MESON Chess Problem Database

Problem Display
PID: 136015 (r1nQb3/8/1B1pPK2/2N2p2/R1B1pkp1/6p1/6P1/4Rn2 w - - 0 1)

Hirschenson, Aaron

Mat Plus, 2009

r1nQb3/8/1B1pPK2/2N2p2/R1B1pkp1/6p1/6P1/4Rn2

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Sxb6
      • 2.Qxd6#
    • 1...Sa7
      • 2.Qxd6#
    • 1...Se7
      • 2.Qxd6#
    • 1...e3
      • 2.Rxf1#
  • Tries
    • 1.Sb3?
      • threat
        • 2.Rxf1#
      • 1...Sxb6
        • 2.Qxd6#
      • 1...Sd2
        • 2.Be3#
      • 1...Sh2
        • 2.Be3#
      • 1...Se3
        • 2.Bxe3#
      • 1...e3!
    • 1.Sb7?
      • threat
        • 2.Rxf1#
      • 1...Sxb6
        • 2.Qxd6#
      • 1...Sd2
        • 2.Be3#
      • 1...Sh2
        • 2.Be3#
      • 1...Se3
        • 2.Bxe3#
      • 1...e3!
    • 1.Sd7?
      • threat
        • 2.Rxf1#
      • 1...e3
        • 2.Ba6#
      • 1...Sd2
        • 2.Be3#
      • 1...Sh2
        • 2.Be3#
      • 1...Se3
        • 2.Bxe3#
      • 1...Sxb6!
  • Keys
    • 1.Sa6!
      • threat
        • 2.Rxf1#
      • 1...Sxb6
        • 2.Qxd6#
      • 1...e3
        • 2.Bb5#
      • 1...Sd2
        • 2.Be3#
      • 1...Sh2
        • 2.Be3#
      • 1...Se3
        • 2.Bxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • S(i);N_GUARD,XB(F)::QAB(I),XP(g)
    • S(i);N_GUARD::QAB(I),XP(g)
    • P(c);SBLOCK::R(A),XS(a)
  • Tries
    • Try
      • S(E);
      • Threat
        • R(A),XS(a)
      • Vars
        • S(i);N_GUARD,XB(F)::QAB(I),XP(g)
        • S(a);N_GUARD::B(F)
        • S(a);N_GUARD::B(F),XS(a)
      • Refutation
        • P(c);
    • Try
      • S(E);
      • Threat
        • R(A),XS(a)
      • Vars
        • S(i);N_GUARD,XB(F)::QAB(I),XP(g)
        • S(a);N_GUARD::B(F)
        • S(a);N_GUARD::B(F),XS(a)
      • Refutation
        • P(c);
    • Try
      • S(E);
      • Threat
        • R(A),XS(a)
      • Vars
        • P(c);OGATEB::R(C)+B(D)
        • S(a);N_GUARD::B(F)
        • S(a);N_GUARD::B(F),XS(a)
      • Refutation
        • S(i);XB(F)
  • Actual
    • S(E);
    • Threat
      • R(A),XS(a)
    • Vars
      • S(i);N_GUARD,XB(F)::QAB(I),XP(g)
      • P(c);OGATEB::R(C)+B(D)
      • S(a);N_GUARD::B(F)
      • S(a);N_GUARD::B(F),XS(a)
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).