MESON Chess Problem Database

Problem Display
PID: 78156 (7Q/4K3/1P6/2pk4/6N1/1N6/B7/5R2 w - - 0 1)

Pradignat, Emile Leonard

La Presse, 1899

7Q/4K3/1P6/2pk4/6N1/1N6/B7/5R2

#2

7 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Sxc5#
    • 1...c4
      • 2.Qh1#
      • 2.Qa8#
  • Tries
    • 1.Kd7?
      • 1...Ke4
        • 2.Sxc5#
      • 1...c4
        • 2.Qd4#
        • 2.Qe5#
        • 2.Qh1#
        • 2.Qa8#
      • 1...Kc4!
    • 1.Sd4+?
      • 1...c4
        • 2.Qe5#
      • 1...Ke4!
    • 1.Sa5+?
      • 1...c4
        • 2.Qe5#
      • 1...Ke4!
    • 1.Rb1?
      • 1...Kc4
        • 2.Sc1#
      • 1...Kc6
        • 2.Sa5#
      • 1...c4
        • 2.Qh1#
        • 2.Qa8#
      • 1...Ke4!
    • 1.Qc3?
      • 1...Ke4
        • 2.Sd2#
        • 2.Sxc5#
        • 2.Sf6#
        • 2.Qf3#
        • 2.Qc4#
      • 1...c4
        • 2.Qf3#
      • 1...Kc6!
    • 1.Qf6?
      • threat
        • 2.Qe6#
      • 1...Ke4
        • 2.Sxc5#
        • 2.Qf3#
        • 2.Qf5#
      • 1...Kc4!
    • 1.Qc8?
      • threat
        • 2.Qe6#
      • 1...Ke4
        • 2.Qf5#
      • 1...Kc4!
    • 1.Qg8+?
      • 1...Ke4
        • 2.Bb1#
        • 2.Qc4#
      • 1...Kc6!
  • Keys
    • 1.Qb2!
      • 1...Kc4
        • 2.Sc1#
      • 1...Ke4
        • 2.Sxc5#
      • 1...Kc6
        • 2.Sa5#
      • 1...c4
        • 2.Qg2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::S(C),XP(a)
  • Tries
    • Try
      • K(F);P-FLIGHT
      • Vars
        • K(b);S_FLIGHT::S(C),XP(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(C);CHECK
      • Vars
        • P(a);P_SPINP(a)::QAR1(G)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(C);CHECK
      • Vars
        • P(a);P_SPINP(a)::QAR1(G)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(A);
      • Vars
        • K(b);S_FLIGHT::B(B)+S(C)
        • K(b);S_FLIGHT::S(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(G);
      • Vars
        • P(a);SBLOCK::QAB(G)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
    • Try
      • Q(G);
      • Threat
        • QAB1(G)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(G);
      • Threat
        • QAB1(G)
      • Vars
        • K(b);S_FLIGHT::QAB1(G)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
    • Try
      • Q(G);CHECK
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(G);
    • Vars
      • K(b);S_FLIGHT::B(B)+S(C)
      • K(b);S_FLIGHT::S(C),XP(a)
      • K(b);S_FLIGHT::S(C)
      • P(a);SBLOCK::QAB(G)
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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).