MESON Chess Problem Database

Problem Display
PID: 137336 (8/8/1p6/1K3p2/1P2pR2/2Pk4/2R3p1/1B4B1 w - - 0 1)

Langstaff, William A

The Field, 1924

(First published on Thu Oct 9 1924)

8/8/1p6/1K3p2/1P2pR2/2Pk4/2R3p1/1B4B1

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...e3
      • 2.Rd4#
  • Tries
    • 1.Kxb6?
      • 1...e3
        • 2.Rd4#
      • 1...Kc4!
    • 1.Rf3+?
      • 1...e3
        • 2.Rxe3#
      • 1...exf3!
    • 1.Rh4?
      • 1...e3
        • 2.Rd4#
      • 1...f4!
  • Keys
    • 1.Rff2!
      • threat
        • 2.Rfd2#
      • 1...Ke3
        • 2.Rce2#
      • 1...e3
        • 2.Rc1#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(c);OGATE::R1(F)
  • Tries
    • Try
      • K(G);P-FLIGHT,XP(e)
      • Vars
        • P(c);OGATE::R1(F)
      • Refutation
        • K(b);P_SPINP(c),S_FLIGHT
    • Try
      • R(F);CHECK
      • Vars
        • P(c);P_SPINP(c)::R1(F),XP(c)
      • Refutation
        • P(c);XR(F)
    • Try
      • R(F);
      • Vars
        • P(c);OGATE::R1(F)
      • Refutation
        • P(d);
  • Actual
    • R(F);
    • Threat
      • R1(F)
    • Vars
      • K(b);P-FLIGHT::R1(C)
      • P(c);SBLOCK::B(A)+R(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).