MESON Chess Problem Database

Problem Display
PID: 160197 (4Nb2/K7/1pk5/8/N7/3Q4/8/8 w - - 0 1)

Lincoln, Robert A

British Chess Magazine, 2004

4Nb2/K7/1pk5/8/N7/3Q4/8/8

#2

4 + 3

SOLUTION

  • SOUND
  • Tries
    • 1.Ka6?
      • threat
        • 2.Qb5#
      • 1...b5
        • 2.Qxb5#
      • 1...Bc5!
    • 1.Sc3?
      • threat
        • 2.Qb5#
        • 2.Qd5#
      • 1...Bd6
        • 2.Qb5#
        • 2.Qxd6#
      • 1...b5
        • 2.Qxb5#
        • 2.Qd5#
      • 1...Kc5!
    • 1.Sf6?
      • threat
        • 2.Qd7#
      • 1...Kc7
        • 2.Qd7#
      • 1...Bd6!
  • Keys
    • 1.Sxb6!
      • threat
        • 2.Qd5#
      • 1...Kc5
        • 2.Qc4#
      • 1...Bc5
        • 2.Qd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Threat
        • QAB1(A)
      • Vars
        • P(a);::QAB1(A),XP(a)
      • Refutation
        • B(c);
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • S(D);
      • Threat
        • QAB1(A)
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
      • Refutation
        • B(c);
  • Actual
    • S(B);XP(a)
    • Threat
      • QAB1(A)
    • Vars
      • K(b);P-FLIGHT::QAR1(A)
      • B(c);P_PINS(B),SBLOCK::QAB1(A)
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