MESON Chess Problem Database

Problem Display
PID: 120004 (1B2KbB1/4p3/p1P1NP2/3k4/Pn2p1p1/qP1p3p/p1b4Q/8 w - - 0 1)

Nagy, Odon

Alkotmany, 1912

1B2KbB1/4p3/p1P1NP2/3k4/Pn2p1p1/qP1p3p/p1b4Q/8

#2

9 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...e3
      • 2.Qh1#
  • Tries
    • 1.Sd4+?
      • 1...Kc5
        • 2.Ba7#
      • 1...e6
        • 2.Qe5#
      • 1...Kxd4!
    • 1.Sd8+?
      • 1...Kc5
        • 2.Ba7#
      • 1...e6
        • 2.Qe5#
      • 1...Kd4!
    • 1.Qf2?
      • threat
        • 2.Qc5#
      • 1...Kxc6
        • 2.Sd8#
      • 1...Sxc6
        • 2.Sf4#
      • 1...exf6
        • 2.Sd8#
      • 1...e3!
  • Keys
    • 1.Qg1!
      • threat
        • 2.Qc5#
      • 1...Kxc6
        • 2.Sd8#
      • 1...Sxc6
        • 2.Sf4#
      • 1...exf6
        • 2.Sd8#
      • 1...e3
        • 2.Qh1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(g);OGATEB::QAB(A)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(i);P-FLIGHT::B(G)
        • P(k);P_SPINP(k)::QAR1(A)
      • Refutation
        • K(i);P-FLIGHT,XS(E)
    • Try
      • S(E);CHECK
      • Vars
        • K(i);P-FLIGHT::B(G)
        • P(k);P_SPINP(k)::QAR1(A)
      • Refutation
        • K(i);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(i);S_FLIGHT,XP(D)::S(E)
        • S(f);SBLOCK,XP(D)::B(I)+S(E),DCHECK
        • P(k);N_GUARD,XP(F)::B(I)+S(E)
      • Refutation
        • P(g);
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • K(i);S_FLIGHT,XP(D)::S(E)
      • S(f);SBLOCK,XP(D)::B(I)+S(E),DCHECK
      • P(k);N_GUARD,XP(F)::B(I)+S(E)
      • P(g);OGATEB::QAB(A)
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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).