MESON Chess Problem Database

Problem Display
PID: 125584 (1bN4K/pB3Q1p/2P5/Rnp1k3/3Np3/B3q3/1Pr1RP2/4r3 w - - 0 1)

Goldschmidt, Josef

Bamahane, 1949

1bN4K/pB3Q1p/2P5/Rnp1k3/3Np3/B3q3/1Pr1RP2/4r3

#2

11 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qc1
      • 2.Sf3#
    • 1...Qd2
      • 2.Sf3#
    • 1...Qxd4
      • 2.f4#
    • 1...Qg5
      • 2.Sf3#
    • 1...Qh6
      • 2.Sf3#
    • 1...Qf3
      • 2.Sxf3#
  • Tries
    • 1.Qd5+?
      • 1...Kf4
        • 2.Qf5#
      • 1...Kf6
        • 2.Qf5#
      • 1...Kxd5!
    • 1.Qe6+?
      • 1...Kf4
        • 2.Qf5#
      • 1...Kxd4!
    • 1.Qg7+?
      • 1...Kf4
        • 2.fxe3#
      • 1...Kd5!
  • Keys
    • 1.c7!
      • threat
        • 2.Sc6#
      • 1...Kxd4
        • 2.Qd5#
      • 1...Qxd4
        • 2.f4#
      • 1...Sxd4
        • 2.cxb8Q#
        • 2.cxb8B#
      • 1...cxd4
        • 2.Bd6#
      • 1...Qh6
        • 2.Sf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • Q(c);N_GUARD,P_SPINP(d)::S(E)
    • Q(c);N_GUARD,P_SPINP(d),SBLOCK,XS(E)::P(C)
    • Q(c);N_GUARD,P_SPINP(d)::S(E),XQ(c)
  • Tries
    • Try
      • Q(I);CHECK
      • Vars
        • K(g);OGATE,S_FLIGHT::QAR1(I)
      • Refutation
        • K(g);P-FLIGHT,XQ(I)
    • Try
      • Q(I);CHECK
      • Vars
        • K(g);S_FLIGHT::QAR1(I)
      • Refutation
        • K(g);S_FLIGHT,XS(E)
    • Try
      • Q(I);CHECK
      • Vars
        • K(g);S_FLIGHT::P(C),XQ(c)
      • Refutation
        • K(g);P-FLIGHT
  • Actual
    • P(G);
    • Threat
      • S(E)
    • Vars
      • K(g);S_FLIGHT,XS(E)::QAR1(I)
      • Q(c);N_GUARD,P_SPINP(d),SBLOCK,XS(E)::P(C)
      • S(e);N_GUARD,P_SPINP(f),SBLOCK,XS(E)::PXB(j)=Q
      • P(f);OGATE,P_SPINS(e),SBLOCK,XS(E)::B(D)
      • Q(c);N_GUARD,P_SPINP(d)::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).