MESON Chess Problem Database

Problem Display
PID: 48023 (8/8/6p1/4Q2R/6kb/8/6B1/2K5 w - - 0 1)

Lincoln, Robert A

Correspondence Chess, 2001

8/8/6p1/4Q2R/6kb/8/6B1/2K5

#2

4 + 3

4883 Still More Fun with Chess Miniatures 2002

SOLUTION

  • SOUND
  • Sets
    • 1...Be1
      • 2.Qg5#
    • 1...Bf2
      • 2.Qg5#
    • 1...Bg3
      • 2.Qg5#
    • 1...Bg5+
      • 2.Qxg5#
  • Tries
    • 1.Qf4+?
      • 1...Kxh5
        • 2.Bf3#
      • 1...Kxf4!
    • 1.Qe2+?
      • 1...Kf4
        • 2.Qf3#
      • 1...Kg3!
  • Keys
    • 1.Qe3!
      • threat
        • 2.Qf3#
      • 1...Kxh5
        • 2.Bf3#
      • 1...gxh5
        • 2.Bh3#
      • 1...Bg5
        • 2.Qxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • B(b);N_GUARD::QAR1(C)
    • B(b);N_GUARD,SBLOCK::QAR1(C)
    • B(b);CHECK,N_GUARD::QAR1(C),XB(b)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);S_FLIGHT,XR(D)::B(B)
      • Refutation
        • K(a);P-FLIGHT,XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(C);
    • Threat
      • QAB1(C)
    • Vars
      • K(a);S_FLIGHT,XR(D)::B(B)
      • P(c);SBLOCK,XR(D)::B(B)
      • B(b);N_GUARD,P_PINQ(C)::QAR1(C),XB(b)
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).