MESON Chess Problem Database

Problem Display
PID: 133171 (B1K5/5Q2/1B1P4/4k3/5p2/2pr4/5P2/6N1 w - - 0 1)

Dragoescu, Radu

1st Place, Romanian Chess Federation, 1990

B1K5/5Q2/1B1P4/4k3/5p2/2pr4/5P2/6N1

#2

7 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd6
      • 2.Qf6#
    • 1...Rxd6
      • 2.Sf3#
  • Tries
    • 1.Sf3+?
      • 1...Kxd6
        • 2.Qf6#
        • 2.Qd7#
      • 1...Rxf3!
    • 1.Bd4+?
      • 1...Kxd4
        • 2.Qd5#
      • 1...Kxd6
        • 2.Qf6#
        • 2.Qd7#
      • 1...Rxd4!
    • 1.Be4?
      • threat
        • 2.Qe7#
      • 1...Kxe4
        • 2.Qe6#
      • 1...Kxd6
        • 2.Qf6#
      • 1...Rxd6
        • 2.Qf5#
      • 1...f3!
    • 1.Qf5+?
      • 1...Kxd6
        • 2.Bc5#
        • 2.Qf6#
      • 1...Kxf5!
  • Keys
    • 1.Bd8!
      • threat
        • 2.Qf6#
      • 1...Kd4
        • 2.Qd5#
      • 1...Kxd6
        • 2.Qe7#
      • 1...Rxd6
        • 2.Sf3#
      • 1...Rd5
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(d);S_FLIGHT,XP(D)::QAR2(E)
    • R(b);N_GUARD,SBLOCK,XP(D)::S(A)
  • Tries
    • Try
      • S(A);CHECK
      • Refutation
        • R(b);XS(A)
    • Try
      • B(C);CHECK
      • Vars
        • K(d);S_FLIGHT,XB(C)::QAR1(E)
      • Refutation
        • R(b);XB(C)
    • Try
      • B(F);
      • Threat
        • QAR2(E)
      • Vars
        • K(d);P-FLIGHT,XB(F)::QAR2(E)
        • K(d);S_FLIGHT,XP(D)::QAR2(E)
        • R(b);SBLOCK,XP(D)::QAR1(E)
      • Refutation
        • P(c);
    • Try
      • Q(E);CHECK
      • Refutation
        • K(d);P-FLIGHT,XQ(E)
  • Actual
    • B(C);
    • Threat
      • QAB1(E)
    • Vars
      • K(d);S_FLIGHT::QAR1(E)
      • K(d);S_FLIGHT,XP(D)::QAB1(E)
      • R(b);N_GUARD,SBLOCK,XP(D)::S(A)
      • R(b);N_GUARD::QAR1(E),XR(b)
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