MESON Chess Problem Database

Problem Display
PID: 63512 (bB4n1/5Qp1/7N/1N1pp3/K3kp1n/6P1/2P1BPpr/b7 w - - 0 1)

Erokhin, Vladimir Alekseevich

2nd Prize, 64 Shakhmatnoe obozrenie, 1976

bB4n1/5Qp1/7N/1N1pp3/K3kp1n/6P1/2P1BPpr/b7

#2

9 + 11

3771 FIDE Album (1974-1976) 1980

SOLUTION

  • SOUND
  • Sets
    • 1...Bd4
      • 2.Sd6#
    • 1...Sf3
      • 2.Bd3#
      • 2.Qg6#
      • 2.Qf5#
    • 1...Sf5
      • 2.Qxf5#
    • 1...Sg6
      • 2.Qxg6#
      • 2.Qf5#
    • 1...fxg3
      • 2.Bd3#
    • 1...f3
      • 2.Bd3#
    • 1...d4
      • 2.Sd6#
  • Tries
    • 1.Sf5?
      • threat
        • 2.Sbd6#
        • 2.Sfd6#
      • 1...fxg3
        • 2.Sxg3#
        • 2.Sfd6#
      • 1...Bc6
        • 2.Sd6#
      • 1...Sxf5!
    • 1.Bf3+?
      • 1...Sxf3
        • 2.Qg6#
        • 2.Qf5#
      • 1...Kxf3!
    • 1.Ba7?
      • threat
        • 2.Sd6#
      • 1...Sf5
        • 2.Qxf5#
        • 2.f3#
      • 1...Bc6!
    • 1.Qg6+?
      • 1...Sf5
        • 2.Qxf5#
      • 1...Sxg6!
    • 1.Qa7?
      • threat
        • 2.Sd6#
      • 1...fxg3
        • 2.Qe3#
      • 1...d4
        • 2.Qxa8#
      • 1...Sf5
        • 2.f3#
      • 1...Bc6!
  • Keys
    • 1.Qh5!
      • threat
        • 2.Bd3#
      • 1...fxg3
        • 2.Qg4#
      • 1...d4
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 3
  • Sets
    • B(a);SBLOCK::S(F)
    • S(f);N_GUARD::QAB1(H),XS(f)
    • P(e);XP(D)::B(B)
    • P(e);::B(B)
    • P(g);SBLOCK::S(F)
  • Tries
    • Try
      • S(G);
      • Threat
        • DUALS(2)
      • Vars
        • B(j);P_PINS(F)::S(G)
      • Refutation
        • S(f);XS(G)
    • Try
      • B(B);CHECK
      • Refutation
        • K(d);P_SPINP(e),S_FLIGHT,XB(B)
    • Try
      • B(I);
      • Threat
        • S(F)
      • Refutation
        • B(j);P_PINS(F)
    • Try
      • Q(H);CHECK
      • Vars
        • S(f);N_GUARD,P_SPINS(f)::QAB1(H),XS(f)
      • Refutation
        • S(f);XQ(H)
    • Try
      • Q(H);
      • Threat
        • S(F)
      • Vars
        • P(e);N_GUARD,XP(D)::QAR1(H)
        • P(g);OGATEB::QAB(H),XB(j)
        • S(f);N_GUARD::P(C)
      • Refutation
        • B(j);P_PINS(F)
  • Actual
    • Q(H);
    • Threat
      • B(B)
    • Vars
      • P(e);OGATEB,XP(D)::QAR2(H)
      • P(g);S_CUTB(a)::QAR1(H),XP(h)
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