2/2B5

#3

3 + 4


5454 Near Snap 2022

SOLUTION


  • SOUND
  • Tries
    • 1.Qc3?
      • threat
        • 2.Bf4
          • threat
            • 3.Qa1#
            • 3.Qa3#
          • 2...Ka7
            • 3.Qa1#
            • 3.Qa3#
      • 1...Ka7
        • 2.Bf4
          • threat
            • 3.Qa1#
            • 3.Qa3#
          • 2...Ka6
            • 3.Qa1#
            • 3.Qa3#
          • 2...Ka8
            • 3.Qa1#
            • 3.Qa3#
      • 1...Kb8
        • 2.Bf4+
          • 2...Ka7
            • 3.Qa1#
            • 3.Qa3#
          • 2...Ka8
            • 3.Qa1#
            • 3.Qa3#
      • 1...b4!
    • 1.Qb4?
      • threat
        • 2.Bf4
          • 2...Ka7
            • 3.Qa3#
      • 1...Ka7
        • 2.Bf4
          • threat
            • 3.Qa3#
          • 2...Ka6
            • 3.Qa3#
          • 2...Ka8
            • 3.Qa3#
      • 1...Kb8!
    • 1.Qd1?
      • threat
        • 2.Bf4
          • threat
            • 3.Qa1#
          • 2...Ka7
            • 3.Qa1#
      • 1...Ka7
        • 2.Bf4
          • threat
            • 3.Qa1#
          • 2...Ka6
            • 3.Qa1#
          • 2...Ka8
            • 3.Qa1#
      • 1...b4
        • 2.Bf4
          • threat
            • 3.Qa4#
            • 3.Qa1#
          • 2...Ka7
            • 3.Qa4#
            • 3.Qa1#
      • 1...Kb8!
    • 1.Qb2?
      • threat
        • 2.Bf4
          • threat
            • 3.Qa1#
            • 3.Qa3#
            • 3.Qa2#
          • 2...Ka7
            • 3.Qa1#
            • 3.Qa3#
            • 3.Qa2#
      • 1...Ka7
        • 2.Bf4
          • threat
            • 3.Qa1#
            • 3.Qa3#
            • 3.Qa2#
          • 2...Ka6
            • 3.Qa1#
            • 3.Qa3#
            • 3.Qa2#
          • 2...Ka8
            • 3.Qa1#
            • 3.Qa3#
            • 3.Qa2#
      • 1...b4
        • 2.Bf4
          • threat
            • 3.Qa1#
            • 3.Qa2#
          • 2...Ka7
            • 3.Qa1#
            • 3.Qa2#
      • 1...Kb8!
    • 1.Qc2?
      • threat
        • 2.Bf4
          • threat
            • 3.Qa2#
          • 2...Ka7
            • 3.Qa2#
      • 1...Ka7
        • 2.Bf4
          • threat
            • 3.Qa2#
          • 2...Ka6
            • 3.Qa2#
          • 2...Ka8
            • 3.Qa2#
      • 1...Kb8
        • 2.Bf4+
          • 2...Ka7
            • 3.Qa2#
          • 2...Ka8
            • 3.Qa2#
      • 1...b4!
    • 1.Qe2?
      • threat
        • 2.Bf4
          • threat
            • 3.Qa2#
          • 2...Ka7
            • 3.Qa2#
      • 1...Ka7
        • 2.Bf4
          • threat
            • 3.Qa2#
          • 2...Ka6
            • 3.Qa2#
          • 2...Ka8
            • 3.Qa2#
      • 1...Kb8
        • 2.Bf4+
          • 2...Ka7
            • 3.Qa2#
          • 2...Ka8
            • 3.Qa2#
          • 2...Kc8
            • 3.Qe8#
      • 1...b4!
    • 1.Qd4?
      • threat
        • 2.Bf4
          • threat
            • 3.Qa1#
          • 2...Ka7
            • 3.Qa1#
      • 1...Ka7
        • 2.Bf4
          • threat
            • 3.Qa1#
          • 2...Ka6
            • 3.Qa1#
          • 2...Ka8
            • 3.Qa1#
      • 1...Kb8!
  • Keys
    • 1.Qe1!
      • threat
        • 2.Bf4
          • threat
            • 3.Qa1#
          • 2...Ka7
            • 3.Qa1#
      • 1...Ka7
        • 2.Bf4
          • threat
            • 3.Qa1#
          • 2...Ka6
            • 3.Qa1#
          • 2...Ka8
            • 3.Qa1#
      • 1...Kb8
        • 2.Bf4+
          • 2...Ka7
            • 3.Qa1#
          • 2...Ka8
            • 3.Qa1#
          • 2...Kc8
            • 3.Qe8#

Anticipated by 13840(1913)

FEATURES


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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).