MESON Chess Problem Database

Problem Display
PID: 196524 (3N1R1b/2n1N2B/1R1P1P2/1p2k2r/4p2p/2pbP3/Q6K/8 w - - 0 1)

Ruonala, Lauri Armas

3rd Comm., Suomen Tehtavaniekat TT, 1955

3N1R1b/2n1N2B/1R1P1P2/1p2k2r/4p2p/2pbP3/Q6K/8

#2

10 + 9

117 Suomen Shakki 1985

SOLUTION

  • SOUND
  • Sets
    • 1...Rf5
      • 2.Sg6#
    • 1...Bxf6
      • 2.Sf7#
    • 1...Sd5
      • 2.Qxd5#
    • 1...Sa6
      • 2.Qd5#
      • 2.Qe6#
    • 1...Se6
      • 2.Qd5#
      • 2.Qxe6#
    • 1...Sa8
      • 2.Qd5#
      • 2.Qe6#
    • 1...Se8
      • 2.Qd5#
      • 2.Qe6#
    • 1...c2
      • 2.Qa1#
      • 2.Qb2#
  • Tries
    • 1.Qb3?
      • threat
        • 2.Qxc3#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Se6
        • 2.Qd5#
        • 2.Qxe6#
      • 1...c2
        • 2.Qb2#
        • 2.Qc3#
      • 1...b4!
    • 1.Qa3?
      • threat
        • 2.Qxc3#
      • 1...Sd5
        • 2.Sec6#
      • 1...Se6
        • 2.Sdc6#
      • 1...c2
        • 2.Qb2#
        • 2.Qa1#
        • 2.Qc3#
      • 1...b4!
    • 1.dxc7?
      • threat
        • 2.Sf7#
        • 2.Re6#
        • 2.Qd5#
        • 2.Qe6#
      • 1...Rxh7
        • 2.Re6#
        • 2.Qd5#
        • 2.Qe6#
      • 1...Bc4!
  • Keys
    • 1.Qf2!
      • threat
        • 2.Qf4#
      • 1...Rf5
        • 2.Qxf5#
      • 1...Sd5
        • 2.Sg6#
      • 1...Se6
        • 2.Sf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • R(g);SBLOCK::S(G)
    • B(i);SBLOCK,XP(F)::S(I)
    • S(h);N_GUARD::QAR1(A),XS(h)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB(A),XP(a)
      • Vars
        • S(h);N_GUARD::QAR1(A),XS(h)
      • Refutation
        • P(e);
    • Try
      • Q(A);
      • Threat
        • QAB(A),XP(a)
      • Vars
        • S(h);SBLOCK::S(G)
        • S(h);SBLOCK::S(I)
      • Refutation
        • P(e);
    • Try
      • P(E);XS(h)
      • Threat
        • DUALS(4)
      • Refutation
        • B(b);
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • R(g);N_GUARD::QAR1(A),XR(g)
      • S(h);SBLOCK::S(G)
      • S(h);SBLOCK::S(I)
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).