MESON Chess Problem Database

Problem Display
PID: 18397 (3nR1BQ/K3B1rr/3P2bR/2PNkpn1/3N1p2/2PP1p2/8/8 w - - 0 1)

Apro, Laszlo

1st Prize, Skakbladet, 1955

3nR1BQ/K3B1rr/3P2bR/2PNkpn1/3N1p2/2PP1p2/8/8

#2

12 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rxh6
      • 2.Qxg7#
    • 1...Sh3
      • 2.Sxf3#
    • 1...Se4
      • 2.Sxf3#
    • 1...Sc6+
      • 2.Sxc6#
    • 1...Sb7
      • 2.Sc6#
      • 2.Bf6#
  • Tries
    • 1.Se3?
      • threat
        • 2.Sc4#
      • 1...Sc6+
        • 2.Sxc6#
      • 1...Bf7
        • 2.Bf6#
      • 1...Sge6
        • 2.Sxf3#
      • 1...Sgf7
        • 2.Bxd8#
      • 1...Sde6
        • 2.Sc6#
      • 1...Sdf7
        • 2.Bxg5#
      • 1...fxe3!
  • Keys
    • 1.Sb6!
      • threat
        • 2.Sc4#
        • 2.Sd7#
      • 1...Sc6+
        • 2.Sxc6#
      • 1...Bxe8
        • 2.Sc4#
      • 1...Bf7
        • 2.Bf6#
      • 1...Sge6
        • 2.Sxf3#
      • 1...Sgf7
        • 2.Bxd8#
      • 1...Sde6
        • 2.Sc6#
      • 1...Sdf7
        • 2.Bxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 3
  • Sets
    • R(h);N_GUARD,XR(G)::QAB(L),XR(g)
    • S(e);N_GUARD::S(C),XP(a)
    • S(i);CHECK,N_GUARD::S(C),XS(i)
  • Tries
    • Try
      • S(E);
      • Threat
        • S(E)
      • Vars
        • S(i);CHECK,N_GUARD::S(C),XS(i)
        • B(f);N_PINB(I)::R(J)+B(I),DCHECK
        • S(e);N_GUARD::S(C),XP(a)
        • S(e);N_PINB(I)::R(J)+B(I),XS(i)
        • S(i);N_GUARD::S(C)
        • S(i);N_PINB(I)::R(J)+B(I),XS(e)
      • Refutation
        • P(b);XS(E)
  • Actual
    • S(E);
    • Threat
      • DUALS(2)
    • Vars
      • S(i);CHECK,N_GUARD::S(C),XS(i)
      • B(f);XR(J)::S(E)
      • B(f);N_PINB(I)::R(J)+B(I),DCHECK
      • S(e);N_GUARD::S(C),XP(a)
      • S(e);N_PINB(I)::R(J)+B(I),XS(i)
      • S(i);N_GUARD::S(C)
      • S(i);N_PINB(I)::R(J)+B(I),XS(e)
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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).