MESON Chess Problem Database

Problem Display
PID: 109430 (6b1/1Qpp4/B1p5/3n3R/2Nk1p2/5P2/1PPB4/7K w - - 0 1)

Stastny, Juraj

Technike Noviny, 1977

6b1/1Qpp4/B1p5/3n3R/2Nk1p2/5P2/1PPB4/7K

#2

9 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Qa7#
    • 1...Sc3
      • 2.Bxc3#
      • 2.bxc3#
    • 1...Se3
      • 2.Bc3#
    • 1...Sb4
      • 2.Bc3#
    • 1...Sb6
      • 2.Bc3#
    • 1...Sf6
      • 2.Bc3#
    • 1...Se7
      • 2.Bc3#
  • Tries
    • 1.Bc3+?
      • 1...Kc5
        • 2.Qb4#
        • 2.Qa7#
        • 2.b4#
      • 1...Sxc3!
    • 1.Qa7+?
      • 1...Sb6
        • 2.Bc3#
      • 1...c5!
  • Keys
    • 1.Sa5!
      • threat
        • 2.Sb3#
      • 1...Kc5
        • 2.Qb4#
      • 1...Sc3
        • 2.bxc3#
      • 1...Se3
        • 2.Bc3#
        • 2.c3#
      • 1...Sb4
        • 2.c3#
      • 1...Sb6
        • 2.c3#
      • 1...Sf6
        • 2.c3#
      • 1...Se7
        • 2.c3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 5
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(a);P_SPINS(c),S_FLIGHT::QAB(I)
    • S(c);N_GUARD::B(D)
  • Tries
    • Try
      • B(D);CHECK
      • Refutation
        • S(c);XB(D)
    • Try
      • Q(I);CHECK
      • Vars
        • S(c);P_SPINS(c)::B(D)
      • Refutation
        • P(d);P_SPINP(d)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • K(a);P_SPINS(c),S_FLIGHT::QAB1(I)
      • S(c);OGATE::P(B),XS(c)
      • S(c);N_GUARD::P(C)
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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).