MESON Chess Problem Database

Problem Display
PID: 7948 (5B2/8/5P2/5Q2/6nk/8/8/5NK1 w - - 0 1)

Subotic, Miroslav

The Problemist, 1994

5B2/8/5P2/5Q2/6nk/8/8/5NK1

#2

5 + 2

5454 Near Snap 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kh3
      • 2.Qh5#
  • Tries
    • 1.Bb4?
      • 1...Kh3
        • 2.Qh5#
      • 1...Sxf6
        • 2.Be1#
      • 1...Sh2
        • 2.Be1#
      • 1...Se3
        • 2.Be1#
      • 1...Se5
        • 2.Be1#
      • 1...Sh6
        • 2.Be1#
      • 1...Sf2!
    • 1.Bc5?
      • 1...Kh3
        • 2.Qh5#
      • 1...Sxf6
        • 2.Bf2#
      • 1...Sf2
        • 2.Bxf2#
      • 1...Sh2
        • 2.Bf2#
      • 1...Se5
        • 2.Bf2#
      • 1...Sh6
        • 2.Bf2#
      • 1...Se3!
    • 1.Bd6?
      • 1...Kh3
        • 2.Qh5#
      • 1...Sxf6
        • 2.Bg3#
      • 1...Sf2
        • 2.Bg3#
      • 1...Sh2
        • 2.Bg3#
      • 1...Se3
        • 2.Bg3#
      • 1...Sh6
        • 2.Bg3#
      • 1...Se5!
    • 1.Qf4?
      • 1...Kh3
        • 2.Qg3#
      • 1...Kh5!
    • 1.Qg5+?
      • 1...Kh3
        • 2.Qh5#
      • 1...Kxg5!
    • 1.f7?
      • 1...Kh3
        • 2.Qh5#
      • 1...Sf2
        • 2.Be7#
      • 1...Sh2
        • 2.Be7#
      • 1...Se3
        • 2.Be7#
      • 1...Se5
        • 2.Be7#
      • 1...Sh6
        • 2.Be7#
      • 1...Sf6!
  • Keys
    • 1.Be7!
      • 1...Kh3
        • 2.Qh5#
      • 1...Sxf6
        • 2.Bxf6#
      • 1...Sf2
        • 2.f7#
      • 1...Sh2
        • 2.f7#
      • 1...Se3
        • 2.f7#
      • 1...Se5
        • 2.f7#
      • 1...Sh6
        • 2.f7#

Anticipated by 109451(1982), 249547(1988)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT,P_SPINS(a)::QAR2(C)
  • Tries
    • Try
      • B(E);
      • Vars
        • K(b);P-FLIGHT,P_SPINS(a)::QAR2(C)
        • S(a);N_GUARD,XP(D)::B(E)
        • S(a);N_GUARD::B(E)
      • Refutation
        • S(a);
    • Try
      • B(E);
      • Vars
        • K(b);P-FLIGHT,P_SPINS(a)::QAR2(C)
        • S(a);N_GUARD,XP(D)::B(E)
        • S(a);N_GUARD::B(E),XS(a)
        • S(a);N_GUARD::B(E)
      • Refutation
        • S(a);
    • Try
      • B(E);
      • Vars
        • K(b);P-FLIGHT,P_SPINS(a)::QAR2(C)
        • S(a);XP(D)::B(E)
        • S(a);::B(E)
      • Refutation
        • S(a);
    • Try
      • Q(C);P_PINS(a)
      • Vars
        • K(b);N_SPINS(a),P-FLIGHT::QAR1(C)
      • Refutation
        • K(b);N_SPINS(a),P-FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR2(C)
      • Refutation
        • K(b);S_FLIGHT,XQ(C)
    • Try
      • P(D);
      • Vars
        • K(b);P-FLIGHT,P_SPINS(a)::QAR2(C)
        • S(a);N_GUARD::B(E)
      • Refutation
        • S(a);
  • Actual
    • B(E);
    • Vars
      • K(b);P-FLIGHT,P_SPINS(a)::QAR2(C)
      • S(a);OGATE,P_SPINS(a),XP(D)::B(E),XS(a)
      • S(a);N_GUARD::B(E)+P(D)
HTML5 logo

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).