MESON Chess Problem Database

Problem Display
PID: 70833 (5RrB/4Q3/3b2n1/1N1pqb1N/KppPk3/8/2Pn1PP1/3R2r1 w - - 0 1)

Wirtanen, Erkki Aukusti

Themes-64, 1960

5RrB/4Q3/3b2n1/1N1pqb1N/KppPk3/8/2Pn1PP1/3R2r1

#2

11 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qe6
      • 2.Sxd6#
    • 1...Re1
      • 2.Rxe1#
    • 1...Bh3
      • 2.Sg3#
    • 1...Bg4
      • 2.Sg3#
    • 1...Bd7
      • 2.Sg3#
    • 1...Bc8
      • 2.Sg3#
    • 1...Sb1
      • 2.Sxd6#
    • 1...Sf1
      • 2.Sxd6#
    • 1...Sb3
      • 2.Sxd6#
    • 1...Sf3
      • 2.Sxd6#
    • 1...Sf4
      • 2.Sf6#
  • Keys
    • 1.Qg5!
      • threat
        • 2.Qe3#
      • 1...Qxd4
        • 2.Sxd6#
        • 2.Qxf5#
      • 1...Qg3
        • 2.Sf6#
        • 2.Qxf5#
      • 1...Qf4
        • 2.Sf6#
      • 1...Re1
        • 2.Rxe1#
      • 1...Sf1
        • 2.f3#
      • 1...Sf4
        • 2.Sg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 8
  • Sets
    • Q(g);::S(G),XB(i)
    • R(a);N_GUARD::R(A),XR(a)
    • B(h);::S(H)
    • B(h);P_PINS(G)::S(H)
    • S(b);::S(G),XB(i)
    • S(j);SBLOCK::S(H)
  • Actual
    • Q(I);N_PINQ(g)
    • Threat
      • QAR1(I)
    • Vars
      • Q(g);N_GUARD::S(H)
      • R(a);N_GUARD::R(A),XR(a)
      • S(b);N_GUARD::P(C)
      • S(j);S_CUTQ(g)::S(H)
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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).