MESON Chess Problem Database

Problem Display
PID: 237295 (3B4/3p4/3K4/1kN5/1pN1Q3/1b6/P7/8 w - - 0 1)

Palkoska, Emil

Schweizerische Arbeiter Schachzeitung, 1905

3B4/3p4/3K4/1kN5/1pN1Q3/1b6/P7/8

#2

6 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bxc4
      • 2.Qb7#
  • Tries
    • 1.Kd5?
      • 1...Bxc4+
        • 2.Qxc4#
      • 1...Bd1
        • 2.Sd6#
      • 1...Bc2
        • 2.Sd6#
      • 1...Ba4
        • 2.Sd6#
      • 1...d6
        • 2.Qe8#
      • 1...Bxa2!
    • 1.Sxd7?
      • threat
        • 2.Qc6#
      • 1...Ka4
        • 2.Qc6#
      • 1...Ka6!
    • 1.a4+?
      • 1...bxa4 ep
        • 2.Sxa3#
      • 1...Bxa4!
  • Keys
    • 1.Qb1!
      • 1...Kxc4
        • 2.Qd3#
      • 1...Bxa2
        • 2.Sa3#
      • 1...Bxc4
        • 2.a4#
      • 1...Bd1
        • 2.Sa3#
      • 1...Bc2
        • 2.Sa3#
      • 1...Ba4
        • 2.Sa3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • B(a);SBLOCK,XS(B)::QAR2(C)
  • Tries
    • Try
      • K(E);P-FLIGHT,P_SPINS(B)
      • Vars
        • B(a);CHECK,OGATE,XS(B)::QAB1(C),XB(a)
        • B(a);N_PINS(B)::S(B)
        • P(d);OGATEB::QAB(C)
      • Refutation
        • B(a);XP(A)
    • Try
      • S(D);XP(d)
      • Threat
        • QAB1(C)
      • Vars
        • K(c);S_FLIGHT::QAB(C)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • P(A);CHECK
      • Vars
        • P(b);EP,XP(A)::S(B),XP(b)
      • Refutation
        • B(a);XP(A)
  • Actual
    • Q(C);
    • Vars
      • K(c);OGATEB,S_FLIGHT,XS(B)::QAB1(C)
      • B(a);P_SPINP(b),XP(A)::S(B)
      • B(a);N_GUARD,P_SPINP(b),SBLOCK,XS(B)::P(A)
      • B(a);P_SPINP(b)::S(B)
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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).