MESON Chess Problem Database

Problem Display
PID: 45709 (q7/5B2/3N4/R1p3nR/Np1k2n1/3b1P2/2p4Q/K1B5 w - - 0 1)

Hermanson, Halvar

Springaren, 1954

q7/5B2/3N4/R1p3nR/Np1k2n1/3b1P2/2p4Q/K1B5

#2

9 + 8

23 Die Schwalbe 2002

SOLUTION

  • SOUND
  • Sets
    • 1...Se3
      • 2.Bb2#
    • 1...Se5
      • 2.Qg1#
      • 2.Qf2#
    • 1...Se4
      • 2.Sf5#
    • 1...c4
      • 2.Sb5#
  • Tries
    • 1.Qf4+?
      • 1...Qe4
        • 2.Sf5#
        • 2.Bb2#
      • 1...Se4
        • 2.Sf5#
        • 2.Bb2#
      • 1...Be4!
  • Keys
    • 1.Qd2!
      • threat
        • 2.Bb2#
      • 1...Ke5
        • 2.Qf4#
      • 1...Se4
        • 2.Sb5#
      • 1...c4
        • 2.Sf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • S(e);SBLOCK::B(B)
    • S(g);S_CUTB(b)::S(H)
    • P(f);S_CUTB(b)::S(H)
  • Tries
    • Try
      • Q(C);CHECK
      • Refutation
        • B(b);P_SPINB(b)
  • Actual
    • Q(C);P_PINB(b)
    • Threat
      • B(B)
    • Vars
      • K(d);N_SPINB(b),P_SPINP(f),P_SPINS(g),S_FLIGHT::QAB1(C)
      • S(g);::S(H)
      • P(f);::S(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).