MESON Chess Problem Database

Problem Display
PID: 93383 (1n1R4/p2npN2/PpR2p2/1K1kpBp1/1p4P1/8/2P1N3/8 w - - 0 1)

Beszczynski, Jan

Shakhmaty v SSSR, 1955

1n1R4/p2npN2/PpR2p2/1K1kpBp1/1p4P1/8/2P1N3/8

#2

9 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sxa6
      • 2.Rxd7#
    • 1...Sxc6
      • 2.Rxd7#
    • 1...b3
      • 2.c4#
    • 1...e4
      • 2.Be6#
    • 1...e6
      • 2.Rd6#
  • Tries
    • 1.Rxb6?
      • 1...Sxa6
        • 2.Rxd7#
      • 1...b3
        • 2.c4#
      • 1...Sc6
        • 2.Rxd7#
      • 1...e4
        • 2.Be6#
      • 1...e6
        • 2.Rd6#
      • 1...axb6!
    • 1.Re6?
      • 1...Sxa6
        • 2.Rxd7#
      • 1...b3
        • 2.c4#
      • 1...Sc6
        • 2.Rxd7#
      • 1...e4!
  • Keys
    • 1.Rc4!
      • 1...Sxa6
        • 2.Rxd7#
      • 1...b3
        • 2.Sc3#
      • 1...Sc6
        • 2.Rxd7#
      • 1...e4
        • 2.Rd4#
      • 1...e6
        • 2.Be4#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(j);N_GUARD,XP(F)::R(I),XS(h)
    • S(j);N_GUARD,XR(G)::R(I),XS(h)
    • P(a);N_GUARD::P(A)
    • P(c);SBLOCK::B(E)
    • P(i);N_GUARD::R1(G)
  • Tries
    • Try
      • R(G);XP(e)
      • Vars
        • S(j);N_GUARD,XP(F)::R(I),XS(h)
        • P(a);N_GUARD::P(A)
        • S(j);N_GUARD::R(I),XS(h)
        • P(c);SBLOCK::B(E)
        • P(i);N_GUARD::R1(G)
      • Refutation
        • P(g);XR(G)
    • Try
      • R(G);
      • Vars
        • S(j);N_GUARD,XP(F)::R(I),XS(h)
        • P(a);N_GUARD::P(A)
        • S(j);N_GUARD::R(I),XS(h)
      • Refutation
        • P(c);
  • Actual
    • R(G);
    • Vars
      • S(j);N_GUARD,XP(F)::R(I),XS(h)
      • P(a);N_GUARD::S(B)
      • S(j);N_GUARD::R(I),XS(h)
      • P(c);N_GUARD::R1(G)
      • P(i);SBLOCK::B(E)
HTML5 logo

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).