MESON Chess Problem Database

Problem Display
PID: 171272 (3K4/8/P1PB1P2/1N1kNbQ1/3P4/1R1R4/8/8 w - - 0 1)

Archakov, Vladimir Mikhailovich

Mikhailov, Ivan Mikhailovich

Bulletin of the Central Chess Club of USSR, 1971

3K4/8/P1PB1P2/1N1kNbQ1/3P4/1R1R4/8/8

#2

11 + 2

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Sc3#
    • 1...Ke6
      • 2.d5#
    • 1...Be4
      • 2.Qg8#
    • 1...Be6
      • 2.Qg2#
  • Tries
    • 1.Ke7?
      • threat
        • 2.Sc3#
      • 1...Ke4
        • 2.Sc3#
      • 1...Bxd3!
    • 1.Sc7+?
      • 1...Ke4
        • 2.Qe3#
      • 1...Kxd6!
    • 1.Qg2+?
      • 1...Be4
        • 2.Qg8#
      • 1...Ke6!
    • 1.Qg8+?
      • 1...Be6
        • 2.Qg2#
      • 1...Ke4!
  • Keys
    • 1.Sd7!
      • 1...Kc4
        • 2.Sb6#
      • 1...Ke4
        • 2.Qg2#
      • 1...Kxc6
        • 2.d5#
      • 1...Ke6
        • 2.Qg8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • K(a);S_FLIGHT::S(D)
    • K(a);OGATE,S_FLIGHT::P(C)
    • B(b);N_GUARD,SBLOCK::QAB(F)
  • Tries
    • Try
      • K(K);S_FLIGHT
      • Threat
        • S(D)
      • Vars
        • K(a);S_FLIGHT::S(D)
      • Refutation
        • B(b);XR(B)
    • Try
      • S(D);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(F)
      • Refutation
        • K(a);P-FLIGHT,XB(I)
    • Try
      • Q(F);CHECK
      • Vars
        • B(b);N_GUARD,P_SPINB(b),SBLOCK::QAB(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • B(b);N_GUARD,P_SPINB(b),SBLOCK::QAB(F)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(E);P_PINB(b)
    • Vars
      • K(a);N_SPINB(b),S_FLIGHT::S(E)
      • K(a);N_SPINB(b),S_FLIGHT::QAB(F)
      • K(a);N_SPINB(b),OGATE,S_FLIGHT,XP(H)::P(C)
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