MESON Chess Problem Database

Problem Display
PID: 6165 (1K6/8/8/1B6/5N2/3Q2P1/5k1b/8 w - - 0 1)

Kainer, Cenek

Prager Presse, 1927

1K6/8/8/1B6/5N2/3Q2P1/5k1b/8

#2

5 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Ke1
      • 2.Qe2#
    • 1...Kg1
      • 2.Qf1#
  • Tries
    • 1.Sh3+?
      • 1...Ke1
        • 2.Qe2#
      • 1...Kg2!
    • 1.Qe2+?
      • 1...Kg1
        • 2.Qf1#
        • 2.Qe1#
        • 2.Qg2#
      • 1...Kxg3!
    • 1.Qf3+?
      • 1...Ke1
        • 2.Qe2#
      • 1...Kg1
        • 2.Se2#
        • 2.Sh3#
        • 2.Qg2#
        • 2.Qf1#
      • 1...Kxf3!
  • Keys
    • 1.Sh5!
      • 1...Bxg3+
        • 2.Qxg3#
      • 1...Ke1
        • 2.Qe2#
      • 1...Kg1
        • 2.Qf1#
      • 1...Kg2
        • 2.Qf1#
      • 1...Bg1
        • 2.Qe2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAR1(A)
  • Tries
    • Try
      • S(C);CHECK,P_SPINP(B)
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);S_FLIGHT,XP(B)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT,XQ(A)
  • Actual
    • S(C);P_SPINP(B)
    • Vars
      • B(b);CHECK,OGATE,XP(B)::QAB1(A),XB(b)
      • K(a);S_FLIGHT::QAR1(A)
      • K(a);P-FLIGHT::QAB1(A)
      • B(b);N_PINP(B),SBLOCK::QAR1(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).