MESON Chess Problem Database

Problem Display
PID: 60227 (5bB1/4p3/8/BNp2b2/3p2p1/p7/PNk1PP1Q/3R2K1 w - - 0 1)

Feoktistov, Aleksandr Fedorovich

3rd Prize, L'Italia Scacchistica, 1968

5bB1/4p3/8/BNp2b2/3p2p1/p7/PNk1PP1Q/3R2K1

#2

10 + 8

3751 FIDE Album (1968-1970) 1977

SOLUTION

  • SOUND
  • Sets
    • 1...axb2
      • 2.Bb3#
  • Tries
    • 1.Sxd4+?
      • 1...Kxb2
        • 2.Qb8#
      • 1...cxd4!
    • 1.Rb1?
      • threat
        • 2.Sxa3#
      • 1...axb2
        • 2.Sa3#
      • 1...Kxb1!
    • 1.Qf4?
      • threat
        • 2.Qc1#
        • 2.Qd2#
      • 1...Kxb2
        • 2.Qc1#
      • 1...axb2
        • 2.Bb3#
        • 2.Qd2#
      • 1...Bh6!
    • 1.Qh6?
      • threat
        • 2.Qc1#
        • 2.Qd2#
      • 1...Kxb2
        • 2.Qc1#
      • 1...axb2
        • 2.Bb3#
        • 2.Qd2#
      • 1...Bxh6!
    • 1.e4?
      • threat
        • 2.f3#
        • 2.f4#
      • 1...Kxb2
        • 2.f3#
        • 2.f4#
      • 1...Bxe4
        • 2.f3#
      • 1...axb2
        • 2.Bb3#
      • 1...dxe4 ep
        • 2.fxe3#
      • 1...Bh6
        • 2.f4#
      • 1...g3
        • 2.fxg3#
      • 1...d3!
    • 1.f3?
      • threat
        • 2.e3#
        • 2.e4#
      • 1...Kxb2
        • 2.e4#
      • 1...axb2
        • 2.Bb3#
      • 1...gxf3
        • 2.exf3#
      • 1...Bd3
        • 2.exd3#
      • 1...Be4
        • 2.e3#
      • 1...Bh6
        • 2.e3#
      • 1...d3
        • 2.exd3#
      • 1...g3!
  • Keys
    • 1.Qb8!
      • threat
        • 2.Sxa3#
      • 1...Kxb2
        • 2.Sxd4#
      • 1...axb2
        • 2.Bb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(b);SBLOCK,XS(D)::B(J)
  • Tries
    • Try
      • S(I);CHECK,XP(c)
      • Vars
        • K(a);P-FLIGHT,XS(D)::QAR(G)
      • Refutation
        • P(e);XS(I)
    • Try
      • R(A);
      • Threat
        • S(I),XP(b)
      • Vars
        • P(b);XS(D)::S(I)
      • Refutation
        • K(a);S_FLIGHT,XR(A)
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT,XS(D)::QAB1(G)
      • Refutation
        • B(h);
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT,XS(D)::QAB1(G)
      • Refutation
        • B(h);XQ(G)
    • Try
      • P(E);
      • Threat
        • DUALS(2)
      • Vars
        • B(f);XP(E)::QAR(G)+P(F)
        • P(b);SBLOCK,XS(D)::B(J)
        • P(c);EP,OGATE,XP(E)::QAR(G)+P(F),XP(c)
        • B(h);::QAR(G)+P(F)
        • P(d);OGATE::QAR(G)+P(F),XP(d)
      • Refutation
        • P(c);
    • Try
      • P(F);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT,XS(D)::QAR(G)+P(E)
        • P(b);SBLOCK,XS(D)::B(J)
        • P(d);OGATE,XP(F)::QAR(G)+P(E),XP(d)
        • B(f);OGATE::QAR(G)+P(E),XB(f)
        • B(f);::QAR(G)+P(E)
        • B(h);::QAR(G)+P(E)
        • P(c);OGATE::QAR(G)+P(E),XP(c)
      • Refutation
        • P(d);
  • Actual
    • Q(G);
    • Threat
      • S(I),XP(b)
    • Vars
      • K(a);P-FLIGHT,XS(D)::QAR(G)+S(I),XP(c)
      • P(b);SBLOCK,XS(D)::B(J)
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