MESON Chess Problem Database

Problem Display
PID: 15813 (4N2K/Q2p4/2P1PB2/5k1P/3pR2P/rq6/B3R3/8 w - - 0 1)

Bogdanov, Evgeny Mikhailovich

Deutsche Schachblatter, 1988

4N2K/Q2p4/2P1PB2/5k1P/3pR2P/rq6/B3R3/8

#2

11 + 5

3297 FIDE Album (1986-1988) 1995

SOLUTION

  • SOUND
  • Sets
    • 1...d3
      • 2.Qf2#
    • 1...dxc6
      • 2.Qh7#
    • 1...dxe6
      • 2.Qh7#
    • 1...d5
      • 2.Qh7#
    • 1...d6
      • 2.Qh7#
  • Tries
    • 1.Bg5?
      • threat
        • 2.Sd6#
        • 2.Sg7#
        • 2.Rf4#
      • 1...Qxe6
        • 2.Sg7#
        • 2.Rf4#
      • 1...Qe3
        • 2.Sd6#
      • 1...Qd5
        • 2.Sg7#
        • 2.Rf4#
      • 1...Qf3
        • 2.Sd6#
        • 2.Sg7#
      • 1...Qg3
        • 2.Sg7#
      • 1...Qb4
        • 2.Sg7#
        • 2.Rf4#
      • 1...d6
        • 2.Sxd6#
        • 2.Sg7#
        • 2.Rf4#
        • 2.Qf7#
        • 2.Qh7#
      • 1...Qb8!
    • 1.Bd8?
      • threat
        • 2.Sd6#
        • 2.Sg7#
      • 1...Qxe6
        • 2.Sg7#
      • 1...Qe3
        • 2.Sd6#
      • 1...Qb8
        • 2.Sg7#
      • 1...Qd5
        • 2.Sg7#
      • 1...Qb4
        • 2.Sg7#
      • 1...d6
        • 2.Sxd6#
        • 2.Sg7#
        • 2.Qf7#
        • 2.Qh7#
      • 1...Qg3!
    • 1.Rf2+?
      • 1...Kxe4
        • 2.Qxd4#
      • 1...Qf3!
    • 1.Qc5+?
      • 1...Qd5
        • 2.Qxd5#
      • 1...d5!
    • 1.Qc7?
      • threat
        • 2.Rf4#
        • 2.Qf4#
        • 2.Qe5#
      • 1...Qxe6
        • 2.Rf4#
        • 2.Qf4#
      • 1...Qe3
        • 2.Qe5#
      • 1...Qb8
        • 2.Rf4#
      • 1...Qd5
        • 2.Rf4#
        • 2.Qf4#
      • 1...Qf3
        • 2.Qe5#
      • 1...Qb5
        • 2.Rf4#
        • 2.Qf4#
      • 1...Ra5
        • 2.Rf4#
        • 2.Qf4#
      • 1...d6
        • 2.Qh7#
      • 1...Qg3!
    • 1.Qxd7?
      • threat
        • 2.Qh7#
      • 1...Qg3
        • 2.e7#
      • 1...Qb7
        • 2.Qd5#
      • 1...Ra7!
  • Keys
    • 1.Be5!
      • threat
        • 2.Sg7#
      • 1...Kxe6
        • 2.Qxd7#
      • 1...Qe3
        • 2.Sd6#
      • 1...Qg3
        • 2.Sd6#
      • 1...Qb8
        • 2.Rf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • P(c);OGATE::QAR(I)
    • P(e);OGATE,XP(F)::QAB(I)
    • P(e);OGATE,XP(G)::QAB(I)
    • P(e);OGATE::QAB(I)
  • Tries
    • Try
      • B(H);
      • Threat
        • DUALS(3)
      • Vars
        • Q(b);::S(J)
      • Refutation
        • Q(b);P_PINS(J)
    • Try
      • B(H);
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);XP(G)::S(J)
        • Q(b);::S(J)
      • Refutation
        • Q(b);
    • Try
      • R(B);CHECK
      • Vars
        • K(d);S_FLIGHT,XR(C)::QAR1(I),XP(c)
      • Refutation
        • Q(b);P_SPINQ(b)
    • Try
      • Q(I);CHECK
      • Vars
        • Q(b);N_GUARD,P_SPINQ(b)::QAR2(I),XQ(b)
      • Refutation
        • P(e);P_SPINP(e)
    • Try
      • Q(I);
      • Threat
        • DUALS(3)
      • Vars
        • Q(b);::QAR1(I)
        • Q(b);P_PINS(J)::R1(C)
        • P(e);OGATE::QAB(I)
      • Refutation
        • Q(b);
    • Try
      • Q(I);XP(e)
      • Threat
        • QAB(I)
      • Vars
        • Q(b);N_GUARD::QAB(I)+P(G)
        • Q(b);N_GUARD::QAR2(I)
      • Refutation
        • R(a);
  • Actual
    • B(H);
    • Threat
      • S(J)
    • Vars
      • K(d);OGATEB,P_SPINQ(b),S_FLIGHT,XP(G)::QAB1(I),XP(e)
      • Q(b);::S(J)
      • Q(b);P_PINS(J)::R1(C)
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