MESON Chess Problem Database

Problem Display
PID: 153212 (8/8/8/6p1/Q7/5kNR/3K4/7b w - - 0 1)

Lincoln, Robert A

StrateGems, 2011

8/8/8/6p1/Q7/5kNR/3K4/7b

#2

4 + 3

5454 Near Snap 2017

SOLUTION

  • SOUND
  • Tries
    • 1.Ke1?
      • threat
        • 2.Qe4#
      • 1...Ke3
        • 2.Sf1#
        • 2.Sxh1#
        • 2.Sf5#
      • 1...Kg2!
    • 1.Qd1+?
      • 1...Kf2
        • 2.Qf1#
      • 1...Kg2
        • 2.Qf1#
      • 1...Kf4!
    • 1.Qc4?
      • 1...Kf2
        • 2.Qf1#
      • 1...Kg2
        • 2.Qf1#
      • 1...g4
        • 2.Qf1#
      • 1...Bg2!
  • Keys
    • 1.Qb5!
      • 1...Kf2
        • 2.Qf1#
      • 1...Kg2
        • 2.Qf1#
      • 1...Kf4
        • 2.Qf5#
      • 1...Kg4
        • 2.Qf5#
      • 1...Bg2
        • 2.Qf5#
      • 1...g4
        • 2.Qf1#

Anticipated by 60766(1927)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Threat
        • QAB1(D)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(D)
        • K(b);S_FLIGHT::QAB1(D)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(D);
      • Vars
        • K(b);P-FLIGHT::QAR1(D)
        • K(b);S_FLIGHT::QAB1(D)
        • P(c);SBLOCK::QAR2(D)
      • Refutation
        • B(a);
  • Actual
    • Q(D);
    • Vars
      • K(b);P-FLIGHT::QAR1(D)
      • K(b);S_FLIGHT::QAB1(D)
      • B(a);SBLOCK::QAR2(D)
      • P(c);SBLOCK::QAR2(D)
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