MESON Chess Problem Database

Problem Display
PID: 27356 (8/K7/Q7/1p6/1p6/1k6/1N1R4/8 w - - 0 1)

Mosiashvili, Givi

StrateGems, 2001

8/K7/Q7/1p6/1p6/1k6/1N1R4/8

#2

4 + 3

3713 Snap 2012
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qxb5?
      • 1...Ka3
        • 2.Qa4#
      • 1...Kc3
        • 2.Qd3#
      • 1...Ka2!
    • 1.Qa2+?
      • 1...Kc3
        • 2.Sd1#
      • 1...Kxa2!
    • 1.Qa4+?
      • 1...Kc3
        • 2.Qc2#
      • 1...bxa4!
    • 1.Qe6+?
      • 1...Kc3
        • 2.Qe3#
      • 1...Ka3!
  • Keys
    • 1.Sa4!
      • 1...Ka3
        • 2.Sc5#
      • 1...Kc4
        • 2.Qe6#
      • 1...bxa4
        • 2.Qd3#

Anticipated by 9360(1901), 144059(1907), 107321(1909), 142465(1972)

This anticipates 198081(2015)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);P_PINP(b),XP(c)
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT::QAR1(C)
      • Refutation
        • K(a);N_SPINP(b),S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT::S(A)
      • Refutation
        • K(a);S_FLIGHT,XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAR1(C)
      • Refutation
        • P(c);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR2(C)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • S(A);
    • Vars
      • K(a);P-FLIGHT::QAR(C)+S(A)
      • K(a);P_SPINP(c),S_FLIGHT::QAB(C)
      • P(c);OGATE,SBLOCK,XS(A)::QAR2(C)
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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).