MESON Chess Problem Database

Problem Display
PID: 152367 (1br3Nn/p5pb/6k1/r6p/4P2P/1R6/2B1N3/B2R1Q1K w - - 0 1)

Dawson, Thomas Rayner

British Chess Magazine, 1940

1br3Nn/p5pb/6k1/r6p/4P2P/1R6/2B1N3/B2R1Q1K

#2

10 + 9

15256 TRD Scrapbook 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa1
      • 2.Qf5#
    • 1...Ra2
      • 2.Qf5#
    • 1...Ra3
      • 2.Qf5#
    • 1...Ra4
      • 2.Qf5#
    • 1...Rf5
      • 2.Qxf5#
    • 1...Ra6
      • 2.Qf5#
    • 1...Rc7
      • 2.Rd6#
    • 1...Re8
      • 2.e5#
    • 1...Be5
      • 2.Qf5#
    • 1...Bd6
      • 2.Rxd6#
    • 1...Bc7
      • 2.e5#
  • Tries
    • 1.Rg3+?
      • 1...Rg5
        • 2.Rxg5#
        • 2.Qf5#
      • 1...Bxg3!
    • 1.Rb6+?
      • 1...Rc6
        • 2.e5#
      • 1...Bd6
        • 2.Rdxd6#
        • 2.Rbxd6#
      • 1...axb6!
  • Keys
    • 1.e5+!
      • 1...Rxc2
        • 2.Rg3#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 11
  • Sets
    • R(a);N_GUARD,XB(A)::QAB1(C)
    • R(a);N_GUARD::QAB1(C)
    • R(a);N_GUARD::QAB1(C),XR(a)
    • R(h);S_CUTB(g)::R(B)
    • R(h);N_GUARD::B(E)+P(H)
    • B(g);S_CUTR(a)::QAB1(C)
    • B(g);N_GUARD::R(B),XB(g)
    • B(g);S_CUTR(h)::B(E)+P(H)
  • Tries
    • Try
      • R(G);CHECK
      • Refutation
        • B(g);XR(G)
    • Try
      • R(G);CHECK
      • Vars
        • R(h);P_SPINR(h)::B(E)+P(H)
      • Refutation
        • P(d);XR(G)
  • Actual
    • P(H);CHECK
    • Vars
      • R(h);XB(E)::R(G)
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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).