MESON Chess Problem Database

Problem Display
PID: 135259 (R2N1N1K/P1k3p1/1p2p2p/3p3q/3Q4/B1b3r1/8/2Rn4 w - - 0 1)

Witt, Andreas

Badische Neueste Nachrichten, 1999

R2N1N1K/P1k3p1/1p2p2p/3p3q/3Q4/B1b3r1/8/2Rn4

#2

8 + 10

14503 Problemschach-Jahrbuch (1999) 2000

SOLUTION

  • SOUND
  • Sets
    • 1...Qf3
      • 2.Qe5#
    • 1...Qg4
      • 2.Qe5#
    • 1...Qg6
      • 2.Qe5#
    • 1...Qf7
      • 2.Qe5#
    • 1...Qe8
      • 2.Qe5#
    • 1...Qh1
      • 2.Qe5#
    • 1...Qh2
      • 2.Qe5#
    • 1...Qh3
      • 2.Qe5#
    • 1...Qh4
      • 2.Qe5#
    • 1...Qe5
      • 2.Qxe5#
    • 1...b5
      • 2.Qc5#
    • 1...g5
      • 2.Qe5#
    • 1...g6
      • 2.Qg7#
  • Tries
    • 1.Qxg7+?
      • 1...Qf7
        • 2.Qe5#
      • 1...Rxg7!
    • 1.Qf4+?
      • 1...Qe5
        • 2.Qxe5#
        • 2.Qf7#
      • 1...e5!
  • Keys
    • 1.Rb8!
      • threat
        • 2.Qxb6#
      • 1...b5
        • 2.Qc5#
        • 2.Qb6#
      • 1...g5
        • 2.Qe5#
      • 1...g6
        • 2.Qg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 11
  • Sets
    • Q(e);N_GUARD::QAB(C)
    • Q(e);N_GUARD,P_PINS(G)::QAB(C)
    • Q(e);N_GUARD::QAB(C),XQ(e)
    • P(f);N_GUARD::QAR2(C)
    • P(j);P_PINQ(C),S_CUTQ(e)::QAB(C)
    • P(j);P_PINQ(C),S_CUTQ(e),S_CUTR(c)::QAR(C)
  • Tries
    • Try
      • Q(C);CHECK,P_SPINQ(C),XP(j)
      • Vars
        • Q(e);N_GUARD,P_SPINQ(e)::QAB(C)
      • Refutation
        • R(c);XQ(C)
    • Try
      • Q(C);CHECK
      • Refutation
        • P(g);P_SPINP(g)
  • Actual
    • R(E);
    • Threat
      • QAB1(C),XP(f)
    • Vars
      • P(j);P_PINQ(C),S_CUTQ(e)::QAB(C)
      • P(j);P_PINQ(C),S_CUTQ(e),S_CUTR(c)::QAR(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).