MESON Chess Problem Database

Problem Display
PID: 47374 (1Nn5/7B/K2pp3/2pkpP1p/RbN1p1pR/2P5/1Q1PP1n1/6B1 w - - 0 1)

Howard, David M

Problem Observer, 2003

1Nn5/7B/K2pp3/2pkpP1p/RbN1p1pR/2P5/1Q1PP1n1/6B1

#2

12 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc4
      • 2.Qa2#
    • 1...Ba3
      • 2.Qb7#
    • 1...Bxc3
      • 2.Qb7#
    • 1...Ba5
      • 2.Qb7#
    • 1...Se1
      • 2.Se3#
    • 1...Se3
      • 2.Sxe3#
    • 1...Sf4
      • 2.Se3#
    • 1...Sxh4
      • 2.Se3#
    • 1...Sb6
      • 2.Sxb6#
    • 1...Sa7
      • 2.Sb6#
    • 1...Se7
      • 2.Sb6#
    • 1...exf5
      • 2.Bg8#
  • Tries
    • 1.Bg8?
      • threat
        • 2.Bxe6#
      • 1...Kxc4
        • 2.Qa2#
      • 1...Sf4
        • 2.Se3#
      • 1...e3!
    • 1.Qa2?
      • threat
        • 2.Se3#
        • 2.Sb6#
      • 1...Se3
        • 2.Sxe3#
        • 2.Sb6#
      • 1...Sb6
        • 2.Se3#
        • 2.Sxb6#
      • 1...e3!
    • 1.Qb3?
      • threat
        • 2.Se3#
        • 2.Sb6#
      • 1...Se3
        • 2.Sxe3#
        • 2.Sb6#
      • 1...Sb6
        • 2.Se3#
        • 2.Sxb6#
      • 1...e3!
    • 1.Qxb4?
      • threat
        • 2.Qb7#
      • 1...exf5
        • 2.Bg8#
      • 1...Sb6
        • 2.Sxb6#
      • 1...Sa7
        • 2.Sb6#
      • 1...Se7
        • 2.Sb6#
      • 1...cxb4!
  • Keys
    • 1.Qb1!
      • 1...Kxc4
        • 2.Qa2#
      • 1...Bxc3
        • 2.Qb7#
      • 1...Sxh4
        • 2.Se3#
      • 1...exf5
        • 2.Bg8#
      • 1...g3
        • 2.Qxe4#
      • 1...Ba3
        • 2.Qb7#
      • 1...Ba5
        • 2.Qb7#
      • 1...Se1
        • 2.Se3#
      • 1...Se3
        • 2.Sxe3#
      • 1...Sf4
        • 2.Se3#
      • 1...Sb6
        • 2.Sxb6#
      • 1...Sa7
        • 2.Sb6#
      • 1...Se7
        • 2.Sb6#
      • 1...e3
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(f);OGATEB,P_SPINB(b),S_FLIGHT,XS(G)::QAB(B)
    • B(b);OGATE::QAB(B)
    • B(b);OGATE,XP(E)::QAB(B)
    • S(a);N_GUARD::S(G)
    • S(a);N_GUARD::S(G),XS(a)
    • S(a);N_GUARD,XR(H)::S(G)
    • S(k);N_GUARD::S(G),XS(k)
    • S(k);N_GUARD::S(G)
    • P(j);OGATEB,XP(I)::B(K)
  • Tries
    • Try
      • B(K);P_PINP(j)
      • Threat
        • B(K),XP(j)
      • Vars
        • K(f);OGATEB,P_SPINB(b),S_FLIGHT,XS(G)::QAB(B)
        • S(a);N_GUARD::S(G)
      • Refutation
        • P(c);
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Refutation
        • P(c);
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Refutation
        • P(c);
    • Try
      • Q(B);XB(b)
      • Threat
        • QAB(B)
      • Vars
        • P(j);OGATEB,XP(I)::B(K)
        • S(k);N_GUARD::S(G),XS(k)
        • S(k);N_GUARD::S(G)
      • Refutation
        • P(e);XQ(B)
  • Actual
    • Q(B);
    • Vars
      • K(f);OGATEB,P_SPINB(b),S_FLIGHT,XS(G)::QAB(B)
      • B(b);OGATE,XP(E)::QAB(B)
      • S(a);N_GUARD,XR(H)::S(G)
      • P(j);OGATEB,XP(I)::B(K)
      • P(d);::QAB1(B),XP(c)
      • B(b);OGATE::QAB(B)
      • S(a);N_GUARD::S(G)
      • S(a);N_GUARD::S(G),XS(a)
      • S(k);N_GUARD::S(G),XS(k)
      • S(k);N_GUARD::S(G)
      • P(c);N_GUARD::QAR2(B)
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