MESON Chess Problem Database

Problem Display
PID: 241015 (8/8/8/4Q3/8/1N2B2K/4kP2/1B6 w - - 0 1)

Lincoln, Robert A

Variantim, 2013

8/8/8/4Q3/8/1N2B2K/4kP2/1B6

#2

6 + 1

SOLUTION

  • SOUND
  • Sets
    • 1...Kf3
      • 2.Sd4#
      • 2.Qh5#
  • Tries
    • 1.Bd3+?
      • 1...Kd1
        • 2.Qa1#
      • 1...Ke1
        • 2.Qa1#
      • 1...Kf3
        • 2.Sd2#
        • 2.Sd4#
        • 2.Qg3#
        • 2.Qf4#
        • 2.Qf6#
        • 2.Qe4#
        • 2.Qd5#
        • 2.Qf5#
        • 2.Qh5#
      • 1...Kxd3!
    • 1.Bd2+?
      • 1...Kd1
        • 2.Qe1#
        • 2.Qh5#
      • 1...Kf1
        • 2.Qe1#
      • 1...Kf3
        • 2.Qe3#
      • 1...Kxf2!
    • 1.Qc3?
      • 1...Kd1
        • 2.Qd2#
      • 1...Kf3
        • 2.Sd4#
      • 1...Kf1!
    • 1.Qd4?
      • 1...Kf1
        • 2.Qd1#
      • 1...Kf3
        • 2.Qd1#
        • 2.Qg4#
      • 1...Ke1!
    • 1.Qd6?
      • 1...Kf1
        • 2.Qd1#
      • 1...Kf3
        • 2.Sd4#
        • 2.Qd1#
      • 1...Ke1!
    • 1.Qa5?
      • 1...Kd1
        • 2.Qd2#
      • 1...Kf3
        • 2.Sd4#
        • 2.Qh5#
      • 1...Kf1!
    • 1.Qb5+?
      • 1...Kd1
        • 2.Qf1#
      • 1...Kf3
        • 2.Sd2#
        • 2.Sd4#
        • 2.Qh5#
      • 1...Ke1!
    • 1.Qd5?
      • 1...Kf1
        • 2.Qd1#
      • 1...Ke1!
    • 1.Qh5+?
      • 1...Kf1
        • 2.Qd1#
      • 1...Ke1!
  • Keys
    • 1.Qa1!
      • 1...Kd1
        • 2.Bd3#
      • 1...Ke1
        • 2.Bd3#
      • 1...Kf1
        • 2.Bd3#
      • 1...Kf3
        • 2.Sd4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(A);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR(F)
        • K(a);P-FLIGHT::QAR(F)
      • Refutation
        • K(a);S_FLIGHT,XB(A)
    • Try
      • B(D);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(F)
        • K(a);S_FLIGHT::QAR1(F)
      • Refutation
        • K(a);P-FLIGHT,XP(B)
    • Try
      • Q(F);
      • Vars
        • K(a);S_FLIGHT::QAR1(F)
        • K(a);S_FLIGHT::S(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);
      • Vars
        • K(a);S_FLIGHT::QAR2(F)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(F);
      • Vars
        • K(a);S_FLIGHT::QAR2(F)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(F);
      • Vars
        • K(a);S_FLIGHT::QAR1(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR2(F)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(F);
      • Vars
        • K(a);S_FLIGHT::QAR2(F)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR2(F)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(F);
    • Vars
      • K(a);S_FLIGHT::QAR(F)+B(A)
      • K(a);P-FLIGHT::QAR(F)+B(A)
      • K(a);S_FLIGHT::QAR(F)+B(A),DCHECK
      • K(a);S_FLIGHT::S(C)
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