MESON Chess Problem Database

Problem Display
PID: 18831 (3BB2b/6Pp/4PK2/5P2/3R2bk/2r4N/7P/4qQ2 w - - 0 1)

Kalinin, Aleksandr Konstantinovich

Shakhmaty v SSSR, 1958

3BB2b/6Pp/4PK2/5P2/3R2bk/2r4N/7P/4qQ2

#2

10 + 6

3976 FIDE Album (1956-1958) 1961

SOLUTION

  • SOUND
  • Sets
    • 1...Qf2
      • 2.Ke5#
    • 1...Qa1
      • 2.Ke5#
    • 1...Qb1
      • 2.Ke5#
    • 1...Qd1
      • 2.Ke5#
    • 1...Qe5+
      • 2.Kxe5#
    • 1...Qxe6+
      • 2.Kxe6#
    • 1...Bxg7+
      • 2.Kxg7#
    • 1...h5
      • 2.Kg6#
      • 2.Kf7#
    • 1...h6
      • 2.Kg6#
  • Tries
    • 1.Qxe1+?
      • 1...Rg3
        • 2.Qxg3#
      • 1...Kxh3!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Kf7#
      • 1...Qe5+
        • 2.Kxe5#
      • 1...Qxe6+
        • 2.Kxe6#
      • 1...Bxg7+
        • 2.Kxg7#
      • 1...Bxf5
        • 2.Kxf5#
      • 1...Bd1
        • 2.Se2#
      • 1...Be2
        • 2.Sxe2#
      • 1...Bf3
        • 2.Qh3#
      • 1...Bh3
        • 2.Sg2#
      • 1...Bh5
        • 2.Sg6#
      • 1...Rc7
        • 2.Qxe1#
      • 1...Rc8
        • 2.Qxe1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 5
  • Sets
    • Q(a);N_PINP(H),P_PINP(E)::B(I)+K(G)
    • Q(a);::B(I)+K(G)
    • Q(a);CHECK::B(I)+K(G),XQ(a)
    • Q(a);CHECK,XP(F)::B(I)+K(G),XQ(a)
    • B(f);CHECK,XP(H)::B(I)+K(G),XB(f)
    • P(e);::B(I)+K(G)
  • Tries
    • Try
      • Q(A);CHECK,XQ(a)
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::QAB1(A),XR(b)
      • Refutation
        • K(d);N_SPINB(c),P-FLIGHT,XS(C)
  • Actual
    • S(C);N_PINB(c)
    • Threat
      • B(I)+K(G)
    • Vars
      • Q(a);CHECK::B(I)+K(G),XQ(a)
      • Q(a);CHECK,XP(F)::B(I)+K(G),XQ(a)
      • B(f);CHECK,XP(H)::B(I)+K(G),XB(f)
      • B(c);XP(E)::B(I)+K(G),XB(c)
      • B(c);::R(D)+S(C)
      • B(c);::R(D)+S(C),XB(c)
      • B(c);N_GUARD,S_CUTR(b)::QAR1(A)
      • B(c);SBLOCK::R(D)+S(C),DCHECK
      • R(b);N_GUARD::QAB(A),XQ(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).