MESON Chess Problem Database

Problem Display
PID: 120986 (6KQ/4p3/4pN2/N3kbR1/1P6/B5R1/3P2B1/8 w - - 0 1)

Spirin, E

5th Comm., Loshinski MT (64), 1982

6KQ/4p3/4pN2/N3kbR1/1P6/B5R1/3P2B1/8

#2

10 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Bb2#
    • 1...Kf4
      • 2.Sh5#
  • Tries
    • 1.Kf7?
      • 1...Kd4
        • 2.Bb2#
      • 1...Kf4
        • 2.Sh5#
      • 1...Kd6
        • 2.Qb8#
      • 1...exf6!
    • 1.Sc4+?
      • 1...Kf4
        • 2.Sh5#
      • 1...Kd4!
    • 1.Sc6+?
      • 1...Kf4
        • 2.Sh5#
      • 1...Kd6!
    • 1.Se4+?
      • 1...Kd5
        • 2.Rd3#
      • 1...Kf4!
    • 1.Sd7+?
      • 1...Kf4
        • 2.Qe5#
      • 1...Kd6!
    • 1.Bc6?
      • 1...Kd4
        • 2.Bb2#
      • 1...Kf4
        • 2.Sh5#
      • 1...Kd6
        • 2.Se8#
      • 1...exf6!
    • 1.Bb2+?
      • 1...Kf4
        • 2.Sh5#
      • 1...Kd6!
    • 1.Rd3?
      • threat
        • 2.Sh5#
      • 1...exf6
        • 2.Qh2#
      • 1...Kf4!
    • 1.R3g4?
      • threat
        • 2.Sc4#
        • 2.Se8#
      • 1...exf6
        • 2.Sc4#
        • 2.Qh2#
      • 1...Kd6!
    • 1.Qh4?
      • 1...Kxf6
        • 2.Qh8#
      • 1...exf6
        • 2.Sc4#
      • 1...Kd6!
    • 1.d4+?
      • 1...Kxd4
        • 2.Bb2#
      • 1...Kf4
        • 2.Sh5#
        • 2.Bc1#
      • 1...Kd6!
  • Keys
    • 1.Qh2!
      • 1...Kd4
        • 2.Bb2#
      • 1...Kf4
        • 2.R3g4#
      • 1...Kd6
        • 2.Rd3#
      • 1...Kxf6
        • 2.Qh8#
      • 1...exf6
        • 2.Rd3#
        • 2.R3g4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);N_SPINB(b),S_FLIGHT::B(C)
    • K(a);N_SPINB(b),S_FLIGHT::S(H)
  • Tries
    • Try
      • K(I);S_FLIGHT
      • Vars
        • K(a);N_SPINB(b),S_FLIGHT::B(C)
        • K(a);N_SPINB(b),S_FLIGHT::S(H)
        • K(a);N_SPINB(b),S_FLIGHT::QAB(J)
      • Refutation
        • P(d);P_SPINP(d),XS(H)
    • Try
      • S(F);CHECK
      • Vars
        • K(a);N_SPINB(b),S_FLIGHT::S(H)
      • Refutation
        • K(a);N_SPINB(b),S_FLIGHT
    • Try
      • S(F);CHECK
      • Vars
        • K(a);N_SPINB(b),S_FLIGHT::S(H)
      • Refutation
        • K(a);N_SPINB(b),S_FLIGHT
    • Try
      • S(H);CHECK
      • Vars
        • K(a);P-FLIGHT::R(D)
      • Refutation
        • K(a);N_SPINB(b),S_FLIGHT
    • Try
      • S(H);CHECK
      • Vars
        • K(a);N_SPINB(b),S_FLIGHT::QAB1(J)
      • Refutation
        • K(a);N_SPINB(b),S_FLIGHT
    • Try
      • B(B);
      • Vars
        • K(a);N_SPINB(b),S_FLIGHT::B(C)
        • K(a);N_SPINB(b),S_FLIGHT::S(H)
      • Refutation
        • P(d);P_SPINP(d),XS(H)
    • Try
      • B(C);CHECK
      • Vars
        • K(a);N_SPINB(b),S_FLIGHT::S(H)
      • Refutation
        • K(a);N_SPINB(b),S_FLIGHT
    • Try
      • R(D);
      • Threat
        • QAB(J)+S(H)
      • Vars
        • P(d);P_SPINP(d),SBLOCK,XS(H)::QAB(J)
      • Refutation
        • K(a);N_SPINB(b),S_FLIGHT
    • Try
      • R(D);
      • Threat
        • DUALS(2)
      • Refutation
        • K(a);N_SPINB(b),S_FLIGHT
    • Try
      • Q(J);
      • Vars
        • K(a);N_SPINB(b),OGATEB,S_FLIGHT,XS(H)::QAB(J)
        • P(d);SBLOCK,XS(H)::S(F)
      • Refutation
        • K(a);N_SPINB(b),S_FLIGHT
    • Try
      • P(A);CHECK
      • Vars
        • K(a);N_SPINB(b),S_FLIGHT,XP(A)::B(C)
      • Refutation
        • K(a);N_SPINB(b),S_FLIGHT
  • Actual
    • Q(J);
    • Vars
      • K(a);N_SPINB(b),S_FLIGHT::B(C)
      • K(a);N_SPINB(b),S_FLIGHT::QAB(J)+R(D),DCHECK
      • K(a);N_SPINB(b),OGATEB,S_FLIGHT,XS(H)::QAB(J)
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