MESON Chess Problem Database

Problem Display
PID: 60136 (3BB1RK/6N1/r1n5/qn5P/1pR2pkN/2brpp1p/2bP2pP/Q7 w - - 0 1)

Leigh, Gordon

3rd Prize, Brisbane Courier, 1928

3BB1RK/6N1/r1n5/qn5P/1pR2pkN/2brpp1p/2bP2pP/Q7

#2

11 + 14

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Sgf5#
    • 1...Bxd2
      • 2.Sgf5#
      • 2.Se6#
    • 1...Bd4
      • 2.Bd7#
    • 1...Bxg7+
      • 2.Rxg7#
      • 2.Qxg7#
    • 1...Sbd4
      • 2.Sgf5#
    • 1...Scd4
      • 2.Se6#
    • 1...g1Q
      • 2.Qxg1#
    • 1...g1S
      • 2.Qxg1#
    • 1...g1B
      • 2.Qxg1#
    • 1...g1R
      • 2.Qxg1#
  • Keys
    • 1.Qe1!
      • threat
        • 2.Qg3#
      • 1...Bxg7+
        • 2.Rxg7#
      • 1...g1Q
        • 2.Qxg1#
      • 1...g1R
        • 2.Qxg1#
      • 1...Rd4
        • 2.Sgf5#
      • 1...Bd4
        • 2.Bd7#
      • 1...Sbd4
        • 2.Sgf5#
      • 1...Scd4
        • 2.Se6#
      • 1...f2
        • 2.Qe2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(d);N_PINS(G),N_SPINP(i)::R(J)+S(G)
    • B(c);N_SPINP(i),S_CUTR(d)::B(I)
    • S(l);N_PINS(G),N_SPINP(i)::R(J)+S(G)
    • S(n);N_PINS(G),N_SPINP(i)::R(J)+S(G)
    • P(b);OGATEB::QAR(A),XQ(b)
    • P(b);OGATEB::QAR(A),XS(b)
    • P(b);OGATEB::QAR(A),XB(b)
    • P(b);OGATEB::QAR(A),XR(b)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • B(c);CHECK,OGATE,P_SPINB(c),XS(G)::R(J),XB(c)
      • P(b);OGATEB::QAR(A),XQ(b)
      • P(b);OGATEB::QAR(A),XR(b)
      • R(d);N_PINS(G),N_SPINP(i)::R(J)+S(G)
      • B(c);N_SPINP(i),S_CUTR(d)::B(I)
      • S(l);N_PINS(G),N_SPINP(i)::R(J)+S(G)
      • S(n);N_PINS(G),N_SPINP(i)::R(J)+S(G)
      • P(f);OGATEB::QAB(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).