MESON Chess Problem Database

Problem Display
PID: 46811 (K6n/6BB/6N1/1pb4R/1Rr1k1p1/5p2/2nPrq2/2N1Q3 w - - 0 1)

Wirtanen, Erkki Aukusti

2nd Prize, Schach, 1959

K6n/6BB/6N1/1pb4R/1Rr1k1p1/5p2/2nPrq2/2N1Q3

#2

9 + 10

3749 FIDE Album (1959-1961) 1966

SOLUTION

  • SOUND
  • Sets
    • 1...Re3
      • 2.d3#
    • 1...Rd4
      • 2.Re5#
    • 1...Be3
      • 2.d3#
    • 1...Se3
      • 2.d3#
    • 1...Sd4
      • 2.Re5#
  • Tries
    • 1.Rxc4+?
      • 1...Qd4
        • 2.Re5#
      • 1...Bd4
        • 2.Re5#
      • 1...Sd4
        • 2.Re5#
      • 1...bxc4!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Sxh8#
      • 1...Kxd3
        • 2.Sf4#
      • 1...Sxg6
        • 2.Bxg6#
      • 1...Se3
        • 2.Sxc5#
      • 1...Sd4
        • 2.Sxf2#
      • 1...Sf7
        • 2.Sgf4#
        • 2.Sh4#
        • 2.Se7#
        • 2.Sf8#
        • 2.Sh8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • R(b);::P(C)
    • R(e);::R1(E)
    • B(i);N_SPINR(b),P_SPINR(e),SBLOCK::P(C)
    • S(a);N_SPINR(b),P_SPINR(e),SBLOCK::P(C)
    • S(a);SBLOCK::R1(E)
  • Tries
    • Try
      • R(D);CHECK,XR(e)
      • Vars
        • Q(c);P_SPINQ(c)::R1(E)
        • B(i);P_SPINB(i)::R1(E)
        • S(a);P_SPINS(a)::R1(E)
      • Refutation
        • P(h);XR(D)
  • Actual
    • S(A);
    • Threat
      • B(H)+S(F),XS(j)
    • Vars
      • K(f);N_SPINR(b),S_FLIGHT,XS(A)::B(H)+S(F),DCHECK
      • S(j);OGATE,P_SPINS(j),XS(F)::B(H),XS(j)
      • S(a);N_SPINR(b),P_SPINR(e),S_CUTQ(c)::S(A),XB(i)
      • S(a);S_CUTB(i)::S(A),XQ(c)
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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).