MESON Chess Problem Database

Problem Display
PID: 145419 (1b6/r3np2/bR2N3/rp2k1P1/5p2/2P2P1B/4PN1K/3R4 w - - 0 1)

Ahues, Herbert Siegfried Oskar

2nd Prize, Sachsische Zeitung, 2007

1b6/r3np2/bR2N3/rp2k1P1/5p2/2P2P1B/4PN1K/3R4

#2

10 + 9

23 Die Schwalbe 2011
5454 Near Snap 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Sd5
      • 2.Sd3#
    • 1...Sf5
      • 2.Sg4#
    • 1...fxe6
      • 2.Rxe6#
  • Tries
    • 1.Sg7?
      • threat
        • 2.Sg4#
      • 1...f5
        • 2.Re6#
      • 1...Bc8!
    • 1.Rd5+?
      • 1...Sxd5
        • 2.Sd3#
      • 1...Kxd5!
    • 1.e4?
      • threat
        • 2.Sd3#
        • 2.Sg4#
      • 1...fxe4 ep
        • 2.f4#
      • 1...Rd7
        • 2.Sg4#
      • 1...Bd6
        • 2.Sd3#
      • 1...Sc6
        • 2.Rd5#
      • 1...b4
        • 2.Sg4#
      • 1...f5
        • 2.Sd3#
      • 1...Ra2!
  • Keys
    • 1.Sd8!
      • threat
        • 2.Sxf7#
      • 1...Sd5
        • 2.Sd3#
      • 1...Sf5
        • 2.Sg4#
      • 1...Sc6
        • 2.Sxc6#
      • 1...Sg6
        • 2.Sc6#
      • 1...Sc8
        • 2.Sc6#
      • 1...Sg8
        • 2.Sc6#
      • 1...f5
        • 2.Sf7#
        • 2.Re6#
      • 1...f6
        • 2.Sf7#
        • 2.Re6#

This anticipates 186265(2016)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • S(g);SBLOCK::S(C)
    • P(h);OGATE,XS(J)::R1(I),XP(h)
  • Tries
    • Try
      • S(J);
      • Threat
        • S(C)
      • Vars
        • P(h);N_GUARD::R1(I)
      • Refutation
        • B(e);
    • Try
      • R(A);CHECK
      • Vars
        • S(g);SBLOCK,XR(A)::S(C)
      • Refutation
        • K(d);P-FLIGHT,XR(A)
    • Try
      • P(B);
      • Threat
        • DUALS(2)
      • Vars
        • P(a);EP,OGATE,XP(B)::P(F)
        • R(f);::S(C)
        • B(i);::S(C)
        • S(g);N_GUARD::R1(A)
        • P(c);::S(C)
        • P(h);::S(C)
      • Refutation
        • R(b);P_PINS(C)
  • Actual
    • S(J);
    • Threat
      • S(J),XP(h)
    • Vars
      • S(g);SBLOCK::S(C)
      • S(g);N_GUARD::S(J),XS(g)
      • S(g);N_GUARD::S(J)
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