MESON Chess Problem Database

Problem Display
PID: 251674 (k7/1R2K3/2Ppppp1/2PpQ3/r4nR1/8/5b2/8 w - - 0 1)

Burda, Josef

Sachova skladba, 2021

k7/1R2K3/2Ppppp1/2PpQ3/r4nR1/8/5b2/8

#2

6 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qxa1#
    • 1...Se2
      • 2.Rxa4#
    • 1...Sg2
      • 2.Rxa4#
    • 1...Sd3
      • 2.Rxa4#
    • 1...Sh3
      • 2.Rxa4#
    • 1...Sh5
      • 2.Rxa4#
    • 1...dxc5
      • 2.Qb8#
    • 1...f5
      • 2.Qh8#
  • Tries
    • 1.Rh4?
      • threat
        • 2.Rh8#
      • 1...Sh5
        • 2.Rxa4#
      • 1...Bxh4!
    • 1.Qxf6?
      • threat
        • 2.Qh8#
        • 2.Qf8#
      • 1...Bd4
        • 2.Qf8#
      • 1...Bh4!
    • 1.Qxe6?
      • threat
        • 2.Qc8#
        • 2.Qg8#
      • 1...Sxe6
        • 2.Rxa4#
      • 1...Re4!
  • Keys
    • 1.Qh5!
      • threat
        • 2.Qh8#
      • 1...Sxh5
        • 2.Rxa4#
      • 1...gxh5
        • 2.Rg8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • R(b);OGATEB::QAB(C),XR(b)
    • S(c);OGATE::R(A),XR(b)
    • P(e);OGATE,XP(B)::QAR1(C)
    • P(g);OGATE::QAB1(C)
  • Tries
    • Try
      • R(A);
      • Threat
        • R(A)
      • Vars
        • S(c);OGATE::R(A),XR(b)
      • Refutation
        • B(a);XR(A)
    • Try
      • Q(C);XP(g)
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::QAR(C)
      • Refutation
        • B(a);P_PINQ(C)
    • Try
      • Q(C);XP(f)
      • Threat
        • DUALS(2)
      • Vars
        • S(c);OGATE,XQ(C)::R(A),XR(b)
      • Refutation
        • R(b);P_PINQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAB1(C)
    • Vars
      • S(c);OGATE,XQ(C)::R(A),XR(b)
      • P(h);OGATE,XQ(C)::R(A)
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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).