MESON Chess Problem Database

Problem Display
PID: 207059 (4Q3/8/4q1r1/3NkpP1/2R2p2/BK1R3r/1N4B1/8 w - - 0 1)

Beaubestre, Claude

Phenix, 1996

4Q3/8/4q1r1/3NkpP1/2R2p2/BK1R3r/1N4B1/8

#2

9 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd3+
      • 2.Sxd3#
  • Tries
    • 1.Sf6?
      • threat
        • 2.Sd7#
        • 2.Bd6#
      • 1...Rxd3+
        • 2.Sxd3#
      • 1...Rxg5
        • 2.Sd7#
      • 1...Rxf6
        • 2.Bd6#
      • 1...Qe7
        • 2.Qxe7#
      • 1...Rh7
        • 2.Bd6#
        • 2.Rd5#
      • 1...Rg7
        • 2.Bd6#
      • 1...Qxe8!
    • 1.Re3+?
      • 1...fxe3
        • 2.Sd3#
      • 1...Rxe3+!
    • 1.Qe7?
      • threat
        • 2.Bd6#
      • 1...Rxd3+
        • 2.Sxd3#
      • 1...Qxe7!
  • Keys
    • 1.Sc7!
      • threat
        • 2.Bd6#
      • 1...Rxd3+
        • 2.Sxd3#
      • 1...Qxe8
        • 2.Rc5#
      • 1...Rxg5
        • 2.Qxe6#
      • 1...Qe7
        • 2.Rc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(a);CHECK,XR(E)::S(A),XR(a)
  • Tries
    • Try
      • S(G);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);CHECK,P_PINR(F),XR(E)::S(A),XR(a)
        • R(f);XP(H)::S(G)
        • R(f);XS(G)::B(C)
        • Q(e);OGATEB::QAR2(I),XQ(e)
        • R(f);::B(C)
      • Refutation
        • Q(e);N_SPINQ(e),XQ(I)
    • Try
      • R(E);CHECK
      • Vars
        • P(b);XR(E)::S(A)
      • Refutation
        • R(a);CHECK,XR(E)
    • Try
      • Q(I);
      • Threat
        • B(C)
      • Vars
        • R(a);CHECK,XR(E)::S(A),XR(a)
      • Refutation
        • Q(e);N_SPINQ(e),XQ(I)
  • Actual
    • S(G);
    • Threat
      • B(C)
    • Vars
      • R(a);CHECK,P_PINR(F),XR(E)::S(A),XR(a)
      • Q(e);N_SPINQ(e),OGATE,XQ(I)::R(F)
      • R(f);N_GUARD,XP(H)::QAR1(I),XQ(e)
      • Q(e);OGATE::R(F)
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