MESON Chess Problem Database

Problem Display
PID: 67768 (1K1b4/1p6/k7/3N4/8/1Q2N3/8/8 w - - 0 1)

Lincoln, Robert A

StrateGems, 2006

1K1b4/1p6/k7/3N4/8/1Q2N3/8/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Bh4
      • 2.Qa4#
      • 2.Qb6#
    • 1...Ba5
      • 2.Qxb7#
    • 1...Bg5
      • 2.Qa4#
      • 2.Qb6#
    • 1...Bb6
      • 2.Qxb6#
    • 1...Bf6
      • 2.Qa4#
      • 2.Qb6#
    • 1...Be7
      • 2.Qa4#
      • 2.Qb6#
    • 1...b6
      • 2.Qa4#
  • Tries
    • 1.Sc3?
      • threat
        • 2.Qb5#
      • 1...Ka5
        • 2.Qb5#
      • 1...b5
        • 2.Qxb5#
      • 1...Bc7+!
    • 1.Sc7+?
      • 1...Ka5
        • 2.Sc4#
        • 2.Qb5#
      • 1...Bxc7+!
    • 1.Qb4?
      • 1...Bc7+
        • 2.Sxc7#
      • 1...Ba5
        • 2.Qxb7#
      • 1...Bh4
        • 2.Sc7#
        • 2.Qa4#
        • 2.Qb6#
      • 1...Bg5
        • 2.Sc7#
        • 2.Qa4#
        • 2.Qb6#
      • 1...Bb6
        • 2.Qxb6#
      • 1...Bf6
        • 2.Sc7#
        • 2.Qa4#
        • 2.Qb6#
      • 1...Be7
        • 2.Sc7#
        • 2.Qa4#
        • 2.Qb6#
      • 1...b6
        • 2.Qa4#
      • 1...b5!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Qxb7#
      • 1...Bc7+
        • 2.Sxc7#
      • 1...Bb6
        • 2.Qxb6#
      • 1...b5
        • 2.Sb4#
      • 1...b6
        • 2.Qa4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • B(c);SBLOCK::QAB1(A),XP(b)
    • B(c);N_GUARD::QAR1(A),XB(c)
    • P(b);S_CUTB(c)::QAR2(A)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAB1(A)
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
        • P(b);::QAB1(A),XP(b)
      • Refutation
        • B(c);CHECK
    • Try
      • S(C);CHECK
      • Refutation
        • B(c);CHECK,XS(C)
    • Try
      • Q(A);
      • Vars
        • B(c);CHECK,N_GUARD::S(C),XB(c)
        • B(c);SBLOCK::QAB1(A),XP(b)
        • B(c);N_GUARD::QAR1(A),XB(c)
        • P(b);S_CUTB(c)::QAR2(A)
      • Refutation
        • P(b);
  • Actual
    • S(B);
    • Threat
      • QAB1(A),XP(b)
    • Vars
      • B(c);CHECK,N_GUARD::S(C),XB(c)
      • B(c);N_GUARD::QAR1(A),XB(c)
      • P(b);SBLOCK::S(C)
      • P(b);S_CUTB(c)::QAR2(A)
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