MESON Chess Problem Database

Problem Display
PID: 276421 (3Nk3/1K6/6N1/6b1/b2Q4/5B2/8/8 w - - 0 1)

Kuligin, Nikolai Volodimirovich

Mat, 1981

3Nk3/1K6/6N1/6b1/b2Q4/5B2/8/8

#2

5 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Bd1
      • 2.Bc6#
    • 1...Bc2
      • 2.Bc6#
    • 1...Bb3
      • 2.Bc6#
    • 1...Bc6+
      • 2.Bxc6#
    • 1...Bd7
      • 2.Qh8#
  • Tries
    • 1.Kc8?
      • threat
        • 2.Qh8#
        • 2.Qxa4#
      • 1...Bd7+
        • 2.Qxd7#
      • 1...Bb5
        • 2.Qh8#
      • 1...Bd1
        • 2.Bc6#
        • 2.Qh8#
        • 2.Qd7#
      • 1...Bc2
        • 2.Bc6#
        • 2.Qh8#
        • 2.Qd7#
      • 1...Bb3
        • 2.Bc6#
        • 2.Qd7#
      • 1...Bc6
        • 2.Bxc6#
        • 2.Qh8#
      • 1...Bf6
        • 2.Qxa4#
      • 1...Bh6
        • 2.Qe5#
        • 2.Qxa4#
        • 2.Qe4#
      • 1...Be7
        • 2.Qxa4#
      • 1...Bxd8!
  • Keys
    • 1.Bd5!
      • threat
        • 2.Bf7#
      • 1...Bc6+
        • 2.Bxc6#
      • 1...Kd7
        • 2.Bc6#
        • 2.Bf7#
      • 1...Kxd8
        • 2.Bc6#
      • 1...Bxd8
        • 2.Qxa4#
      • 1...Bb3
        • 2.Bc6#
      • 1...Bd7
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(a);N_GUARD::B(A)
    • B(a);CHECK,N_GUARD::B(A),XB(a)
    • B(a);SBLOCK::QAR(B)
  • Tries
    • Try
      • K(D);S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • B(a);CHECK,N_GUARD::QAB1(B),XB(a)
        • B(a);::QAR(B)
        • B(b);::QAB(B),XB(a)
      • Refutation
        • B(b);XS(E)
  • Actual
    • B(A);
    • Threat
      • B(A)
    • Vars
      • B(a);CHECK,N_GUARD::B(A),XB(a)
      • K(c);P-FLIGHT,S_CUTB(a),XS(E)::QAR(B)+B(A)
      • B(b);SBLOCK,XS(E)::QAB(B),XB(a)
      • B(a);N_GUARD::B(A)
      • B(a);SBLOCK::QAR(B)
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