MESON Chess Problem Database

Problem Display
PID: 186162 (2Q5/7B/2K2pp1/N2pk3/4p1R1/2p1p3/2P1p3/4N3 w - - 0 1)

Brown, Carl G

Chess, 1959

2Q5/7B/2K2pp1/N2pk3/4p1R1/2p1p3/2P1p3/4N3

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Sf3#
    • 1...d4
      • 2.Sc4#
  • Tries
    • 1.Bxg6?
      • 1...Kd4
        • 2.Sf3#
      • 1...d4
        • 2.Sc4#
        • 2.Rxe4#
        • 2.Qf5#
        • 2.Qe8#
      • 1...f5!
    • 1.Qe6+?
      • 1...Kd4
        • 2.Sf3#
        • 2.Qxd5#
        • 2.Qxf6#
      • 1...Kxe6!
    • 1.Qd7?
      • threat
        • 2.Qxd5#
      • 1...Kd4
        • 2.Sf3#
        • 2.Qxd5#
      • 1...d4
        • 2.Sc4#
        • 2.Qd5#
      • 1...f5!
    • 1.Qe8+?
      • 1...Kd4
        • 2.Sf3#
      • 1...Kf5!
  • Keys
    • 1.Kd7!
      • 1...Kd4
        • 2.Sf3#
      • 1...Kf5
        • 2.Kd6#
      • 1...d4
        • 2.Qc5#
      • 1...f5
        • 2.Qh8#
      • 1...g5
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(f);P_SPINP(d),S_FLIGHT::S(A)
    • P(e);N_GUARD,SBLOCK::S(D)
  • Tries
    • Try
      • B(F);XP(h)
      • Vars
        • K(f);P_SPINP(d),S_FLIGHT::S(A)
      • Refutation
        • P(g);
    • Try
      • Q(G);CHECK
      • Refutation
        • K(f);P-FLIGHT,XQ(G)
    • Try
      • Q(G);
      • Threat
        • QAR1(G),XP(e)
      • Refutation
        • P(g);
    • Try
      • Q(G);CHECK
      • Vars
        • K(f);P_SPINP(d),S_FLIGHT::S(A)
      • Refutation
        • K(f);P-FLIGHT,P_SPINP(h)
  • Actual
    • K(E);S_FLIGHT
    • Vars
      • K(f);P_SPINP(d),S_FLIGHT::S(A)
      • K(f);P-FLIGHT,P_SPINP(h)::QAB(G)+K(E)
      • P(e);OGATEB::QAR2(G)
      • P(g);OGATEB,SBLOCK::QAB(G)
      • P(h);::S(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).