MESON Chess Problem Database

Problem Display
PID: 17324 (4B1bK/8/3p4/r2k4/1p6/1R6/1N2Q3/3r2B1 w - - 0 1)

Lundberg, T

Comm., Chess Correspondent, 1946

4B1bK/8/3p4/r2k4/1p6/1R6/1N2Q3/3r2B1

#2

6 + 6

14773 The Best American Chess Problems of 1946 1948
459 Nebraska Chess Bulletin 1951
5454 Near Snap 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Rda1
      • 2.Rd3#
    • 1...Rb1
      • 2.Rd3#
    • 1...Rc1
      • 2.Rd3#
    • 1...Re1
      • 2.Rd3#
    • 1...Rf1
      • 2.Rd3#
    • 1...Rd3
      • 2.Rxd3#
  • Keys
    • 1.Re3!
      • threat
        • 2.Qc4#
      • 1...Kd4
        • 2.Rd3#
      • 1...Kc5
        • 2.Re5#
      • 1...Rc1
        • 2.Rd3#
      • 1...Rd3
        • 2.Rxd3#
      • 1...Rd4
        • 2.Qh5#
      • 1...Rc5
        • 2.Qxd1#

Anticipated by 4609(1883)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • R(a);N_GUARD::R(D)
    • R(a);N_GUARD::R(D),XR(a)
  • Actual
    • R(D);
    • Threat
      • QAB1(C)
    • Vars
      • K(d);P-FLIGHT::B(A)+R(D),DCHECK
      • R(a);N_GUARD::R(D)
      • R(a);N_GUARD::R(D),XR(a)
      • R(a);SBLOCK::QAR(C)
      • R(c);SBLOCK::QAR(C),XR(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).