MESON Chess Problem Database

Problem Display
PID: 54112 (B7/b1p2R2/r1p2B2/1p4P1/p2Rp3/Qb3k1P/4N3/2N3K1 w - - 0 1)

Ellerman, Arnoldo

Chess, 1943

B7/b1p2R2/r1p2B2/1p4P1/p2Rp3/Qb3k1P/4N3/2N3K1

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd4+
      • 2.Bxd4#
    • 1...e3
      • 2.Rf4#
    • 1...c5
      • 2.Rd3#
  • Tries
    • 1.Qxb3+?
      • 1...e3
        • 2.Be5#
        • 2.Be7#
        • 2.Bg7#
        • 2.Bd8#
        • 2.Bh8#
        • 2.Rf4#
      • 1...axb3!
  • Keys
    • 1.g6!
      • threat
        • 2.Bg5#
      • 1...Bxd4+
        • 2.Bxd4#
      • 1...Ke3
        • 2.Bg5#
      • 1...e3
        • 2.Rf4#
      • 1...c5
        • 2.Rd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • B(h);CHECK,OGATE,XR(F)::R(I)+B(H),XB(h)
    • P(d);N_PINR(F),N_SPINB(a),P_SPINP(g),SBLOCK::R1(F)
    • P(g);N_PINR(F),P_SPINP(d)::R(F)
  • Tries
    • Try
      • Q(D);CHECK,XB(a)
      • Refutation
        • P(c);XQ(D)
  • Actual
    • P(G);
    • Threat
      • R(I)+B(H)
    • Vars
      • B(h);CHECK,OGATE,XR(F)::R(I)+B(H),XB(h)
      • K(b);N_PINR(F),P-FLIGHT::B(H)
      • P(d);N_PINR(F),N_SPINB(a),P_SPINP(g),SBLOCK::R1(F)
      • P(g);N_PINR(F),P_SPINP(d)::R(F)
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