MESON Chess Problem Database

Problem Display
PID: 186610 (5b1n/pKNk1p1R/1pNp4/r2p4/4P1R1/1Q4p1/8/5B2 w - - 0 1)

Kendry, H

Chess, 1959

5b1n/pKNk1p1R/1pNp4/r2p4/4P1R1/1Q4p1/8/5B2

#2

8 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...dxe4
      • 2.Qe6#
    • 1...d4
      • 2.Qe6#
  • Tries
    • 1.Bh3?
      • threat
        • 2.Rxg3#
        • 2.Rf4#
        • 2.Rgh4#
        • 2.Rg5#
        • 2.Rg6#
        • 2.Rgg7#
        • 2.Rg8#
      • 1...dxe4
        • 2.Qe6#
      • 1...Bg7
        • 2.Rgxg7#
      • 1...Sg6
        • 2.Rxg3#
        • 2.Rf4#
        • 2.Rgh4#
        • 2.Rg5#
        • 2.Rxg6#
      • 1...g2
        • 2.Rxg2#
        • 2.Rg3#
        • 2.Rf4#
        • 2.Rgh4#
        • 2.Rg5#
        • 2.Rg6#
        • 2.Rgg7#
        • 2.Rg8#
      • 1...d4
        • 2.Qe6#
      • 1...Be7!
    • 1.Rxf7+?
      • 1...Be7
        • 2.Rxe7#
      • 1...Sxf7!
  • Keys
    • 1.Rg8!
      • threat
        • 2.Bh3#
      • 1...dxe4
        • 2.Qe6#
      • 1...Be7
        • 2.Sb8#
      • 1...Bg7
        • 2.Rd8#
      • 1...g2
        • 2.Qh3#
      • 1...d4
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(c);OGATE,XP(C)::QAB1(B)
    • P(c);OGATE::QAB1(B)
  • Tries
    • Try
      • B(A);
      • Threat
        • DUALS(7)
      • Vars
        • P(c);OGATE,XP(C)::QAB1(B)
        • B(i);N_SPINP(h)::B(A)+R(D),XB(i)
        • P(c);OGATE::QAB1(B)
      • Refutation
        • B(i);N_SPINP(h)
    • Try
      • R(H);CHECK,XP(h)
      • Vars
        • B(i);N_GUARD,P_SPINB(i)::R1(H),XB(i)
      • Refutation
        • S(j);XR(H)
  • Actual
    • R(D);
    • Threat
      • B(A)
    • Vars
      • P(c);OGATE,XP(C)::QAB1(B)
      • B(i);N_SPINP(h),SBLOCK::S(E)
      • B(i);N_SPINP(h),OGATE::R1(D)
      • P(a);OGATE::QAB(B)
      • P(c);OGATE::QAB1(B)
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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).