MESON Chess Problem Database

Problem Display
PID: 179799 (6br/2N2p1n/5k2/7P/4P2K/B4P2/6Q1/b7 w - - 0 1)

Zalkind, Lazar Borissovich

Casopis ceskoslovenskych sachistu, 1910

6br/2N2p1n/5k2/7P/4P2K/B4P2/6Q1/b7

#2

7 + 6

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bb2
      • 2.Qxb2#
    • 1...Sg5
      • 2.Qxg5#
    • 1...Sf8
      • 2.Qg5#
  • Tries
    • 1.Bf8?
      • threat
        • 2.Qg7#
      • 1...Sxf8
        • 2.Qg5#
      • 1...Sg5
        • 2.Qxg5#
      • 1...Ke5!
    • 1.Qg6+?
      • 1...Ke5
        • 2.Qd6#
      • 1...fxg6!
    • 1.h6?
      • threat
        • 2.Qg7#
      • 1...Sg5
        • 2.Qxg5#
      • 1...Ke5!
  • Keys
    • 1.Qd2!
      • 1...Ke5
        • 2.Qd6#
      • 1...Kg7
        • 2.Se8#
      • 1...Bc3
        • 2.Qxc3#
      • 1...Bb2
        • 2.Qxb2#
      • 1...Bd4
        • 2.Qxd4#
      • 1...Be5
        • 2.Qh6#
      • 1...Sg5
        • 2.Qxg5#
      • 1...Sf8
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD::QAB(A),XB(a)
    • S(d);N_GUARD,P_PINP(F)::QAB1(A),XS(d)
    • S(d);N_GUARD,P_PINP(F)::QAB1(A)
  • Tries
    • Try
      • B(B);
      • Threat
        • QAB1(A)
      • Vars
        • S(d);N_GUARD,P_PINP(F),XB(B)::QAB1(A)
        • S(d);N_GUARD,P_PINP(F)::QAB1(A),XS(d)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAB1(A)
      • Refutation
        • P(c);XQ(A)
    • Try
      • P(F);
      • Threat
        • QAB1(A)
      • Vars
        • S(d);N_GUARD,P_PINP(F)::QAB1(A),XS(d)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(b);S_FLIGHT::QAB1(A)
      • K(b);S_FLIGHT::S(G)
      • B(a);N_GUARD::QAB(A),XB(a)
      • B(a);SBLOCK::QAR2(A)
      • S(d);N_GUARD,P_PINP(F)::QAB1(A),XS(d)
      • S(d);N_GUARD,P_PINP(F)::QAB1(A)
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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).