MESON Chess Problem Database

Problem Display
PID: 61135 (8/6R1/2b1rk1P/K1N1r3/1Q1B3N/2n5/8/8 w - - 0 1)

Rothstein, Louis

1st Prize, Good Companions (February Meredith Ty.), 1917

8/6R1/2b1rk1P/K1N1r3/1Q1B3N/2n5/8/8

#2

7 + 5

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Bd5
      • 2.Sd7#
    • 1...Sd5
      • 2.Se4#
  • Tries
    • 1.Qb3?
      • threat
        • 2.Qxe6#
      • 1...Rd6
        • 2.Qf7#
      • 1...Re7
        • 2.Rg6#
      • 1...Re8
        • 2.Qf7#
      • 1...Bd5
        • 2.Sd7#
      • 1...Sd5
        • 2.Se4#
      • 1...Bd7!
    • 1.Qb7?
      • threat
        • 2.Rg6#
        • 2.Qf7#
      • 1...Re7
        • 2.Qxe7#
      • 1...Be4
        • 2.Qf7#
      • 1...Bd7
        • 2.Qf3#
      • 1...Be8
        • 2.Qf3#
      • 1...Bxb7!
  • Keys
    • 1.Qc4!
      • threat
        • 2.Qxe6#
      • 1...Rd6
        • 2.Qf7#
      • 1...Re7
        • 2.Rg6#
      • 1...Re8
        • 2.Qf7#
      • 1...Bd5
        • 2.Sd7#
      • 1...Bd7
        • 2.Qf1#
      • 1...Sd5
        • 2.Se4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(c);N_PINS(E)::S(E)
    • S(a);N_PINS(E)::S(E)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XR(d)
      • Vars
        • R(d);OGATE::QAR1(A)
        • R(d);SBLOCK::R1(G)
        • B(c);N_PINS(E)::S(E)
        • S(a);N_PINS(E)::S(E)
      • Refutation
        • B(c);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(d);N_GUARD::QAB1(A),XR(d)
        • B(c);::QAR1(A)
        • B(c);OGATE::QAR(A)
      • Refutation
        • B(c);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A),XR(d)
    • Vars
      • R(d);OGATE::QAR1(A)
      • R(d);SBLOCK::R1(G)
      • B(c);N_PINS(E)::S(E)
      • B(c);N_GUARD::QAR(A)
      • S(a);N_PINS(E)::S(E)
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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).