MESON Chess Problem Database

Problem Display
PID: 119896 (1b6/5bp1/8/1n1BN1P1/2P2kPK/8/2N2n2/Q7 w - - 0 1)

Steif, Adolf

Deutsche Schachzeitung, 1887

1b6/5bp1/8/1n1BN1P1/2P2kPK/8/2N2n2/Q7

#2

8 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Be6
      • 2.Sg6#
    • 1...Bg6
      • 2.Sxg6#
    • 1...Bg8
      • 2.Sg6#
    • 1...Bxe5
      • 2.Qc1#
    • 1...Sd1
      • 2.Sd3#
    • 1...Sh1
      • 2.Sd3#
    • 1...Sd3
      • 2.Sxd3#
    • 1...Sh3
      • 2.Sd3#
  • Tries
    • 1.Qd4+?
      • 1...Se4
        • 2.Qxe4#
      • 1...Sxd4!
    • 1.Qe1?
      • threat
        • 2.Qe3#
      • 1...Sxg4
        • 2.Qe4#
      • 1...Se4
        • 2.Qxe4#
      • 1...Sd1
        • 2.Sd3#
        • 2.Qg3#
        • 2.Qe4#
      • 1...Ba7!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Qh2#
      • 1...Kxe5
        • 2.Qh2#
      • 1...Bxd5
        • 2.Sg6#
      • 1...Sxh1
        • 2.Sd3#
      • 1...Sxg4
        • 2.Qe4#
      • 1...Se4
        • 2.Sd3#
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • B(d);N_GUARD::S(G)
    • B(d);N_GUARD::S(G),XB(d)
    • B(f);SBLOCK,XS(G)::QAB(A)
    • S(a);N_GUARD::S(G)
    • S(a);N_GUARD::S(G),XS(a)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAR1(A),XS(a)
      • Refutation
        • S(c);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • S(a);N_GUARD,XP(D)::QAR1(A)
        • S(a);N_GUARD::QAR1(A),XS(a)
      • Refutation
        • B(f);
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • K(b);S_FLIGHT,XS(G)::QAB(A)
      • B(d);N_GUARD,XB(F)::S(G)
      • S(a);N_GUARD,XQ(A)::S(G)
      • S(a);N_GUARD,XP(D)::QAR1(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).