MESON Chess Problem Database

Problem Display
PID: 19343 (4b2n/1pK1N1BB/qpp1p1N1/R3n3/1r2k1pP/5p2/1b1Q1P2/4r3 w - - 0 1)

Ulehla, Johann Viktor

3rd Prize, Sahovski Vestnik, 1949

4b2n/1pK1N1BB/qpp1p1N1/R3n3/1r2k1pP/5p2/1b1Q1P2/4r3

#2

9 + 14

3105 FIDE Album (1945-1955) 1964
14730 Problempalette II (Chlubna/Wenda) 1991

SOLUTION

  • SOUND
  • Sets
    • 1...Qd3
      • 2.Qf4#
    • 1...Ra1
      • 2.Qe3#
    • 1...Rb1
      • 2.Qe3#
    • 1...Rc1
      • 2.Qe3#
    • 1...Rd1
      • 2.Qe3#
    • 1...Rf1
      • 2.Qe3#
    • 1...Rg1
      • 2.Qe3#
    • 1...Rh1
      • 2.Qe3#
    • 1...Re3
      • 2.Qxe3#
    • 1...Rd4
      • 2.Rxe5#
    • 1...Bc1
      • 2.Rxe5#
    • 1...Ba3
      • 2.Rxe5#
    • 1...Sc4
      • 2.Qc2#
    • 1...Sef7
      • 2.Sxh8#
    • 1...Shf7
      • 2.Sxe5#
  • Tries
    • 1.Sf5?
      • threat
        • 2.Sg3#
        • 2.Sd6#
      • 1...Kxf5
        • 2.Se7#
      • 1...Qd3
        • 2.Qf4#
      • 1...Rg1
        • 2.Sd6#
      • 1...Rd4
        • 2.Sg3#
        • 2.Rxe5#
      • 1...Sc4
        • 2.Sg3#
        • 2.Qc2#
      • 1...Sef7
        • 2.Sg3#
      • 1...Shf7
        • 2.Sg3#
      • 1...g3
        • 2.Sxg3#
        • 2.Sd6#
      • 1...exf5!
  • Keys
    • 1.Sc8!
      • threat
        • 2.Sd6#
      • 1...Kf5
        • 2.Sge7#
        • 2.Sd6#
      • 1...Qd3
        • 2.Qf4#
      • 1...Rd4
        • 2.Rxe5#
      • 1...Sc4
        • 2.Qc2#
      • 1...Sef7
        • 2.Sxh8#
      • 1...Shf7
        • 2.Sxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 10
  • Sets
    • Q(h);SBLOCK::QAR1(A)
    • R(a);N_GUARD::QAR1(A)
    • R(a);N_GUARD::QAR1(A),XR(a)
    • R(d);S_CUTB(b)::R1(D),XS(g)
    • B(b);N_GUARD::R1(D),XS(g)
    • S(g);N_GUARD,S_CUTQ(h)::QAB(A)
    • S(g);N_GUARD,S_CUTB(m)::B(I)+S(E),XS(n)
    • S(n);N_GUARD,S_CUTB(m)::B(I)+S(E),XS(g)
  • Tries
    • Try
      • S(G);
      • Threat
        • DUALS(2)
      • Vars
        • K(e);P_SPINS(g),S_FLIGHT,XS(G)::B(I)+S(E),DCHECK
        • Q(h);SBLOCK::QAR1(A)
        • R(a);::S(G)
        • S(g);::S(G)
        • S(n);::S(G)
      • Refutation
        • P(k);XS(G)
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • Q(h);SBLOCK::QAR1(A)
      • R(d);S_CUTB(b)::R1(D),XS(g)
      • S(g);N_GUARD,S_CUTQ(h)::QAB(A)
      • S(g);N_GUARD,S_CUTB(m)::B(I)+S(E),XS(n)
      • S(n);N_GUARD,S_CUTB(m)::B(I)+S(E),XS(g)
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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).