MESON Chess Problem Database

Problem Display
PID: 17331 (8/3BP1K1/2pNPN2/R1B1k3/R1n1ppn1/1Q6/5r1p/b3q2r w - - 0 1)

Hassberg, Eric Manfred

4th Sp. Prize, Chess Correspondent TT, 1946-1947

8/3BP1K1/2pNPN2/R1B1k3/R1n1ppn1/1Q6/5r1p/b3q2r

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Sb2
      • 2.Sxg4#
    • 1...Sd2
      • 2.Sxg4#
    • 1...Sa3
      • 2.Sxg4#
    • 1...Sce3
      • 2.Rxe4#
    • 1...Sxa5
      • 2.Sxg4#
    • 1...Sb6
      • 2.Sxg4#
    • 1...Sxd6
      • 2.Bd4#
  • Tries
    • 1.Bd4+?
      • 1...Kxd4
        • 2.Sf5#
        • 2.Rxc4#
      • 1...Kxd6!
  • Keys
    • 1.Qh3!
      • threat
        • 2.Qh5#
      • 1...Sxd6
        • 2.Bd4#
      • 1...Sxf6
        • 2.Qf5#
      • 1...f3
        • 2.Qg3#
      • 1...Sce3
        • 2.Rxe4#
      • 1...Sge3
        • 2.Sf7#
      • 1...Sh6
        • 2.Sxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • S(f);::S(G),XS(i)
    • S(f);OGATE::R1(B),XP(g)
    • S(f);XR(C)::S(G),XS(i)
    • S(f);SBLOCK,XS(E)::R(C)+B(D),DCHECK
  • Tries
    • Try
      • B(D);CHECK
      • Refutation
        • K(j);S_FLIGHT,XS(E)
  • Actual
    • Q(A);
    • Threat
      • QAR(A)
    • Vars
      • S(f);SBLOCK,XS(E)::R(C)+B(D),DCHECK
      • S(i);OGATE,XS(G)::QAR1(A)
      • P(h);OGATEB::QAB(A)
      • S(f);OGATE::R1(B),XP(g)
      • S(i);::S(E)
      • S(i);::S(E),XS(f)
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).