MESON Chess Problem Database

Problem Display
PID: 138507 (3R3b/Q7/BK2N3/3N3b/pPP3r1/r2k1P2/2p1p3/2n1Bn2 w - - 0 1)

Ellerman, Arnoldo

L'Italia Scacchistica, 1926

3R3b/Q7/BK2N3/3N3b/pPP3r1/r2k1P2/2p1p3/2n1Bn2

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rg1
      • 2.c5#
    • 1...Rg2
      • 2.c5#
    • 1...Rg3
      • 2.c5#
    • 1...Rd4
      • 2.Sc5#
    • 1...Rg5
      • 2.c5#
    • 1...Rg6
      • 2.c5#
    • 1...Rg7
      • 2.c5#
    • 1...Rg8
      • 2.c5#
    • 1...Bd4+
      • 2.c5#
    • 1...Se3
      • 2.Sdf4#
  • Tries
    • 1.Ka5?
      • threat
        • 2.Sdf4#
      • 1...Rd4
        • 2.Sc5#
      • 1...Rf4
        • 2.Sdxf4#
        • 2.Sexf4#
      • 1...Rg5
        • 2.Sf4#
        • 2.c5#
      • 1...Bd4
        • 2.c5#
      • 1...Sd2
        • 2.Qe3#
      • 1...Sb3+!
    • 1.Qh7+?
      • 1...Re4
        • 2.Qxe4#
        • 2.c5#
      • 1...Rg6
        • 2.c5#
      • 1...Bg6!
  • Keys
    • 1.Kb7!
      • threat
        • 2.Sdf4#
      • 1...Rg7+
        • 2.Se7#
      • 1...Rd4
        • 2.Sc5#
      • 1...Rf4
        • 2.Sdxf4#
        • 2.Sexf4#
      • 1...Bd4
        • 2.c5#
      • 1...Sd2
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • R(h);N_GUARD::B(F)+P(D)
    • R(h);SBLOCK::S(H)
    • R(h);N_GUARD,P_PINS(H)::B(F)+P(D)
    • B(j);CHECK,S_CUTR(h)::B(F)+P(D)
    • S(b);SBLOCK::R(J)+S(E),DCHECK
  • Tries
    • Try
      • K(G);S_FLIGHT
      • Threat
        • R(J)+S(E),DCHECK
      • Vars
        • R(h);SBLOCK::S(H)
        • B(j);S_CUTR(h)::B(F)+P(D)
        • S(b);N_GUARD::QAR1(I)
      • Refutation
        • S(a);CHECK
    • Try
      • Q(I);CHECK
      • Vars
        • R(h);P_PINS(H),P_SPINR(h)::B(F)+P(D)
      • Refutation
        • B(i);P_SPINB(i)
  • Actual
    • K(G);P-FLIGHT
    • Threat
      • R(J)+S(E),DCHECK
    • Vars
      • R(h);CHECK,N_GUARD,S_CUTB(j)::R(J)+S(E)
      • R(h);SBLOCK::S(H)
      • B(j);S_CUTR(h)::B(F)+P(D)
      • S(b);N_GUARD::QAR1(I)
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Developed and maintained by Brian Stephenson.
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