MESON Chess Problem Database

Problem Display
PID: 138720 (8/8/8/8/7B/6nK/RQ2p3/5k2 w - - 0 1)

Lincoln, Robert A

StrateGems, 2010

8/8/8/8/7B/6nK/RQ2p3/5k2

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Ke1
      • 2.Qxe2#
    • 1...e1Q
      • 2.Qg2#
    • 1...e1S
      • 2.Qf2#
    • 1...e1B
      • 2.Qg2#
    • 1...e1R
      • 2.Qf2#
      • 2.Qg2#
  • Tries
    • 1.Bxg3?
      • 1...e1Q
        • 2.Qg2#
      • 1...e1S
        • 2.Qf2#
      • 1...e1B
        • 2.Qg2#
      • 1...e1R
        • 2.Qf2#
        • 2.Qg2#
      • 1...Kg1!
    • 1.Ra1+?
      • 1...e1Q
        • 2.Qg2#
      • 1...e1S
        • 2.Qg2#
      • 1...e1B
        • 2.Qg2#
      • 1...e1R
        • 2.Qg2#
      • 1...Kf2!
    • 1.Qxe2+?
      • 1...Kg1
        • 2.Qg2#
      • 1...Sxe2!
  • Keys
    • 1.Kh2!
      • 1...Ke1
        • 2.Qxe2#
      • 1...Kf2
        • 2.Qxe2#
      • 1...e1Q
        • 2.Qg2#
      • 1...e1S
        • 2.Qf2#
      • 1...e1B
        • 2.Qg2#
      • 1...e1R
        • 2.Qf2#
        • 2.Qg2#
      • 1...Sh1
        • 2.Qxe2#
      • 1...Se4
        • 2.Qxe2#
      • 1...Sf5
        • 2.Qxe2#
      • 1...Sh5
        • 2.Qxe2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT,P_SPINS(c)::QAR1(B),XP(b)
    • P(b);OGATE,SBLOCK::QAB1(B)
    • P(b);OGATE::QAR1(B)
  • Tries
    • Try
      • B(D);XS(c)
      • Vars
        • P(b);OGATE::QAB1(B)
        • P(b);OGATE::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(A);CHECK
      • Vars
        • P(b);OGATE,P_SPINQ(b)::QAB1(B)
        • P(b);OGATE,P_SPINS(b)::QAB1(B)
        • P(b);OGATE,P_SPINB(b)::QAB1(B)
        • P(b);OGATE,P_SPINR(b)::QAB1(B)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b),P_SPINS(c)
    • Try
      • Q(B);CHECK,XP(b)
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
      • Refutation
        • S(c);XQ(B)
  • Actual
    • K(C);P-FLIGHT
    • Vars
      • K(a);P-FLIGHT,P_SPINS(c)::QAR1(B),XP(b)
      • K(a);P-FLIGHT,P_SPINP(b),P_SPINS(c)::QAR1(B),XP(b)
      • P(b);OGATE,SBLOCK::QAB1(B)
      • P(b);OGATE::QAR1(B)
      • S(c);N_GUARD::QAB1(B),XP(b)
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