MESON Chess Problem Database

Problem Display
PID: 24707 (5K1k/7p/7n/8/3p4/3B4/8/7Q w - - 0 1)

Subotic, Miroslav

The Problemist, 2000

5K1k/7p/7n/8/3p4/3B4/8/7Q

#2

3 + 4

5454 Near Snap 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sg4
      • 2.Qxh7#
    • 1...Sf7
      • 2.Qxh7#
    • 1...Sg8
      • 2.Qxh7#
  • Tries
    • 1.Bc2?
      • 1...Sg4
        • 2.Qxh7#
      • 1...Sf7
        • 2.Qxh7#
      • 1...Sg8
        • 2.Qxh7#
      • 1...d3
        • 2.Qa1#
      • 1...Sf5!
    • 1.Be4?
      • 1...Sg4
        • 2.Qxh7#
      • 1...Sf7
        • 2.Qxh7#
      • 1...Sg8
        • 2.Qxh7#
      • 1...d3
        • 2.Qa1#
      • 1...Sf5!
    • 1.Bf5?
      • 1...Sg4
        • 2.Qxh7#
      • 1...Sf7
        • 2.Qxh7#
      • 1...Sg8
        • 2.Qxh7#
      • 1...d3
        • 2.Qa1#
      • 1...Sxf5!
    • 1.Qg2?
      • threat
        • 2.Qg7#
      • 1...Sf5
        • 2.Qg8#
      • 1...Sg4!
    • 1.Qe4?
      • threat
        • 2.Qxh7#
        • 2.Qxd4#
        • 2.Qe5#
      • 1...Sg4
        • 2.Qxh7#
      • 1...Sf7
        • 2.Qxh7#
      • 1...Sg8
        • 2.Qxh7#
      • 1...Sf5!
    • 1.Qd5?
      • threat
        • 2.Qxd4#
        • 2.Qe5#
      • 1...Sf5
        • 2.Qg8#
      • 1...Sg4
        • 2.Qg8#
      • 1...Sg8
        • 2.Qxg8#
      • 1...Sf7!
    • 1.Qa8?
      • 1...Sf5
        • 2.Kf7#
      • 1...Sg4
        • 2.Kf7#
      • 1...Sf7
        • 2.Kxf7#
      • 1...Sg8!
    • 1.Qg1?
      • threat
        • 2.Qxd4#
        • 2.Qg7#
      • 1...Sf5
        • 2.Qg8#
      • 1...Sf7
        • 2.Qg7#
        • 2.Qg8#
      • 1...Sg8
        • 2.Qg7#
        • 2.Qxg8#
      • 1...Sg4!
    • 1.Qh2?
      • threat
        • 2.Qe5#
      • 1...Sg4
        • 2.Qxh7#
      • 1...Sf7
        • 2.Qxh7#
      • 1...Sg8
        • 2.Qxh7#
      • 1...Sf5!
    • 1.Qh3?
      • 1...Sg4
        • 2.Qxh7#
      • 1...Sf7
        • 2.Qxh7#
      • 1...Sg8
        • 2.Qxh7#
      • 1...Sf5!
    • 1.Qh4?
      • threat
        • 2.Qf6#
        • 2.Qxd4#
      • 1...Sg4
        • 2.Qxh7#
      • 1...Sf7
        • 2.Qf6#
        • 2.Qxh7#
      • 1...Sg8
        • 2.Qxh7#
      • 1...Sf5!
    • 1.Qh5?
      • threat
        • 2.Qe5#
      • 1...Sg4
        • 2.Qxh7#
      • 1...Sf7
        • 2.Qxh7#
      • 1...Sg8
        • 2.Qxh7#
      • 1...Sf5!
  • Keys
    • 1.Bg6!
      • 1...hxg6
        • 2.Qxh6#
      • 1...Sf5
        • 2.Qxh7#
      • 1...Sg4
        • 2.Qxh7#
      • 1...Sf7
        • 2.Qxh7#
      • 1...Sg8
        • 2.Qxh7#
      • 1...d3
        • 2.Qa1#

Anticipated by 81260(1992), 272815(1998)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(b);OGATE,P_SPINP(c)::QAR1(A),XP(c)
  • Tries
    • Try
      • B(B);
      • Vars
        • S(b);OGATE,P_SPINP(c)::QAR1(A),XP(c)
        • P(a);OGATEB::QAB(A)
      • Refutation
        • S(b);P_SPINP(c)
    • Try
      • B(B);
      • Vars
        • S(b);OGATE,P_SPINP(c)::QAR1(A),XP(c)
        • P(a);OGATEB::QAB(A)
      • Refutation
        • S(b);P_SPINP(c)
    • Try
      • B(B);
      • Vars
        • S(b);OGATE,P_SPINP(c)::QAR1(A),XP(c)
        • P(a);OGATEB::QAB(A)
      • Refutation
        • S(b);P_SPINP(c),XB(B)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • S(b);N_GUARD::QAR1(A)
      • Refutation
        • S(b);
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • S(b);::QAR1(A),XP(c)
      • Refutation
        • S(b);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);N_GUARD::QAR1(A)
        • S(b);N_GUARD::QAR1(A),XS(b)
      • Refutation
        • S(b);
    • Try
      • Q(A);
      • Vars
        • S(b);::QAR(A)+K(C)
        • S(b);::QAR(A)+K(C),XS(b)
      • Refutation
        • S(b);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);N_GUARD::QAR1(A)
      • Refutation
        • S(b);
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • S(b);OGATE,P_SPINP(c)::QAR1(A),XP(c)
      • Refutation
        • S(b);P_SPINP(c)
    • Try
      • Q(A);
      • Vars
        • S(b);OGATE,P_SPINP(c)::QAR1(A),XP(c)
      • Refutation
        • S(b);P_SPINP(c)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);OGATE,P_SPINP(c)::QAR1(A),XP(c)
      • Refutation
        • S(b);P_SPINP(c)
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • S(b);OGATE,P_SPINP(c)::QAR1(A),XP(c)
      • Refutation
        • S(b);P_SPINP(c)
  • Actual
    • B(B);
    • Vars
      • P(c);OGATEB,P_SPINS(b),XB(B)::QAR2(A),XS(b)
      • S(b);OGATE,P_SPINP(c)::QAR1(A),XP(c)
      • P(a);OGATEB::QAB(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).