MESON Chess Problem Database

Problem Display
PID: 251360 (1K5b/2B2Q2/1p2p3/1p4N1/5R2/1PkP4/n2R4/2nB1N2 w - - 0 1)

Markovsky, Grigory F

Probleemblad, 1982

1K5b/2B2Q2/1p2p3/1p4N1/5R2/1PkP4/n2R4/2nB1N2

#2

10 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Be5
      • 2.Bxe5#
    • 1...b4
      • 2.Rc4#
  • Tries
    • 1.Se4+?
      • 1...Kd4
        • 2.Qd7#
      • 1...Kb4!
    • 1.Rc2+?
      • 1...Kxd3
        • 2.Qg6#
        • 2.Qh7#
      • 1...Kxb3!
    • 1.Qf6+?
      • 1...e5
        • 2.Bxe5#
        • 2.Qc6#
      • 1...Bxf6!
    • 1.Qg7+?
      • 1...e5
        • 2.Bxe5#
      • 1...Bxg7!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Qc6#
      • 1...Sxb3
        • 2.Rc2#
      • 1...Sxd3
        • 2.Qxd3#
      • 1...Bd4
        • 2.Qxd4#
      • 1...Sb4
        • 2.Se4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • B(g);N_GUARD,P_PINB(H)::B(H),XB(g)
    • P(d);N_GUARD::R1(F)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(c);N_GUARD,S_FLIGHT::QAR(I)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • R(C);CHECK
      • Refutation
        • K(c);P-FLIGHT,P_SPINP(f),XP(D)
    • Try
      • Q(I);CHECK
      • Refutation
        • B(g);XQ(I)
    • Try
      • Q(I);CHECK
      • Vars
        • P(f);P_SPINP(f)::B(H),XP(f)
      • Refutation
        • B(g);XQ(I)
  • Actual
    • Q(I);
    • Threat
      • QAR(I)
    • Vars
      • S(a);SBLOCK,XP(D)::R1(C)
      • S(a);OGATE,XP(E)::QAR1(I),XS(a)
      • B(g);N_GUARD::QAB1(I),XB(g)
      • S(b);SBLOCK::S(G)
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