MESON Chess Problem Database

Problem Display
PID: 231293 (1NB5/6n1/3N4/3kBpR1/1K2R3/3bp3/2P5/8 w - - 0 1)

van Dijk, Johannes

De Maasbode, 1927

1NB5/6n1/3N4/3kBpR1/1K2R3/3bp3/2P5/8

#2

8 + 5

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Se6
      • 2.Bb7#
    • 1...f4
      • 2.Rd4#
  • Tries
    • 1.Rxf5?
      • threat
        • 2.Rd4#
      • 1...Bxe4
        • 2.c4#
      • 1...Se6
        • 2.Bh2#
        • 2.Bg3#
        • 2.Bf4#
        • 2.Bb7#
      • 1...Sxf5!
  • Keys
    • 1.Sf7!
      • threat
        • 2.Rd4#
      • 1...Kxe4
        • 2.Bb7#
      • 1...Bxe4
        • 2.c4#
      • 1...fxe4
        • 2.Bxg7#
      • 1...Se6
        • 2.Bb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(e);SBLOCK::B(H)
    • P(d);::R1(C)
  • Tries
    • Try
      • R(E);XP(d)
      • Threat
        • R1(C)
      • Vars
        • B(a);N_GUARD,XR(C)::P(A)
      • Refutation
        • S(e);XR(E)
  • Actual
    • S(F);
    • Threat
      • R1(C)
    • Vars
      • K(c);S_FLIGHT,XR(C)::B(H)
      • B(a);N_GUARD,SBLOCK,XR(C)::P(A)
      • P(d);OGATEB,SBLOCK,XR(C)::R(E)+B(D),XS(e)
      • S(e);SBLOCK::B(H)
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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).