MESON Chess Problem Database

Problem Display
PID: 60706 (3R2BB/7n/3K1b2/Q1p5/3kq1R1/p7/p7/nb3N2 w - - 0 1)

McIntyre, Donald Glenoe

Natal Mercury, 1919

3R2BB/7n/3K1b2/Q1p5/3kq1R1/p7/p7/nb3N2

#2

7 + 9

5639 Some Problems For My Friends 1957

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Qd2#
    • 1...Bd3
      • 2.Qxc5#
    • 1...Be5+
      • 2.Ke7#
    • 1...Sc2
      • 2.Qd2#
    • 1...c4
      • 2.Kc7#
  • Tries
    • 1.Bxf6+?
      • 1...Kd3
        • 2.Qd2#
      • 1...Sxf6!
    • 1.Qb4+?
      • 1...Kd3
        • 2.Qd2#
      • 1...c4
        • 2.Qxc4#
      • 1...cxb4!
  • Keys
    • 1.Qe1!
      • threat
        • 2.Qe3#
      • 1...Qf4+
        • 2.Kc6#
      • 1...Be5+
        • 2.Ke7#
      • 1...Kd3
        • 2.Qd2#
      • 1...Bd3
        • 2.Qxa1#
      • 1...Sc2
        • 2.Qd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(e);N_SPINB(h),N_SPINQ(f),P-FLIGHT::QAR1(C)
    • B(b);SBLOCK::QAB1(C),XP(g)
    • B(h);CHECK::R(E)+K(D)
    • S(a);S_CUTB(b)::QAR2(C)
    • P(g);::R(E)+K(D)
  • Tries
    • Try
      • B(G);CHECK,XB(h)
      • Vars
        • K(e);N_SPINQ(f),P-FLIGHT::QAR1(C)
      • Refutation
        • S(i);XB(G)
    • Try
      • Q(C);CHECK
      • Vars
        • K(e);N_SPINB(h),N_SPINQ(f),P-FLIGHT::QAR1(C)
        • P(g);P_SPINP(g)::QAR1(C),XP(g)
      • Refutation
        • P(g);XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAB1(C)
    • Vars
      • Q(f);CHECK::R(E)+K(D)
      • B(h);CHECK::R(E)+K(D)
      • K(e);N_SPINB(h),N_SPINQ(f),P-FLIGHT::QAR1(C)
      • B(b);OGATE,SBLOCK::QAB(C),XS(a)
      • S(a);S_CUTB(b)::QAR2(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).