MESON Chess Problem Database

Problem Display
PID: 229269 (6r1/B6B/2p4R/3k4/K3N3/N6b/1Qn3pb/2r5 w - - 0 1)

Fleck, Ferenc

Nepszava, 1926

6r1/B6B/2p4R/3k4/K3N3/N6b/1Qn3pb/2r5

#2

7 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rg3
      • 2.Rd6#
    • 1...Bg1
      • 2.Rd6#
    • 1...Be5
      • 2.Qa2#
      • 2.Qb3#
    • 1...Bd6
      • 2.Rxd6#
    • 1...Sa1
      • 2.Qd4#
    • 1...Se1
      • 2.Qd4#
    • 1...Sxa3
      • 2.Qd4#
    • 1...Se3
      • 2.Qd4#
    • 1...Sb4
      • 2.Qd4#
    • 1...Sd4
      • 2.Qxd4#
  • Tries
    • 1.Qb5+?
      • 1...c5
        • 2.Qxc5#
      • 1...cxb5+!
  • Keys
    • 1.Qf6!
      • threat
        • 2.Sc3#
      • 1...Sxa3
        • 2.Qd4#
      • 1...Rg3
        • 2.Qd6#
      • 1...Rg4
        • 2.Qe6#
      • 1...Be5
        • 2.Qxc6#
      • 1...Be6
        • 2.Qxe6#
      • 1...Sa1
        • 2.Qd4#
      • 1...Se1
        • 2.Qd4#
      • 1...Se3
        • 2.Qd4#
      • 1...Sb4
        • 2.Qd4#
      • 1...Sd4
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • R(h);S_CUTB(d)::R1(E)
    • B(d);N_GUARD::R1(E)
    • B(d);N_GUARD::R1(E),XB(d)
    • S(b);N_GUARD::QAR1(A)
    • S(b);N_GUARD,XS(B)::QAR1(A)
    • S(b);N_GUARD::QAR1(A),XS(b)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • P(g);P_SPINP(g)::QAR1(A),XP(g)
      • Refutation
        • P(g);CHECK,XQ(A)
  • Actual
    • Q(A);
    • Threat
      • S(D)
    • Vars
      • S(b);N_GUARD,XS(B)::QAR1(A)
      • R(h);S_CUTB(d)::QAR1(A)
      • R(h);P_PINS(D),S_CUTB(e)::QAB1(A)
      • B(d);SBLOCK::QAB1(A),XP(g)
      • B(e);N_GUARD::QAB1(A),XB(e)
      • S(b);N_GUARD::QAR1(A)
      • S(b);N_GUARD::QAR1(A),XS(b)
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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).