MESON Chess Problem Database

Problem Display
PID: 144306 (7B/3r4/Q4n1r/NNk5/2P1b3/K2p4/8/8 w - - 0 1)

Thibaud, M

diagrammes, 1973

7B/3r4/Q4n1r/NNk5/2P1b3/K2p4/8/8

#2

6 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Qa7#
    • 1...Rd5
      • 2.Qc6#
      • 2.Qa7#
    • 1...Rd6
      • 2.Qxd6#
    • 1...Ra7
      • 2.Qd6#
      • 2.Qxa7#
    • 1...Rb7
      • 2.Qd6#
    • 1...Rc7
      • 2.Qd6#
    • 1...Re7
      • 2.Qd6#
    • 1...Rf7
      • 2.Qd6#
    • 1...Rg7
      • 2.Qd6#
    • 1...Rh7
      • 2.Qd6#
    • 1...Rd8
      • 2.Qa7#
    • 1...Bf5
      • 2.Qc6#
    • 1...Bc6
      • 2.Qxc6#
    • 1...Bg6
      • 2.Qc6#
    • 1...Bb7
      • 2.Qa7#
    • 1...Bh7
      • 2.Qc6#
    • 1...Sd5
      • 2.Bd4#
  • Keys
    • 1.Qe6!
      • threat
        • 2.Sb3#
      • 1...Rd6
        • 2.Qxd6#
      • 1...Bc6
        • 2.Qxc6#
      • 1...Rd5
        • 2.Qc6#
      • 1...Ra7
        • 2.Qd6#
      • 1...Bd5
        • 2.Qe3#
      • 1...Sd5
        • 2.Bd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 12
  • Sets
    • R(f);N_GUARD::QAB(E)
    • R(f);N_GUARD::QAB1(E),XR(f)
    • R(f);N_GUARD::QAB1(E)
    • B(b);N_GUARD::QAR1(E)
    • B(b);N_GUARD::QAR1(E),XB(b)
    • B(b);S_CUTR(f)::QAB(E)
    • S(d);OGATE::B(F)
  • Actual
    • Q(E);
    • Threat
      • S(C)
    • Vars
      • R(f);N_GUARD::QAB1(E),XR(f)
      • B(b);N_GUARD::QAR1(E),XB(b)
      • R(f);S_CUTB(b)::QAR1(E)
      • R(f);N_GUARD,P_PINS(C)::QAB1(E)
      • B(b);OGATE::QAB(E)
      • S(d);OGATE::B(F)
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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).