MESON Chess Problem Database

Problem Display
PID: 237673 (3N4/1Pppp3/1pPkpp2/2p5/2PB4/2P4Q/5PK1/b7 w - - 0 1)

Labai, Zoltan

Variantim, 2019

3N4/1Pppp3/1pPkpp2/2p5/2PB4/2P4Q/5PK1/b7

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...e5
      • 2.Qxd7#
    • 1...dxc6
      • 2.Qxe6#
  • Tries
    • 1.Be5+?
      • 1...fxe5
        • 2.Qd3#
      • 1...Kxe5!
    • 1.Qf3?
      • threat
        • 2.Sf7#
      • 1...dxc6
        • 2.Qxc6#
      • 1...e5
        • 2.Qd5#
      • 1...cxd4!
  • Keys
    • 1.Qd3!
      • threat
        • 2.Bxf6#
      • 1...Bxc3
        • 2.Bxc3#
      • 1...cxd4
        • 2.Qxd4#
      • 1...e5
        • 2.Be3#
      • 1...f5
        • 2.Bf6#
        • 2.Bg7#
        • 2.Bh8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(e);OGATE::QAR1(D),XP(h)
    • P(h);N_GUARD,XP(G)::QAR1(D),XP(e)
  • Tries
    • Try
      • B(F);CHECK
      • Vars
        • P(f);SBLOCK,XB(F)::QAR(D)
      • Refutation
        • K(d);S_FLIGHT,XB(F)
    • Try
      • Q(D);
      • Threat
        • S(I)
      • Vars
        • P(h);OGATE,XP(G)::QAR1(D),XP(h)
        • P(e);N_GUARD::QAR1(D)
      • Refutation
        • P(b);XB(F)
  • Actual
    • Q(D);
    • Threat
      • QAR(D)+B(F),XP(f)
    • Vars
      • B(a);OGATE,XP(C)::QAR(D)+B(F),XB(a)
      • P(b);OGATE,P_SPINP(b),XB(F)::QAR2(D),XP(b)
      • P(e);SBLOCK::QAR(D)+B(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).