MESON Chess Problem Database

Problem Display
PID: 9893 (8/3Q4/4n3/K1k5/3p4/1R6/2P5/8 w - - 0 1)

di Vincenzi, Renato

Unpublished, 1960

8/3Q4/4n3/K1k5/3p4/1R6/2P5/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Qb5#
    • 1...d3
      • 2.Rc3#
  • Tries
    • 1.Rb6?
      • threat
        • 2.Rc6#
        • 2.Qb5#
        • 2.Qc6#
      • 1...Sc7
        • 2.Rc6#
        • 2.Qc6#
      • 1...Sd8
        • 2.Qb5#
      • 1...d3
        • 2.Rc6#
      • 1...Kc4!
  • Keys
    • 1.c4!
      • threat
        • 2.Qd5#
      • 1...Kxc4
        • 2.Qb5#
      • 1...dxc4 ep
        • 2.Rxc3#
      • 1...Sf4
        • 2.Qc7#
      • 1...Sc7
        • 2.Qxc7#

FEATURES

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