MESON Chess Problem Database

Problem Display
PID: 11519 (1Qq1r1B1/1p6/3BPr2/8/P1k5/P3Rp2/5P2/3RK3 w - - 0 1)

Ramaratnam, KC

Chess, 1939

1Qq1r1B1/1p6/3BPr2/8/P1k5/P3Rp2/5P2/3RK3

#2

10 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe6
      • 2.Qc7#
    • 1...Qc7
      • 2.Qxc7#
    • 1...Rxe6
      • 2.Qxc8#
    • 1...b5
      • 2.Qxb5#
  • Tries
    • 1.Qxb7?
      • threat
        • 2.Qe4#
        • 2.Qd5#
        • 2.Qb3#
        • 2.Qb4#
        • 2.Qb5#
      • 1...Qxe6
        • 2.Qe4#
        • 2.Qa6#
        • 2.Qc6#
        • 2.Qb3#
        • 2.Qb4#
        • 2.Qb5#
        • 2.Qc7#
      • 1...Qd7
        • 2.Qe4#
        • 2.Qd5#
        • 2.Qb3#
        • 2.Qb4#
      • 1...Qc5
        • 2.Qb3#
      • 1...Qc6
        • 2.Qxc6#
        • 2.Qb3#
        • 2.Qb4#
      • 1...Qa8
        • 2.Qb3#
        • 2.Qb4#
        • 2.Qb5#
      • 1...Qb8
        • 2.Qe4#
        • 2.Qd5#
        • 2.Qc6#
      • 1...Rf4
        • 2.Qd5#
        • 2.Qb3#
        • 2.Qb4#
        • 2.Qb5#
      • 1...Rf5
        • 2.Qe4#
        • 2.Qb3#
        • 2.Qb4#
      • 1...Qxb7!
  • Keys
    • 1.Bb4!
      • threat
        • 2.Rc3#
      • 1...Qxe6
        • 2.Qc7#
      • 1...Rfxe6
        • 2.Qf4#
      • 1...Rexe6
        • 2.Qxc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • Q(e);N_GUARD,P_PINR(E),P_SPINQ(e),XP(H)::QAR(I)
    • Q(e);N_GUARD::QAR(I),XQ(e)
    • R(f);N_GUARD,P_PINR(E),P_SPINR(f),XP(H)::QAR(I),XQ(e)
    • P(d);OGATE::QAB1(I),XP(d)
  • Tries
    • Try
      • Q(I);XP(d)
      • Threat
        • DUALS(5)
      • Vars
        • Q(e);::QAB1(I)
      • Refutation
        • Q(e);XQ(I)
  • Actual
    • B(G);
    • Threat
      • R1(E)
    • Vars
      • Q(e);N_GUARD,P_PINR(E),P_SPINQ(e),XP(H)::QAR(I)
      • R(c);N_GUARD,P_PINR(E),P_SPINR(c),XP(H)::QAR(I)
      • R(f);N_GUARD,P_PINR(E),P_SPINR(f),XP(H)::QAR(I),XQ(e)
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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).