MESON Chess Problem Database

Problem Display
PID: 83732 (8/B3nb2/R2pqP2/1B1kP1N1/1PN3p1/1P4p1/4pQK1/3rr1bn w - - 0 1)

Ellerman, Arnoldo

Sahovski Vestnik, 1951-1952

8/B3nb2/R2pqP2/1B1kP1N1/1PN3p1/1P4p1/4pQK1/3rr1bn

#2

11 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qf5
      • 2.Rxd6#
    • 1...Qc8
      • 2.Rxd6#
    • 1...Qxe5
      • 2.Sb6#
    • 1...Sf5
      • 2.Bc6#
    • 1...Sc6
      • 2.Bxc6#
    • 1...Sg6
      • 2.Bc6#
    • 1...Sc8
      • 2.Bc6#
    • 1...Sg8
      • 2.Bc6#
    • 1...dxe5
      • 2.Se3#
  • Tries
    • 1.Qe3?
      • threat
        • 2.Sb6#
        • 2.Qe4#
      • 1...Qxe5
        • 2.Sb6#
      • 1...dxe5
        • 2.Qe4#
      • 1...Qf5
        • 2.Sb6#
        • 2.Rxd6#
      • 1...Rd4
        • 2.Sb6#
      • 1...Bg6
        • 2.Sb6#
      • 1...Sf2
        • 2.Sb6#
      • 1...Sc8
        • 2.Bc6#
        • 2.Qe4#
      • 1...Bxe3!
  • Keys
    • 1.Qf5!
      • threat
        • 2.Qe4#
      • 1...Qxf5
        • 2.Rxd6#
      • 1...Qxe5
        • 2.Rxd6#
      • 1...Sxf5
        • 2.Bc6#
      • 1...Rd4
        • 2.Sb6#
      • 1...Bg6
        • 2.Qxe6#
      • 1...Sf2
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • Q(j);N_GUARD::R1(I),XP(i)
    • Q(j);SBLOCK,XP(G)::S(E)
    • S(k);N_GUARD::B(F)
    • S(k);N_GUARD::B(F),XS(k)
    • P(i);SBLOCK,XP(G)::S(E)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • Q(j);XP(G)::S(E)
        • P(i);XP(G)::QAB1(A)
        • R(a);::S(E)
        • B(l);::S(E)
        • S(d);::S(E)
      • Refutation
        • B(c);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • Q(j);N_GUARD,XQ(A)::R1(I),XP(i)
      • Q(j);N_GUARD,P_SPINQ(j),XP(G)::R1(I),XP(i)
      • S(k);N_GUARD,XQ(A)::B(F)
      • R(a);SBLOCK,S_CUTB(c)::S(E)
      • B(l);N_GUARD::QAB1(A),XQ(j)
      • S(d);S_CUTB(c)::S(E)
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