MESON Chess Problem Database

Problem Display
PID: 145896 (8/R7/q2NP3/n1p5/k1N5/1pKQ4/1P6/8 w - - 0 1)

Weiss, Berthold

3/4 Prize, Good Companions (December Meredith Ty.), 1917

8/R7/q2NP3/n1p5/k1N5/1pKQ4/1P6/8

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc4+
      • 2.Qxc4#
    • 1...Qb7
      • 2.Rxa5#
    • 1...Qc8
      • 2.Sb6#
      • 2.Rxa5#
    • 1...Qb6
      • 2.Sxb6#
    • 1...Qc6
      • 2.Rxa5#
    • 1...Qxd6
      • 2.Rxa5#
  • Tries
    • 1.Qf1?
      • threat
        • 2.Qa1#
      • 1...Qxc4+
        • 2.Qxc4#
      • 1...Qxd6
        • 2.Rxa5#
      • 1...Sxc4!
  • Keys
    • 1.Qe4!
      • threat
        • 2.Sb6#
      • 1...Qxc4+
        • 2.Qxc4#
      • 1...Qxd6
        • 2.Rxa5#
      • 1...Sxc4
        • 2.Rxa6#
      • 1...Qb6
        • 2.Sxb6#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sb7
        • 2.Qc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • Q(e);CHECK,OGATE,P_SPINS(c),XS(D)::QAR2(C),XQ(e)
    • Q(e);OGATE,P_SPINS(c)::R1(G),XS(c)
    • Q(e);N_GUARD,P_SPINS(c)::S(D),XQ(e)
    • Q(e);OGATE,P_SPINS(c),XS(E)::R1(G),XS(c)
  • Tries
    • Try
      • Q(C);
      • Threat
        • QAR(C)
      • Vars
        • Q(e);CHECK,OGATE,P_SPINS(c),XS(D)::QAR2(C),XQ(e)
        • Q(e);OGATE,P_SPINS(c),XS(E)::R1(G),XS(c)
      • Refutation
        • S(c);P_SPINQ(e),XS(D)
  • Actual
    • Q(C);
    • Threat
      • QAR(C)+S(D),DCHECK
    • Vars
      • Q(e);CHECK,OGATE,P_SPINQ(e),P_SPINS(c),XS(D)::QAR2(C),XQ(e)
      • Q(e);OGATE,P_SPINS(c),XS(E)::R1(G),XS(c)
      • S(c);OGATEB,P_SPINQ(e),P_SPINS(c),XS(D)::R(G),XQ(e)
      • Q(e);P_SPINS(c)::QAR(C)+S(D),DCHECK,XQ(e)
      • S(c);N_GUARD,P_SPINQ(e)::QAB(C),XS(c)
      • S(c);N_GUARD,P_SPINQ(e)::QAB(C)
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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).