MESON Chess Problem Database

Problem Display
PID: 159401 (B3nn2/Q7/R6N/4kP2/5p2/b6K/8/8 w - - 0 1)

Steinhoff, Dieter

Schach, 1993

B3nn2/Q7/R6N/4kP2/5p2/b6K/8/8

#2

6 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Bc1
      • 2.Qc5#
    • 1...Bb2
      • 2.Qc5#
    • 1...Bc5
      • 2.Qxc5#
    • 1...Sd6
      • 2.Qg7#
    • 1...Sg7
      • 2.Qxg7#
    • 1...Se6
      • 2.Rxe6#
    • 1...Sg6
      • 2.Re6#
    • 1...Sd7
      • 2.Re6#
    • 1...Sh7
      • 2.Re6#
    • 1...f3
      • 2.Qe3#
  • Tries
    • 1.Qg7+?
      • 1...Sf6
        • 2.Qxf6#
      • 1...Sxg7!
  • Keys
    • 1.Rd6!
      • threat
        • 2.Qd4#
      • 1...Kxd6
        • 2.Sf7#
      • 1...Bxd6
        • 2.Qa1#
      • 1...Sxd6
        • 2.Qg7#
      • 1...Se6
        • 2.Rxe6#
      • 1...Bb2
        • 2.Qc5#
      • 1...Bc5
        • 2.Qxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • B(a);N_GUARD::QAR2(E)
    • B(a);N_GUARD::QAR2(E),XB(a)
    • S(d);N_GUARD::QAB(E)
    • S(d);N_GUARD::QAB(E),XS(d)
    • S(e);N_GUARD::R1(C),XS(e)
    • S(e);N_GUARD::R1(C)
    • P(b);N_GUARD::QAR2(E)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • S(d);N_GUARD,P_SPINS(d)::QAB1(E),XS(d)
      • Refutation
        • S(d);XQ(E)
  • Actual
    • R(C);
    • Threat
      • QAB1(E)
    • Vars
      • K(c);S_FLIGHT,XR(C)::S(D)
      • B(a);OGATE,SBLOCK,XR(C)::QAB(E)
      • S(d);N_GUARD,SBLOCK,XR(C)::QAB(E)
      • S(e);N_GUARD::R1(C),XS(e)
      • B(a);N_GUARD::QAR2(E)
      • B(a);N_GUARD::QAR2(E),XB(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).