MESON Chess Problem Database

Problem Display
PID: 46139 (1K2R3/1p2N3/5r2/1RBnkB1N/2p1p3/2qppP2/8/8 w - - 0 1)

Dyachuk, Vasyl Vasilovich

2nd Prize, Portoroz Quick Composing Ty., 2002

1K2R3/1p2N3/5r2/1RBnkB1N/2p1p3/2qppP2/8/8

#2

8 + 9

23 Die Schwalbe 2002
56 The Problemist 2002

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf5
      • 2.Sc6#
      • 2.Sg6#
    • 1...Sb4
      • 2.f4#
    • 1...Sb6
      • 2.f4#
    • 1...Sc7
      • 2.f4#
  • Tries
    • 1.Bxe3?
      • threat
        • 2.Rxd5#
      • 1...Kd6
        • 2.Rxd5#
      • 1...Rxf5
        • 2.Sc8#
      • 1...Qd4
        • 2.Bf4#
      • 1...Rd6
        • 2.f4#
      • 1...Qa5!
    • 1.Bd4+?
      • 1...Kxd4
        • 2.Rxd5#
      • 1...Kd6
        • 2.Rxd5#
      • 1...Qxd4!
    • 1.Bd6+?
      • 1...Kd4
        • 2.Rxd5#
      • 1...Kxd6
        • 2.Rxd5#
      • 1...Rxd6!
    • 1.fxe4?
      • threat
        • 2.Sc6#
        • 2.Sg6#
      • 1...Re6
        • 2.Sg6#
      • 1...Rc6
        • 2.Sxc6#
        • 2.Sg6#
      • 1...Rg6
        • 2.Sc6#
        • 2.Sxg6#
      • 1...Sxe7!
  • Keys
    • 1.Bb4!
      • threat
        • 2.Rxd5#
      • 1...Kd4
        • 2.Rxd5#
      • 1...Rxf5
        • 2.Sc6#
      • 1...Qd4
        • 2.f4#
      • 1...Rd6
        • 2.Bxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • S(f);N_GUARD::P(A)
  • Tries
    • Try
      • B(C);P_PINS(f),XP(c)
      • Threat
        • R1(B),XS(f)
      • Vars
        • K(g);N_SPINS(f),S_FLIGHT::R1(B),XS(f)
        • R(h);N_GUARD,SBLOCK,XB(D)::R(H)+S(F)
        • Q(a);SBLOCK::B(C)
        • R(h);SBLOCK::P(A)
      • Refutation
        • Q(a);
    • Try
      • B(C);CHECK,P_PINS(f)
      • Vars
        • K(g);N_SPINS(f),S_FLIGHT,XB(C)::R1(B),XS(f)
        • K(g);N_SPINS(f),S_FLIGHT::R1(B),XS(f)
      • Refutation
        • Q(a);XB(C)
    • Try
      • B(C);CHECK,P_PINS(f)
      • Vars
        • K(g);N_SPINS(f),S_FLIGHT::R1(B),XS(f)
        • K(g);N_SPINS(f),S_FLIGHT,XB(C)::R1(B),XS(f)
      • Refutation
        • R(h);XB(C)
    • Try
      • P(A);XP(e)
      • Threat
        • DUALS(2)
      • Vars
        • R(h);::S(F)
      • Refutation
        • S(f);P_SPINS(f),XS(F)
  • Actual
    • B(C);P_PINS(f)
    • Threat
      • R1(B),XS(f)
    • Vars
      • K(g);N_SPINS(f),S_FLIGHT::R1(B),XS(f)
      • R(h);SBLOCK,XB(D)::R(H)+S(F),DCHECK
      • Q(a);SBLOCK::P(A)
      • R(h);SBLOCK::B(C),XQ(a)
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