MESON Chess Problem Database

Problem Display
PID: 39234 (8/1r6/K2b4/8/k7/2QP4/1P6/8 w - - 0 1)

Lincoln, Robert A

More Fun with Chess Miniatures, 2000

8/1r6/K2b4/8/k7/2QP4/1P6/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Rb3
      • 2.Qa5#
    • 1...Rb4
      • 2.Qa3#
    • 1...Bh2
      • 2.Qa3#
    • 1...Ba3
      • 2.Qxa3#
    • 1...Bg3
      • 2.Qa3#
    • 1...Bb4
      • 2.Qc2#
    • 1...Bf4
      • 2.Qa3#
    • 1...Be5
      • 2.Qa3#
    • 1...Bc7
      • 2.Qa3#
    • 1...Bb8
      • 2.Qa3#
  • Tries
    • 1.Qc2+?
      • 1...Kb4
        • 2.Qc4#
      • 1...Rb3!
    • 1.Qc6+?
      • 1...Kb4
        • 2.Qc4#
      • 1...Rb5
        • 2.Qxb5#
      • 1...Kb3!
    • 1.b3+?
      • 1...Rxb3
        • 2.Qa5#
      • 1...Ka3!
  • Keys
    • 1.Qc4+!
      • 1...Rb4
        • 2.Qa2#
      • 1...Bb4
        • 2.Qc2#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 8
  • Sets
    • R(c);SBLOCK::QAR1(B)
    • R(c);S_CUTB(b)::QAR1(B)
    • B(b);N_GUARD,SBLOCK::QAR1(B)
    • B(b);N_GUARD::QAR1(B),XB(b)
    • B(b);N_GUARD::QAR1(B)
    • B(b);SBLOCK,S_CUTR(c)::QAB(B)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
      • Refutation
        • R(c);P_SPINR(c)
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
        • R(c);N_GUARD,P_SPINR(c)::QAB1(B),XR(c)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • P(A);CHECK
      • Vars
        • R(c);SBLOCK,XP(A)::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(B);CHECK
    • Vars
      • R(c);P_SPINR(c),SBLOCK,S_CUTB(b)::QAR2(B)
      • B(b);P_SPINB(b),SBLOCK,S_CUTR(c)::QAB(B)
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