MESON Chess Problem Database

Problem Display
PID: 151523 (Rb1k2K1/NR1p2p1/1Pb1p1Q1/1r4p1/2N4p/5B2/7q/8 w - - 0 1)

Dawson, Thomas Rayner

British Chess Magazine, 1935

Rb1k2K1/NR1p2p1/1Pb1p1Q1/1r4p1/2N4p/5B2/7q/8

#2

8 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Ke7
      • 2.Sxc6#
    • 1...d6
      • 2.Raxb8#
  • Tries
    • 1.Rbxb8+?
      • 1...Ke7
        • 2.Re8#
        • 2.Qf7#
        • 2.Qxg7#
      • 1...Qxb8!
    • 1.Raxb8+?
      • 1...Ke7
        • 2.Sxc6#
        • 2.Re8#
        • 2.Qf7#
        • 2.Qxg7#
      • 1...Qxb8!
    • 1.Qf6+?
      • 1...Ke8
        • 2.Qf8#
      • 1...gxf6!
  • Keys
    • 1.Bh5!
      • threat
        • 2.Qe8#
      • 1...Ke7
        • 2.Sxc6#
      • 1...d5
        • 2.Qxg5#
      • 1...d6
        • 2.Raxb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(j);N_SPINB(i),P_SPINP(g),S_FLIGHT::S(E),XB(e)
    • P(g);S_CUTQ(a)::R(G),XB(i)
  • Tries
    • Try
      • R(F);CHECK,XB(i)
      • Refutation
        • Q(a);P_SPINQ(a),XR(F)
    • Try
      • R(G);CHECK,XB(i)
      • Refutation
        • Q(a);XR(G)
    • Try
      • Q(D);CHECK
      • Vars
        • K(j);P-FLIGHT::QAR1(D)
      • Refutation
        • P(h);XQ(D)
  • Actual
    • B(A);
    • Threat
      • QAR1(D)
    • Vars
      • K(j);N_SPINB(i),P_SPINP(g),S_FLIGHT::S(E),XB(e)
      • P(g);S_CUTR(c)::QAB(D),XP(d)
      • P(g);S_CUTQ(a)::R(G),XB(i)
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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).