MESON Chess Problem Database

Problem Display
PID: 144849 (3R4/4qN2/3NP3/3k4/7n/5n2/bBQ3B1/5K2 w - - 0 1)

Berry, Charles Vincent E

British Chess Magazine, 1900

3R4/4qN2/3NP3/3k4/7n/5n2/bBQ3B1/5K2

#2

8 + 5

14868 Pirnie Collection 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd6
      • 2.Rxd6#
    • 1...Bb1
      • 2.Qc4#
    • 1...Bc4+
      • 2.Qxc4#
  • Tries
    • 1.Ba3?
      • threat
        • 2.Qe4#
      • 1...Bc4+
        • 2.Qxc4#
      • 1...Kd4
        • 2.Sf5#
      • 1...Qxd6
        • 2.Rxd6#
      • 1...Qxe6
        • 2.Qc5#
      • 1...Bb1
        • 2.Qc4#
      • 1...Kxe6!
    • 1.Bxf3+?
      • 1...Kxe6
        • 2.Qe4#
        • 2.Qe2#
      • 1...Sxf3!
  • Keys
    • 1.Bd4!
      • threat
        • 2.Qe4#
      • 1...Bc4+
        • 2.Qxc4#
      • 1...Kxd4
        • 2.Sf5#
      • 1...Kxe6
        • 2.Qxa2#
      • 1...Qxd6
        • 2.Rxd6#
      • 1...Qxe6
        • 2.Qc5#
      • 1...Bb1
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(e);OGATE,P_SPINQ(e),XS(E)::R1(H),XQ(e)
    • B(a);N_GUARD::QAB1(C)
    • B(a);CHECK,N_GUARD::QAB1(C),XB(a)
  • Tries
    • Try
      • B(B);
      • Threat
        • QAB1(C)
      • Vars
        • B(a);CHECK,N_GUARD::QAB1(C),XB(a)
        • K(d);N_SPINS(b),P-FLIGHT::R(H)+S(E),DCHECK
        • Q(e);OGATE,P_SPINQ(e),XS(E)::R1(H),XQ(e)
        • Q(e);SBLOCK,XP(F)::QAR1(C)
        • B(a);N_GUARD::QAB1(C)
      • Refutation
        • K(d);N_SPINS(b),S_FLIGHT,XP(F)
    • Try
      • B(D);CHECK,XS(b)
      • Refutation
        • S(c);XB(D)
  • Actual
    • B(B);
    • Threat
      • QAB1(C)
    • Vars
      • B(a);CHECK,N_GUARD::QAB1(C),XB(a)
      • K(d);N_SPINS(b),P-FLIGHT,XB(B)::R(H)+S(E),DCHECK
      • K(d);N_SPINS(b),S_FLIGHT,XP(F)::QAB(C),XB(a)
      • Q(e);OGATE,P_SPINQ(e),XS(E)::R1(H),XQ(e)
      • Q(e);SBLOCK,XP(F)::QAR1(C)
      • B(a);N_GUARD::QAB1(C)
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