MESON Chess Problem Database

Problem Display
PID: 241093 (1q1R3B/5p2/Br2p3/2pnP2R/1pPkNN2/p4P2/2QK4/5b2 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Sachsische Zeitung, 2005

1q1R3B/5p2/Br2p3/2pnP2R/1pPkNN2/p4P2/2QK4/5b2

#2

11 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe5
      • 2.Bxe5#
    • 1...Be2
      • 2.Sxe2#
    • 1...Bg2
      • 2.Se2#
      • 2.Qd3#
    • 1...Bd3
      • 2.Qxd3#
    • 1...Bh3
      • 2.Se2#
      • 2.Qd3#
    • 1...Bxc4
      • 2.Qxc4#
    • 1...a2
      • 2.Qb2#
    • 1...b3
      • 2.Qc3#
  • Tries
    • 1.Sf2?
      • threat
        • 2.Qe4#
      • 1...Bd3
        • 2.Qxd3#
      • 1...f5!
    • 1.Sc3?
      • threat
        • 2.Qe4#
      • 1...bxc3+
        • 2.Qxc3#
      • 1...Bd3
        • 2.Qxd3#
      • 1...f5!
    • 1.Sg3?
      • threat
        • 2.Qe4#
      • 1...Bd3
        • 2.Qxd3#
      • 1...f5!
    • 1.Sg5?
      • threat
        • 2.Qe4#
      • 1...Bd3
        • 2.Qxd3#
      • 1...f5!
    • 1.Sf6?
      • threat
        • 2.Qe4#
      • 1...Bd3
        • 2.Qxd3#
      • 1...Qxe5!
    • 1.Sxe6+?
      • 1...Rxe6
        • 2.Rxd5#
      • 1...fxe6!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Qe4#
      • 1...f5
        • 2.Sxe6#
      • 1...Bd3
        • 2.Qxd3#
      • 1...Sc3
        • 2.Sf5#
      • 1...Sf6
        • 2.Sb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • Q(j);OGATE,P_SPINQ(j),XP(G)::B(K),XQ(j)
    • B(a);N_GUARD::S(F),XB(a)
    • B(a);N_GUARD::QAR1(A),XB(a)
    • B(a);OGATE,XP(D)::QAR1(A),XB(a)
    • P(b);N_GUARD::QAB(A)
    • P(c);N_GUARD::QAB1(A)
  • Tries
    • Try
      • S(E);
      • Threat
        • QAR1(A)
      • Vars
        • B(a);N_GUARD::QAR1(A),XB(a)
      • Refutation
        • P(i);
    • Try
      • S(E);
      • Threat
        • QAR1(A)
      • Vars
        • P(c);CHECK,OGATE,XS(E)::QAB1(A),XP(c)
        • B(a);N_GUARD::QAR1(A),XB(a)
      • Refutation
        • P(i);
    • Try
      • S(E);
      • Threat
        • QAR1(A)
      • Vars
        • B(a);N_GUARD::QAR1(A),XB(a)
      • Refutation
        • P(i);
    • Try
      • S(E);
      • Threat
        • QAR1(A)
      • Vars
        • B(a);N_GUARD::QAR1(A),XB(a)
      • Refutation
        • P(i);
    • Try
      • S(E);
      • Threat
        • QAR1(A)
      • Vars
        • B(a);N_GUARD::QAR1(A),XB(a)
      • Refutation
        • Q(j);XP(G)
    • Try
      • S(F);CHECK,XP(h)
      • Vars
        • R(g);XS(F)::R1(J),XS(f)
      • Refutation
        • P(i);XS(F)
  • Actual
    • S(E);N_PINS(f)
    • Threat
      • QAR1(A)
    • Vars
      • P(i);N_GUARD::S(F),XP(h)
      • B(a);N_GUARD::QAR1(A),XB(a)
      • S(f);::R(J)+S(E),DCHECK
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