MESON Chess Problem Database

Problem Display
PID: 139781 (4B3/pK6/3pN3/3P4/1kp5/r1p1Q3/2R5/3N4 w - - 0 1)

Pradignat, Emile Leonard

Source?, 1887

4B3/pK6/3pN3/3P4/1kp5/r1p1Q3/2R5/3N4

#2

7 + 6

6490 yacpdb 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Kb3
      • 2.Rb2#
      • 2.Qxc3#
    • 1...Ra1
      • 2.Qxc3#
    • 1...Ra2
      • 2.Qxc3#
    • 1...Ra4
      • 2.Qxc3#
    • 1...Ra5
      • 2.Qxc3#
    • 1...Ra6
      • 2.Qxc3#
    • 1...a5
      • 2.Qb6#
    • 1...a6
      • 2.Qb6#
  • Tries
    • 1.Qc5+?
      • 1...Kb3
        • 2.Sd4#
      • 1...dxc5!
  • Keys
    • 1.Ra2!
      • 1...Kb3
        • 2.Rb2#
      • 1...Ka5
        • 2.Qxc3#
      • 1...Rxa2
        • 2.Qxc3#
      • 1...Rb3
        • 2.Ra4#
      • 1...Ra4
        • 2.Qxc3#
      • 1...Ra5
        • 2.Qxc3#
      • 1...Ra6
        • 2.Qxc3#
      • 1...c2
        • 2.Qxa3#
      • 1...a5
        • 2.Qb6#
      • 1...a6
        • 2.Qb6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(a);N_GUARD::QAB1(C),XP(b)
    • R(a);N_GUARD,SBLOCK::QAB1(C),XP(b)
    • P(f);N_GUARD::QAR2(C)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);P-FLIGHT::S(E)
      • Refutation
        • P(e);XQ(C)
  • Actual
    • R(B);
    • Vars
      • K(c);P-FLIGHT,P_SPINP(b)::R1(B)
      • K(c);P_SPINR(a),S_FLIGHT::QAB(C),XP(b)
      • R(a);N_GUARD,XR(B)::QAB1(C),XP(b)
      • R(a);OGATE,SBLOCK::R1(B)
      • R(a);N_GUARD::QAB1(C),XP(b)
      • P(b);OGATE::QAB1(C),XR(a)
      • P(f);N_GUARD::QAR2(C)
HTML5 logo

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).