MESON Chess Problem Database

Problem Display
PID: 140995 (4NQ2/8/8/4PP2/5k2/2P2P1R/4B3/2K2R2 w - - 0 1)

Valuska, Jan

1st HM., Cik, 1970

4NQ2/8/8/4PP2/5k2/2P2P1R/4B3/2K2R2

#2

10 + 1

6490 yacpdb 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Kg5
      • 2.f4#
  • Tries
    • 1.Kd1?
      • 1...Ke3
        • 2.Qh6#
      • 1...Kg5
        • 2.f4#
      • 1...Kxe5!
    • 1.Kd2?
      • 1...Kg5
        • 2.f4#
      • 1...Kxe5!
    • 1.Rh4+?
      • 1...Ke3
        • 2.Re4#
      • 1...Kxe5
        • 2.Qc5#
      • 1...Kg5
        • 2.Qf6#
      • 1...Kg3!
    • 1.Qb4+?
      • 1...Ke3
        • 2.Qe4#
      • 1...Kxe5
        • 2.Qe4#
      • 1...Kg5
        • 2.Qg4#
      • 1...Kxf5!
    • 1.Qd6?
      • 1...Ke3
        • 2.Qd2#
      • 1...Kxf5
        • 2.Qf6#
      • 1...Kg5!
    • 1.Qh6+?
      • 1...Kxf5
        • 2.Rh5#
        • 2.Qf6#
      • 1...Kxe5!
    • 1.Qe7?
      • 1...Kxf5
        • 2.Qf6#
      • 1...Ke3!
    • 1.Qg7?
      • 1...Kxf5
        • 2.Qf6#
      • 1...Ke3!
  • Keys
    • 1.Bd3!
      • 1...Ke3
        • 2.f4#
      • 1...Kxe5
        • 2.Qd6#
      • 1...Kg5
        • 2.Qh6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);OGATE,S_FLIGHT::P(E)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(a);S_FLIGHT::QAB(J)
        • K(a);OGATE,S_FLIGHT::P(E)
      • Refutation
        • K(a);S_FLIGHT,XP(G)
    • Try
      • K(A);S_FLIGHT
      • Vars
        • K(a);OGATE,S_FLIGHT::P(E)
      • Refutation
        • K(a);S_FLIGHT,XP(G)
    • Try
      • R(F);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::R1(F)
        • K(a);S_FLIGHT,XP(G)::QAR2(J)
        • K(a);S_FLIGHT::QAB1(J)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(J);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(J)
        • K(a);S_FLIGHT,XP(G)::QAR1(J)
        • K(a);OGATE,S_FLIGHT::QAR1(J)
      • Refutation
        • K(a);P-FLIGHT,XP(H)
    • Try
      • Q(J);
      • Vars
        • K(a);S_FLIGHT::QAB1(J)
        • K(a);OGATEB,P-FLIGHT,XP(H)::QAR1(J)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(J);CHECK
      • Refutation
        • K(a);S_FLIGHT,XP(G)
    • Try
      • Q(J);
      • Vars
        • K(a);OGATEB,P-FLIGHT,XP(H)::QAR1(J)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(J);
      • Vars
        • K(a);OGATEB,P-FLIGHT,XP(H)::QAR1(J)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • B(C);
    • Vars
      • K(a);OGATE,S_FLIGHT::R(F)+P(E)
      • K(a);OGATEB,S_FLIGHT,XP(G)::QAB1(J)
      • K(a);S_FLIGHT::QAB1(J)
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).