MESON Chess Problem Database

Problem Display
PID: 17152 (8/8/6p1/4Q3/7k/2B4P/5K2/5b2 w - - 0 1)

Kalina, Vasily Emanuilovich

64 Shakhmatnoe obozrenie, 1925

8/8/6p1/4Q3/7k/2B4P/5K2/5b2

#2

4 + 3

3296 Shakhmatny zadachi miniaturi 1987
3813 300 Sachmatu Uzdaviniu 1991
3713 Snap 2009
145 StrateGems 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxh3
      • 2.Qg3#
    • 1...g5
      • 2.Qh8#
  • Tries
    • 1.Bd2?
      • threat
        • 2.Qh8#
      • 1...Kxh3
        • 2.Qg3#
      • 1...Bxh3
        • 2.Qg5#
      • 1...Be2!
    • 1.Qf4+?
      • 1...Kxh3
        • 2.Qg3#
      • 1...Kh5!
    • 1.Qg5+?
      • 1...Kxh3
        • 2.Qg3#
      • 1...Kxg5!
  • Keys
    • 1.Be1!
      • 1...Kxh3
        • 2.Qg3#
      • 1...Bxh3
        • 2.Kf3#
      • 1...g5
        • 2.Qh8#
      • 1...Be2
        • 2.Kg2#
      • 1...Bg2
        • 2.Kxg2#
      • 1...Bd3
        • 2.Kg2#
      • 1...Bc4
        • 2.Kg2#
      • 1...Bb5
        • 2.Kg2#
      • 1...Ba6
        • 2.Kg2#

Anticipated by 125408(0000)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT,XP(C)::QAR1(D)
    • P(c);SBLOCK::QAR(D)
  • Tries
    • Try
      • B(B);
      • Threat
        • QAR(D)
      • Vars
        • K(b);P-FLIGHT,XP(C)::QAR1(D)
        • B(a);SBLOCK,XP(C)::QAB1(D)
      • Refutation
        • B(a);
    • Try
      • Q(D);CHECK
      • Vars
        • K(b);P-FLIGHT,XP(C)::QAR1(D)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(b);P-FLIGHT,XP(C)::QAR1(D)
      • Refutation
        • K(b);S_FLIGHT,XQ(D)
  • Actual
    • B(B);
    • Vars
      • K(b);P-FLIGHT,XP(C)::QAR1(D)
      • B(a);SBLOCK,XP(C)::B(B)+K(A)
      • P(c);SBLOCK::QAR(D)
      • B(a);::B(B)+K(A)
      • B(a);::B(B)+K(A),XB(a)
      • B(a);SBLOCK::B(B)+K(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).