MESON Chess Problem Database

Problem Display
PID: 67534 (b7/3p4/4kN2/2Q5/4N2R/B7/4R3/2K5 w - - 0 1)

Lindgren, Bo Waldemar

Sp. Prize, Arbejder-Skak, 1951-1952

b7/3p4/4kN2/2Q5/4N2R/B7/4R3/2K5

#2

7 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Bd5
      • 2.Qxd5#
  • Tries
    • 1.Rf4?
      • threat
        • 2.Sg5#
        • 2.Qe7#
      • 1...Bxe4
        • 2.Qe7#
        • 2.Qd5#
      • 1...d6
        • 2.Sg5#
      • 1...Kf7!
    • 1.Qf5+?
      • 1...Kf7
        • 2.Rh7#
      • 1...Kxf5!
  • Keys
    • 1.Rh6!
      • threat
        • 2.Sg5#
      • 1...Kf7
        • 2.Qe7#
      • 1...Bxe4
        • 2.Qd5#
      • 1...Bd5
        • 2.Qxd5#
      • 1...d5
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(c);N_GUARD::QAB1(F),XB(c)
  • Tries
    • Try
      • R(E);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::R(B)+S(D),DCHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(a);S_FLIGHT::R(E)
      • Refutation
        • K(a);S_FLIGHT,XQ(F)
  • Actual
    • R(E);
    • Threat
      • R(B)+S(D),DCHECK
    • Vars
      • K(a);S_FLIGHT::QAR1(F)
      • B(c);N_GUARD,P_SPINB(c),XS(D)::QAB1(F)
      • B(c);N_GUARD::QAB1(F),XB(c)
      • P(b);S_CUTB(c)::R(B)+S(D)
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