MESON Chess Problem Database

Problem Display
PID: 164375 (b7/4Q1p1/4P2p/4rP2/4p1p1/4k3/2PR2K1/2Bn4 w - - 0 1)

Pikhurov, Dimitry Egorovich

Schach, 2001

b7/4Q1p1/4P2p/4rP2/4p1p1/4k3/2PR2K1/2Bn4

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Rf2#
    • 1...h5
      • 2.Qg5#
  • Tries
    • 1.Qa3+?
      • 1...Kf4
        • 2.Rf2#
      • 1...Sc3!
    • 1.Qb4?
      • threat
        • 2.Rf2#
      • 1...Kf4
        • 2.Rf2#
      • 1...Sf2
        • 2.Rxf2#
      • 1...Rd5!
    • 1.Qh4?
      • threat
        • 2.Qg3#
      • 1...Kf4
        • 2.Rf2#
      • 1...g3
        • 2.Qxg3#
      • 1...Rxf5!
    • 1.Qc5+?
      • 1...Kf4
        • 2.Rf2#
      • 1...Rxc5!
    • 1.Qd6?
      • threat
        • 2.Rf2#
      • 1...Kf4
        • 2.Rf2#
      • 1...Rd5
        • 2.Qg3#
      • 1...Sf2
        • 2.Rxf2#
      • 1...Bd5!
    • 1.Qa7+?
      • 1...Kf4
        • 2.Rf2#
      • 1...Rc5!
  • Keys
    • 1.Qxg7!
      • threat
        • 2.Qxh6#
      • 1...Kf4
        • 2.Rf2#
      • 1...Rxf5
        • 2.Rf2#
      • 1...Rxe6
        • 2.Rf2#
      • 1...h5
        • 2.Qh6#
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(b);S_FLIGHT::B(A)+R(C),DCHECK
    • P(f);N_GUARD::QAB(G)
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • K(b);S_FLIGHT::B(A)+R(C),DCHECK
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • Q(G);
      • Threat
        • B(A)+R(C)
      • Vars
        • K(b);P_SPINP(c),S_FLIGHT::B(A)+R(C),DCHECK
        • S(a);::B(A)+R(C),XS(a)
      • Refutation
        • R(e);
    • Try
      • Q(G);
      • Threat
        • QAR2(G)
      • Vars
        • K(b);P_SPINP(d),S_FLIGHT::B(A)+R(C),DCHECK
        • P(d);::QAR2(G),XP(d)
      • Refutation
        • R(e);XP(E)
    • Try
      • Q(G);CHECK
      • Vars
        • K(b);S_FLIGHT::B(A)+R(C),DCHECK
      • Refutation
        • R(e);XQ(G)
    • Try
      • Q(G);
      • Threat
        • B(A)+R(C)
      • Vars
        • K(b);P_SPINR(e),S_FLIGHT::B(A)+R(C),DCHECK
        • R(e);OGATE::QAR2(G)
        • S(a);::B(A)+R(C),XS(a)
      • Refutation
        • B(h);
    • Try
      • Q(G);CHECK
      • Vars
        • K(b);S_FLIGHT::B(A)+R(C),DCHECK
      • Refutation
        • R(e);P_SPINR(e)
  • Actual
    • Q(G);XP(g)
    • Threat
      • QAB(G),XP(f)
    • Vars
      • K(b);S_FLIGHT::B(A)+R(C),DCHECK
      • R(e);XP(E)::B(A)+R(C)
      • R(e);XP(F)::B(A)+R(C)
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