MESON Chess Problem Database

Problem Display
PID: 81982 (8/r1p5/1BP3K1/1p6/4Pk1b/2Qp1Bp1/6P1/3N1n1N w - - 0 1)

Ahues, Herbert Siegfried Oskar

UV CSTV, 1987

8/r1p5/1BP3K1/1p6/4Pk1b/2Qp1Bp1/6P1/3N1n1N

#2

9 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Bxc7#
    • 1...Ra2
      • 2.Bxc7#
    • 1...Ra3
      • 2.Bxc7#
    • 1...Ra4
      • 2.Bxc7#
    • 1...Ra5
      • 2.Bxc7#
    • 1...Ra6
      • 2.Bxc7#
    • 1...Ra8
      • 2.Bxc7#
    • 1...Bf6
      • 2.Qxf6#
    • 1...Sd2
      • 2.Be3#
    • 1...Sh2
      • 2.Be3#
    • 1...Se3
      • 2.Bxe3#
  • Tries
    • 1.Sb2?
      • threat
        • 2.Sxd3#
      • 1...d2
        • 2.Sd3#
      • 1...cxb6!
    • 1.Shf2?
      • threat
        • 2.Sxd3#
        • 2.Sh3#
      • 1...d2
        • 2.Sd3#
        • 2.Sh3#
      • 1...gxf2!
    • 1.Qd4?
      • threat
        • 2.e5#
      • 1...Ra4
        • 2.Bxc7#
      • 1...Sd2!
    • 1.e5?
      • threat
        • 2.Qd4#
      • 1...Sd2
        • 2.Be3#
      • 1...Ra4!
  • Keys
    • 1.Sxg3!
      • threat
        • 2.Sh5#
      • 1...Kxg3
        • 2.Qe5#
      • 1...Bxg3
        • 2.Qf6#
      • 1...Sxg3
        • 2.Be3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 11
  • Sets
    • R(g);N_GUARD::B(G),XP(h)
    • B(e);N_GUARD::QAR2(D),XB(e)
    • S(a);N_GUARD::B(G)
    • S(a);N_GUARD::B(G),XS(a)
  • Tries
    • Try
      • S(A);
      • Threat
        • S(A),XP(b)
      • Vars
        • P(b);::S(A)
      • Refutation
        • P(h);XB(G)
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Refutation
        • P(c);XS(B)
    • Try
      • Q(D);
      • Threat
        • QAR(D)+P(F)
      • Vars
        • R(g);N_GUARD::B(G),XP(h)
      • Refutation
        • S(a);
    • Try
      • P(F);
      • Threat
        • QAR2(D)
      • Vars
        • S(a);N_GUARD::B(G)
      • Refutation
        • R(g);
  • Actual
    • S(B);XP(c)
    • Threat
      • S(B)
    • Vars
      • K(d);S_FLIGHT,XS(B)::QAB(D)
      • B(e);N_GUARD,SBLOCK,XS(B)::QAR2(D)
      • S(a);N_GUARD,SBLOCK,XS(B)::B(G)
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