MESON Chess Problem Database

Problem Display
PID: 157416 (Q3B1k1/3R3p/7b/8/8/8/8/7K w - - 0 1)

Heyl, Peter

Freie Presse, 1968

Q3B1k1/3R3p/7b/8/8/8/8/7K

#2

4 + 3

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Kf8
      • 2.Bh5#
      • 2.Bg6#
    • 1...Bc1
      • 2.Bh5#
      • 2.Bg6#
    • 1...Bd2
      • 2.Bh5#
      • 2.Bg6#
    • 1...Be3
      • 2.Bh5#
      • 2.Bg6#
    • 1...Bg7
      • 2.Bf7#
  • Tries
    • 1.Qd5+?
      • 1...Kf8
        • 2.Qf7#
      • 1...Kh8!
    • 1.Qa2+?
      • 1...Kf8
        • 2.Qf7#
      • 1...Kh8!
  • Keys
    • 1.Qa1!
      • 1...Kf8
        • 2.Qh8#
      • 1...Bg7
        • 2.Qxg7#
      • 1...Bf8
        • 2.Bf7#
      • 1...Bc1
        • 2.Qg7#
      • 1...Bd2
        • 2.Qg7#
      • 1...Be3
        • 2.Qg7#
      • 1...Bf4
        • 2.Qg7#
      • 1...Bg5
        • 2.Qg7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • B(a);SBLOCK::QAR(C)+B(D),DCHECK
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR1(C)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR1(C)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • Q(C);
    • Vars
      • K(c);P-FLIGHT::QAR2(C)
      • B(a);N_GUARD::QAR1(C),XB(a)
      • B(a);SBLOCK::B(D)
      • B(a);N_GUARD::QAR1(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).