MESON Chess Problem Database

Problem Display
PID: 78160 (8/8/1Qppp3/4p3/2kp4/1R3P2/8/2KN4 w - - 0 1)

Pradignat, Emile Leonard

La Presse, 1898

8/8/1Qppp3/4p3/2kp4/1R3P2/8/2KN4

#2

5 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...d3
      • 2.Se3#
    • 1...d5
      • 2.Sb2#
      • 2.Qb4#
  • Tries
    • 1.Rc3+?
      • 1...Kd5
        • 2.Qb3#
        • 2.Qxc6#
      • 1...dxc3!
    • 1.Rb4+?
      • 1...Kd3
        • 2.Qa6#
      • 1...Kd5!
  • Keys
    • 1.Rd3!
      • 1...Kxd3
        • 2.Qa6#
      • 1...Kd5
        • 2.Se3#
      • 1...e4
        • 2.Rxd4#
      • 1...c5
        • 2.Qb3#
      • 1...d5
        • 2.Sb2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • P(b);N_GUARD::S(B)
  • Tries
    • Try
      • R(C);CHECK
      • Refutation
        • P(b);XR(C)
    • Try
      • R(C);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB(E)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • R(C);
    • Vars
      • K(a);S_FLIGHT,XR(C)::QAB(E)
      • K(a);P_SPINP(b),S_FLIGHT::S(B)
      • P(c);N_GUARD::R1(C),XP(b)
      • P(d);SBLOCK::QAB1(E)
      • P(e);SBLOCK::S(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).