MESON Chess Problem Database

Problem Display
PID: 78481 (8/8/1B3Q2/8/2BNk3/6n1/8/2K5 w - - 0 1)

Kozhakin, Vladimir Vladimirovich

Problem Observer, 2008

8/8/1B3Q2/8/2BNk3/6n1/8/2K5

#2

5 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Ke3
      • 2.Qf3#
  • Tries
    • 1.Kd2?
      • 1...Sf5
        • 2.Qxf5#
      • 1...Sh1
        • 2.Qf5#
      • 1...Se2
        • 2.Qf5#
      • 1...Sh5
        • 2.Qf5#
      • 1...Sf1+!
    • 1.Bd3+?
      • 1...Ke3
        • 2.Qf3#
      • 1...Kd5
        • 2.Qe6#
      • 1...Kxd3!
    • 1.Bc7?
      • threat
        • 2.Qe5#
        • 2.Qf4#
      • 1...Ke3
        • 2.Qf4#
      • 1...Sf5
        • 2.Qe5#
      • 1...Sh5
        • 2.Qe5#
      • 1...Se2+!
    • 1.Qh4+?
      • 1...Ke5
        • 2.Bc7#
      • 1...Ke3!
    • 1.Qf5+?
      • 1...Ke3
        • 2.Sc2#
        • 2.Se2#
        • 2.Sb3#
        • 2.Sf3#
        • 2.Sb5#
        • 2.Sc6#
        • 2.Se6#
        • 2.Qf3#
      • 1...Sxf5!
  • Keys
    • 1.Bd5+!
      • 1...Kd3
        • 2.Qf3#
      • 1...Ke3
        • 2.Qf3#
      • 1...Kxd5
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT::QAR1(E)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Vars
        • S(a);N_GUARD::QAB1(E),XS(a)
        • S(a);N_GUARD::QAB1(E)
      • Refutation
        • S(a);CHECK
    • Try
      • B(B);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(E)
        • K(b);S_FLIGHT::QAB1(E)
      • Refutation
        • K(b);S_FLIGHT,XB(B)
    • Try
      • B(D);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);P-FLIGHT::QAB1(E)
        • S(a);::QAR1(E)
      • Refutation
        • S(a);CHECK
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);P-FLIGHT::B(D)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(E);CHECK
      • Refutation
        • S(a);XQ(E)
  • Actual
    • B(B);CHECK
    • Vars
      • K(b);S_FLIGHT::QAR2(E)
      • K(b);P-FLIGHT::QAR1(E)
      • K(b);S_FLIGHT,XB(B)::QAB1(E)
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