MESON Chess Problem Database

Problem Display
PID: 83499 (b7/3Qp3/2Pq3B/1n6/4R3/1P1k1B1R/Npp1pPK1/4b3 w - - 0 1)

Ellerman, Arnoldo

Densmore MT (Pittsburgh Gazette-Times), 1918

b7/3Qp3/2Pq3B/1n6/4R3/1P1k1B1R/Npp1pPK1/4b3

#2

10 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sc3
      • 2.Sb4#
  • Tries
    • 1.Reh4?
      • threat
        • 2.Bh5#
        • 2.Qf5#
      • 1...Bxf2
        • 2.Qf5#
      • 1...Bxc6
        • 2.Bxc6#
      • 1...c1Q
        • 2.Qf5#
      • 1...c1S
        • 2.Qf5#
      • 1...c1B
        • 2.Qf5#
      • 1...c1R
        • 2.Qf5#
      • 1...Qd4
        • 2.Be4#
        • 2.Bh5#
      • 1...Qd5
        • 2.Bxd5#
      • 1...Bd2
        • 2.Qf5#
      • 1...Sc3
        • 2.Sb4#
        • 2.Bh5#
      • 1...Sd4
        • 2.Be4#
      • 1...e5
        • 2.Bd5#
        • 2.Bh5#
      • 1...e6
        • 2.Bh5#
        • 2.Qh7#
      • 1...Qxd7!
  • Keys
    • 1.Rg4!
      • threat
        • 2.Qf5#
      • 1...Qxd7
        • 2.Bd5#
      • 1...Bxc6
        • 2.Bxc6#
      • 1...Qd4
        • 2.Be4#
      • 1...Qd5
        • 2.Bxd5#
      • 1...Sc3
        • 2.Sb4#
      • 1...Sd4
        • 2.Be4#
      • 1...e5
        • 2.Bd5#
      • 1...e6
        • 2.Qh7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • S(f);SBLOCK,S_CUTB(a)::S(A)
  • Tries
    • Try
      • R(G);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);XP(B)::QAB(J)
        • B(i);OGATE,P_PINB(E),XP(H)::R(F)+B(E),XB(i)
        • P(c);::QAB(J)
        • Q(g);N_GUARD,P_PINB(E)::R(F)+B(E),XQ(g)
        • B(a);::QAB(J)
        • S(f);N_SPINQ(g),SBLOCK::R(F)+B(E),DCHECK
      • Refutation
        • Q(g);N_SPINQ(g),XQ(J)
  • Actual
    • R(G);
    • Threat
      • QAB(J)
    • Vars
      • Q(g);N_GUARD,N_SPINQ(g),XQ(J)::R(F)+B(E)
      • B(i);OGATE,P_PINB(E),XP(H)::R(F)+B(E),XB(i)
      • Q(g);::R(F)+B(E),DCHECK
      • Q(g);N_GUARD,P_PINB(E)::R(F)+B(E),XQ(g)
      • S(f);SBLOCK,S_CUTB(a)::S(A)
      • S(f);N_SPINQ(g),SBLOCK::R(F)+B(E),DCHECK
      • P(h);::R(F)+B(E)
      • P(h);OGATE::QAB(J)
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