MESON Chess Problem Database

Problem Display
PID: 138816 (R7/bk1N4/1p6/3K4/8/8/3Q4/8 w - - 0 1)

Lincoln, Robert A

StrateGems, 2010

R7/bk1N4/1p6/3K4/8/8/3Q4/8

#2

4 + 3

SOLUTION

  • SOUND
  • Tries
    • 1.Qc1?
      • threat
        • 2.Qc8#
      • 1...Kxa8
        • 2.Qc6#
      • 1...Bb8
        • 2.Qc6#
      • 1...Ka6!
    • 1.Qc3?
      • threat
        • 2.Qc8#
      • 1...Kxa8
        • 2.Qc6#
      • 1...Bb8
        • 2.Qc6#
      • 1...Ka6!
    • 1.Qc2?
      • threat
        • 2.Qc8#
      • 1...Kxa8
        • 2.Qc6#
      • 1...Bb8
        • 2.Qc6#
      • 1...Ka6!
  • Keys
    • 1.Qh6!
      • 1...Ka6
        • 2.Qxb6#
      • 1...Kc7
        • 2.Qc6#
      • 1...Kxa8
        • 2.Qc6#
      • 1...Bb8
        • 2.Qc6#
      • 1...b5
        • 2.Qc6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(c);S_FLIGHT,XR(D)::QAB(A)
        • B(b);::QAB1(A)
      • Refutation
        • K(c);P_SPINB(b),S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(c);S_FLIGHT,XR(D)::QAB(A)
        • B(b);::QAB1(A)
      • Refutation
        • K(c);P_SPINB(b),S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(c);S_FLIGHT,XR(D)::QAB(A)
        • B(b);::QAB1(A)
      • Refutation
        • K(c);P_SPINB(b),S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(c);P_SPINB(b),P_SPINP(a),S_FLIGHT::QAR1(A),XP(a)
      • K(c);P-FLIGHT::QAR1(A)
      • K(c);S_FLIGHT,XR(D)::QAB(A)
      • B(b);::QAB1(A)
      • P(a);::QAB1(A)
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