MESON Chess Problem Database

Problem Display
PID: 230979 (K2R4/1p6/k7/P1Q5/8/1q6/8/8 w - - 0 1)

Lincoln, Robert A

Kudesnik, 2001

K2R4/1p6/k7/P1Q5/8/1q6/8/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qd1
      • 2.Qb6#
    • 1...Qa2
      • 2.Qb6#
    • 1...Qc2
      • 2.Qb6#
    • 1...Qa4
      • 2.Qb6#
    • 1...Qc4
      • 2.Qb6#
    • 1...Qd5
      • 2.Qb6#
    • 1...Qf7
      • 2.Qb6#
    • 1...Qg8
      • 2.Qb6#
    • 1...Qa3
      • 2.Qb6#
    • 1...Qc3
      • 2.Qb6#
    • 1...Qd3
      • 2.Qb6#
    • 1...Qf3
      • 2.Qb6#
    • 1...Qg3
      • 2.Qb6#
    • 1...Qh3
      • 2.Qb6#
    • 1...Qb5
      • 2.Qa7#
    • 1...Qb6
      • 2.Qxb6#
    • 1...b5
      • 2.Qb6#
      • 2.Qa7#
  • Tries
    • 1.Rd6+?
      • 1...Qb6
        • 2.Rxb6#
        • 2.Qxb6#
      • 1...b6!
  • Keys
    • 1.Rd5!
      • threat
        • 2.Qa7#
      • 1...Qxd5
        • 2.Qb6#
      • 1...Qe3
        • 2.Qb5#
      • 1...Qb6
        • 2.Qxb6#
      • 1...b6
        • 2.Qc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 14
  • Sets
    • Q(a);N_GUARD::QAR1(B)
    • Q(a);N_GUARD,P_PINR(D)::QAR1(B)
    • Q(a);SBLOCK::QAR1(B)
    • Q(a);N_GUARD::QAR1(B),XQ(a)
  • Tries
    • Try
      • R(D);CHECK
      • Refutation
        • P(c);P_SPINP(c)
  • Actual
    • R(D);
    • Threat
      • QAR1(B)
    • Vars
      • Q(a);N_GUARD,XR(D)::QAR1(B)
      • Q(a);N_GUARD::QAB1(B)
      • Q(a);N_GUARD::QAR1(B),XQ(a)
      • P(c);OGATEB::QAB(B)
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