MESON Chess Problem Database

Problem Display
PID: 129757 (6b1/4K3/3p4/p7/k3p3/NNPB1n2/3p4/Q1b5 w - - 0 1)

Mikan, Ilja

Ostravsky udernik, 1949

6b1/4K3/3p4/p7/k3p3/NNPB1n2/3p4/Q1b5

#2

6 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxb3
      • 2.Bc2#
    • 1...Bxb3
      • 2.Bb5#
    • 1...d5
      • 2.Sc5#
  • Tries
    • 1.Sb1+?
      • 1...Ba3
        • 2.Qxa3#
      • 1...Kxb3!
    • 1.Sc2+?
      • 1...Ba3
        • 2.Qxa3#
      • 1...Kxb3!
    • 1.Sb5+?
      • 1...Ba3
        • 2.Qxa3#
      • 1...Kxb3!
  • Keys
    • 1.Kxd6!
      • threat
        • 2.Sc5#
      • 1...Kxb3
        • 2.Bc2#
      • 1...Bxb3
        • 2.Bb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • K(d);OGATEB,S_FLIGHT,XS(C)::B(E)
    • B(h);SBLOCK,XS(C)::B(E)
    • P(g);N_GUARD::S(C)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR1(A),XB(a)
      • Refutation
        • K(d);S_FLIGHT,XS(C)
    • Try
      • S(B);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR1(A),XB(a)
      • Refutation
        • K(d);S_FLIGHT,XS(C)
    • Try
      • S(B);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR1(A),XB(a)
      • Refutation
        • K(d);S_FLIGHT,XS(C)
  • Actual
    • K(F);S_FLIGHT,XP(g)
    • Threat
      • S(C)
    • Vars
      • K(d);OGATEB,S_FLIGHT,XS(C)::B(E)
      • B(h);SBLOCK,XS(C)::B(E)
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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).