MESON Chess Problem Database

Problem Display
PID: 149537 (2n5/1B6/N3R3/k2q2Q1/P3b3/K7/8/8 w - - 0 1)

Albrecht, Hermann

National-Zeitung, 1938

2n5/1B6/N3R3/k2q2Q1/P3b3/K7/8/8

#2

6 + 4

15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Qb5
      • 2.Qxb5#
    • 1...Qc5+
      • 2.Qxc5#
    • 1...Qf5
      • 2.Qd2#
    • 1...Bb1
      • 2.Qxd5#
    • 1...Bc2
      • 2.Qxd5#
    • 1...Bd3
      • 2.Qd2#
    • 1...Bg6
      • 2.Qxd5#
    • 1...Bh7
      • 2.Qxd5#
    • 1...Sd6
      • 2.Qd8#
  • Tries
    • 1.Sb4?
      • threat
        • 2.Ra6#
      • 1...Sd6
        • 2.Qd8#
      • 1...Sb6
        • 2.Sc6#
      • 1...Bd3!
    • 1.Qd8+?
      • 1...Sb6
        • 2.Qxb6#
      • 1...Qxd8!
  • Keys
    • 1.Sb8!
      • threat
        • 2.Ra6#
      • 1...Qc5+
        • 2.Qxc5#
      • 1...Sd6
        • 2.Qd8#
      • 1...Bd3
        • 2.Qd2#
      • 1...Sb6
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • Q(c);OGATE::QAR1(C),XQ(c)
    • Q(c);CHECK,OGATE::QAR2(C),XQ(c)
    • Q(c);N_GUARD::QAB(C)
    • B(a);N_GUARD::QAR(C),XQ(c)
    • B(a);::QAB(C)
    • S(d);N_GUARD::QAB(C)
  • Tries
    • Try
      • S(D);
      • Threat
        • R1(E)
      • Vars
        • S(d);N_GUARD::QAB(C)
        • S(d);SBLOCK::S(D)
      • Refutation
        • B(a);
    • Try
      • Q(C);CHECK,N_PINQ(c)
      • Vars
        • S(d);N_GUARD,P_SPINS(d)::QAB1(C),XS(d)
      • Refutation
        • Q(c);XQ(C)
  • Actual
    • S(D);
    • Threat
      • R1(E)
    • Vars
      • Q(c);CHECK,OGATE::QAR2(C),XQ(c)
      • S(d);N_GUARD::QAB(C)
      • B(a);::QAB(C)
      • S(d);SBLOCK::S(D)
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