MESON Chess Problem Database

Problem Display
PID: 64420 (4R3/p4K1p/5P2/NpPk3r/N6r/8/8/bB4BR w - - 0 1)

Waterhouse, T

Chess, 1947

4R3/p4K1p/5P2/NpPk3r/N6r/8/8/bB4BR

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rxh1
      • 2.Ba2#
      • 2.Be4#
    • 1...Rh2
      • 2.Be4#
    • 1...Rh3
      • 2.Be4#
    • 1...Rd4
      • 2.Rxh5#
    • 1...Re4
      • 2.Bxe4#
    • 1...Re5
      • 2.Rd8#
    • 1...Bc3
      • 2.Sxc3#
    • 1...Bd4
      • 2.Ba2#
    • 1...a6
      • 2.Sb6#
  • Tries
    • 1.Rxh4?
      • threat
        • 2.Ba2#
        • 2.Be4#
      • 1...Re5
        • 2.Ba2#
        • 2.Rd8#
      • 1...b4
        • 2.Be4#
      • 1...Rxh4!
  • Keys
    • 1.Bd4!
      • threat
        • 2.Rd8#
      • 1...Kxd4
        • 2.Rd1#
      • 1...Rxd4
        • 2.Rxh5#
      • 1...Bxd4
        • 2.Ba2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • R(b);N_GUARD::B(A)
    • R(b);OGATE::R(C),XR(e)
    • R(b);N_GUARD::B(A),XR(b)
    • R(e);SBLOCK::R(I)
    • B(a);N_GUARD::S(D),XB(a)
    • B(a);S_CUTR(b)::B(A)
    • P(f);N_GUARD::S(D)
  • Tries
    • Try
      • R(C);XR(b)
      • Threat
        • DUALS(2)
      • Vars
        • P(c);::B(A)
      • Refutation
        • R(e);XR(C)
  • Actual
    • B(B);
    • Threat
      • R(I)
    • Vars
      • K(d);OGATEB,P-FLIGHT,XB(B)::R(C)
      • R(b);OGATE,SBLOCK,XB(B)::R(C),XR(e)
      • B(a);SBLOCK,XB(B)::B(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).