MESON Chess Problem Database

Problem Display
PID: 108920 (N1r1k3/RN4Rn/Q1pB2p1/2pPKPpP/8/8/8/8 w - - 0 1)

McArthur, William Johnstone

Chess Monthly, 1883

N1r1k3/RN4Rn/Q1pB2p1/2pPKPpP/8/8/8/8

#2

10 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rc7
      • 2.Sxc7#
    • 1...Rxa8
      • 2.Rxa8#
      • 2.Qxc6#
    • 1...Rb8
      • 2.Sc7#
      • 2.Qxc6#
    • 1...Rd8
      • 2.Sc7#
    • 1...Sf8
      • 2.Re7#
  • Keys
    • 1.Qe2!
      • 1...Rxa8
        • 2.Rxa8#
      • 1...cxd5
        • 2.Kxd5#
      • 1...gxf5
        • 2.Kxf5#
      • 1...gxh5
        • 2.Qxh5#
      • 1...Rc7
        • 2.Sxc7#
      • 1...Rb8
        • 2.Sc7#
      • 1...Rd8
        • 2.Sc7#
      • 1...Sf6
        • 2.Kxf6#
      • 1...Sf8
        • 2.Re7#
      • 1...c4
        • 2.Kd4#
      • 1...g4
        • 2.Kf4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • R(f);N_GUARD::S(J),XR(f)
    • R(f);N_GUARD::S(J)
    • S(e);SBLOCK::R1(I)
  • Actual
    • Q(E);
    • Vars
      • R(f);OGATE,XS(J)::R(G),XR(f)
      • P(c);XP(A)::QAR(E)+K(B),XP(c)
      • P(d);XP(C)::QAR(E)+K(B),XP(d)
      • P(d);OGATE,XP(D)::QAB(E),XP(d)
      • R(f);N_GUARD::S(J),XR(f)
      • R(f);N_GUARD::S(J)
      • S(e);::QAR(E)+K(B),XS(e)
      • S(e);SBLOCK::R1(I)
      • P(a);::QAR(E)+K(B)
      • P(b);::QAR(E)+K(B)
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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).