MESON Chess Problem Database

Problem Display
PID: 23295 (1K2N2R/3B2P1/p2pP3/1n1kq3/R2P1p2/2B2P2/1N5p/7Q w - - 0 1)

Petite, Efren

1st Prize, The Problemist, 1997/II

1K2N2R/3B2P1/p2pP3/1n1kq3/R2P1p2/2B2P2/1N5p/7Q

#2

12 + 7

102 Probleemblad 2002
102 Probleemblad 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Qf6
      • 2.Sxf6#
    • 1...Qe1
      • 2.Sf6#
    • 1...Qe2
      • 2.Sf6#
    • 1...Qe3
      • 2.Sf6#
    • 1...Qe4
      • 2.Sf6#
      • 2.fxe4#
    • 1...Qh5
      • 2.Sf6#
      • 2.Rxh5#
    • 1...Sa3
      • 2.Sc7#
    • 1...Sxc3
      • 2.Sc7#
    • 1...Sa7
      • 2.Sc7#
    • 1...Sc7
      • 2.Sxc7#
  • Tries
    • 1.Qf1?
      • threat
        • 2.Qc4#
      • 1...Qe2
        • 2.Sf6#
      • 1...Sa3
        • 2.Sc7#
      • 1...Qxd4!
  • Keys
    • 1.Qd1!
      • threat
        • 2.Qb3#
      • 1...Qxd4
        • 2.Rh5#
      • 1...Sxd4
        • 2.Ra5#
      • 1...Qe2
        • 2.Sf6#
      • 1...Sa3
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • Q(e);N_GUARD::S(K),XQ(e)
    • Q(e);N_GUARD::S(K)
    • S(c);N_GUARD::S(K)
    • S(c);N_GUARD,XB(C)::S(K)
    • S(c);N_GUARD::S(K),XS(c)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • Q(e);N_GUARD::S(K)
        • S(c);N_GUARD::S(K)
      • Refutation
        • Q(e);XP(F)
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • Q(e);OGATEB,P_SPINQ(e),XP(F)::R(L)
      • S(c);OGATEB,P_SPINS(c),XP(F)::R(E)
      • Q(e);N_GUARD::S(K)
      • S(c);N_GUARD::S(K)
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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).