MESON Chess Problem Database

Problem Display
PID: 174397 (8/2Q3K1/8/2pp2p1/3k1nR1/P1n5/2P2P1b/BR5B w - - 0 1)

Faria, Oswaldo

Boletim da UBP, 1988

8/2Q3K1/8/2pp2p1/3k1nR1/P1n5/2P2P1b/BR5B

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Rb4#
    • 1...c4
      • 2.Rd1#
  • Tries
    • 1.Qa5?
      • threat
        • 2.Qxc3#
      • 1...Kc4
        • 2.Qxc3#
      • 1...c4
        • 2.Bxc3#
        • 2.Qxd5#
      • 1...Ke5!
    • 1.Qe5+?
      • 1...Kc4
        • 2.Qxc3#
      • 1...Kxe5!
    • 1.Qd8?
      • threat
        • 2.Qxd5#
      • 1...Ke5
        • 2.Qf6#
      • 1...Kc4!
    • 1.Qf7?
      • threat
        • 2.Qxd5#
      • 1...Ke5
        • 2.Qf6#
      • 1...Kc4!
  • Keys
    • 1.Qc6!
      • threat
        • 2.Qxd5#
      • 1...Kc4
        • 2.Rb4#
      • 1...Ke5
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(c);N_SPINS(b),P-FLIGHT,P_SPINP(e),P_SPINS(d)::R1(B)
    • P(e);::R(B)
  • Tries
    • Try
      • Q(H);
      • Threat
        • QAB1(H),XS(b)
      • Vars
        • K(c);N_SPINS(b),P-FLIGHT,P_SPINS(d)::QAR1(H),XS(b)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(H);CHECK
      • Vars
        • K(c);N_SPINS(b),OGATE,P-FLIGHT,P_SPINS(d)::QAR1(H),XS(b)
      • Refutation
        • K(c);S_FLIGHT,XQ(H)
    • Try
      • Q(H);P_PINP(f)
      • Threat
        • QAR1(H),XP(f)
      • Vars
        • K(c);N_SPINP(f),S_FLIGHT::QAB1(H)
      • Refutation
        • K(c);N_SPINP(f),N_SPINS(b),P-FLIGHT,P_SPINS(d)
    • Try
      • Q(H);
      • Threat
        • QAR1(H),XP(f)
      • Vars
        • K(c);S_FLIGHT::QAB1(H)
      • Refutation
        • K(c);N_SPINS(b),P-FLIGHT,P_SPINP(f),P_SPINS(d)
  • Actual
    • Q(H);
    • Threat
      • QAR1(H),XP(f)
    • Vars
      • K(c);N_SPINS(b),P-FLIGHT,P_SPINP(e),P_SPINS(d)::R1(B)
      • K(c);S_FLIGHT::QAB1(H)
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