MESON Chess Problem Database

Problem Display
PID: 162774 (2n5/8/K1N2Np1/R3Pk2/2Qpp2R/6p1/4rq2/2BBbb2 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Kolnische Zeitung, 1942

(First published on Sun Sep 6 1942)

2n5/8/K1N2Np1/R3Pk2/2Qpp2R/6p1/4rq2/2BBbb2

#2

9 + 10

15601 Albrecht-Leiss-Degener Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Qg2
      • 2.Sxd4#
    • 1...Qh2
      • 2.Sxd4#
    • 1...Qf3
      • 2.Sxd4#
    • 1...Ra2
      • 2.Bg4#
    • 1...Rb2
      • 2.Bg4#
    • 1...Rc2
      • 2.Bg4#
    • 1...Sb6
      • 2.Se7#
    • 1...Sd6
      • 2.Se7#
    • 1...Sa7
      • 2.Se7#
    • 1...Se7
      • 2.Sxe7#
  • Tries
    • 1.Rh5+?
      • 1...g5
        • 2.Rxg5#
      • 1...gxh5!
  • Keys
    • 1.Sh7!
      • threat
        • 2.Qf7#
      • 1...Ra2
        • 2.Bg4#
      • 1...Rb2
        • 2.Bg4#
      • 1...Rc2
        • 2.Bg4#
      • 1...Rd2
        • 2.e6#
      • 1...Re3
        • 2.Sxd4#
      • 1...Sd6
        • 2.Se7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • Q(d);N_GUARD::S(H),XP(f)
    • R(c);OGATE,P_PINQ(C),P_PINR(E)::B(B)
    • R(c);OGATE,P_PINQ(C)::B(B)
    • S(j);N_GUARD::S(H)
    • S(j);N_GUARD::S(H),XS(j)
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • P(i);P_SPINP(i)::R1(D),XP(i)
      • Refutation
        • P(i);XR(D)
  • Actual
    • S(I);
    • Threat
      • QAR2(C)
    • Vars
      • R(c);OGATE,P_PINQ(C),P_PINR(E)::B(B)
      • R(c);OGATE,P_PINQ(C)::B(B)
      • R(c);P_PINQ(C),S_CUTB(a)::R(E)+P(F)
      • R(c);P_PINQ(C),S_CUTQ(d)::S(H),XP(f)
      • S(j);N_GUARD::S(H)
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