MESON Chess Problem Database

Problem Display
PID: 54370 (6b1/2K5/2N5/2pk4/8/7Q/8/3B4 w - - 0 1)

Lincoln, Robert A

Comm., Amirov MT, 2003

6b1/2K5/2N5/2pk4/8/7Q/8/3B4

#2

4 + 3

145 StrateGems 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Qb3#
    • 1...Ke4
      • 2.Qf3#
    • 1...Be6
      • 2.Qd3#
    • 1...c4
      • 2.Qf5#
  • Tries
    • 1.Be2?
      • threat
        • 2.Qf5#
      • 1...Ke4
        • 2.Qf3#
      • 1...Be6
        • 2.Qg2#
        • 2.Qh1#
        • 2.Qd3#
        • 2.Qf3#
      • 1...Bh7!
    • 1.Bb3+?
      • 1...c4
        • 2.Qf5#
      • 1...Ke4!
    • 1.Qg4?
      • threat
        • 2.Bf3#
      • 1...c4
        • 2.Qf5#
      • 1...Bh7!
    • 1.Qb3+?
      • 1...Ke4
        • 2.Qf3#
      • 1...c4!
    • 1.Qf3+?
      • 1...Kc4
        • 2.Be2#
        • 2.Qb3#
      • 1...Ke6!
  • Keys
    • 1.Kd7!
      • threat
        • 2.Qd3#
      • 1...Be6+
        • 2.Qxe6#
      • 1...Kc4
        • 2.Qb3#
      • 1...Ke4
        • 2.Qf3#
      • 1...Bh7
        • 2.Qe6#
      • 1...c4
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::QAB1(B)
    • B(c);SBLOCK::QAR2(B)
    • P(a);SBLOCK::QAR2(B)
  • Tries
    • Try
      • B(A);
      • Threat
        • QAR2(B)
      • Vars
        • K(b);S_FLIGHT::QAB1(B)
      • Refutation
        • B(c);
    • Try
      • B(A);CHECK
      • Vars
        • P(a);P_SPINP(a)::QAR2(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);
      • Threat
        • B(A)
      • Vars
        • P(a);SBLOCK::QAR2(B)
      • Refutation
        • B(c);
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(B)
      • Refutation
        • P(a);P_SPINP(a)
    • Try
      • Q(B);CHECK
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • K(D);P-FLIGHT
    • Threat
      • QAR2(B)
    • Vars
      • B(c);CHECK,N_GUARD::QAB1(B),XB(c)
      • K(b);S_FLIGHT::QAB1(B)
      • B(c);N_GUARD::QAB1(B)
      • P(a);SBLOCK::QAR2(B)
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