MESON Chess Problem Database

Problem Display
PID: 75216 (6B1/8/7b/8/6kr/3Q4/4KB2/8 w - - 0 1)

Lincoln, Robert A

2nd Prize, Magadan, 2005-2006

6B1/8/7b/8/6kr/3Q4/4KB2/8

#2

4 + 3

145 StrateGems 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Bg5
      • 2.Qf3#
  • Tries
    • 1.Be6+?
      • 1...Kf4
        • 2.Qf5#
        • 2.Qe3#
      • 1...Kg5
        • 2.Qf5#
      • 1...Kh5!
    • 1.Qg6+?
      • 1...Kh3
        • 2.Qg3#
      • 1...Kf4
        • 2.Bg3#
      • 1...Bg5!
    • 1.Qg3+?
      • 1...Kh5
        • 2.Bf7#
      • 1...Kf5!
  • Keys
    • 1.Bh7!
      • threat
        • 2.Qf5#
      • 1...Kf4
        • 2.Qf5#
        • 2.Qg3#
      • 1...Kg5
        • 2.Qf5#
      • 1...Kh5
        • 2.Qg6#
      • 1...Rh5
        • 2.Qg3#
      • 1...Bg5
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(c);SBLOCK::QAB1(C)
  • Tries
    • Try
      • B(D);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(C)
        • K(a);P-FLIGHT::B(B)
      • Refutation
        • B(c);P_SPINB(c)
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);S_FLIGHT::B(D)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • B(D);
    • Threat
      • QAB1(C)
    • Vars
      • K(a);P-FLIGHT::QAR1(C)
      • K(a);S_FLIGHT::QAB1(C)
      • R(b);SBLOCK::QAR1(C)
      • B(c);SBLOCK::QAB1(C)
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