MESON Chess Problem Database

Problem Display
PID: 12075 (1b6/3Q4/8/K1k1n1R1/3p4/1R6/2P5/8 w - - 0 1)

di Vincenzi, Renato

Unpublished, 1974

1b6/3Q4/8/K1k1n1R1/3p4/1R6/2P5/8

#2

5 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Qb5#
    • 1...Bd6
      • 2.Qb5#
    • 1...d3
      • 2.Rc3#
  • Tries
    • 1.Rb6?
      • threat
        • 2.Rc6#
        • 2.Qb5#
        • 2.Qc6#
      • 1...Bd6
        • 2.Qb5#
        • 2.Qc6#
      • 1...Bc7
        • 2.Qb5#
        • 2.Qc6#
      • 1...d3
        • 2.Rc6#
      • 1...Kc4!
    • 1.Rxe5+?
      • 1...Kc4
        • 2.Qa4#
        • 2.Qb5#
        • 2.Qc6#
        • 2.Qe6#
        • 2.Qd5#
        • 2.Qf7#
      • 1...Bxe5!
    • 1.Qc7+?
      • 1...Kd5
        • 2.Rxe5#
      • 1...Bxc7+!
  • Keys
    • 1.c4!
      • threat
        • 2.Qd5#
      • 1...Bc7+
        • 2.Qxc7#
      • 1...Kxc4
        • 2.Qb5#
      • 1...dxc4 ep
        • 2.Rxc3#
      • 1...Bd6
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(b);N_SPINS(c),P-FLIGHT::QAB1(E)
    • B(d);SBLOCK::QAR1(E)
    • P(a);N_GUARD::R(B)
  • Tries
    • Try
      • R(B);
      • Threat
        • DUALS(3)
      • Vars
        • P(a);::R1(B)
      • Refutation
        • K(b);N_SPINS(c),P-FLIGHT
    • Try
      • R(D);CHECK,XS(c)
      • Refutation
        • B(d);XR(D)
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);P-FLIGHT::R1(D),XS(c)
      • Refutation
        • B(d);CHECK,XQ(E)
  • Actual
    • P(A);
    • Threat
      • QAR1(E)
    • Vars
      • B(d);CHECK,N_GUARD::QAR2(E),XB(d)
      • K(b);N_SPINS(c),P-FLIGHT,XP(A)::QAB1(E)
      • P(a);EP,OGATEB,XP(A)::R(B),XP(a)
      • B(d);SBLOCK::QAR1(E)
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