MESON Chess Problem Database

Problem Display
PID: 7643 (r3k2r/6Rp/N2pK1n1/2p4B/3Q4/8/8/8 w qk - 0 1)

di Vincenzi, Renato

Unpublished, 1992

r3k2r/6Rp/N2pK1n1/2p4B/3Q4/8/8/8

#2

5 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rg8
      • 2.Rxg8#
    • 1...0-0-0
      • 2.Rc7#
  • Tries
    • 1.Sc7+?
      • 1...Kf8
        • 2.Qf6#
      • 1...Kd8!
    • 1.Re7+?
      • 1...Kf8
        • 2.Qg7#
      • 1...Kd8!
    • 1.Qf6?
      • threat
        • 2.Sc7#
        • 2.Qe7#
      • 1...Rxa6
        • 2.Qe7#
      • 1...Rc8
        • 2.Qe7#
      • 1...Ra7!
    • 1.Qa4+?
      • 1...Kd8
        • 2.Qd7#
      • 1...Kf8!
    • 1.Qxd6?
      • threat
        • 2.Sc7#
        • 2.Qe7#
      • 1...Ra7
        • 2.Qb8#
      • 1...Rc8
        • 2.Qe7#
      • 1...Rxa6!
  • Keys
    • 1.Ra7!
      • threat
        • 2.Rxa8#
        • 2.Qxh8#
      • 1...Kd8
        • 2.Rxa8#
      • 1...Kf8
        • 2.Rxa8#
      • 1...0-0
        • 2.Qg7#
      • 1...0-0-0
        • 2.Rc7#
      • 1...Rxa7
        • 2.Qxh8#
      • 1...cxd4
        • 2.Rxa8#
      • 1...Rb8
        • 2.Qxh8#
      • 1...Rc8
        • 2.Qxh8#
      • 1...Rd8
        • 2.Qxh8#
      • 1...Rf8
        • 2.Rxa8#
      • 1...Rg8
        • 2.Rxa8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • R(g);N_GUARD::R(E),XR(g)
    • K(f);0-0-0,N_SPINS(c),OGATEB::R1(E)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(f);N_SPINS(c),P-FLIGHT::QAR2(A)
      • Refutation
        • K(f);N_SPINS(c),P-FLIGHT,P_SPINP(b)
    • Try
      • R(E);CHECK
      • Vars
        • K(f);N_SPINS(c),P-FLIGHT::QAB1(A)
      • Refutation
        • K(f);N_SPINS(c),P-FLIGHT,P_SPINP(b)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(e);XS(C)::QAR1(A)
        • R(e);::QAR1(A)
      • Refutation
        • R(e);
    • Try
      • Q(A);CHECK
      • Vars
        • K(f);N_SPINS(c),P-FLIGHT::QAR1(A)
      • Refutation
        • K(f);N_SPINS(c),P-FLIGHT
    • Try
      • Q(A);XP(b)
      • Threat
        • DUALS(2)
      • Vars
        • R(e);N_GUARD::QAR(A)
        • R(e);::QAR1(A)
      • Refutation
        • R(e);P_PINQ(A),XS(C)
  • Actual
    • R(E);
    • Threat
      • DUALS(2)
    • Vars
      • K(f);N_SPINS(c),P-FLIGHT,P_SPINP(b)::R(E),XR(e)
      • K(f);N_SPINS(c),P-FLIGHT::R(E),XR(e)
      • K(f);0-0,N_SPINS(c),OGATEB::QAR1(A)
      • K(f);0-0-0,N_SPINS(c),OGATEB::R1(E)
      • R(e);XR(E)::QAR(A),XR(g)
      • P(a);XQ(A)::R(E),XR(e)
      • R(e);::QAR(A),XR(g)
      • R(e);SBLOCK::QAR(A),XR(g)
      • R(g);SBLOCK::R(E),XR(e)
      • R(g);::R(E),XR(e)
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