MESON Chess Problem Database

Problem Display
PID: 36636 (7b/5p1r/p2p3p/NkP4K/RB6/7p/1R2r3/3BnQn1 w - - 0 1)

Ellerman, Arnoldo

1st Prize, American Chess Bulletin, 1951

7b/5p1r/p2p3p/NkP4K/RB6/7p/1R2r3/3BnQn1

#2

8 + 11

3105 FIDE Album (1945-1955) 1964
56 The Problemist 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Rg7
      • 2.Ba3#
    • 1...dxc5
      • 2.Bc3#
    • 1...f6
      • 2.Ba3#
  • Tries
    • 1.Qxe2+?
      • 1...Sd3
        • 2.Qxd3#
        • 2.Qe8#
      • 1...Sxe2!
  • Keys
    • 1.Qf5!
      • threat
        • 2.Qd7#
      • 1...dxc5
        • 2.Qxc5#
      • 1...Re5
        • 2.Ba3#
      • 1...Re6
        • 2.Bc3#
      • 1...Re7
        • 2.Bc3#
      • 1...f6
        • 2.Bd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(j);S_CUTB(k)::R(C)+B(E)
    • P(g);SBLOCK,XP(G)::R(C)+B(E)
    • P(i);S_CUTB(k)::R(C)+B(E)
  • Tries
    • Try
      • Q(B);CHECK,XR(c)
      • Refutation
        • S(b);XQ(B)
  • Actual
    • Q(B);N_PINR(c)
    • Threat
      • QAB(B)
    • Vars
      • P(g);OGATE,P_SPINP(g),XP(G)::QAR1(B),XP(g)
      • R(c);N_GUARD,P_PINQ(B),S_CUTB(k)::R(C)+B(E)
      • R(c);N_GUARD::R(C)+B(E)
      • P(i);S_CUTB(k)::R(C)+B(E)
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