MESON Chess Problem Database

Problem Display
PID: 168264 (q1b3Q1/1n2K3/4BB1p/2p2N1r/2p1kp1R/3NP2R/6n1/4b3 w - - 0 1)

Petite, Efren

Probleemblad, 1979

q1b3Q1/1n2K3/4BB1p/2p2N1r/2p1kp1R/3NP2R/6n1/4b3

#2

9 + 11

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bd2
      • 2.Sf2#
    • 1...Bf2
      • 2.Sxf2#
    • 1...Bc3
      • 2.Sf2#
    • 1...Bb4
      • 2.Sf2#
    • 1...Ba5
      • 2.Sf2#
    • 1...Sxe3
      • 2.Rxe3#
    • 1...Sa5
      • 2.Sxc5#
    • 1...Sd6
      • 2.Sxc5#
    • 1...Sd8
      • 2.Sxc5#
    • 1...cxd3
      • 2.Qxg2#
  • Tries
    • 1.Bd5+?
      • 1...Kxf5
        • 2.Rxh5#
        • 2.Qh7#
        • 2.Qg4#
        • 2.e4#
      • 1...Kxd3!
  • Keys
    • 1.Bxc4!
      • threat
        • 2.Qd5#
      • 1...Kxf5
        • 2.Qh7#
      • 1...Rxf5
        • 2.Qxg2#
      • 1...Sxe3
        • 2.Rxf4#
      • 1...Be6
        • 2.Qxe6#
      • 1...Sa5
        • 2.Sd6#
      • 1...Sd6
        • 2.Sxd6#
      • 1...Sd8
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • B(a);N_GUARD::S(A)
    • B(a);N_GUARD::S(A),XB(a)
    • S(b);OGATE,XP(B)::R1(C),XS(b)
    • S(i);N_GUARD::S(A),XP(f)
    • P(c);SBLOCK,XS(A)::QAB(I),XS(b)
  • Tries
    • Try
      • B(F);CHECK
      • Refutation
        • K(d);N_SPINP(e),S_FLIGHT,XS(A)
  • Actual
    • B(F);XP(c)
    • Threat
      • QAB1(I)
    • Vars
      • K(d);N_SPINP(e),OGATEB,S_FLIGHT,XS(E)::QAB(I)
      • R(g);SBLOCK,XS(E)::QAB(I),XS(b)
      • S(b);N_GUARD,XP(B)::R1(D),XP(e)
      • B(k);N_GUARD::QAR2(I),XB(k)
      • S(i);N_GUARD::S(E)
      • S(i);N_GUARD::S(E),XS(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).