MESON Chess Problem Database

Problem Display
PID: 76652 (2Q5/1n1Np1p1/R1bnk3/7R/3pNP2/8/8/6KB w - - 0 1)

Gamage, Frederick

Frederick Gamage (Prcic), 2004

2Q5/1n1Np1p1/R1bnk3/7R/3pNP2/8/8/6KB

#2

8 + 7

3713 Snap 2008
5454 Near Snap 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Kf7
      • 2.Se5#
    • 1...Bd5
      • 2.Se5#
    • 1...Bxd7
      • 2.Qc4#
      • 2.Qg8#
    • 1...Sf7
      • 2.Sdc5#
      • 2.Sdf6#
      • 2.Sb8#
      • 2.Sf8#
  • Tries
    • 1.Qg8+?
      • 1...Sf7
        • 2.Sf8#
      • 1...Kxd7!
    • 1.f5+?
      • 1...Kd5
        • 2.Qxc6#
      • 1...Kf7
        • 2.Sg5#
        • 2.Se5#
        • 2.Qf8#
      • 1...Sxf5!
  • Keys
    • 1.Rd5!
      • threat
        • 2.Sg5#
      • 1...Kxd5
        • 2.Sb6#
      • 1...Kf7
        • 2.Se5#
      • 1...Bxd5
        • 2.Se5#
      • 1...Bxd7
        • 2.Qg8#
      • 1...Sxe4
        • 2.Qg8#
      • 1...Sf7
        • 2.Sdf6#
      • 1...g5
        • 2.Sxg5#

Anticipated by 21865(1921)

This anticipates 160003(2011)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(d);S_FLIGHT::S(G)
    • B(b);N_GUARD,P_SPINS(c),SBLOCK::QAB(H)+S(G)
  • Tries
    • Try
      • Q(H);CHECK
      • Vars
        • S(c);P_SPINB(b),P_SPINS(c)::S(G)
      • Refutation
        • K(d);S_FLIGHT,XS(G)
    • Try
      • P(D);CHECK
      • Vars
        • K(d);S_FLIGHT::QAB1(H),XB(b)
      • Refutation
        • S(c);P_SPINB(b),XP(D)
  • Actual
    • R(E);
    • Threat
      • S(C)
    • Vars
      • K(d);S_FLIGHT,XR(E)::S(G)
      • K(d);S_FLIGHT::S(G)
      • B(b);N_GUARD,P_SPINS(c),SBLOCK,XR(E)::QAB(H)+S(G)
      • B(b);P_SPINB(b),P_SPINS(c),SBLOCK,XS(G)::QAB(H)
      • S(c);N_GUARD,P_SPINB(b),XS(C)::QAB(H)
      • S(c);N_GUARD,P_SPINB(b),SBLOCK::QAB(H)+S(G)
      • P(g);::S(C),XP(g)
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