MESON Chess Problem Database

Problem Display
PID: 178771 (K1N5/2b5/p2Np3/3kr3/2RPb3/2n1r3/5Q2/8 w - - 0 1)

Jonsson, Nils Gustav Helmer

4th Prize, Springaren, 1956

K1N5/2b5/p2Np3/3kr3/2RPb3/2n1r3/5Q2/8

#2

6 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Re1
      • 2.Rc5#
    • 1...Re2
      • 2.Rc5#
    • 1...Rd3
      • 2.Rc5#
    • 1...Rf3
      • 2.Rc5#
    • 1...Rg3
      • 2.Rc5#
    • 1...Rh3
      • 2.Rc5#
    • 1...Bxd6
      • 2.Sb6#
  • Tries
    • 1.Qb2?
      • threat
        • 2.Qb7#
      • 1...Bxd6
        • 2.Sb6#
      • 1...Sb5
        • 2.Rc5#
      • 1...Bb6!
  • Keys
    • 1.Qf4!
      • threat
        • 2.Qxe5#
      • 1...Bxd6
        • 2.Sb6#
      • 1...Rf5
        • 2.Se7#
      • 1...Rg5
        • 2.Se7#
      • 1...Rh5
        • 2.Se7#
      • 1...Bb1
        • 2.Rc5#
      • 1...Bh1
        • 2.Rc5#
      • 1...Bc2
        • 2.Rc5#
      • 1...Bg2
        • 2.Rc5#
      • 1...Bd3
        • 2.Rc5#
      • 1...Bf3
        • 2.Rc5#
      • 1...Bf5
        • 2.Rc5#
      • 1...Bg6
        • 2.Rc5#
      • 1...Bh7
        • 2.Rc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 12
    • REMOVED MATES = 6
  • Sets
    • R(b);::R1(B)
    • B(h);N_GUARD,SBLOCK,XS(D)::S(F)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • B(h);N_GUARD,SBLOCK,XS(D)::S(F)
        • S(a);::R1(B)
      • Refutation
        • B(h);
  • Actual
    • Q(A);
    • Threat
      • QAR1(A),XR(e)
    • Vars
      • B(h);N_GUARD,SBLOCK,XS(D)::S(F)
      • R(e);::S(F)
      • B(c);::R1(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).