MESON Chess Problem Database

Problem Display
PID: 107596 (1b3n2/1p2NK2/pp2N3/1P2kp2/2P2R2/BR1b4/3P1n2/8 w - - 0 1)

Armeni, Alberto

Canadian Chess Championship, 1981

1b3n2/1p2NK2/pp2N3/1P2kp2/2P2R2/BR1b4/3P1n2/8

#2

9 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.d4#
    • 1...Bf1
      • 2.d4#
    • 1...Bc2
      • 2.d4#
    • 1...Be2
      • 2.d4#
    • 1...Bxc4
      • 2.d4#
    • 1...Be4
      • 2.d4#
    • 1...Bd6
      • 2.Bb2#
    • 1...Se4
      • 2.Rxf5#
    • 1...Sxe6
      • 2.Sg6#
    • 1...Sg6
      • 2.Sxg6#
    • 1...Sd7
      • 2.Sg6#
    • 1...Sh7
      • 2.Sg6#
    • 1...axb5
      • 2.Rxb5#
  • Tries
    • 1.Rxd3?
      • threat
        • 2.Bb2#
        • 2.Rd5#
      • 1...Sxe6
        • 2.Sg6#
      • 1...Sd1
        • 2.Rd5#
      • 1...Se4
        • 2.Rd5#
        • 2.Rxf5#
      • 1...Sxd3!
  • Keys
    • 1.bxa6!
      • threat
        • 2.Rb5#
      • 1...Bxc4
        • 2.d4#
      • 1...Sxe6
        • 2.Sg6#
      • 1...bxa6
        • 2.Sc6#
      • 1...Be4
        • 2.d4#
      • 1...Bd6
        • 2.Bb2#
      • 1...Se4
        • 2.Rxf5#
      • 1...Sd7
        • 2.Sg6#
      • 1...b5
        • 2.Rxb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • B(b);OGATE::P(A)
    • B(b);OGATE,P_PINS(G),XP(D)::P(A)
    • B(h);SBLOCK::B(B)
    • S(a);SBLOCK,S_CUTB(b)::R1(E),XP(d)
    • S(i);N_GUARD,XS(G)::S(H)
    • S(i);N_GUARD::S(H),XS(i)
    • S(i);N_GUARD::S(H)
    • P(e);OGATE,XP(F)::R(C),XP(e)
  • Tries
    • Try
      • R(C);XB(b)
      • Threat
        • DUALS(2)
      • Vars
        • S(i);N_GUARD,XS(G)::S(H)
        • S(a);::R1(C)
      • Refutation
        • S(a);XR(C)
  • Actual
    • P(F);XP(e)
    • Threat
      • R(C)
    • Vars
      • B(b);OGATE,P_PINS(G),XP(D)::P(A)
      • S(i);N_GUARD,XS(G)::S(H)
      • P(g);N_GUARD,XP(F)::S(H)
      • B(b);OGATE::P(A)
      • B(h);SBLOCK::B(B)
      • S(a);SBLOCK,S_CUTB(b)::R1(E),XP(d)
      • S(i);N_GUARD::S(H)
      • P(f);::R(C),XP(f)
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