MESON Chess Problem Database

Problem Display
PID: 268800 (2n1R1B1/1b2qn2/N7/R4p2/2ppk3/3N2P1/Qb2PK2/8 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Schach, 2023

2n1R1B1/1b2qn2/N7/R4p2/2ppk3/3N2P1/Qb2PK2/8

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Bd5
      • 2.Sac5#
    • 1...Sg5
      • 2.Sac5#
    • 1...Sfd6
      • 2.Sac5#
    • 1...Sh6
      • 2.Sac5#
    • 1...Sd8
      • 2.Sac5#
    • 1...Sh8
      • 2.Sac5#
    • 1...c3
      • 2.Sac5#
    • 1...f4
      • 2.Bh7#
  • Tries
    • 1.Rxe7+?
      • 1...Se5
        • 2.Sdc5#
        • 2.Sac5#
        • 2.Raxe5#
        • 2.Rexe5#
      • 1...Sxe7!
  • Keys
    • 1.Qb1!
      • threat
        • 2.Qh1#
      • 1...Bc1
        • 2.Qxb7#
      • 1...Se5
        • 2.Sdc5#
      • 1...Sg5
        • 2.Sac5#
      • 1...f4
        • 2.Bh7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • B(f);SBLOCK::S(G)
    • S(h);::S(G)
    • P(b);::S(G)
    • P(e);OGATEB::B(I)
  • Tries
    • Try
      • R(H);CHECK,XQ(g)
      • Refutation
        • S(i);XR(H)
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • B(a);OGATE::QAB(A),XB(f)
      • S(h);N_SPINQ(g),SBLOCK::QAB(A)+S(D),DCHECK
      • S(h);::S(G)
      • P(e);OGATEB::B(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).