MESON Chess Problem Database

Problem Display
PID: 233021 (Q7/6p1/6pk/7N/6P1/6K1/8/8 w - - 0 1)

Kozhakin, Vladimir Vladimirovich

Kudesnik, 2010

Q7/6p1/6pk/7N/6P1/6K1/8/8

#2

4 + 3

5454 Near Snap 2021
15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qc6?
      • 1...Kg5
        • 2.Qc1#
      • 1...Kh7!
    • 1.Qa1?
      • 1...Kg5
        • 2.Qc1#
      • 1...Kh7
        • 2.Qxg7#
      • 1...g5
        • 2.Qxg7#
      • 1...gxh5!
    • 1.Qa7?
      • 1...Kg5
        • 2.Qe3#
      • 1...Kh7
        • 2.Qxg7#
      • 1...g5
        • 2.Qxg7#
      • 1...gxh5!
    • 1.Qf8?
      • 1...Kg5
        • 2.Qf4#
      • 1...Kh7
        • 2.Qxg7#
      • 1...g5
        • 2.Qxg7#
      • 1...gxh5!
  • Keys
    • 1.Qh1!
      • 1...Kg5
        • 2.Qc1#
      • 1...Kh7
        • 2.Sf6#
      • 1...gxh5
        • 2.Qxh5#
      • 1...g5
        • 2.Sf4#

Anticipated by 24473(1974)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(D);P_PINP(a)
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::QAB(D)
      • Refutation
        • K(b);N_SPINP(a),P-FLIGHT
    • Try
      • Q(D);
      • Vars
        • K(b);S_FLIGHT::QAB(D)
        • K(b);P-FLIGHT::QAR1(D),XP(c)
        • P(a);::QAB1(D),XP(c)
      • Refutation
        • P(a);XS(C)
    • Try
      • Q(D);
      • Vars
        • K(b);S_FLIGHT::QAB(D)
        • K(b);P-FLIGHT,P_SPINP(c)::QAR1(D),XP(c)
        • P(a);::QAB1(D),XP(c)
      • Refutation
        • P(a);XS(C)
    • Try
      • Q(D);P_PINP(c)
      • Vars
        • K(b);N_SPINP(c),S_FLIGHT::QAB1(D)
        • K(b);N_SPINP(c),P-FLIGHT::QAR1(D),XP(c)
        • P(a);::QAB1(D),XP(c)
      • Refutation
        • P(a);XS(C)
  • Actual
    • Q(D);
    • Vars
      • K(b);S_FLIGHT::QAB(D)
      • K(b);P-FLIGHT::QAR(D)+S(C),DCHECK
      • P(a);OGATE,P_SPINP(a),XS(C)::QAR1(D),XP(a)
      • P(a);SBLOCK::QAR(D)+S(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).