MESON Chess Problem Database

Problem Display
PID: 213418 (kq6/b2P4/2KB4/3B4/8/8/8/8 w - - 0 1)

Ernst, Erich

Badische Neueste Nachrichten, 1991

kq6/b2P4/2KB4/3B4/8/8/8/8

#2

4 + 3

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qc7+
      • 2.Kxc7#
    • 1...Qb5+
      • 2.Kxb5#
    • 1...Qd8
      • 2.Kb5#
    • 1...Qe8
      • 2.Kb5#
      • 2.Kc7#
    • 1...Qf8
      • 2.Kb5#
      • 2.Kc7#
    • 1...Qh8
      • 2.Kb5#
      • 2.Kc7#
  • Tries
    • 1.Bxb8?
      • threat
        • 2.Kc7#
      • 1...Kxb8
        • 2.d8Q#
        • 2.d8R#
      • 1...Bxb8
        • 2.Kb6#
      • 1...Bb6!
  • Keys
    • 1.d8Q!
      • threat
        • 2.Kd7#
      • 1...Qc8+
        • 2.Kb5#
      • 1...Qxd8
        • 2.Kb5#
      • 1...Bg1
        • 2.Qxb8#
      • 1...Bf2
        • 2.Qxb8#
      • 1...Be3
        • 2.Qxb8#
      • 1...Bd4
        • 2.Qxb8#
      • 1...Bc5
        • 2.Qxb8#
      • 1...Bb6
        • 2.Qxb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 2
  • Sets
    • Q(c);CHECK::B(A)+K(B),XQ(c)
    • Q(c);::B(A)+K(B)
  • Tries
    • Try
      • B(C);XQ(c)
      • Threat
        • B(A)+K(B)
      • Vars
        • K(b);P-FLIGHT,XB(C)::P=Q
        • B(a);SBLOCK,XB(C)::B(A)+K(B)
      • Refutation
        • B(a);
  • Actual
    • P(D);P_PINQ(c)
    • Threat
      • B(A)+K(B)
    • Vars
      • Q(c);CHECK::B(A)+K(B)
      • Q(c);N_SPINQ(c),XQ(D)::B(A)+K(B)
      • B(a);N_GUARD::QAR1(D),XQ(c)
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