MESON Chess Problem Database

Problem Display
PID: 78155 (8/p4B2/1P1p4/b1k2P2/Q7/2p1K3/8/8 w - - 0 1)

Pradignat, Emile Leonard

La Presse, 1899

8/p4B2/1P1p4/b1k2P2/Q7/2p1K3/8/8

#2

5 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Bxb6
      • 2.Qc4#
    • 1...axb6
      • 2.Qc4#
  • Tries
    • 1.Be8?
      • threat
        • 2.Qb5#
        • 2.Qd4#
      • 1...Kd5
        • 2.Qb5#
        • 2.Qd4#
      • 1...Kxb6
        • 2.Qc6#
      • 1...Bb4
        • 2.Qb5#
        • 2.Qc6#
      • 1...a6
        • 2.Qd4#
      • 1...d5!
  • Keys
    • 1.Bd5!
      • threat
        • 2.Qxa5#
      • 1...Kxd5
        • 2.Qb5#
      • 1...Kxb6
        • 2.Qc6#
      • 1...Bxb6
        • 2.Qc4#
      • 1...axb6
        • 2.Qc4#
      • 1...Bb4
        • 2.Qc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(b);SBLOCK,XP(D)::QAR1(B)
    • P(e);SBLOCK,XP(D)::QAR1(B)
  • Tries
    • Try
      • B(E);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);S_FLIGHT,XP(D)::QAR1(B)
        • P(e);::QAB1(B)
      • Refutation
        • P(d);
  • Actual
    • B(E);
    • Threat
      • QAR2(B),XB(b)
    • Vars
      • K(c);P-FLIGHT,XB(E)::QAR2(B)
      • K(c);S_FLIGHT,XP(D)::QAR1(B)
      • B(b);SBLOCK,XP(D)::QAR1(B)
      • P(e);SBLOCK,XP(D)::QAR1(B)
      • B(b);SBLOCK::QAR1(B)
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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).