MESON Chess Problem Database

Problem Display
PID: 103527 (b7/p3q3/3P3B/pQ1p1R2/3kN2R/1P6/1K1p2Nn/1n1rr3 w - - 0 1)

Dankiewicz, Jan

Szachy, 1978

b7/p3q3/3P3B/pQ1p1R2/3kN2R/1P6/1K1p2Nn/1n1rr3

#2

9 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe4
      • 2.Bg7#
    • 1...Qg7
      • 2.Bxg7#
    • 1...Rf1
      • 2.Be3#
    • 1...Rg1
      • 2.Be3#
    • 1...Rh1
      • 2.Be3#
    • 1...Re3
      • 2.Bxe3#
    • 1...Rxe4
      • 2.Be3#
    • 1...dxe4
      • 2.Qc4#
  • Tries
    • 1.Bg7+?
      • 1...Qf6
        • 2.Bxf6#
      • 1...Qe5
        • 2.Bxe5#
      • 1...Qxg7!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Qd3#
      • 1...Ke3
        • 2.Qd3#
      • 1...Kxe4
        • 2.Qd3#
      • 1...Qxe4
        • 2.Se6#
      • 1...Rxe4
        • 2.Se2#
      • 1...dxe4
        • 2.Qc5#
      • 1...Re3
        • 2.Qa4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • Q(j);N_GUARD,P_SPINQ(j),XS(D)::B(I)
    • Q(j);N_GUARD::B(I),XQ(j)
    • R(c);N_GUARD::B(I)
    • R(c);N_GUARD::B(I),XR(c)
    • R(c);N_GUARD,P_SPINR(c),XS(D)::B(I)
    • P(h);N_GUARD,P_SPINP(h),XS(D)::QAR1(F)
  • Tries
    • Try
      • B(I);CHECK
      • Vars
        • Q(j);N_GUARD,P_SPINQ(j)::B(I),XQ(j)
      • Refutation
        • Q(j);XB(I)
  • Actual
    • S(B);
    • Threat
      • QAR1(F)
    • Vars
      • K(f);S_FLIGHT::QAR1(F)
      • K(f);P-FLIGHT,XS(D)::QAB1(F)
      • Q(j);N_GUARD,XS(D)::S(B)
      • R(c);N_GUARD,XS(D)::S(B)
      • P(h);SBLOCK,XS(D)::QAB1(F)
      • R(c);SBLOCK::QAR(F)
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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).