MESON Chess Problem Database

Problem Display
PID: 70083 (8/8/8/p3b3/k1K5/4Q3/3B4/n7 w - - 0 1)

Lincoln, Robert A

5th HM., Amirov MT, 2005

8/8/8/p3b3/k1K5/4Q3/3B4/n7

#2

3 + 4

145 StrateGems 2006

SOLUTION

  • SOUND
  • Sets
    • 1...Sc2
      • 2.Qb3#
    • 1...Sb3
      • 2.Qxb3#
  • Tries
    • 1.Bc1?
      • threat
        • 2.Qa3#
      • 1...Bc3
        • 2.Qe8#
      • 1...Bd6
        • 2.Qe8#
      • 1...Sc2
        • 2.Qb3#
      • 1...Sb3
        • 2.Qxb3#
      • 1...Bb2!
    • 1.Qc3?
      • threat
        • 2.Qxa5#
      • 1...Sb3
        • 2.Qxb3#
      • 1...Bc7
        • 2.Qxa1#
      • 1...Bxc3!
    • 1.Qxe5?
      • threat
        • 2.Qxa1#
        • 2.Qxa5#
      • 1...Ka3
        • 2.Qxa1#
      • 1...Sc2
        • 2.Qxa5#
      • 1...Sb3!
  • Keys
    • 1.Bb4!
      • threat
        • 2.Qa3#
      • 1...axb4
        • 2.Qa7#
      • 1...Bb2
        • 2.Qe8#
      • 1...Bc3
        • 2.Qe8#
      • 1...Sc2
        • 2.Qb3#
      • 1...Sb3
        • 2.Qxb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAB1(B)
    • S(a);N_GUARD::QAB1(B),XS(a)
  • Tries
    • Try
      • B(A);
      • Threat
        • QAR1(B)
      • Vars
        • B(d);OGATE::QAB(B)
        • S(a);N_GUARD::QAB1(B)
        • S(a);N_GUARD::QAB1(B),XS(a)
      • Refutation
        • B(d);
    • Try
      • Q(B);
      • Threat
        • QAR1(B),XP(c)
      • Vars
        • S(a);N_GUARD::QAB1(B),XS(a)
        • B(d);N_GUARD::QAR(B),XS(a)
      • Refutation
        • B(d);XQ(B)
    • Try
      • Q(B);XB(d)
      • Threat
        • DUALS(2)
      • Vars
        • K(b);P-FLIGHT::QAR2(B),XS(a)
        • S(a);::QAR1(B),XP(c)
      • Refutation
        • S(a);
  • Actual
    • B(A);
    • Threat
      • QAR1(B)
    • Vars
      • P(c);OGATEB,XB(A)::QAR(B)
      • B(d);OGATE::QAB(B)
      • S(a);N_GUARD::QAB1(B)
      • S(a);N_GUARD::QAB1(B),XS(a)
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