MESON Chess Problem Database

Problem Display
PID: 195167 (b1R1N3/1P1K4/5P2/1npkp3/1Pr1p3/1P6/2n2B1Q/q4N2 w - - 0 1)

Beach, Lennox F

Densmore MT (Pittsburgh Gazette-Times), 1918

b1R1N3/1P1K4/5P2/1npkp3/1Pr1p3/1P6/2n2B1Q/q4N2

#2

10 + 9

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qb2
      • 2.bxa8Q#
      • 2.bxa8B#
    • 1...Qc3
      • 2.bxa8Q#
      • 2.bxa8B#
    • 1...Qd4
      • 2.bxa8Q#
      • 2.bxa8B#
    • 1...Qb1
      • 2.bxa8Q#
      • 2.bxa8B#
    • 1...Qc1
      • 2.bxa8Q#
      • 2.bxa8B#
    • 1...Qd1
      • 2.bxa8Q#
      • 2.bxa8B#
    • 1...Qe1
      • 2.bxa8Q#
      • 2.bxa8B#
    • 1...Qxf1
      • 2.bxa8Q#
      • 2.bxa8B#
    • 1...Rxb4
      • 2.Rxc5#
    • 1...Rd4
      • 2.Rxc5#
    • 1...Sca3
      • 2.bxa8Q#
      • 2.bxa8B#
    • 1...Scd4
      • 2.Se3#
    • 1...Sba3
      • 2.Sc7#
      • 2.bxa8Q#
      • 2.bxa8B#
    • 1...Sc3
      • 2.Sc7#
    • 1...Sbd4
      • 2.Sc7#
    • 1...Sd6
      • 2.Sc7#
    • 1...Sa7
      • 2.Sc7#
    • 1...Sc7
      • 2.Sxc7#
    • 1...cxb4
      • 2.bxc4#
  • Tries
    • 1.Qxe5+?
      • 1...Qxe5
        • 2.bxa8Q#
        • 2.bxa8B#
      • 1...Kxe5!
  • Keys
    • 1.Bd4!
      • threat
        • 2.Qxe5#
      • 1...Kxd4
        • 2.Qd2#
      • 1...Qxd4
        • 2.bxa8Q#
        • 2.bxa8B#
      • 1...Rxd4
        • 2.Rxc5#
      • 1...Scxd4
        • 2.Se3#
      • 1...Sbxd4
        • 2.Sc7#
      • 1...cxd4
        • 2.bxc4#
      • 1...exd4
        • 2.Qh5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • Q(a);N_GUARD::PXB(i)=Q
    • Q(a);N_GUARD,XS(A)::PXB(i)=Q
    • R(c);N_GUARD,XP(E)::R1(I),XP(f)
    • R(c);N_GUARD::R1(I),XP(f)
    • S(b);S_CUTQ(a)::PXB(i)=Q
    • S(b);N_GUARD,SBLOCK::S(A)
    • S(e);N_GUARD::S(J)
    • S(e);N_GUARD::S(J),XS(e)
    • P(f);XP(E)::P(D),XR(c)
  • Tries
    • Try
      • Q(C);CHECK,XP(h)
      • Vars
        • Q(a);SBLOCK,XQ(C)::PXB(i)=Q
      • Refutation
        • K(g);P-FLIGHT,XQ(C)
  • Actual
    • B(B);
    • Threat
      • QAR1(C),XP(h)
    • Vars
      • K(g);OGATEB,P-FLIGHT,XB(B)::QAR2(C)
      • Q(a);N_GUARD,SBLOCK,XB(B)::PXB(i)=Q
      • R(c);N_GUARD,SBLOCK,XB(B)::R1(I),XP(f)
      • S(b);N_GUARD,SBLOCK,XB(B)::S(A)
      • S(e);N_GUARD,SBLOCK,XB(B)::S(J)
      • P(f);SBLOCK,XB(B)::P(D),XR(c)
      • P(h);OGATEB,SBLOCK,XB(B)::QAR(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).