MESON Chess Problem Database

Problem Display
PID: 237250 (3r4/n1Q3br/B2p4/2p3p1/K1Pk2N1/Rn2R3/8/3N4 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Schweizerische Schachzeitung, 2007

3r4/n1Q3br/B2p4/2p3p1/K1Pk2N1/Rn2R3/8/3N4

#2

8 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rh1
      • 2.Qxg7#
    • 1...Rh2
      • 2.Qxg7#
    • 1...Rh3
      • 2.Qxg7#
    • 1...Rh4
      • 2.Qxg7#
    • 1...Rh5
      • 2.Qxg7#
    • 1...Rhh8
      • 2.Qxg7#
    • 1...Ra8
      • 2.Qxd6#
    • 1...Rb8
      • 2.Qxd6#
    • 1...Rc8
      • 2.Qxd6#
    • 1...Re8
      • 2.Qxd6#
    • 1...Rf8
      • 2.Qxd6#
    • 1...Rg8
      • 2.Qxd6#
    • 1...Rdh8
      • 2.Qxd6#
    • 1...Sa1
      • 2.Rad3#
    • 1...Sd2
      • 2.Rad3#
    • 1...Sa5
      • 2.Rad3#
  • Tries
    • 1.Sdf2?
      • threat
        • 2.Rd3#
      • 1...Rh3
        • 2.Qxg7#
      • 1...Sc1
        • 2.Re4#
      • 1...Sb5!
    • 1.Qa5?
      • threat
        • 2.Qc3#
      • 1...Sxa5
        • 2.Rad3#
      • 1...Sb5!
  • Keys
    • 1.Sgf2!
      • threat
        • 2.Re4#
      • 1...Rh4
        • 2.Qxg7#
      • 1...Re8
        • 2.Qxd6#
      • 1...Sd2
        • 2.Rad3#
      • 1...d5
        • 2.Rd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 13
  • Sets
    • R(h);N_GUARD::QAB(H),XB(g)
    • R(i);N_GUARD::QAR2(H),XP(e)
    • S(a);OGATE::R1(B)
  • Tries
    • Try
      • S(A);
      • Threat
        • R1(C)
      • Vars
        • R(h);N_GUARD::QAB(H),XB(g)
        • S(a);::R1(C)
      • Refutation
        • S(f);
    • Try
      • Q(H);
      • Threat
        • QAB1(H)
      • Vars
        • S(a);OGATE,XQ(H)::R1(B)
      • Refutation
        • S(f);
  • Actual
    • S(F);
    • Threat
      • R1(C)
    • Vars
      • R(h);N_GUARD::QAB(H),XB(g)
      • R(i);N_GUARD::QAR2(H),XP(e)
      • S(a);OGATE::R1(B)
      • P(e);::R1(C)
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