MESON Chess Problem Database

Problem Display
PID: 170907 (5r2/7R/8/2n1nb1B/RB5k/1p5N/1q2pKPp/8 w - - 0 1)

Haring, Jacobus

3rd Prize, Problemisten, 1963

5r2/7R/8/2n1nb1B/RB5k/1p5N/1q2pKPp/8

#2

7 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Be6+
      • 2.Bf3#
    • 1...Bd7+
      • 2.Bf3#
    • 1...Bc8+
      • 2.Bf3#
    • 1...Sa6
      • 2.Be7#
    • 1...Se6
      • 2.Be7#
    • 1...Sb7
      • 2.Be7#
    • 1...Scd7
      • 2.Be7#
    • 1...Sg6
      • 2.Bxe2#
      • 2.Bf3#
  • Keys
    • 1.Be1+!
      • 1...Qd4+
        • 2.Kxe2#
      • 1...Be4+
        • 2.Bf3#
      • 1...Bg4+
        • 2.Bf7#
      • 1...Sxa4
        • 2.Ke3#
      • 1...Se4+
        • 2.Ke3#
      • 1...Sc4
        • 2.Kf3#
      • 1...Sg4+
        • 2.Kf3#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 7
  • Sets
    • B(h);CHECK,N_GUARD::R(G)+B(F)
    • S(f);OGATE::R(D)+B(E),DCHECK
  • Actual
    • B(E);CHECK
    • Vars
      • Q(a);CHECK,P_SPINQ(a)::B(E)+K(A),XP(b)
      • B(h);CHECK,P_SPINB(h)::R(G)+B(F)
      • S(f);SBLOCK,XR(D)::B(E)+K(A)
      • S(f);CHECK,P_SPINS(f)::B(E)+K(A)
      • S(g);P_SPINS(g)::B(E)+K(A)
      • S(g);CHECK,P_SPINS(g)::B(E)+K(A)
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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).