MESON Chess Problem Database

Problem Display
PID: 121333 (8/2Q1p3/3pp3/1PRp4/1p1k4/3B2P1/4K3/8 w - - 0 1)

Pradignat, Emile Leonard

La Strategie, 1901

8/2Q1p3/3pp3/1PRp4/1p1k4/3B2P1/4K3/8

#2

6 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Rc1?
      • 1...b3
        • 2.Qc3#
      • 1...e5
        • 2.Qb6#
        • 2.Qa7#
      • 1...Ke5!
    • 1.Rc2?
      • 1...b3
        • 2.Qc3#
      • 1...e5
        • 2.Qb6#
        • 2.Qa7#
      • 1...Ke5!
    • 1.Qa7?
      • 1...Ke5
        • 2.Qa1#
      • 1...dxc5
        • 2.Qa1#
      • 1...e5
        • 2.Rc1#
        • 2.Rc2#
        • 2.Rc4#
        • 2.Rc6#
        • 2.Rc7#
        • 2.Rc8#
      • 1...b3!
  • Keys
    • 1.Qa5!
      • 1...Kxc5
        • 2.Qa7#
      • 1...Ke5
        • 2.Qa1#
      • 1...dxc5
        • 2.Qa1#
      • 1...b3
        • 2.Qc3#
      • 1...e5
        • 2.Qxb4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(E);
      • Vars
        • P(a);N_GUARD::QAB1(F)
      • Refutation
        • K(b);P_SPINP(d),S_FLIGHT
    • Try
      • R(E);
      • Vars
        • P(a);N_GUARD::QAB1(F)
      • Refutation
        • K(b);P_SPINP(d),S_FLIGHT
    • Try
      • Q(F);
      • Vars
        • K(b);P_SPINP(c),S_FLIGHT::QAB(F)
        • P(d);P_SPINP(d),SBLOCK,XR(E)::QAB(F)
      • Refutation
        • P(a);
  • Actual
    • Q(F);
    • Vars
      • K(b);OGATEB,S_FLIGHT,XR(E)::QAB(F)
      • K(b);P_SPINP(c),S_FLIGHT::QAB(F)
      • P(d);SBLOCK,XR(E)::QAB(F)
      • P(a);OGATE::QAB1(F)
      • P(e);SBLOCK::QAR2(F),XP(a)
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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).