MESON Chess Problem Database

Problem Display
PID: 109738 (5bn1/2B2p2/K4p2/P6b/pk2p3/2RP4/Prn1N3/3N4 w - - 0 1)

Youngs, Joe Casey

Northwest Chess, 1976

5bn1/2B2p2/K4p2/P6b/pk2p3/2RP4/Prn1N3/3N4

#2

8 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bd6
      • 2.Bxd6#
    • 1...Bh6
      • 2.Bd6#
    • 1...Bg7
      • 2.Bd6#
    • 1...Sa1
      • 2.a3#
    • 1...Se1
      • 2.a3#
    • 1...Se3
      • 2.a3#
    • 1...Sd4
      • 2.a3#
    • 1...Se7
      • 2.Bd6#
    • 1...a3
      • 2.Rc4#
  • Tries
    • 1.Sd4?
      • threat
        • 2.Sc6#
      • 1...Sxd4
        • 2.a3#
      • 1...Rb3
        • 2.Sxc2#
      • 1...a3
        • 2.Rc4#
      • 1...Se7
        • 2.Bd6#
      • 1...Bxd1!
    • 1.Sf4?
      • threat
        • 2.Sd5#
      • 1...a3
        • 2.Rc4#
      • 1...Se3
        • 2.a3#
      • 1...Se7
        • 2.Bd6#
      • 1...Rb3!
  • Keys
    • 1.Se3!
      • threat
        • 2.Sd5#
      • 1...Sxe3
        • 2.a3#
      • 1...Rb3
        • 2.Sxc2#
      • 1...a3
        • 2.Rc4#
      • 1...Se7
        • 2.Bd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • B(i);N_GUARD::B(H),XB(i)
    • B(i);N_GUARD::B(H)
    • S(b);N_GUARD::P(B)
    • S(j);S_CUTB(i)::B(H)
    • P(c);SBLOCK::R1(D)
  • Tries
    • Try
      • S(C);
      • Threat
        • S(C)
      • Vars
        • S(b);N_GUARD,XS(C)::P(B)
        • R(a);N_GUARD::S(C),XS(b)
        • P(c);SBLOCK::R1(D)
        • S(j);S_CUTB(i)::B(H)
      • Refutation
        • B(f);XS(A)
    • Try
      • S(C);
      • Threat
        • S(C)
      • Vars
        • P(c);SBLOCK::R1(D)
        • S(b);N_GUARD::P(B)
        • S(j);S_CUTB(i)::B(H)
      • Refutation
        • R(a);
  • Actual
    • S(A);
    • Threat
      • S(A)
    • Vars
      • S(b);N_GUARD,XS(A)::P(B)
      • R(a);N_GUARD::S(A),XS(b)
      • P(c);SBLOCK::R1(D)
      • S(j);S_CUTB(i)::B(H)
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