MESON Chess Problem Database

Problem Display
PID: 7376 (6K1/2Qp4/4kp2/8/1N3R2/8/8/8 w - - 0 1)

Lincoln, Robert A

7th Comm., StrateGems, 1999

6K1/2Qp4/4kp2/8/1N3R2/8/8/8

#2

4 + 3

2786 More Fun with Chess Miniatures 2000
145 StrateGems 2000
5454 Near Snap 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Ke7
      • 2.Re4#
  • Tries
    • 1.Kf8?
      • 1...d6
        • 2.Qe7#
      • 1...d5
        • 2.Qe7#
      • 1...f5!
    • 1.Qb6+?
      • 1...Ke5
        • 2.Qxf6#
      • 1...Ke7
        • 2.Re4#
      • 1...d6!
    • 1.Qxd7+?
      • 1...Ke5
        • 2.Sd3#
      • 1...Kxd7!
  • Keys
    • 1.Sd3!
      • 1...Kd5
        • 2.Qxd7#
      • 1...Ke7
        • 2.Re4#
      • 1...f5
        • 2.Qe5#
      • 1...d5
        • 2.Sc5#
      • 1...d6
        • 2.Qf7#

This anticipates 152805(2011)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT,P_SPINP(c)::R(B)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Vars
        • P(c);OGATE::QAR1(C)
      • Refutation
        • P(b);
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAB1(C),XP(b)
        • K(a);P-FLIGHT::R(B)
      • Refutation
        • P(c);P_SPINP(c)
    • Try
      • Q(C);CHECK,XP(c)
      • Vars
        • K(a);P-FLIGHT::S(A)
      • Refutation
        • K(a);S_FLIGHT,XQ(C)
  • Actual
    • S(A);
    • Vars
      • K(a);S_FLIGHT::QAR2(C),XP(c)
      • K(a);P-FLIGHT,P_SPINP(c)::R(B)
      • P(b);N_GUARD::QAR1(C)
      • P(c);SBLOCK::S(A)
      • P(c);OGATE,SBLOCK::QAB1(C)
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