MESON Chess Problem Database

Problem Display
PID: 39783 (7Q/8/8/8/7b/5R2/7P/5K1k w - - 0 1)

Lincoln, Robert A

More Fun with Chess Miniatures, 2000

7Q/8/8/8/7b/5R2/7P/5K1k

#2

4 + 2

145 StrateGems 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Kxh2
      • 2.Qxh4#
    • 1...Bg3
      • 2.hxg3#
  • Tries
    • 1.Qd4?
      • threat
        • 2.Qg1#
      • 1...Kxh2
        • 2.Qg1#
        • 2.Qxh4#
      • 1...Bf2!
    • 1.Qa8?
      • threat
        • 2.Rf2#
        • 2.Rh3#
      • 1...Bf2
        • 2.Rxf2#
        • 2.Rh3#
      • 1...Bg3
        • 2.Rf2#
      • 1...Kxh2!
  • Keys
    • 1.Rg3!
      • 1...Kxh2
        • 2.Qxh4#
      • 1...Bxg3
        • 2.hxg3#
      • 1...Bg5
        • 2.Rg1#
      • 1...Bf6
        • 2.Rg1#
      • 1...Be7
        • 2.Rg1#
      • 1...Bd8
        • 2.Rg1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(a);OGATEB,P-FLIGHT,P_SPINB(b),XP(B)::QAR2(D),XB(b)
    • B(b);OGATE::QAR(D)+P(B),XB(b)
  • Tries
    • Try
      • Q(D);
      • Threat
        • QAR1(D)
      • Refutation
        • B(b);
    • Try
      • Q(D);
      • Threat
        • DUALS(2)
      • Vars
        • B(b);::QAB(D)+R(C)
      • Refutation
        • K(a);P-FLIGHT,XP(B)
  • Actual
    • R(C);
    • Vars
      • K(a);OGATEB,P-FLIGHT,P_SPINB(b),XP(B)::QAR2(D),XB(b)
      • B(b);OGATE,XR(C)::QAR(D)+P(B),XB(b)
      • B(b);::R1(C)
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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).