MESON Chess Problem Database

Problem Display
PID: 17770 (B3rnq1/1Q4p1/4k1Pp/pN1p4/2n4K/3N2R1/b2p1R2/6b1 w - - 0 1)

Fleck, Ferenc

1st Prize, Parallele 50, 1949

B3rnq1/1Q4p1/4k1Pp/pN1p4/2n4K/3N2R1/b2p1R2/6b1

#2

8 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qf7
      • 2.Qxf7#
    • 1...Qh7
      • 2.Qf7#
    • 1...Qh8
      • 2.Qf7#
    • 1...Re7
      • 2.Qxd5#
    • 1...Sb2
      • 2.Re3#
    • 1...Sa3
      • 2.Re3#
    • 1...Se3
      • 2.Rxe3#
    • 1...Se5
      • 2.Sc5#
    • 1...Sb6
      • 2.Re3#
    • 1...Sd6
      • 2.Sd4#
    • 1...Sxg6+
      • 2.Rxg6#
  • Tries
    • 1.Re3+?
      • 1...Se5
        • 2.Sc5#
        • 2.Rxe5#
      • 1...Sxe3!
    • 1.Qc6+?
      • 1...Sd6
        • 2.Re3#
        • 2.Qxd6#
      • 1...Ke7!
  • Keys
    • 1.Rf7!
      • threat
        • 2.Qxd5#
      • 1...Sxg6+
        • 2.Rxg6#
      • 1...Qxf7
        • 2.Qxf7#
      • 1...Rxa8
        • 2.Qe7#
      • 1...Rd8
        • 2.Qe7#
      • 1...Sb2
        • 2.Qc6#
      • 1...Sa3
        • 2.Qc6#
      • 1...Se3
        • 2.Qa6#
        • 2.Qc6#
        • 2.Qb6#
      • 1...Se5
        • 2.Sf4#
      • 1...Sb6
        • 2.Qc6#
      • 1...Sd6
        • 2.Sc7#
      • 1...d4
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 5
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • Q(l);N_GUARD::QAB1(G),XQ(l)
    • Q(l);N_GUARD::QAB1(G)
    • R(j);SBLOCK::QAB1(G),XP(f)
    • S(d);N_GUARD::R(C)
    • S(d);N_GUARD::R(C),XS(d)
    • S(d);SBLOCK::S(B)
    • S(d);SBLOCK::S(E)
    • S(k);CHECK,OGATE,XP(F)::R(C),XS(k)
  • Tries
    • Try
      • R(C);CHECK
      • Refutation
        • S(d);XR(C)
    • Try
      • Q(G);CHECK
      • Refutation
        • K(g);P-FLIGHT
  • Actual
    • R(A);
    • Threat
      • QAB1(G),XP(f)
    • Vars
      • S(k);CHECK,OGATE,XP(F)::R(C),XS(k)
      • Q(l);OGATE,XR(A)::QAB1(G),XQ(l)
      • R(j);N_GUARD,XB(H)::QAR1(G)
      • R(j);N_GUARD::QAR1(G)
      • S(d);N_GUARD::QAR2(G)
      • S(d);SBLOCK::S(B)
      • S(d);SBLOCK::S(E)
      • P(f);::QAB1(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).