MESON Chess Problem Database

Problem Display
PID: 275601 (6n1/5Q2/2p5/2K1kp2/5p2/3br3/3P2BN/8 w - - 0 1)

Kozhakin, Vladimir Vladimirovich

Phenix, 2001

6n1/5Q2/2p5/2K1kp2/5p2/3br3/3P2BN/8

#2

5 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Re4
      • 2.Sf3#
    • 1...Bb1
      • 2.d4#
    • 1...Bf1
      • 2.d4#
    • 1...Bc2
      • 2.d4#
    • 1...Be2
      • 2.d4#
    • 1...Bc4
      • 2.d4#
    • 1...Be4
      • 2.d4#
    • 1...Bb5
      • 2.d4#
    • 1...Ba6
      • 2.d4#
    • 1...Sf6
      • 2.Qe7#
    • 1...Sh6
      • 2.Qe7#
    • 1...Se7
      • 2.Qxe7#
  • Tries
    • 1.Sf3+?
      • 1...Ke4
        • 2.Qe6#
      • 1...Rxf3!
    • 1.Qe8+?
      • 1...Se7
        • 2.Qxe7#
      • 1...Kf6!
    • 1.Qg7+?
      • 1...Sf6
        • 2.Qe7#
      • 1...Ke6!
  • Keys
    • 1.Be4!
      • threat
        • 2.Qxf5#
      • 1...Kxe4
        • 2.Qe6#
      • 1...Rxe4
        • 2.Sf3#
      • 1...Bxe4
        • 2.d4#
      • 1...fxe4
        • 2.Sg4#
      • 1...Sf6
        • 2.Qe7#
      • 1...Sh6
        • 2.Qe7#
      • 1...Se7
        • 2.Qxe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • R(b);N_GUARD,SBLOCK::S(C)
    • B(a);OGATE::P(A)
    • S(g);N_GUARD::QAR2(E)
    • S(g);N_GUARD::QAR2(E),XS(g)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(d);N_GUARD,P-FLIGHT::QAR2(E)
      • Refutation
        • R(b);XS(C)
    • Try
      • Q(E);CHECK
      • Vars
        • S(g);N_GUARD,P_SPINS(g)::QAR2(E),XS(g)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • S(g);N_GUARD,P_SPINS(g)::QAR2(E)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • B(B);
    • Threat
      • QAR1(E),XP(e)
    • Vars
      • K(d);N_GUARD,P-FLIGHT,XB(B)::QAR2(E)
      • R(b);N_GUARD,SBLOCK,XB(B)::S(C)
      • B(a);OGATE,SBLOCK,XB(B)::P(A)
      • P(e);N_GUARD,SBLOCK,XB(B)::S(C)
      • S(g);N_GUARD::QAR2(E)
      • S(g);N_GUARD::QAR2(E),XS(g)
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