MESON Chess Problem Database

Problem Display
PID: 194891 (4b1QB/3Pbr2/8/1Np2R2/PPk1K2p/Pq2R1p1/B2p1P2/1nnr4 w - - 0 1)

Fontana, Alessandro

4th HM., L'Italia Scacchistica, 1918

4b1QB/3Pbr2/8/1Np2R2/PPk1K2p/Pq2R1p1/B2p1P2/1nnr4

#2

12 + 12

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Bg5
      • 2.Sd6#
      • 2.Rxc5#
    • 1...Bd6
      • 2.Sxd6#
    • 1...Bf6
      • 2.Sd6#
      • 2.Rxc5#
    • 1...Bd8
      • 2.Sd6#
      • 2.Rxc5#
    • 1...Sc3+
      • 2.Rxc3#
    • 1...Se2
      • 2.Bxb3#
  • Tries
    • 1.dxe8Q?
      • threat
        • 2.Qexf7#
        • 2.Qgxf7#
      • 1...Sc3+
        • 2.Rxc3#
      • 1...Sxa3!
    • 1.dxe8S?
      • threat
        • 2.Qxf7#
      • 1...Sc3+
        • 2.Rxc3#
      • 1...Sxa3!
    • 1.dxe8B?
      • threat
        • 2.Bxf7#
        • 2.Qxf7#
      • 1...Sc3+
        • 2.Rxc3#
      • 1...Sxa3!
    • 1.dxe8R?
      • threat
        • 2.Qxf7#
      • 1...Sc3+
        • 2.Rxc3#
      • 1...Sxa3!
  • Keys
    • 1.Kf3!
      • threat
        • 2.Qg4#
      • 1...Bg5
        • 2.Sd6#
      • 1...Bd6
        • 2.Sxd6#
      • 1...Bf6
        • 2.Rxc5#
      • 1...Sc3
        • 2.Rxc3#
      • 1...Se2
        • 2.Bxb3#
      • 1...Sd3
        • 2.Re4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(j);N_GUARD::S(H),XB(j)
    • S(a);CHECK,N_GUARD::R1(D),XS(a)
    • S(b);N_GUARD::B(A),XQ(e)
  • Tries
    • Try
      • P(J);XB(l)
      • Threat
        • DUALS(2)
      • Vars
        • S(a);CHECK,N_GUARD::R1(D),XS(a)
      • Refutation
        • S(a);XP(C)
    • Try
      • P(J);XB(l)
      • Threat
        • QAB(K),XR(k)
      • Vars
        • S(a);CHECK,N_GUARD::R1(D),XS(a)
      • Refutation
        • S(a);XP(C)
    • Try
      • P(J);XB(l)
      • Threat
        • DUALS(2)
      • Vars
        • S(a);CHECK,N_GUARD::R1(D),XS(a)
      • Refutation
        • S(a);XP(C)
    • Try
      • P(J);XB(l)
      • Threat
        • QAB(K),XR(k)
      • Vars
        • S(a);CHECK,N_GUARD::R1(D),XS(a)
      • Refutation
        • S(a);XP(C)
  • Actual
    • K(G);P_SPINR(D),S_FLIGHT
    • Threat
      • QAR(K)
    • Vars
      • B(j);N_GUARD::S(H)
      • B(j);N_GUARD::S(H),XB(j)
      • B(j);OGATE::R1(I),XP(i)
      • S(a);N_GUARD,N_PINR(D),P_PINR(I)::R1(D),XS(a)
      • S(b);N_GUARD::B(A),XQ(e)
      • S(b);N_PINR(D),P_PINR(I),SBLOCK::R(D)
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