MESON Chess Problem Database

Problem Display
PID: 179807 (Q7/8/8/8/8/8/BqRN2Pp/k1b4K w - - 0 1)

Zalkind, Lazar Borissovich

La Strategie, 1912

Q7/8/8/8/8/8/BqRN2Pp/k1b4K

#2

6 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4
      • 2.Sb3#
    • 1...Qe5
      • 2.Sb3#
    • 1...Qf6
      • 2.Sb3#
    • 1...Qg7
      • 2.Sb3#
    • 1...Qh8
      • 2.Sb3#
    • 1...Qxa2
      • 2.Rxa2#
      • 2.Qxa2#
    • 1...Qb3
      • 2.Sxb3#
  • Tries
    • 1.Bb1+?
      • 1...Qa2
        • 2.Rxa2#
        • 2.Qxa2#
      • 1...Qa3!
    • 1.Bb3+?
      • 1...Qa2
        • 2.Rxa2#
        • 2.Qxa2#
      • 1...Qa3!
    • 1.Bc4+?
      • 1...Qa2
        • 2.Rxa2#
        • 2.Qxa2#
      • 1...Qa3!
    • 1.Bd5+?
      • 1...Qa2
        • 2.Rxa2#
        • 2.Qxa2#
      • 1...Qa3!
    • 1.Be6+?
      • 1...Qa2
        • 2.Rxa2#
        • 2.Qxa2#
      • 1...Qa3!
    • 1.Bf7+?
      • 1...Qa2
        • 2.Rxa2#
        • 2.Qxa2#
      • 1...Qa3!
    • 1.Bg8+?
      • 1...Qa2
        • 2.Rxa2#
        • 2.Qxa2#
      • 1...Qa3!
    • 1.Rxc1+?
      • 1...Qb1
        • 2.Rxb1#
      • 1...Qxc1+!
    • 1.Rxb2?
      • threat
        • 2.Rb1#
      • 1...Bxb2
        • 2.Sb3#
      • 1...Kxb2!
  • Keys
    • 1.Qh8!
      • 1...Kxa2
        • 2.Qa8#
      • 1...Qxh8
        • 2.Sb3#
      • 1...Bxd2
        • 2.Qxb2#
      • 1...Qc3
        • 2.Sb3#
      • 1...Qd4
        • 2.Sb3#
      • 1...Qe5
        • 2.Sb3#
      • 1...Qf6
        • 2.Sb3#
      • 1...Qg7
        • 2.Sb3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • Q(c);N_GUARD::S(D)
    • Q(c);N_GUARD::S(D),XQ(c)
  • Tries
    • Try
      • B(B);CHECK
      • Refutation
        • Q(c);P_SPINQ(c)
    • Try
      • B(B);CHECK
      • Refutation
        • Q(c);P_SPINQ(c)
    • Try
      • B(B);CHECK
      • Refutation
        • Q(c);P_SPINQ(c)
    • Try
      • B(B);CHECK
      • Refutation
        • Q(c);P_SPINQ(c)
    • Try
      • B(B);CHECK
      • Refutation
        • Q(c);P_SPINQ(c)
    • Try
      • B(B);CHECK
      • Refutation
        • Q(c);P_SPINQ(c)
    • Try
      • B(B);CHECK
      • Refutation
        • Q(c);P_SPINQ(c)
    • Try
      • R(C);CHECK,XB(b)
      • Vars
        • Q(c);N_GUARD,P_PINR(C),P_SPINQ(c)::R1(C),XQ(c)
      • Refutation
        • Q(c);CHECK,XR(C)
    • Try
      • R(C);XQ(c)
      • Threat
        • R1(C)
      • Vars
        • B(b);SBLOCK,XR(C)::S(D)
      • Refutation
        • K(a);S_FLIGHT,XR(C)
  • Actual
    • Q(F);P_PINQ(c)
    • Vars
      • K(a);OGATEB,P-FLIGHT,XB(B)::QAR(F)
      • Q(c);N_SPINQ(c),XQ(F)::S(D)
      • B(b);N_GUARD,XS(D)::QAB1(F),XQ(c)
      • Q(c);::S(D)
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