MESON Chess Problem Database

Problem Display
PID: 254849 (B4R1q/7p/1PR2n2/1Qb1N1pN/2bPk1P1/1rn4P/1BPP4/4K3 w - - 0 1)

Ellerman, Arnoldo

Probleemblad, 1946

B4R1q/7p/1PR2n2/1Qb1N1pN/2bPk1P1/1rn4P/1BPP4/4K3

#2

14 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Bd5
      • 2.Qd3#
  • Tries
    • 1.Sg3+?
      • 1...Kxd4
        • 2.Qxc5#
      • 1...Kd5
        • 2.Qxc4#
        • 2.Qxc5#
      • 1...Kf4!
    • 1.Rcxf6+?
      • 1...Kxd4
        • 2.Sf3#
      • 1...Bd5
        • 2.Qd3#
      • 1...Sd5!
  • Keys
    • 1.Sf3!
      • threat
        • 2.Re6#
      • 1...Kxf3
        • 2.Rcxf6#
      • 1...Kd5
        • 2.Rcxf6#
      • 1...Bd5
        • 2.Qd3#
      • 1...Be6
        • 2.Rxe6#
      • 1...Bd6
        • 2.Qf5#
      • 1...Scd5
        • 2.Sxg5#
      • 1...Sfd5
        • 2.Sg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • B(c);OGATE,SBLOCK::QAB1(H)
  • Tries
    • Try
      • S(J);CHECK
      • Vars
        • K(d);N_GUARD,P-FLIGHT,P_SPINS(b),XP(F)::QAB1(H),XB(e)
      • Refutation
        • K(d);P-FLIGHT,P_SPINS(g)
    • Try
      • R(L);CHECK,XS(g)
      • Vars
        • K(d);P-FLIGHT,P_SPINS(b),S_CUTB(c),XP(F)::S(I)
        • B(c);OGATE,P_SPINB(c)::QAB1(H)
      • Refutation
        • S(b);P_SPINS(b)
  • Actual
    • S(I);
    • Threat
      • B(M)+R(L),DCHECK
    • Vars
      • K(d);P_SPINS(g),S_FLIGHT,XS(I)::B(M)+R(L),DCHECK,XS(g)
      • K(d);P_SPINB(e),S_CUTB(c),S_CUTS(b),S_FLIGHT::B(M)+R(L),XS(g)
      • B(c);OGATE,SBLOCK::QAB1(H)
      • B(c);::B(M)+R(L),DCHECK,XB(c)
      • B(e);OGATE::QAB1(H)
      • S(b);SBLOCK::S(I),XP(f)
      • S(g);SBLOCK::S(J)
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