MESON Chess Problem Database

Problem Display
PID: 1964 (1N2R3/5n2/1K1k4/3ppp2/2p5/8/5R2/7Q w - - 0 1)

Brown, Theodore Morris

New York Albion, 1860

1N2R3/5n2/1K1k4/3ppp2/2p5/8/5R2/7Q

#2

5 + 6

1679 American Chess Nuts 1868
3360 Simple Two-move Themes 1924
3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Sh6
      • 2.Qxh6#
    • 1...d4
      • 2.Qc6#
  • Tries
    • 1.Rd2?
      • threat
        • 2.Rxd5#
        • 2.Qxd5#
      • 1...d4
        • 2.Qc6#
      • 1...e4!
    • 1.Qf3?
      • threat
        • 2.Qa3#
      • 1...d4
        • 2.Qc6#
      • 1...c3!
    • 1.Qh7?
      • threat
        • 2.Qg6#
      • 1...Sg5
        • 2.Qc7#
        • 2.Qd7#
        • 2.Qe7#
      • 1...Sd8
        • 2.Qc7#
        • 2.Qd7#
        • 2.Qe7#
      • 1...Sh8
        • 2.Qc7#
        • 2.Qd7#
        • 2.Qe7#
      • 1...d4!
  • Keys
    • 1.Qe4!
      • 1...dxe4
        • 2.Rd2#
      • 1...fxe4
        • 2.Rf6#
      • 1...Sg5
        • 2.Qxe5#
      • 1...Sh6
        • 2.Qxe5#
      • 1...Sd8
        • 2.Qxe5#
      • 1...Sh8
        • 2.Qxe5#
      • 1...c3
        • 2.Qb4#
      • 1...d4
        • 2.Qc6#
      • 1...f4
        • 2.Qg6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • S(f);N_GUARD::QAR(A),XS(f)
    • P(b);OGATE::QAR1(A)
  • Tries
    • Try
      • R(B);P_PINP(b)
      • Threat
        • DUALS(2)
      • Vars
        • P(b);OGATE::QAR1(A)
      • Refutation
        • P(c);
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • P(b);OGATE::QAR1(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Refutation
        • P(b);
  • Actual
    • Q(A);
    • Vars
      • P(b);OGATEB,XQ(A)::R(B)
      • P(d);OGATE,XQ(A)::R(B)
      • S(f);N_GUARD::QAB1(A),XP(c)
      • P(a);OGATE::QAB(A)
      • P(b);OGATE::QAR1(A)
      • P(d);OGATE::QAR(A)
HTML5 logo

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).