MESON Chess Problem Database

Problem Display
PID: 94976 (2B4K/8/1Np4Q/1pr1kP1n/2p3b1/1n1P1P2/2N1P3/b3R3 w - - 0 1)

Brabec, Juraj

Pravda, 1966

2B4K/8/1Np4Q/1pr1kP1n/2p3b1/1n1P1P2/2N1P3/b3R3

#2

10 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bxf3
      • 2.exf3#
    • 1...Sg3
      • 2.f4#
    • 1...Sf6
      • 2.Qh2#
    • 1...Sg7
      • 2.f4#
    • 1...cxd3
      • 2.exd3#
  • Tries
    • 1.e3?
      • threat
        • 2.Qe6#
      • 1...Sf6
        • 2.Qf4#
        • 2.Qh2#
      • 1...Sd4
        • 2.exd4#
      • 1...Sf4
        • 2.exf4#
      • 1...Sg7
        • 2.f4#
      • 1...Bxf5!
  • Keys
    • 1.e4!
      • threat
        • 2.Sd7#
      • 1...Bxf5
        • 2.exf5#
      • 1...Sf6
        • 2.Qh2#
      • 1...Rd5
        • 2.exd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • B(d);OGATE,XP(E)::R(A)+P(C),XB(d)
    • S(h);N_GUARD::P(E)
    • S(h);OGATE,SBLOCK::QAB(H)
    • P(c);OGATE,XP(D)::R(A)+P(C),XP(c)
  • Tries
    • Try
      • P(C);
      • Threat
        • QAR1(H)
      • Vars
        • S(b);OGATE::R(A)+P(C)DCHECK,XS(b)
        • S(h);OGATE::R(A)+P(C)DCHECK,XS(h)
        • S(h);N_GUARD::P(E)
      • Refutation
        • B(d);XP(F)
  • Actual
    • P(C);
    • Threat
      • S(G)
    • Vars
      • B(d);OGATE,XP(F)::R(A)+P(C),XB(d)
      • S(h);OGATE,SBLOCK::QAB(H)
      • R(f);OGATE::R(A)+P(C),XR(f)
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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).