MESON Chess Problem Database

Problem Display
PID: 98214 (4RB2/8/7p/1K1k4/p2p3R/5q2/6Q1/2b2r2 w - - 0 1)

Lincoln, Robert A

US Problem Bulletin, 1989

4RB2/8/7p/1K1k4/p2p3R/5q2/6Q1/2b2r2

#2

5 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Qxe4#
      • 2.Qa2#
    • 1...Rd1
      • 2.Qxf3#
    • 1...Rg1
      • 2.Qxf3#
    • 1...Rh1
      • 2.Qxf3#
    • 1...Bb2
      • 2.Rh5#
    • 1...Ba3
      • 2.Rh5#
    • 1...Be3
      • 2.Qa2#
    • 1...Bf4
      • 2.Qg8#
    • 1...d3
      • 2.Qa2#
  • Tries
    • 1.Rxh6?
      • threat
        • 2.Rd6#
      • 1...Ba3
        • 2.Rh5#
      • 1...Bf4
        • 2.Qg8#
      • 1...Bxh6!
  • Keys
    • 1.Bc5!
      • threat
        • 2.Rxd4#
      • 1...Qe4
        • 2.Qxe4#
        • 2.Qa2#
      • 1...Rd1
        • 2.Qxf3#
      • 1...Bb2
        • 2.Rh5#
      • 1...Be3
        • 2.Qa2#
      • 1...Bf4
        • 2.Qg8#
      • 1...d3
        • 2.Rd4#
        • 2.Qa2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • R(b);N_GUARD::QAB(A),XQ(c)
    • B(a);N_GUARD::R(B)
    • B(a);::QAB(A)
    • P(e);::QAB(A)
  • Tries
    • Try
      • R(B);XP(g)
      • Threat
        • R1(B)
      • Vars
        • B(a);N_GUARD::R(B)
        • B(a);::QAB(A)
      • Refutation
        • B(a);XR(B)
  • Actual
    • B(E);
    • Threat
      • R1(B),XP(e)
    • Vars
      • R(b);N_GUARD::QAB(A),XQ(c)
      • B(a);N_GUARD::R(B)
      • B(a);::QAB(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).