MESON Chess Problem Database

Problem Display
PID: 208162 (8/4R3/4qpb1/1Q3r1N/2r2p2/1P2kPP1/1K2Pp2/5B2 w - - 0 1)

Lacy, Richard

Dubuque Chess Journal, 1875

8/4R3/4qpb1/1Q3r1N/2r2p2/1P2kPP1/1K2Pp2/5B2

#2

9 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rc1
      • 2.Qd3#
    • 1...Ra4
      • 2.Qd3#
    • 1...Rb4
      • 2.Qd3#
    • 1...Re4
      • 2.Qd3#
    • 1...Rcc5
      • 2.Qd3#
    • 1...Rc6
      • 2.Qd3#
    • 1...Rc7
      • 2.Qd3#
    • 1...Rc8
      • 2.Qd3#
  • Keys
    • 1.Qxc4!
      • threat
        • 2.Qd3#
        • 2.Qc3#
      • 1...Qe5+
        • 2.Qc3#
      • 1...Kd2
        • 2.Qc1#
      • 1...Rxh5
        • 2.Qxf4#
      • 1...Ra5
        • 2.Qxf4#
      • 1...Rb5
        • 2.Qxf4#
      • 1...Rc5
        • 2.Qxf4#
      • 1...Rd5
        • 2.Qxf4#
      • 1...Re5
        • 2.Qxf4#
      • 1...Rg5
        • 2.Qxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 8
  • Sets
    • R(c);OGATE::QAR1(G)
    • R(c);OGATE,P_PINP(D)::QAR1(G)
    • R(c);N_SPINQ(f),OGATE::QAR1(G)
  • Actual
    • Q(G);XR(c)
    • Threat
      • DUALS(2)
    • Vars
      • Q(f);CHECK::QAR2(G)
      • K(b);N_SPINQ(f),S_FLIGHT::QAB1(G)
      • R(e);N_GUARD,XS(H)::QAB1(G),XP(d)
      • R(e);N_GUARD::QAB1(G),XP(d)
      • R(e);N_GUARD,P_PINP(D)::QAB1(G),XP(d)
      • R(e);N_GUARD,N_SPINQ(f)::QAB1(G),XP(d)
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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).