MESON Chess Problem Database

Problem Display
PID: 278083 (3nBB2/2PN4/R1b5/p2kP3/p2p2R1/K2N4/3Pp3/4Q3 w - - 0 1)

Chepizhni, Viktor Ivanovich

Phenix, 2007

3nBB2/2PN4/R1b5/p2kP3/p2p2R1/K2N4/3Pp3/4Q3

#2

11 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Se6
      • 2.Sb6#
    • 1...Sb7
      • 2.Bf7#
    • 1...Sf7
      • 2.Bxf7#
  • Tries
    • 1.Sf6+?
      • 1...Ke6
        • 2.c8Q#
        • 2.c8B#
      • 1...Kc4!
    • 1.Bf7+?
      • 1...Se6
        • 2.Sb6#
      • 1...Sxf7!
    • 1.Rxc6?
      • threat
        • 2.Sb6#
        • 2.Sf6#
        • 2.Qh1#
      • 1...Sxc6
        • 2.Bf7#
      • 1...Kxc6!
    • 1.Qxe2?
      • threat
        • 2.Sf4#
      • 1...Kc4
        • 2.Sb4#
      • 1...Se6
        • 2.Sb6#
      • 1...Ke6!
    • 1.c8Q?
      • threat
        • 2.Sb6#
      • 1...Ke6
        • 2.Sf6#
      • 1...Bxd7
        • 2.Rd6#
        • 2.Qh1#
        • 2.Qc5#
      • 1...Kc4!
  • Keys
    • 1.Qb1!
      • threat
        • 2.Qa2#
      • 1...Kc4
        • 2.Sb6#
      • 1...Ke6
        • 2.Sf4#
      • 1...Bb5
        • 2.Qxb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • S(g);SBLOCK::S(I)
    • S(g);N_GUARD::B(J)
    • S(g);N_GUARD::B(J),XS(g)
  • Tries
    • Try
      • S(I);CHECK
      • Vars
        • K(e);N_GUARD,P_SPINB(f),S_FLIGHT::P=Q
      • Refutation
        • K(e);P_SPINP(c),S_FLIGHT
    • Try
      • B(J);CHECK
      • Vars
        • S(g);P_SPINS(g)::S(I)
      • Refutation
        • S(g);XB(J)
    • Try
      • R(G);XB(f)
      • Threat
        • DUALS(3)
      • Vars
        • S(g);N_GUARD,SBLOCK,XR(G)::B(J)
      • Refutation
        • K(e);S_FLIGHT,XR(G)
    • Try
      • Q(A);XP(a)
      • Threat
        • S(D)
      • Vars
        • K(e);N_GUARD,P_SPINP(c),S_CUTP(d),S_FLIGHT::QAB(A)+S(D)
        • S(g);SBLOCK::S(I)
      • Refutation
        • K(e);P_SPINB(f),S_FLIGHT
    • Try
      • P(H);
      • Threat
        • S(I)
      • Vars
        • K(e);N_GUARD,P_SPINB(f),S_FLIGHT::QAB(H)+S(I)
      • Refutation
        • K(e);P_SPINB(f),P_SPINP(c),S_FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • K(e);N_GUARD,P_SPINP(c),S_FLIGHT::S(I)
      • K(e);N_GUARD,P_SPINB(f),S_FLIGHT::S(D)
      • B(f);N_GUARD::QAR2(A),XB(f)
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