MESON Chess Problem Database

Problem Display
PID: 275794 (1b1q1nN1/4NQ2/5Rp1/1p2p3/4k2r/1R5p/5pnK/B3rB2 w - - 0 1)

Bantysh, Nikolai Ivanovich

Phenix, 2001

1b1q1nN1/4NQ2/5Rp1/1p2p3/4k2r/1R5p/5pnK/B3rB2

#2

8 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qa5
      • 2.Qd5#
    • 1...Qb6
      • 2.Qd5#
    • 1...Qc7
      • 2.Qd5#
    • 1...Qd5
      • 2.Qxd5#
    • 1...Qc8
      • 2.Qd5#
    • 1...Qe8
      • 2.Qd5#
    • 1...Bd6
      • 2.Qd5#
    • 1...Se6
      • 2.Qxg6#
    • 1...Sd7
      • 2.Qd5#
      • 2.Qxg6#
    • 1...Sh7
      • 2.Qxg6#
  • Tries
    • 1.Rf4+?
      • 1...Sxf4
        • 2.Sf6#
      • 1...exf4
        • 2.Sf6#
      • 1...Rxf4!
  • Keys
    • 1.Rd6!
      • threat
        • 2.Qf3#
      • 1...Re3
        • 2.Rb4#
      • 1...Rf4
        • 2.Qd5#
      • 1...Se3
        • 2.Bd3#
      • 1...Sf4
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 9
  • Sets
    • Q(k);N_GUARD::QAB1(G)
    • Q(k);N_GUARD::QAB1(G),XQ(k)
    • B(j);S_CUTQ(k)::QAB1(G)
    • S(l);N_GUARD::QAB(G),XP(i)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • S(c);SBLOCK,XR(E)::S(H)
        • P(h);SBLOCK,XR(E)::S(H)
      • Refutation
        • R(f);XR(E)
  • Actual
    • R(E);
    • Threat
      • QAB1(G)
    • Vars
      • R(a);SBLOCK::R(D)
      • R(f);SBLOCK::QAB1(G)
      • S(c);SBLOCK::B(B)
      • S(c);SBLOCK::S(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).