MESON Chess Problem Database

Problem Display
PID: 201633 (2Q4B/5p2/3pp3/5p1R/4kN2/4P1K1/nnP5/4R3 w - - 0 1)

Papp, Jeno

Magyar Sakkvilag, 1922

2Q4B/5p2/3pp3/5p1R/4kN2/4P1K1/nnP5/4R3

#2

8 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.Qc4#
    • 1...Sd3
      • 2.Qc4#
      • 2.cxd3#
    • 1...Sa4
      • 2.Qc4#
    • 1...Sc4
      • 2.Qxc4#
    • 1...e5
      • 2.Qxf5#
    • 1...f6
      • 2.Qxe6#
  • Tries
    • 1.Qc5?
      • threat
        • 2.Qd4#
      • 1...e5
        • 2.Qd5#
      • 1...dxc5!
  • Keys
    • 1.Sd5!
      • 1...f4+
        • 2.exf4#
      • 1...Kxd5
        • 2.e4#
      • 1...exd5
        • 2.Qxf5#
        • 2.Qe8#
      • 1...f6
        • 2.Qxe6#
      • 1...Sc1
        • 2.Sc3#
      • 1...Sc3
        • 2.Sxc3#
      • 1...Sb4
        • 2.Sc3#
      • 1...Sd1
        • 2.Qc4#
      • 1...Sd3
        • 2.Qc4#
      • 1...Sa4
        • 2.Qc4#
      • 1...Sc4
        • 2.Qxc4#
      • 1...e5
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD::QAR2(G)
    • S(b);N_GUARD::QAR2(G),XS(b)
    • P(f);OGATE::QAB1(G),XP(d)
    • P(g);N_GUARD::QAR2(G),XP(f)
  • Tries
    • Try
      • Q(G);
      • Threat
        • QAR1(G)
      • Vars
        • P(f);N_GUARD::QAB1(G)
      • Refutation
        • P(e);XQ(G)
  • Actual
    • S(E);
    • Vars
      • P(d);CHECK,OGATE::R(A)+P(C),XP(d)
      • K(c);OGATE,P_SPINP(d),S_FLIGHT,XS(E)::P(C)
      • P(g);N_GUARD::QAR2(G),XP(f)
      • S(a);N_GUARD::S(E)
      • S(a);N_GUARD::S(E),XS(a)
      • S(b);N_GUARD::QAR2(G)
      • S(b);N_GUARD::QAR2(G),XS(b)
      • P(f);SBLOCK::S(E)
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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).