MESON Chess Problem Database

Problem Display
PID: 161756 (1K1k4/2Nbb3/8/8/B3Q3/8/8/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 1996

1K1k4/2Nbb3/8/8/B3Q3/8/8/8

#2

4 + 3

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Be6
      • 2.Sxe6#
    • 1...Be8
      • 2.Se6#
    • 1...Bh4
      • 2.Qxh4#
  • Tries
    • 1.Se6+?
      • 1...Ke8
        • 2.Qg6#
      • 1...Bxe6!
    • 1.Bxd7?
      • 1...Ba3
        • 2.Qe8#
      • 1...Bb4
        • 2.Qe8#
      • 1...Bh4
        • 2.Qe8#
      • 1...Bc5
        • 2.Qe8#
      • 1...Bg5
        • 2.Qe8#
      • 1...Bd6
        • 2.Qe8#
      • 1...Bf6
        • 2.Qe8#
      • 1...Bf8
        • 2.Qe8#
      • 1...Kxd7!
    • 1.Qf5?
      • threat
        • 2.Qxd7#
      • 1...Bxa4
        • 2.Qc8#
      • 1...Bb5
        • 2.Qc8#
      • 1...Bc6
        • 2.Qc8#
      • 1...Be6
        • 2.Sxe6#
      • 1...Bc8
        • 2.Qxc8#
      • 1...Be8
        • 2.Se6#
        • 2.Qc8#
      • 1...Bxf5!
    • 1.Qc6?
      • threat
        • 2.Qxd7#
      • 1...Bh3
        • 2.Qe8#
      • 1...Bg4
        • 2.Qe8#
      • 1...Bf5
        • 2.Qe8#
      • 1...Be6
        • 2.Sxe6#
        • 2.Qe8#
      • 1...Bc8
        • 2.Qe8#
      • 1...Be8
        • 2.Se6#
        • 2.Qxe8#
      • 1...Bxc6!
  • Keys
    • 1.Qe6!
      • threat
        • 2.Qxd7#
      • 1...Bxa4
        • 2.Qc8#
      • 1...Bxe6
        • 2.Sxe6#
      • 1...Bb5
        • 2.Qc8#
      • 1...Bc6
        • 2.Qc8#
      • 1...Bc8
        • 2.Qxc8#
      • 1...Be8
        • 2.Qc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • B(a);N_GUARD::S(C),XB(a)
    • B(a);N_GUARD::S(C)
    • B(b);OGATEB::QAB(B),XB(b)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(c);P-FLIGHT,P_SPINB(a)::QAB(B)
      • Refutation
        • B(a);XS(C)
    • Try
      • B(A);XB(a)
      • Vars
        • B(b);OGATE::QAR1(B)
        • B(b);OGATE,P_PINS(C)::QAR1(B)
      • Refutation
        • K(c);P-FLIGHT,XB(A)
    • Try
      • Q(B);
      • Threat
        • QAR1(B),XB(a)
      • Vars
        • B(a);OGATE,XB(A)::QAR1(B)
        • B(a);OGATE::QAR1(B)
        • B(a);N_GUARD::S(C),XB(a)
        • B(a);OGATE::QAR1(B),XB(a)
      • Refutation
        • B(a);XQ(B)
    • Try
      • Q(B);
      • Threat
        • QAR1(B),XB(a)
      • Vars
        • B(a);OGATE::QAR1(B)
      • Refutation
        • B(a);XQ(B)
  • Actual
    • Q(B);
    • Threat
      • QAR1(B),XB(a)
    • Vars
      • B(a);OGATE,XB(A)::QAR1(B)
      • B(a);XQ(B)::S(C),XB(a)
      • B(a);OGATE::QAR1(B)
      • B(a);OGATE::QAR1(B),XB(a)
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