MESON Chess Problem Database

Problem Display
PID: 93116 (4b3/3PkpP1/7P/BQpr1p2/2Kp1N2/3P4/8/8 w - - 0 1)

Zalkind, Lazar Borissovich

Tidskrift for Schack, 1915

4b3/3PkpP1/7P/BQpr1p2/2Kp1N2/3P4/8/8

#2

8 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.d8Q#
  • Tries
    • 1.Kxd5?
      • threat
        • 2.d8Q#
        • 2.d8B#
      • 1...Kf6
        • 2.Bd8#
        • 2.d8Q#
        • 2.d8B#
      • 1...c4
        • 2.d8Q#
        • 2.d8B#
      • 1...f6
        • 2.dxe8Q#
      • 1...Bxd7!
    • 1.dxe8Q+?
      • 1...Kd6
        • 2.Qa6#
        • 2.Qbc6#
        • 2.Qbd7#
        • 2.Qb6#
        • 2.Qbb8#
      • 1...Kf6!
    • 1.d8B+?
      • 1...Kd6
        • 2.Bac7#
      • 1...Rxd8!
    • 1.g8S+?
      • 1...Kf8
        • 2.dxe8Q#
        • 2.dxe8R#
      • 1...Kd6!
  • Keys
    • 1.Qb8!
      • 1...Kf6
        • 2.Bd8#
      • 1...Kxd7
        • 2.Qc7#
      • 1...Rxd7
        • 2.Qe5#
      • 1...Bxd7
        • 2.g8S#
      • 1...Re5
        • 2.d8Q#
      • 1...Rd6
        • 2.Qd8#
      • 1...f6
        • 2.dxe8Q#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • R(c);N_GUARD::P=Q
  • Tries
    • Try
      • K(B);S_FLIGHT,XR(c)
      • Threat
        • P=Q
      • Vars
        • P(b);::P=Q
        • P(f);SBLOCK::PXB(g)=Q
      • Refutation
        • B(g);XP(G)
    • Try
      • P(G);CHECK,XB(g)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • P(G);CHECK
      • Vars
        • K(e);S_FLIGHT::B(D)
      • Refutation
        • R(c);XB(G)
    • Try
      • P(H);CHECK
      • Vars
        • K(e);S_FLIGHT::PXB(g)=Q
      • Refutation
        • K(e);S_FLIGHT
  • Actual
    • Q(E);
    • Vars
      • K(e);S_FLIGHT::B(D)
      • K(e);OGATEB,P-FLIGHT,XP(G)::QAR1(E)
      • R(c);N_GUARD,SBLOCK,XP(G)::QAR2(E)
      • B(g);SBLOCK,XP(G)::P=S
      • R(c);N_GUARD::P=Q
      • R(c);SBLOCK::QAB1(E)
      • P(f);SBLOCK::PXB(g)=Q
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