MESON Chess Problem Database

Problem Display
PID: 108724 (q1b5/4p3/2n2p2/6NK/5knN/2Q5/5P1b/4r3 w - - 0 1)

Kruk, Henryk

Benno Schloterbech, 1996

q1b5/4p3/2n2p2/6NK/5knN/2Q5/5P1b/4r3

#2

5 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Re4
      • 2.Sh3#
    • 1...Re5
      • 2.Qf3#
    • 1...Bg1
      • 2.Qg3#
    • 1...Bg3
      • 2.Qxg3#
      • 2.fxg3#
    • 1...Bf5
      • 2.Sg2#
    • 1...f5
      • 2.Sg2#
      • 2.Sg6#
    • 1...e5
      • 2.Qf3#
  • Tries
    • 1.Qd4+?
      • 1...Re4
        • 2.Sh3#
        • 2.Qxe4#
      • 1...Sxd4!
    • 1.Qc4+?
      • 1...Ke5
        • 2.Sf7#
      • 1...Re4
        • 2.Qxe4#
      • 1...Sd4!
  • Keys
    • 1.Qd3!
      • threat
        • 2.Sg6#
      • 1...Ke5
        • 2.Sg6#
      • 1...Re4
        • 2.Qxe4#
      • 1...Bf5
        • 2.Qxf5#
      • 1...Sge5
        • 2.Sg2#
      • 1...Sce5
        • 2.Sh3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • R(a);SBLOCK::S(D)
    • R(a);P_PINS(D),SBLOCK::QAR1(B)
    • B(b);N_GUARD::QAB1(B)
    • B(i);SBLOCK::S(C)
    • P(g);SBLOCK::QAR1(B)
  • Tries
    • Try
      • Q(B);CHECK
      • Refutation
        • S(e);XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);S_FLIGHT::S(D)
        • R(a);N_GUARD,P_SPINR(a)::QAR1(B),XR(a)
      • Refutation
        • S(e);P_SPINS(e)
  • Actual
    • Q(B);
    • Threat
      • S(C)
    • Vars
      • K(c);S_FLIGHT::S(C)
      • R(a);N_GUARD::QAR1(B),XR(a)
      • B(i);N_GUARD::QAR1(B),XB(i)
      • S(d);SBLOCK::S(C)
      • S(e);SBLOCK::S(D)
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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).