MESON Chess Problem Database

Problem Display
PID: 109900 (B1b3R1/KnNP1p2/1B1k4/2N4q/2P1r3/8/4R2b/7Q w - - 0 1)

Tavares Bastos, C

Caissa, 1980

B1b3R1/KnNP1p2/1B1k4/2N4q/2P1r3/8/4R2b/7Q

#2

10 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc4
      • 2.Sb5#
      • 2.Se8#
      • 2.dxc8S#
    • 1...Rd4
      • 2.Sb5#
      • 2.Se8#
      • 2.dxc8S#
    • 1...Rf4
      • 2.Sb5#
      • 2.Se8#
      • 2.dxc8S#
    • 1...Rg4
      • 2.Sb5#
      • 2.Se8#
      • 2.dxc8S#
    • 1...Rh4
      • 2.Sb5#
      • 2.Se8#
      • 2.dxc8S#
    • 1...Re5
      • 2.dxc8S#
    • 1...Re6
      • 2.dxc8S#
    • 1...Re7
      • 2.Sb5#
      • 2.dxc8S#
    • 1...Re8
      • 2.Sb5#
      • 2.Sxe8#
      • 2.dxe8S#
  • Tries
    • 1.Qxe4?
      • threat
        • 2.Sb5#
        • 2.Se8#
        • 2.dxc8S#
      • 1...Bxd7
        • 2.Sxb7#
      • 1...Sxc5
        • 2.Qc6#
        • 2.Qe7#
      • 1...Qd5
        • 2.Qxd5#
      • 1...Qe5
        • 2.dxc8S#
      • 1...Be5
        • 2.dxc8S#
      • 1...Qg4
        • 2.Sb5#
        • 2.Se8#
        • 2.Rd2#
        • 2.Qd5#
      • 1...Qh3
        • 2.Sb5#
        • 2.Se8#
        • 2.Qd5#
      • 1...Qf5
        • 2.Sb5#
        • 2.Se8#
      • 1...f5
        • 2.Sb5#
        • 2.Rd2#
        • 2.Qd5#
        • 2.Qe6#
        • 2.dxc8S#
      • 1...f6
        • 2.Sb5#
        • 2.Qe6#
        • 2.dxc8S#
      • 1...Qxc5!
    • 1.dxc8S+?
      • 1...Kc6
        • 2.Bxb7#
      • 1...Ke5!
  • Keys
    • 1.Se8+!
      • 1...Ke5
        • 2.Qxe4#
      • 1...Kc6
        • 2.d8S#
      • 1...Ke7
        • 2.dxc8S#
      • 1...Rxe8
        • 2.dxe8S#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • R(b);::PXB(g)=S
  • Tries
    • Try
      • Q(A);XR(b)
      • Threat
        • DUALS(3)
      • Vars
        • B(g);N_GUARD,SBLOCK,XP(H)::S(D),XS(e)
        • Q(c);N_GUARD::QAR1(A),XQ(c)
        • Q(c);::PXB(g)=S
        • B(a);::PXB(g)=S
      • Refutation
        • Q(c);P_PINB(E),XS(D)
    • Try
      • P(H);CHECK,XB(g)
      • Vars
        • K(d);P-FLIGHT,P_SPINR(b),P_SPINS(e)::B(I),XS(e)
      • Refutation
        • K(d);P_SPINR(b),S_FLIGHT
  • Actual
    • S(G);CHECK
    • Vars
      • K(d);P_SPINR(b),S_FLIGHT::QAR1(A),XR(b)
      • K(d);P-FLIGHT,P_SPINR(b),P_SPINS(e)::P=S
      • K(d);P_SPINR(b),S_FLIGHT::PXB(g)=S
      • R(b);OGATE,XS(G)::PXR(b)=S
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