MESON Chess Problem Database

Problem Display
PID: 225974 (8/7r/2R5/1P1k3p/r2N2p1/P2B4/1b2R1P1/6QK w - - 0 1)

Nagnibida, Mykola Ivanovich

Zadachi i Etyudi, 1999

8/7r/2R5/1P1k3p/r2N2p1/P2B4/1b2R1P1/6QK

#2

9 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa3
      • 2.Bc4#
    • 1...Rc4
      • 2.Bxc4#
    • 1...Ra5
      • 2.Bc4#
    • 1...Ra6
      • 2.Bc4#
    • 1...Raa7
      • 2.Bc4#
    • 1...Ra8
      • 2.Bc4#
  • Tries
    • 1.Rce6?
      • threat
        • 2.R2e5#
      • 1...Kc5
        • 2.R2e5#
      • 1...Bxd4!
    • 1.Qh2?
      • threat
        • 2.Qe5#
        • 2.Qd6#
      • 1...Kxd4
        • 2.Qd6#
      • 1...Bxa3
        • 2.Qe5#
      • 1...Bxd4
        • 2.Be4#
        • 2.Qd6#
      • 1...Rh6
        • 2.Qe5#
      • 1...Rd7
        • 2.Qe5#
      • 1...Re7
        • 2.Qd6#
      • 1...g3!
    • 1.Qe3?
      • threat
        • 2.Qe4#
        • 2.Qe5#
      • 1...Rxd4
        • 2.Qg5#
        • 2.Qe5#
        • 2.Qe6#
      • 1...Bxd4
        • 2.Qe4#
        • 2.Qe6#
      • 1...Re7!
  • Keys
    • 1.Sf3!
      • threat
        • 2.Qc5#
      • 1...Bxa3
        • 2.Re5#
      • 1...Rd4
        • 2.Re5#
      • 1...Rc4
        • 2.Bxc4#
      • 1...Bd4
        • 2.Be4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • R(b);N_GUARD,XP(E)::B(F)
    • R(b);N_GUARD::B(F),XR(b)
    • R(b);N_GUARD::B(F)
  • Tries
    • Try
      • R(I);
      • Threat
        • R1(C)
      • Vars
        • K(d);P-FLIGHT::R(C)
      • Refutation
        • B(a);XS(G)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(d);P-FLIGHT,XS(G)::QAR2(A)
        • B(a);XP(E)::QAR1(A)
        • R(f);::QAR1(A)
      • Refutation
        • P(c);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Refutation
        • R(f);
  • Actual
    • S(G);
    • Threat
      • QAR1(A)
    • Vars
      • B(a);N_GUARD,XP(E)::R1(C)
      • R(b);S_CUTB(a)::R1(C)
      • R(b);N_GUARD::B(F),XR(b)
      • B(a);S_CUTR(b)::B(F)
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