MESON Chess Problem Database

Problem Display
PID: 135575 (8/1R6/2N5/3kP3/8/3N4/6K1/4Q3 w - - 0 1)

Shumarin, Vladimir Pavlovich

Sp. HM., Lebedev JT, 2005

8/1R6/2N5/3kP3/8/3N4/6K1/4Q3

#2

6 + 1

145 StrateGems 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc6
      • 2.Qe4#
  • Tries
    • 1.Sdb4+?
      • 1...Kc5
        • 2.Qc3#
        • 2.Qc1#
      • 1...Ke6
        • 2.Sd4#
      • 1...Kc4!
    • 1.Sf4+?
      • 1...Kc4
        • 2.Qb4#
        • 2.Qc1#
      • 1...Kc5
        • 2.Qc3#
        • 2.Qc1#
      • 1...Kxc6!
    • 1.Sa5?
      • 1...Kd4
        • 2.Rd7#
      • 1...Ke6!
    • 1.Qb4?
      • 1...Kxc6
        • 2.Qe4#
        • 2.Qb5#
      • 1...Ke6!
    • 1.Qh4?
      • 1...Kxc6
        • 2.Qe4#
      • 1...Ke6!
    • 1.Qa5+?
      • 1...Kc4
        • 2.Sb2#
      • 1...Kxc6
        • 2.Rc7#
        • 2.Qb5#
      • 1...Ke6
        • 2.Sd4#
      • 1...Ke4!
    • 1.Qb1?
      • 1...Kc4
        • 2.Qb3#
      • 1...Kxc6
        • 2.Qb5#
      • 1...Ke6
        • 2.Sf4#
      • 1...Ke4!
    • 1.Qd1?
      • 1...Kc4
        • 2.Qb3#
      • 1...Ke4
        • 2.Qf3#
      • 1...Kxc6
        • 2.Qf3#
      • 1...Ke6!
    • 1.Qf1?
      • 1...Ke4
        • 2.Qf3#
      • 1...Kxc6
        • 2.Qf3#
      • 1...Ke6
        • 2.Qf7#
      • 1...Kc4!
    • 1.Qe3?
      • 1...Kc4
        • 2.Qd4#
      • 1...Kxc6
        • 2.Qf3#
        • 2.Qe4#
      • 1...Ke6!
    • 1.Qe4+?
      • 1...Ke6
        • 2.Sf4#
        • 2.Sc5#
        • 2.Sd4#
        • 2.Sd8#
        • 2.Re7#
      • 1...Kxe4!
  • Keys
    • 1.Qf2!
      • 1...Kc4
        • 2.Qd4#
      • 1...Ke4
        • 2.Qf3#
      • 1...Kxc6
        • 2.Qf3#
      • 1...Ke6
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT,XS(E)::QAB(A)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(a);S_FLIGHT::S(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(C);CHECK
      • Refutation
        • K(a);S_FLIGHT,XS(E)
    • Try
      • S(E);
      • Vars
        • K(a);P-FLIGHT::R(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT,XS(E)::QAB(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT::S(C)
        • K(a);S_FLIGHT::S(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
        • K(a);S_FLIGHT,XS(E)::QAB1(A)
        • K(a);S_FLIGHT::S(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
        • K(a);S_FLIGHT,XS(E)::QAB(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
        • K(a);S_FLIGHT,XS(E)::QAB(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);S_FLIGHT,XQ(A)
  • Actual
    • Q(A);
    • Vars
      • K(a);S_FLIGHT::QAR1(A)
      • K(a);S_FLIGHT::QAB1(A)
      • K(a);S_FLIGHT,XS(E)::QAB(A)
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