MESON Chess Problem Database

Problem Display
PID: 169929 (5R2/5p2/4p1Qp/4NNn1/3Pk3/4P2P/B1K1p3/4B3 w - - 0 1)

Nagler, Alois

Neue Zurcher Zeitung, 1945

5R2/5p2/4p1Qp/4NNn1/3Pk3/4P2P/B1K1p3/4B3

#2

10 + 6

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sf3
      • 2.Qg4#
    • 1...Sh7
      • 2.Qg4#
  • Tries
    • 1.Kd2?
      • threat
        • 2.Sg3#
        • 2.Sd6#
      • 1...exf5
        • 2.Qc6#
      • 1...Sf3+!
    • 1.Bd2?
      • threat
        • 2.Sg3#
        • 2.Sd6#
      • 1...exf5
        • 2.Qc6#
      • 1...e1S+!
    • 1.Bf2?
      • threat
        • 2.Sg3#
        • 2.Sd6#
      • 1...exf5
        • 2.Qc6#
      • 1...e1S+!
    • 1.Qh5?
      • threat
        • 2.Qg4#
      • 1...Kxf5
        • 2.Qg6#
      • 1...Sxh3
        • 2.Qf3#
      • 1...exf5!
    • 1.Qxg5?
      • threat
        • 2.Sg3#
        • 2.Sd6#
        • 2.Qf4#
        • 2.Qg4#
      • 1...exf5
        • 2.Qf4#
      • 1...h5
        • 2.Sg3#
        • 2.Sd6#
        • 2.Qf4#
      • 1...hxg5!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Sd2#
      • 1...Kf3
        • 2.Sh4#
      • 1...Kd5
        • 2.Se7#
      • 1...exf5
        • 2.Qc6#
      • 1...Sf3
        • 2.Scd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(c);OGATE::QAR2(I)
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • P(d);OGATE,P_SPINP(d),SBLOCK,XS(H)::QAB(I)
      • Refutation
        • S(c);CHECK
    • Try
      • B(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(d);OGATE,P_SPINP(d),SBLOCK,XS(H)::QAB(I)
      • Refutation
        • P(a);CHECK
    • Try
      • B(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(d);OGATE,P_SPINP(d),SBLOCK,XS(H)::QAB(I)
      • Refutation
        • P(a);CHECK
    • Try
      • Q(I);
      • Threat
        • QAR2(I)
      • Vars
        • K(b);OGATEB,P_SPINP(f),P_SPINS(c),S_FLIGHT,XS(H)::QAB1(I)
        • S(c);N_GUARD,XP(E)::QAB1(I)
      • Refutation
        • P(d);XS(H)
    • Try
      • Q(I);XS(c)
      • Threat
        • DUALS(4)
      • Vars
        • P(d);XS(H)::QAR1(I)
      • Refutation
        • P(e);XQ(I)
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • K(b);S_FLIGHT::S(H)
      • P(d);OGATE,P_SPINP(d),SBLOCK,XS(H)::QAB(I)
      • S(c);SBLOCK::S(G)
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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).