MESON Chess Problem Database

Problem Display
PID: 76401 (b7/1Q1p4/1b1p3K/5k1N/qp1n2pp/2B5/B7/4RN2 w - - 0 1)

Gamage, Frederick

Frederick Gamage (Prcic), 2004

b7/1Q1p4/1b1p3K/5k1N/qp1n2pp/2B5/B7/4RN2

#2

7 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Sb3
      • 2.Bb1#
    • 1...Sb5
      • 2.Qxd7#
    • 1...Sc6
      • 2.Qxd7#
    • 1...h3
      • 2.Sfg3#
  • Tries
    • 1.Sg7+?
      • 1...Kf4
        • 2.Bd2#
      • 1...Kf6!
    • 1.Be6+?
      • 1...dxe6
        • 2.Qf7#
        • 2.Qh7#
      • 1...Sxe6!
    • 1.Re5+?
      • 1...dxe5
        • 2.Se3#
      • 1...Kxe5!
    • 1.Re8?
      • threat
        • 2.Se3#
      • 1...Se2
        • 2.Rf8#
      • 1...Sc2
        • 2.Rf8#
      • 1...Sb3
        • 2.Bb1#
      • 1...Sf3
        • 2.Rf8#
      • 1...Sb5
        • 2.Rf8#
        • 2.Qxd7#
      • 1...Sc6
        • 2.Qxd7#
      • 1...Se6!
    • 1.Qxa8?
      • threat
        • 2.Qe4#
        • 2.Qd5#
        • 2.Qf8#
      • 1...Qxa2
        • 2.Qe4#
      • 1...g3
        • 2.Qe4#
      • 1...Se2
        • 2.Qd5#
      • 1...Qc2
        • 2.Qd5#
        • 2.Qf8#
      • 1...Qb3
        • 2.Qe4#
      • 1...Qb5
        • 2.Qe4#
        • 2.Qf8#
      • 1...Qc6
        • 2.Qf8#
      • 1...Qa5
        • 2.Qe4#
        • 2.Qf8#
      • 1...Bd8
        • 2.Qe4#
        • 2.Qd5#
      • 1...Sf3
        • 2.Qe4#
        • 2.Qf8#
      • 1...Sc6
        • 2.Qf8#
      • 1...Se6
        • 2.Qe4#
        • 2.Qd5#
      • 1...d5
        • 2.Qxd5#
        • 2.Qf8#
      • 1...Qxa8!
    • 1.Qxd7+?
      • 1...Se6
        • 2.Bxe6#
        • 2.Qxe6#
        • 2.Qf7#
        • 2.Qh7#
      • 1...Qxd7!
  • Keys
    • 1.Re7!
      • threat
        • 2.Se3#
      • 1...Se2
        • 2.Rf7#
      • 1...Sc2
        • 2.Rf7#
      • 1...Sb3
        • 2.Bb1#
      • 1...Sf3
        • 2.Rf7#
      • 1...Sb5
        • 2.Rf7#
        • 2.Qxd7#
      • 1...Sc6
        • 2.Qxd7#
      • 1...Se6
        • 2.Rf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • S(c);N_GUARD,S_CUTQ(a)::B(C)
    • S(c);N_GUARD,S_CUTQ(a)::QAB(G),XP(i)
    • P(e);N_GUARD::S(B)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(f);P-FLIGHT::B(D)
      • Refutation
        • K(f);P-FLIGHT,P_SPINS(c)
    • Try
      • B(C);CHECK
      • Refutation
        • S(c);XB(C)
    • Try
      • R(A);CHECK
      • Vars
        • P(h);SBLOCK,XR(A)::S(B)
      • Refutation
        • K(f);P-FLIGHT,P_SPINS(c),XR(A)
    • Try
      • R(A);
      • Threat
        • S(B)
      • Vars
        • S(c);::R(A)
        • S(c);N_GUARD,S_CUTQ(a)::B(C)
        • S(c);N_GUARD,S_CUTQ(a)::QAB(G),XP(i)
      • Refutation
        • S(c);
    • Try
      • Q(G);XB(j)
      • Threat
        • DUALS(3)
      • Vars
        • Q(a);XB(C)::QAB1(G)
        • P(d);::QAB1(G)
        • S(c);::QAR2(G)
        • Q(a);::QAB1(G)
        • Q(a);::QAR(G)
        • S(c);::QAR(G)
      • Refutation
        • Q(a);XQ(G)
    • Try
      • Q(G);CHECK,XP(i)
      • Refutation
        • Q(a);XQ(G)
  • Actual
    • R(A);
    • Threat
      • S(B)
    • Vars
      • S(c);::R(A)
      • S(c);N_GUARD,S_CUTQ(a)::B(C)
      • S(c);N_GUARD,S_CUTQ(a)::QAB(G),XP(i)
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