MESON Chess Problem Database

Problem Display
PID: 120811 (6b1/4p1pN/1Np1kqnR/2P5/4B1P1/2b3Q1/K2p4/5R2 w - - 0 1)

Belliboni, Caetano

O Estado de Sao Paulo, 1971

6b1/4p1pN/1Np1kqnR/2P5/4B1P1/2b3Q1/K2p4/5R2

#2

9 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4
      • 2.Sg5#
      • 2.Sf8#
    • 1...Qh4
      • 2.Sf8#
    • 1...Qe5
      • 2.Sf8#
    • 1...Qg5
      • 2.Sxg5#
      • 2.Sf8#
    • 1...Qf7
      • 2.Sg5#
    • 1...Qf8
      • 2.Sg5#
      • 2.Sxf8#
    • 1...Be5
      • 2.Qb3#
    • 1...Sh4
      • 2.Sg5#
    • 1...Se5
      • 2.Sg5#
    • 1...Sf8
      • 2.Sg5#
    • 1...Sh8
      • 2.Sg5#
  • Tries
    • 1.Qd6+?
      • 1...Kf7
        • 2.Bxg6#
      • 1...exd6!
  • Keys
    • 1.Qe3!
      • threat
        • 2.Bd5#
      • 1...Ke5+
        • 2.Bd5#
      • 1...Kf7
        • 2.Bxg6#
      • 1...Qe5
        • 2.Sf8#
      • 1...Be5
        • 2.Qb3#
      • 1...Se5
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • Q(e);N_GUARD,P_SPINS(f)::S(I)
    • B(b);OGATE,SBLOCK::QAB(C)
    • S(f);P_SPINQ(e)::S(I)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(d);P_SPINQ(e),S_FLIGHT::B(D),XS(f)
      • Refutation
        • P(g);XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAR(C)+B(D),DCHECK
    • Vars
      • K(d);CHECK,P-FLIGHT::QAR(C)+B(D)
      • K(d);P_SPINQ(e),S_FLIGHT::B(D),XS(f)
      • Q(e);N_GUARD,P_SPINS(f),SBLOCK::S(I)
      • B(b);OGATE,SBLOCK::QAB(C)
      • S(f);P_SPINQ(e),SBLOCK::S(I)
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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).