MESON Chess Problem Database

Problem Display
PID: 138713 (8/8/8/8/3Qp1R1/2K5/3Nk3/5b2 w - - 0 1)

Lincoln, Robert A

StrateGems, 2010

8/8/8/8/3Qp1R1/2K5/3Nk3/5b2

#2

4 + 3

SOLUTION

  • SOUND
  • Tries
    • 1.Qf2+?
      • 1...Kd1
        • 2.Qxf1#
      • 1...Kxf2!
  • Keys
    • 1.Qg1!
      • 1...Kd1
        • 2.Qxf1#
      • 1...Ke1
        • 2.Qxf1#
      • 1...Bg2
        • 2.Rxg2#
      • 1...Bh3
        • 2.Rxe4#
      • 1...e3
        • 2.Qxf1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR2(C),XB(a)
      • Refutation
        • K(b);P-FLIGHT,XQ(C)
  • Actual
    • Q(C);
    • Vars
      • K(b);P_SPINB(a),S_FLIGHT::QAR2(C),XB(a)
      • K(b);P-FLIGHT,P_SPINB(a)::QAR1(C),XB(a)
      • B(a);N_GUARD::R(D),XB(a)
      • B(a);::R(D),XP(c)
      • P(c);SBLOCK::QAB1(C),XB(a)
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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).