MESON Chess Problem Database

Problem Display
PID: 225338 (8/4QN2/N3nn1p/2Pr1p2/2KPk3/8/4P2b/2BR4 w - - 0 1)

Bosak, Juraj

3rd Prize, Praca, 1953

8/4QN2/N3nn1p/2Pr1p2/2KPk3/8/4P2b/2BR4

#2

9 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd4+
      • 2.Rxd4#
    • 1...Rxc5+
      • 2.Sxc5#
    • 1...Re5
      • 2.Sd6#
    • 1...h5
      • 2.Sg5#
  • Tries
    • 1.Qxe6+?
      • 1...Re5
        • 2.Sd6#
      • 1...Be5!
  • Keys
    • 1.Qb7!
      • threat
        • 2.Qb1#
      • 1...Sxd4
        • 2.Rxd4#
      • 1...Sxc5
        • 2.Sxc5#
      • 1...Sf4
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • R(c);CHECK,OGATE,XP(E)::R1(B),XR(c)
    • R(c);CHECK,XP(F)::S(G),XR(c)
    • R(c);N_GUARD,N_SPINS(e),S_CUTB(a)::S(I)
    • P(g);N_GUARD::S(I)
  • Tries
    • Try
      • Q(H);CHECK,XS(e)
      • Vars
        • R(c);P_SPINR(c)::S(I)
      • Refutation
        • B(a);P_SPINB(a)
  • Actual
    • Q(H);N_PINS(e),P_PINR(c)
    • Threat
      • QAB(H)
    • Vars
      • S(e);OGATE,XP(E)::R1(B),XS(e)
      • S(e);XP(F)::S(G),XS(e)
      • S(e);S_CUTB(a)::S(I)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).