MESON Chess Problem Database

Problem Display
PID: 164100 (1K4n1/2N3R1/1p3k1P/2r3R1/1Qb2pPn/pq1p4/7b/2B4B w - - 0 1)

Aleksandrov, Vladimir Aleksandrovich

Best Problems, 2015

1K4n1/2N3R1/1p3k1P/2r3R1/1Qb2pPn/pq1p4/7b/2B4B

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5
      • 2.Qf8#
    • 1...Bd5
      • 2.Qd4#
    • 1...Be6
      • 2.Se8#
  • Tries
    • 1.Qc3+?
      • 1...Re5
        • 2.Qxe5#
      • 1...Qxc3!
  • Keys
    • 1.Bd5!
      • threat
        • 2.Se8#
      • 1...Rxd5
        • 2.Qf8#
      • 1...Rxc7
        • 2.Qd6#
      • 1...Bxd5
        • 2.Qd4#
      • 1...Sf5
        • 2.Rxf5#
      • 1...Sg6
        • 2.Rf5#
      • 1...Qa4
        • 2.Qc3#
      • 1...Bb5
        • 2.Qd4#
      • 1...f3
        • 2.Rf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • R(h);OGATE::QAR2(C)
    • B(e);OGATE::QAB(C)
    • B(e);SBLOCK::S(G)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • R(h);N_GUARD,P_SPINR(h)::QAB1(C),XR(h)
      • Refutation
        • Q(c);XQ(C)
  • Actual
    • B(B);
    • Threat
      • S(G)
    • Vars
      • R(h);OGATE,XB(B)::QAR2(C)
      • R(h);OGATE,XS(G)::QAR2(C)
      • B(e);OGATE,XB(B)::QAB(C)
      • S(g);N_GUARD::R1(E),XS(g)
      • S(g);N_GUARD::R1(E)
      • Q(c);N_GUARD::QAB(C)
      • B(e);OGATE::QAB(C)
      • P(f);P_PINS(G)::R1(H)
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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).