MESON Chess Problem Database

Problem Display
PID: 248952 (3R4/1qp1p3/1p3p2/3nkB1K/1p3r1N/NQ4B1/b4P2/2n5 w - - 0 1)

Shavirin, Valery Mikhailovich

Uralski Problemist, 1999

3R4/1qp1p3/1p3p2/3nkB1K/1p3r1N/NQ4B1/b4P2/2n5

#2

8 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qe3#
    • 1...Qa6
      • 2.Rxd5#
    • 1...Qc8
      • 2.Rxd5#
    • 1...Qa7
      • 2.Rxd5#
    • 1...Qb8
      • 2.Rxd5#
    • 1...Sc3
      • 2.Sc4#
    • 1...Se3
      • 2.Qb2#
  • Tries
    • 1.Sg6+?
      • 1...Kd4
        • 2.Qe3#
      • 1...Kxf5!
    • 1.Bxf4+?
      • 1...Kd4
        • 2.Qe3#
      • 1...Kxf4
        • 2.Qg3#
      • 1...Sxf4+!
    • 1.Qd3?
      • threat
        • 2.Sf3#
        • 2.Sg6#
        • 2.Qe4#
      • 1...Bb1
        • 2.Sc4#
        • 2.Sf3#
        • 2.Sg6#
      • 1...Sc3
        • 2.Sg6#
        • 2.Qd4#
      • 1...Se3
        • 2.Sg6#
        • 2.Qd4#
      • 1...Sxd3!
    • 1.Qf3?
      • threat
        • 2.Qe4#
      • 1...Kd4
        • 2.Qe3#
      • 1...Sc3
        • 2.Bxf4#
        • 2.Qxf4#
      • 1...Se3
        • 2.Bxf4#
        • 2.Qxf4#
      • 1...Bb1!
  • Keys
    • 1.Kg6!
      • threat
        • 2.Sf3#
      • 1...Kd4
        • 2.Qe3#
      • 1...Sc3
        • 2.Sc4#
      • 1...Se3
        • 2.Qb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • K(f);N_SPINR(d),P_SPINS(e),S_FLIGHT::QAB1(C)
    • Q(i);N_GUARD::R1(H),XS(e)
    • S(e);::S(B)
    • S(e);N_GUARD::QAB(C)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(f);N_SPINR(d),P_SPINS(e),S_FLIGHT::QAB1(C)
      • Refutation
        • K(f);N_SPINR(d),P-FLIGHT,XB(F)
    • Try
      • B(D);CHECK,XR(d)
      • Vars
        • K(f);P_SPINS(e),S_FLIGHT::QAB1(C)
        • K(f);S_FLIGHT,XB(D)::QAB1(C)
      • Refutation
        • S(e);CHECK,XB(D)
    • Try
      • Q(C);
      • Threat
        • DUALS(3)
      • Refutation
        • S(a);XQ(C)
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • K(f);N_SPINR(d),P_SPINS(e),S_FLIGHT::QAB1(C)
      • Refutation
        • B(b);
  • Actual
    • K(G);S_FLIGHT
    • Threat
      • S(E)
    • Vars
      • K(f);N_SPINR(d),P_SPINS(e),S_FLIGHT::QAB1(C)
      • S(e);::S(B)
      • S(e);N_GUARD::QAB(C)
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