MESON Chess Problem Database

Problem Display
PID: 144400 (8/1p3Np1/1P4B1/1KP2r2/Rp1pk1N1/3R2P1/2P1p3/1b2B3 w - - 0 1)

de Jong, Leonard Nicholaas

Bahn Frei, 1892

8/1p3Np1/1P4B1/1KP2r2/Rp1pk1N1/3R2P1/2P1p3/1b2B3

#2

11 + 8

119 Tidskrift for Schack 1909

SOLUTION

  • SOUND
  • Sets
    • 1...b3
      • 2.Raxd4#
  • Tries
    • 1.Bxf5+?
      • 1...Kd5
        • 2.Se3#
      • 1...Kxf5!
  • Keys
    • 1.c4!
      • threat
        • 2.Sf2#
      • 1...Kxd3
        • 2.Bxf5#
      • 1...Bxd3
        • 2.Sg5#
      • 1...bxc4 ep
        • 2.Raxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(c);OGATE,P_SPINP(d)::R1(E),XP(d)
  • Tries
    • Try
      • B(J);CHECK,N_SPINP(H),XR(f)
      • Vars
        • K(e);P_SPINP(d),S_FLIGHT::S(F)
      • Refutation
        • K(e);S_FLIGHT,XB(J)
  • Actual
    • P(B);
    • Threat
      • S(F)
    • Vars
      • K(e);S_FLIGHT,XR(C)::B(J),XR(f)
      • B(a);N_PINP(H),P_PINP(B),SBLOCK,XR(C)::S(K)
      • P(c);EP,OGATE,P_SPINP(d),XP(B)::R1(E),XP(d)
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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).