MESON Chess Problem Database

Problem Display
PID: 83495 (3n4/1bq5/p2B2p1/3kN3/2NP4/1Q4KB/4R3/3Rn3 w - - 0 1)

Ellerman, Arnoldo

Tijdschrift vd NSB, 1917

3n4/1bq5/p2B2p1/3kN3/2NP4/1Q4KB/4R3/3Rn3

#2

9 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd6
      • 2.Sb2#
      • 2.Sa3#
      • 2.Sa5#
      • 2.Sb6#
    • 1...Sc2
      • 2.Qf3#
    • 1...Sg2
      • 2.Qf3#
    • 1...Sf3
      • 2.Qxf3#
  • Tries
    • 1.Se3+?
      • 1...Ke4
        • 2.Sf1#
        • 2.Sc2#
        • 2.Sg2#
        • 2.Sd5#
        • 2.Sf5#
      • 1...Kxd6!
    • 1.Bc5?
      • threat
        • 2.Sb2#
        • 2.Sd2#
        • 2.Sa3#
        • 2.Sa5#
        • 2.Sb6#
        • 2.Sd6#
      • 1...Qxe5+
        • 2.Sxe5#
      • 1...Qa5
        • 2.Sb2#
        • 2.Sd2#
        • 2.Sa3#
        • 2.Sxa5#
        • 2.Sb6#
        • 2.Sd6#
      • 1...Qb6
        • 2.Sxb6#
      • 1...Qd6
        • 2.Sb2#
        • 2.Sd2#
        • 2.Sa3#
        • 2.Sa5#
        • 2.Sb6#
        • 2.Sxd6#
      • 1...a5
        • 2.Sb2#
        • 2.Sd2#
        • 2.Sa3#
        • 2.Sxa5#
        • 2.Sb6#
        • 2.Sd6#
      • 1...Qxc5!
    • 1.Bxc7?
      • threat
        • 2.Sb2#
        • 2.Sa3#
        • 2.Sa5#
        • 2.Sb6#
        • 2.Sd6#
      • 1...a5
        • 2.Sb2#
        • 2.Sa3#
        • 2.Sxa5#
        • 2.Sb6#
        • 2.Sd6#
        • 2.Qb5#
      • 1...Sd3!
    • 1.Qb5+?
      • 1...Qc5
        • 2.Qxc5#
      • 1...axb5!
  • Keys
    • 1.Sc6!
      • threat
        • 2.Sb4#
      • 1...Qxd6+
        • 2.S4e5#
      • 1...Kxc6
        • 2.d5#
      • 1...Qxc6
        • 2.Re5#
      • 1...Bxc6
        • 2.Re5#
      • 1...Sxc6
        • 2.Be6#
      • 1...Qa5
        • 2.Se7#
      • 1...Qb6
        • 2.Se7#
      • 1...Sc2
        • 2.Bg2#
      • 1...Sd3
        • 2.Bg2#
      • 1...a5
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 9
    • REMOVED MATES = 2
  • Sets
    • S(a);N_GUARD::QAB(C)
    • S(a);N_GUARD::QAB(C),XS(a)
  • Tries
    • Try
      • S(F);CHECK
      • Refutation
        • K(b);P-FLIGHT,XB(I)
    • Try
      • B(I);P_SPINS(H)
      • Threat
        • DUALS(6)
      • Vars
        • Q(f);CHECK,XS(H)::QAB(C)+S(F),XQ(f)
        • Q(f);N_PINS(H)::QAB(C)+S(F),DCHECK,XQ(f)
      • Refutation
        • Q(f);N_PINS(H),XB(I)
    • Try
      • B(I);XQ(f)
      • Threat
        • DUALS(5)
      • Refutation
        • S(a);
    • Try
      • Q(C);CHECK
      • Vars
        • Q(f);N_GUARD,P_SPINQ(f)::QAR1(C),XQ(f)
      • Refutation
        • P(c);XQ(C)
  • Actual
    • S(H);P_SPINB(I)
    • Threat
      • S(H)
    • Vars
      • Q(f);CHECK,SBLOCK,XB(I)::QAB(C)+S(F)
      • K(b);OGATE,S_FLIGHT,XS(H)::P(G)
      • Q(f);N_PINB(I),SBLOCK,XS(H)::R1(B)
      • B(e);SBLOCK,XS(H)::R1(B)
      • S(g);N_GUARD,SBLOCK,XS(H)::B(E)
      • Q(f);N_GUARD,N_PINB(I)::S(H)
      • S(a);N_GUARD::B(E)
      • P(c);N_GUARD::QAR2(C)
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