MESON Chess Problem Database

Problem Display
PID: 54555 (4BB2/2nq4/1p2P2p/3P1Q2/p1kN2NR/2n1P1p1/P3P3/K1R1b2r w - - 0 1)

Bogdanov, Evgeny Mikhailovich

3rd Prize, Odessa-90 TT, 1990

4BB2/2nq4/1p2P2p/3P1Q2/p1kN2NR/2n1P1p1/P3P3/K1R1b2r

#2

13 + 10

4827 FIDE Album (1989-1991) 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd5
      • 2.Qd3#
    • 1...Sxd5
      • 2.Se5#
      • 2.Qd3#
  • Tries
    • 1.Rxc3+?
      • 1...Kxc3
        • 2.Qc2#
        • 2.Qd3#
      • 1...Bxc3+!
    • 1.Qe4?
      • threat
        • 2.Se5#
      • 1...Qxe6
        • 2.Sxe6#
      • 1...Qxd5
        • 2.Qd3#
      • 1...Qd6
        • 2.Sb3#
      • 1...Qe7
        • 2.Sb3#
      • 1...Qg7!
  • Keys
    • 1.Sb3!
      • threat
        • 2.Qd3#
      • 1...Kb5
        • 2.Qd3#
      • 1...Qxd5
        • 2.Se5#
      • 1...Qd6
        • 2.Qe4#
      • 1...Qe7
        • 2.Qe4#
      • 1...Qh7
        • 2.Sh2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • Q(j);SBLOCK,XP(I)::QAB1(J)
  • Tries
    • Try
      • R(B);CHECK,XS(c)
      • Refutation
        • B(a);CHECK,XR(B)
    • Try
      • Q(J);
      • Threat
        • S(G)
      • Vars
        • Q(j);XP(K)::QAR(J)+S(F),XQ(j)
        • Q(j);SBLOCK,XP(I)::QAB1(J)
        • Q(j);::QAR(J)+S(F)
      • Refutation
        • Q(j);
  • Actual
    • S(F);
    • Threat
      • QAB1(J)
    • Vars
      • K(f);N_SPINS(c),P_SPINQ(j),S_FLIGHT::QAB(J)
      • Q(j);SBLOCK,XP(I)::R(H)+S(G),DCHECK
      • Q(j);::QAR2(J)
      • Q(j);::R(H)+S(G)
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