MESON Chess Problem Database

Problem Display
PID: 81951 (4Q3/1N1r2pK/p2P2p1/2RN4/r2k3n/2pp4/3Pp3/4q1bb w - - 0 1)

Ahues, Herbert Siegfried Oskar

Boletim da UBP, 1962

4Q3/1N1r2pK/p2P2p1/2RN4/r2k3n/2pp4/3Pp3/4q1bb

#2

7 + 13

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qf2
      • 2.dxc3#
    • 1...Qg3
      • 2.dxc3#
    • 1...Qb1
      • 2.dxc3#
    • 1...Qd1
      • 2.dxc3#
    • 1...Qf1
      • 2.dxc3#
    • 1...Bh2
      • 2.Qe3#
    • 1...Be3
      • 2.Qxe3#
      • 2.dxe3#
  • Tries
    • 1.Se3?
      • threat
        • 2.Qe5#
      • 1...Re7
        • 2.Qxa4#
      • 1...Qg3
        • 2.dxc3#
      • 1...Bd5
        • 2.Rxd5#
      • 1...Sf3
        • 2.Rd5#
      • 1...Bh2!
  • Keys
    • 1.Sb6!
      • threat
        • 2.Qe5#
      • 1...Re7
        • 2.Qxa4#
      • 1...Bd5
        • 2.Rxd5#
      • 1...Qg3
        • 2.dxc3#
      • 1...Bh2
        • 2.Qe3#
      • 1...Sf3
        • 2.Rd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • Q(a);N_GUARD::P(A),XP(e)
    • B(b);N_GUARD::QAB1(G)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAB1(G)
      • Vars
        • R(l);OGATE::QAR(G),XR(g)
        • Q(a);N_GUARD::P(A),XP(e)
        • B(c);N_GUARD::R1(B),XB(c)
        • S(i);S_CUTB(c)::R1(B)
      • Refutation
        • B(b);
  • Actual
    • S(C);
    • Threat
      • QAB1(G)
    • Vars
      • R(l);OGATE::QAR(G),XR(g)
      • B(c);N_GUARD::R1(B),XB(c)
      • Q(a);N_GUARD::P(A),XP(e)
      • B(b);N_GUARD::QAB1(G)
      • S(i);S_CUTB(c)::R1(B)
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