MESON Chess Problem Database

Problem Display
PID: 261444 (4n2K/4B3/1n1r1Pp1/2P1kP2/1N2p1bN/4Qp1p/B4p1q/8 w - - 0 1)

Somma, Francesco

L'Echiquier, 1927

4n2K/4B3/1n1r1Pp1/2P1kP2/1N2p1bN/4Qp1p/B4p1q/8

#2

9 + 11

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rd1
      • 2.Sc6#
    • 1...Rd2
      • 2.Sc6#
    • 1...Rd3
      • 2.Sxd3#
      • 2.Sc6#
    • 1...Rd4
      • 2.Sc6#
    • 1...Rd5
      • 2.Sc6#
    • 1...Rc6
      • 2.Sd3#
      • 2.Sxc6#
    • 1...Re6
      • 2.Sd3#
    • 1...Rxf6
      • 2.Sd3#
    • 1...Rd7
      • 2.Sc6#
    • 1...Rd8
      • 2.Sc6#
    • 1...Bxf5
      • 2.Sxf3#
    • 1...Sd5
      • 2.Sd3#
    • 1...Sxf6
      • 2.Bxd6#
    • 1...gxf5
      • 2.Sg6#
  • Tries
    • 1.Sxf3+?
      • 1...Kxf5
        • 2.Qg5#
      • 1...Bxf3!
    • 1.cxd6?
      • threat
        • 2.Sd3#
        • 2.Sc6#
      • 1...f1Q
        • 2.Sc6#
      • 1...f1B
        • 2.Sc6#
      • 1...Sc4!
  • Keys
    • 1.Bd5!
      • threat
        • 2.Qxe4#
      • 1...Rxd5
        • 2.Sc6#
      • 1...Bxf5
        • 2.Sxf3#
      • 1...Sxd5
        • 2.Sd3#
      • 1...Sxf6
        • 2.Bxd6#
      • 1...gxf5
        • 2.Sg6#
      • 1...Qf4
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • R(i);N_GUARD::S(C)
    • R(i);N_GUARD,XP(G)::S(C)
    • B(f);N_GUARD,SBLOCK,XP(F)::S(D),XP(c)
    • S(h);S_CUTR(i)::S(C)
    • S(k);N_GUARD,SBLOCK,XP(G)::B(H),XR(i)
    • P(j);SBLOCK,XP(F)::S(D)
  • Tries
    • Try
      • S(D);CHECK,XP(c)
      • Vars
        • K(g);N_SPINP(e),P-FLIGHT,S_CUTB(f),S_CUTP(e),XP(F)::QAR1(B)
      • Refutation
        • B(f);XS(D)
    • Try
      • P(E);XR(i)
      • Threat
        • DUALS(2)
      • Vars
        • P(a);::S(C)
      • Refutation
        • S(h);
  • Actual
    • B(A);
    • Threat
      • QAR1(B),XP(e)
    • Vars
      • R(i);N_GUARD,SBLOCK,XB(A)::S(C)
      • B(f);N_GUARD,SBLOCK,XP(F)::S(D),XP(c)
      • S(h);SBLOCK,XB(A)::S(C)
      • S(k);N_GUARD,SBLOCK,XP(G)::B(H),XR(i)
      • P(j);SBLOCK,XP(F)::S(D)
      • Q(b);SBLOCK::QAB(B)
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