MESON Chess Problem Database

Problem Display
PID: 240447 (2k1B3/4K3/1Q6/8/4N3/1p6/8/3q4 w - - 0 1)

Parkhomenko, Nikolai A

Mat, 1977

2k1B3/4K3/1Q6/8/4N3/1p6/8/3q4

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qc2
      • 2.Sd6#
      • 2.Bd7#
    • 1...Qe2
      • 2.Bd7#
    • 1...Qf3
      • 2.Sd6#
      • 2.Bd7#
    • 1...Qg4
      • 2.Sd6#
    • 1...Qh5
      • 2.Sd6#
      • 2.Bd7#
    • 1...Qa1
      • 2.Sd6#
      • 2.Bd7#
    • 1...Qb1
      • 2.Sd6#
      • 2.Bd7#
    • 1...Qc1
      • 2.Sd6#
      • 2.Bd7#
    • 1...Qe1
      • 2.Bd7#
    • 1...Qf1
      • 2.Sd6#
      • 2.Bd7#
    • 1...Qg1
      • 2.Sd6#
      • 2.Bd7#
    • 1...Qh1
      • 2.Sd6#
      • 2.Bd7#
    • 1...Qd6+
      • 2.Sxd6#
    • 1...Qd7+
      • 2.Bxd7#
  • Keys
    • 1.Bc6!
      • threat
        • 2.Qb7#
      • 1...Qd6+
        • 2.Sxd6#
      • 1...Qd7+
        • 2.Bxd7#
      • 1...Qd8+
        • 2.Qxd8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • Q(a);N_GUARD,P_PINS(A)::B(D)
    • Q(a);N_GUARD::S(A)
    • Q(a);CHECK,N_GUARD::S(A),XQ(a)
    • Q(a);CHECK,N_GUARD::B(D),XQ(a)
  • Actual
    • B(D);
    • Threat
      • QAB1(B)
    • Vars
      • Q(a);CHECK,N_GUARD::S(A),XQ(a)
      • Q(a);CHECK,N_GUARD::B(D),XQ(a)
      • Q(a);CHECK,N_GUARD::QAR1(B),XQ(a)
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