MESON Chess Problem Database

Problem Display
PID: 203345 (1nK3b1/1P2p3/8/Pp2NPN1/2pkB2Q/qnR2RB1/1p6/8 w - - 0 1)

Mari, Alberto

3rd Prize, L'Alfiere di Re, 1924

1nK3b1/1P2p3/8/Pp2NPN1/2pkB2Q/qnR2RB1/1p6/8

#2

11 + 9

5454 Near Snap 2020
6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qc5+
      • 2.Bc6#
    • 1...Be6+
      • 2.Sxe6#
    • 1...Bh7
      • 2.Se6#
  • Tries
    • 1.Sg6?
      • threat
        • 2.Bf2#
      • 1...Qc5+
        • 2.Bc6#
      • 1...Be6+
        • 2.Sxe6#
      • 1...Kc5!
    • 1.Sd7?
      • threat
        • 2.Bf2#
        • 2.Be5#
        • 2.Bc6#
      • 1...Qc5+
        • 2.Bc6#
      • 1...b1Q
        • 2.Bf2#
        • 2.Be5#
      • 1...b1B
        • 2.Bf2#
        • 2.Be5#
      • 1...Qd6
        • 2.Bf2#
      • 1...Bd5
        • 2.Bf2#
        • 2.Be5#
      • 1...Sd2
        • 2.Bf2#
        • 2.Be5#
      • 1...Sc5
        • 2.Bf2#
        • 2.Be5#
      • 1...Sc6
        • 2.Bf2#
        • 2.Bxc6#
      • 1...e5
        • 2.Bf2#
        • 2.Bxe5#
      • 1...Sxd7!
    • 1.Bh2?
      • threat
        • 2.Qf2#
      • 1...Qc5+
        • 2.Bc6#
      • 1...Be6+
        • 2.Sxe6#
      • 1...Kc5!
    • 1.Qf4?
      • threat
        • 2.Bf2#
        • 2.Qe3#
      • 1...Qc5+
        • 2.Bc6#
      • 1...Be6+
        • 2.Sxe6#
      • 1...Kc5!
  • Keys
    • 1.Qh8!
      • threat
        • 2.Bf2#
      • 1...Qc5+
        • 2.Sc6#
      • 1...Be6+
        • 2.Sd7#
      • 1...Kc5
        • 2.Sd3#

This anticipates 103272(1929)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • Q(b);CHECK,SBLOCK::QAR(E)+B(D)
    • B(i);CHECK,N_GUARD::S(I),XB(i)
    • B(i);N_GUARD::S(I)
  • Tries
    • Try
      • S(G);
      • Threat
        • B(C)
      • Vars
        • Q(b);CHECK,SBLOCK::QAR(E)+B(D)
        • B(i);CHECK,N_GUARD::S(I),XB(i)
      • Refutation
        • K(e);P_SPINP(d),S_FLIGHT
    • Try
      • S(G);
      • Threat
        • DUALS(3)
      • Vars
        • Q(b);CHECK::QAR(E)+B(D)
        • Q(b);::B(C)
      • Refutation
        • S(h);XS(G)
    • Try
      • B(C);
      • Threat
        • QAB(E)
      • Vars
        • Q(b);CHECK,SBLOCK::QAR(E)+B(D)
        • B(i);CHECK,N_GUARD::S(I),XB(i)
      • Refutation
        • K(e);P_SPINP(d),S_FLIGHT
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);CHECK,SBLOCK::QAR(E)+B(D)
        • B(i);CHECK,N_GUARD::S(I),XB(i)
      • Refutation
        • K(e);P_SPINP(d),S_FLIGHT
  • Actual
    • Q(E);
    • Threat
      • B(C)
    • Vars
      • Q(b);CHECK,SBLOCK::QAB(E)+S(G),DCHECK
      • B(i);CHECK,S_CUTP(g)::QAB(E)+S(G)
      • K(e);P_SPINP(d),S_FLIGHT::S(G)
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