MESON Chess Problem Database

Problem Display
PID: 153141 (8/4K3/8/6p1/2kp2Q1/2N5/1R6/8 w - - 0 1)

Lincoln, Robert A

3rd HM., Problemist Ukraini, 2010

8/4K3/8/6p1/2kp2Q1/2N5/1R6/8

#2

4 + 3

145 StrateGems 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Qc8#
  • Tries
    • 1.Se4?
      • 1...Kd3
        • 2.Qe2#
      • 1...Kd5
        • 2.Qe6#
      • 1...d3!
    • 1.Rb3?
      • 1...Kd3
        • 2.Qe2#
      • 1...Kc5
        • 2.Qc8#
      • 1...Kxb3!
    • 1.Qe2+?
      • 1...Kxc3
        • 2.Qc2#
      • 1...Kc5
        • 2.Qb5#
      • 1...d3!
    • 1.Qe6+?
      • 1...Kxc3
        • 2.Qb3#
      • 1...Kc5
        • 2.Sa4#
        • 2.Se4#
        • 2.Rb5#
        • 2.Qd5#
        • 2.Qc8#
      • 1...Kd3!
    • 1.Qe4?
      • 1...Kxc3
        • 2.Qc2#
      • 1...Kc5
        • 2.Qd5#
      • 1...g4!
  • Keys
    • 1.Sa4!
      • 1...Kd3
        • 2.Qe2#
      • 1...Kd5
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(a);N_SPINP(b),P-FLIGHT::QAR(C)
  • Tries
    • Try
      • S(B);N_PINP(b)
      • Vars
        • K(a);S_FLIGHT::QAB1(C)
      • Refutation
        • P(b);
    • Try
      • R(A);
      • Vars
        • K(a);N_SPINP(b),S_FLIGHT::QAB1(C)
        • K(a);N_SPINP(b),P-FLIGHT::QAR(C)
      • Refutation
        • K(a);N_SPINP(b),S_FLIGHT,XR(A)
    • Try
      • Q(C);CHECK,N_PINP(b)
      • Vars
        • K(a);OGATEB,P-FLIGHT,XS(B)::QAR1(C)
        • K(a);OGATE,P-FLIGHT::QAR1(C)
      • Refutation
        • P(b);P_SPINP(b)
    • Try
      • Q(C);CHECK,N_PINP(b)
      • Vars
        • K(a);OGATE,P-FLIGHT,XS(B)::QAR1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);N_SPINP(b),OGATEB,P-FLIGHT,XS(B)::QAR1(C)
        • K(a);N_SPINP(b),P-FLIGHT::QAR1(C)
      • Refutation
        • P(c);
  • Actual
    • S(B);
    • Vars
      • K(a);N_SPINP(b),S_FLIGHT::QAB1(C)
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