MESON Chess Problem Database

Problem Display
PID: 6237 (2B1br2/K1Pn2B1/NpPk2pR/5q2/2PN1n2/4Q3/8/8 w - - 0 1)

Mari, Alberto

2nd Originality Prize, Chess Amateur (The) (Valve Ty.), 1928

2B1br2/K1Pn2B1/NpPk2pR/5q2/2PN1n2/4Q3/8/8

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Se5
      • 2.Qa3#
    • 1...Sf6
      • 2.Bxf8#
    • 1...Sb8
      • 2.cxb8Q#
      • 2.cxb8B#
  • Tries
    • 1.Sb5+?
      • 1...Kxc6
        • 2.Sb4#
        • 2.Bb7#
      • 1...Qxb5!
    • 1.Sxf5+?
      • 1...Kxc6
        • 2.Bb7#
      • 1...Rxf5!
    • 1.Bxd7?
      • threat
        • 2.c8S#
      • 1...Qxd7
        • 2.Qa3#
        • 2.Qe5#
      • 1...Bf7
        • 2.Sxf5#
        • 2.Bxf8#
      • 1...Bxd7!
  • Keys
    • 1.Bb7!
      • threat
        • 2.c8S#
      • 1...Se5
        • 2.Qa3#
      • 1...Bf7
        • 2.Sxf5#
      • 1...Sc5
        • 2.Sb5#
      • 1...Sf6
        • 2.Bxf8#
      • 1...Sb8
        • 2.cxb8Q#
        • 2.cxb8B#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(f);N_GUARD,S_CUTQ(b)::QAB(A)
    • S(f);N_GUARD,N_SPINP(e),S_CUTQ(b)::B(I),XR(h)
    • S(f);OGATE::PXS(f)=Q
  • Tries
    • Try
      • S(C);CHECK
      • Refutation
        • Q(b);XS(C)
    • Try
      • S(C);CHECK,XQ(b)
      • Vars
        • K(d);P-FLIGHT,XP(E)::B(J)
      • Refutation
        • R(h);XS(C)
    • Try
      • B(J);XS(f)
      • Threat
        • P=S
      • Refutation
        • B(g);XB(J)
  • Actual
    • B(J);
    • Threat
      • P=S
    • Vars
      • S(f);N_GUARD,S_CUTQ(b)::QAB(A)
      • B(g);S_CUTR(h)::S(C),XQ(b)
      • S(f);S_CUTQ(b)::S(C)
      • S(f);N_GUARD,N_SPINP(e),S_CUTQ(b)::B(I),XR(h)
      • S(f);OGATE::PXS(f)=Q
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