MESON Chess Problem Database

Problem Display
PID: 7473 (8/8/3K4/4p3/3k4/4R2Q/nR4n1/8 w - - 0 1)

di Vincenzi, Renato

Unpublished, 1990

8/8/3K4/4p3/3k4/4R2Q/nR4n1/8

#2

4 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Re4#
    • 1...Sc1
      • 2.Rb4#
    • 1...Sc3
      • 2.Rb4#
    • 1...Sb4
      • 2.Rxb4#
  • Tries
    • 1.Rd3+?
      • 1...Ke4
        • 2.Qf3#
      • 1...Kc4!
    • 1.Qf3?
      • threat
        • 2.Re4#
        • 2.Qe4#
      • 1...Kc4
        • 2.Re4#
        • 2.Qe4#
        • 2.Qd5#
      • 1...Sc3
        • 2.Rb4#
      • 1...e4
        • 2.Rxe4#
        • 2.Qxe4#
      • 1...Sxe3!
  • Keys
    • 1.Rc3!
      • threat
        • 2.Qd3#
      • 1...Ke4
        • 2.Rc4#
      • 1...Sxc3
        • 2.Rb4#
      • 1...Se3
        • 2.Qxe3#
      • 1...Se1
        • 2.Qe3#
      • 1...Sc1
        • 2.Rb4#
      • 1...Sb4
        • 2.Rxb4#
      • 1...Sf4
        • 2.Qe3#
      • 1...e4
        • 2.Rd2#
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • K(c);P-FLIGHT::R(B)
    • S(a);N_GUARD::R(A)
    • S(a);N_GUARD::R(A),XS(a)
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • K(c);P-FLIGHT::QAB1(C)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);N_GUARD::R(A)
      • Refutation
        • S(b);XR(B)
  • Actual
    • R(B);
    • Threat
      • QAR1(C)
    • Vars
      • K(c);P-FLIGHT::R(B)
      • S(a);N_GUARD,XR(B)::R(A)
      • S(b);N_GUARD::QAB1(C),XS(b)
      • S(b);N_GUARD::QAB1(C)
      • S(a);N_GUARD::R(A)
      • S(a);N_GUARD::R(A),XS(a)
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