MESON Chess Problem Database

Problem Display
PID: 246653 (8/6N1/8/7b/3k4/3B2B1/8/K2Q4 w - - 0 1)

Kozhakin, Vladimir Vladimirovich

Magadanskaya Pravda, 1998

8/6N1/8/7b/3k4/3B2B1/8/K2Q4

#2

5 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ke3
      • 2.Sf5#
  • Tries
    • 1.Bf1+?
      • 1...Kc3
        • 2.Be1#
      • 1...Ke3
        • 2.Qd3#
      • 1...Ke4
        • 2.Qd3#
      • 1...Kc5
        • 2.Qd6#
      • 1...Bxd1!
    • 1.Ba6+?
      • 1...Kc3
        • 2.Be1#
      • 1...Ke3
        • 2.Qd3#
      • 1...Ke4
        • 2.Qd3#
      • 1...Kc5
        • 2.Qd6#
      • 1...Bxd1!
  • Keys
    • 1.Be2+!
      • 1...Kc3
        • 2.Be1#
      • 1...Ke3
        • 2.Qd3#
      • 1...Ke4
        • 2.Qd3#
      • 1...Kc5
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::S(E)
  • Tries
    • Try
      • B(C);CHECK
      • Vars
        • K(a);S_FLIGHT::B(D)
        • K(a);S_FLIGHT::QAR1(B)
        • K(a);P-FLIGHT::QAB1(B)
        • K(a);OGATE,S_FLIGHT::QAB1(B)
      • Refutation
        • B(b);XQ(B)
    • Try
      • B(C);CHECK
      • Vars
        • K(a);S_FLIGHT::B(D)
        • K(a);S_FLIGHT::QAR1(B)
        • K(a);P-FLIGHT::QAB1(B)
        • K(a);OGATE,S_FLIGHT::QAB1(B)
      • Refutation
        • B(b);XQ(B)
  • Actual
    • B(C);CHECK
    • Vars
      • K(a);S_FLIGHT::B(D)
      • K(a);S_FLIGHT::QAR1(B)
      • K(a);P-FLIGHT::QAB1(B)
      • K(a);OGATE,S_FLIGHT::QAB1(B)
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