MESON Chess Problem Database

Problem Display
PID: 23056 (K2n4/1p6/k7/p2N4/Q7/8/8/8 w - - 0 1)

Lincoln, Robert A

Fun with Chess Miniatures, 1996

K2n4/1p6/k7/p2N4/Q7/8/8/8

#2

3 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...b6
      • 2.Sb4#
      • 2.Sc7#
  • Tries
    • 1.Sc3?
      • threat
        • 2.Qb5#
      • 1...b5
        • 2.Qxb5#
      • 1...Kb6!
    • 1.Qb3?
      • threat
        • 2.Sc7#
        • 2.Qb6#
      • 1...a4
        • 2.Qxa4#
        • 2.Qb6#
      • 1...Se6
        • 2.Qb6#
        • 2.Qxb7#
      • 1...b6
        • 2.Sc7#
        • 2.Qxb6#
      • 1...b5!
    • 1.Qd4?
      • threat
        • 2.Sc7#
        • 2.Qb6#
      • 1...a4
        • 2.Qb6#
        • 2.Qxa4#
      • 1...Se6
        • 2.Qb6#
      • 1...b6
        • 2.Sc7#
        • 2.Qxb6#
      • 1...Kb5!
  • Keys
    • 1.Qd7!
      • 1...Sc6
        • 2.Qxb7#
      • 1...a4
        • 2.Qxa4#
      • 1...Se6
        • 2.Qxb7#
      • 1...Sf7
        • 2.Qxb7#
      • 1...b5
        • 2.Qa7#
      • 1...b6
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);
      • Threat
        • QAB1(A)
      • Vars
        • P(c);::QAB1(A),XP(c)
      • Refutation
        • K(b);N_SPINP(a),P-FLIGHT
    • Try
      • Q(A);N_PINP(a)
      • Threat
        • DUALS(2)
      • Refutation
        • P(c);
    • Try
      • Q(A);N_PINP(a)
      • Threat
        • DUALS(2)
      • Vars
        • S(d);::QAR1(A)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(A);N_PINP(a)
    • Vars
      • S(d);N_GUARD::QAB1(A),XP(c)
      • P(a);OGATEB::QAR2(A),XP(a)
      • P(c);OGATE,SBLOCK::QAR1(A)
      • P(c);SBLOCK::S(B)
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