MESON Chess Problem Database

Problem Display
PID: 109218 (3Q3K/1NRN2B1/R3P2p/3k4/pb1r2n1/q1p2P2/4r3/8 w - - 0 1)

Puig Ambros, Estanislao

El Ajedrez Espanol, 1959-1960

3Q3K/1NRN2B1/R3P2p/3k4/pb1r2n1/q1p2P2/4r3/8

#2

9 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.Sf6#
    • 1...Rxe6
      • 2.Sb6#
    • 1...Rc4
      • 2.Sdc5#
    • 1...Se5
      • 2.Sf6#
  • Tries
    • 1.Sa5?
      • threat
        • 2.Sc5#
        • 2.Qa8#
      • 1...Rxe6
        • 2.Sb6#
      • 1...Bxa5
        • 2.Qa8#
      • 1...Rc4
        • 2.Sc5#
      • 1...Bc5
        • 2.Sxc5#
        • 2.Qa8#
      • 1...Be7
        • 2.Qa8#
      • 1...Bf8
        • 2.Qa8#
      • 1...Se5
        • 2.Sf6#
      • 1...Sf6
        • 2.Qa8#
      • 1...Bd6!
  • Keys
    • 1.Qa8!
      • threat
        • 2.Sa5#
        • 2.Sd8#
      • 1...Rxe6
        • 2.Sd6#
      • 1...Bc5
        • 2.Sa5#
      • 1...Bd6
        • 2.Sd8#
      • 1...Rc4
        • 2.Sbc5#
      • 1...Ba5
        • 2.Sxa5#
        • 2.Sd8#
      • 1...Se5
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(a);SBLOCK::QAR(H)+S(F),DCHECK
    • R(a);SBLOCK,XP(C)::QAR(H)+S(F),DCHECK
    • R(f);SBLOCK::QAR(H)+S(F)
    • S(g);SBLOCK::QAR(H)+S(F),DCHECK
  • Tries
    • Try
      • S(D);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);SBLOCK,XP(C)::QAR(H)+S(F),DCHECK
        • B(e);XS(D)::QAB(H)
        • R(f);::QAR(H)+S(F)
        • B(e);::QAB(H)
        • S(g);SBLOCK::QAR(H)+S(F),DCHECK
        • S(g);::QAB(H)
      • Refutation
        • B(e);
  • Actual
    • Q(H);
    • Threat
      • DUALS(2)
    • Vars
      • R(a);SBLOCK,XP(C)::QAB(H)+S(D)
      • B(e);::QAB(H)+S(D)
      • R(f);SBLOCK::QAB(H)+S(D)
      • S(g);N_GUARD,SBLOCK::S(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).