MESON Chess Problem Database

Problem Display
PID: 82066 (1B1R3b/3q4/6Qn/2pB4/1PPkP1p1/3P4/3K4/5b2 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Problemas, 1956

1B1R3b/3q4/6Qn/2pB4/1PPkP1p1/3P4/3K4/5b2

#2

9 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qa4
      • 2.Bc6#
    • 1...Qb5
      • 2.Bc6#
    • 1...Qc6
      • 2.Bxc6#
    • 1...Qe6
      • 2.Bxe6#
    • 1...Qxd5
      • 2.Rxd5#
    • 1...Qa7
      • 2.Bb7#
    • 1...Qb7
      • 2.Bxb7#
    • 1...Qf7
      • 2.Bxf7#
    • 1...Qg7
      • 2.Bf7#
    • 1...Qh7
      • 2.Bf7#
    • 1...Bf6
      • 2.Qxf6#
    • 1...cxb4
      • 2.Qb6#
  • Tries
    • 1.Qg7+?
      • 1...Qxg7
        • 2.Bf7#
      • 1...Bxg7!
    • 1.e5?
      • threat
        • 2.Qe4#
      • 1...Bxd3
        • 2.Qxd3#
      • 1...cxb4
        • 2.Qb6#
      • 1...Qf5
        • 2.Be6#
      • 1...Qh7
        • 2.Bf7#
      • 1...Sf5
        • 2.Qxg4#
      • 1...Bg2!
  • Keys
    • 1.Qa6!
      • threat
        • 2.Qa1#
      • 1...cxb4
        • 2.Qb6#
      • 1...Qa4
        • 2.Bc6#
      • 1...Qa7
        • 2.Bb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 9
  • Sets
    • Q(f);OGATEB::R(I)+B(F)
    • Q(f);OGATEB::R(I)+B(F),XQ(f)
    • Q(f);OGATE,P_SPINQ(f),XB(F)::R1(I),XQ(f)
    • B(g);N_GUARD::QAB(G),XB(g)
    • P(d);OGATEB,XP(C)::QAB(G)
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • Q(f);S_CUTB(g),XQ(G)::R(I)+B(F)
      • Refutation
        • B(g);XQ(G)
    • Try
      • P(E);
      • Threat
        • QAR1(G)
      • Vars
        • B(a);OGATE,XP(B)::QAR1(G),XB(a)
        • P(d);OGATEB,XP(C)::QAB(G)
        • Q(f);OGATEB::R(I)+B(F)
        • S(e);N_GUARD,S_CUTQ(f)::QAR(G),XP(c)
      • Refutation
        • B(a);
  • Actual
    • Q(G);
    • Threat
      • QAB(G)
    • Vars
      • P(d);OGATEB,XP(C)::QAB(G)
      • Q(f);OGATEB::R(I)+B(F)
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