MESON Chess Problem Database

Problem Display
PID: 206500 (8/8/pN3p2/Q1pp1K2/n2k4/8/3PP3/8 w - - 0 1)

Kovats, Aranka

Uj Nemezdek, 1925

8/8/pN3p2/Q1pp1K2/n2k4/8/3PP3/8

#2

5 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sb2
      • 2.Qc3#
    • 1...Sc3
      • 2.Qxc3#
    • 1...Sxb6
      • 2.Qc3#
    • 1...c4
      • 2.Qxd5#
  • Tries
    • 1.Kf4?
      • 1...Sxb6
        • 2.Qc3#
      • 1...Sb2
        • 2.Qc3#
      • 1...Sc3
        • 2.Qxc3#
        • 2.dxc3#
      • 1...c4
        • 2.Qxd5#
      • 1...f5!
    • 1.Sxa4?
      • threat
        • 2.Qc3#
        • 2.Qxc5#
      • 1...c4
        • 2.Qc3#
        • 2.Qb6#
        • 2.Qc5#
      • 1...Kc4!
    • 1.Sd7?
      • 1...Kc4
        • 2.Qxa4#
      • 1...Sb2
        • 2.Qc3#
        • 2.Qxc5#
      • 1...Sc3
        • 2.Qxc3#
        • 2.Qxc5#
      • 1...Sb6
        • 2.Qc3#
        • 2.Qxc5#
      • 1...c4!
    • 1.Sa8?
      • 1...Kc4
        • 2.Qxa4#
      • 1...Sb2
        • 2.Qc3#
      • 1...Sc3
        • 2.Qxc3#
      • 1...Sb6
        • 2.Qc3#
      • 1...c4!
    • 1.Sc8?
      • 1...Kc4
        • 2.Qxa4#
      • 1...Sb2
        • 2.Qc3#
      • 1...Sc3
        • 2.Qxc3#
      • 1...Sb6
        • 2.Qc3#
      • 1...c4!
    • 1.Qb5?
      • threat
        • 2.Qd3#
        • 2.e3#
      • 1...c4
        • 2.Qxd5#
      • 1...Sb2
        • 2.Qxb2#
        • 2.e3#
      • 1...axb5!
    • 1.Qxa6?
      • threat
        • 2.Qd3#
        • 2.e3#
      • 1...Sb2
        • 2.e3#
      • 1...c4!
  • Keys
    • 1.Sc4!
      • 1...Kxc4
        • 2.Qxa4#
      • 1...dxc4
        • 2.Qd8#
      • 1...Sb2
        • 2.Qc3#
      • 1...Sc3
        • 2.Qxc3#
      • 1...Sb6
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • S(a);N_GUARD::QAB1(C)
    • S(a);N_GUARD::QAB1(C),XS(a)
    • S(a);N_GUARD,XS(E)::QAB1(C)
    • P(c);OGATE::QAR1(C),XP(d)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Vars
        • S(a);N_GUARD,XS(E)::QAB1(C)
        • S(a);N_GUARD::QAB1(C)
        • P(c);OGATE::QAR1(C),XP(d)
      • Refutation
        • P(f);
    • Try
      • S(E);XS(a)
      • Threat
        • DUALS(2)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • S(E);
      • Vars
        • K(b);P-FLIGHT::QAR2(C),XS(a)
      • Refutation
        • P(c);
    • Try
      • S(E);
      • Vars
        • K(b);P-FLIGHT::QAR2(C),XS(a)
        • S(a);N_GUARD::QAB1(C)
        • S(a);N_GUARD::QAB1(C),XS(a)
      • Refutation
        • P(c);
    • Try
      • S(E);
      • Vars
        • K(b);P-FLIGHT::QAR2(C),XS(a)
        • S(a);N_GUARD::QAB1(C)
        • S(a);N_GUARD::QAB1(C),XS(a)
      • Refutation
        • P(c);
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);OGATE::QAR1(C),XP(d)
      • Refutation
        • P(e);XQ(C)
    • Try
      • Q(C);XP(e)
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::P(B)
      • Refutation
        • P(c);
  • Actual
    • S(E);
    • Vars
      • K(b);OGATEB,P-FLIGHT,XS(E)::QAR2(C),XS(a)
      • P(d);OGATEB,SBLOCK,XS(E)::QAR(C)
      • S(a);N_GUARD::QAB1(C)
      • S(a);N_GUARD::QAB1(C),XS(a)
HTML5 logo

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).