MESON Chess Problem Database

Problem Display
PID: 23541 (8/8/8/8/2pNQ3/4n3/b7/k1K5 w - - 0 1)

Bethge, Friedrich

Aachener Nachrichten, 1954

8/8/8/8/2pNQ3/4n3/b7/k1K5

#2

3 + 4

2786 More Fun with Chess Miniatures 2000

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.Qxb1#
    • 1...Bb3
      • 2.Qb1#
    • 1...Sd1
      • 2.Sc2#
    • 1...Sf1
      • 2.Sc2#
    • 1...Sc2
      • 2.Sxc2#
    • 1...Sg2
      • 2.Sc2#
    • 1...Sg4
      • 2.Sc2#
    • 1...Sd5
      • 2.Sc2#
    • 1...Sf5
      • 2.Sc2#
  • Tries
    • 1.Sb3+?
      • 1...Bxb3
        • 2.Qb1#
      • 1...cxb3!
    • 1.Qc2?
      • threat
        • 2.Qb2#
        • 2.Qc3#
      • 1...Sxc2
        • 2.Sxc2#
      • 1...Bb1
        • 2.Qxb1#
        • 2.Qb2#
      • 1...Bb3
        • 2.Qb1#
        • 2.Qb2#
      • 1...Sd5
        • 2.Qb2#
      • 1...c3
        • 2.Qxc3#
      • 1...Sd1!
    • 1.Qg2?
      • threat
        • 2.Qb2#
      • 1...Sxg2
        • 2.Sc2#
      • 1...Sd1
        • 2.Sc2#
      • 1...Sc2
        • 2.Sxc2#
      • 1...c3!
    • 1.Qd3?
      • threat
        • 2.Qc3#
      • 1...Bb1
        • 2.Qxb1#
      • 1...Bb3
        • 2.Qb1#
      • 1...Sd1
        • 2.Sc2#
      • 1...Sd5
        • 2.Sc2#
      • 1...c3
        • 2.Qxc3#
      • 1...cxd3!
    • 1.Qf5?
      • 1...Sxf5
        • 2.Sc2#
      • 1...Bb1
        • 2.Qxb1#
      • 1...Bb3
        • 2.Qb1#
      • 1...Sd1
        • 2.Sc2#
      • 1...Sf1
        • 2.Sc2#
      • 1...Sc2
        • 2.Sxc2#
      • 1...Sg2
        • 2.Sc2#
      • 1...Sg4
        • 2.Sc2#
      • 1...Sd5
        • 2.Sc2#
      • 1...c3!
    • 1.Qg6?
      • 1...Bb1
        • 2.Qxb1#
      • 1...Bb3
        • 2.Qb1#
      • 1...Sd1
        • 2.Sc2#
      • 1...Sf1
        • 2.Sc2#
      • 1...Sc2
        • 2.Sxc2#
      • 1...Sg2
        • 2.Sc2#
      • 1...Sg4
        • 2.Sc2#
      • 1...Sd5
        • 2.Sc2#
      • 1...Sf5
        • 2.Sc2#
      • 1...c3!
    • 1.Qh7?
      • 1...Bb1
        • 2.Qxb1#
      • 1...Bb3
        • 2.Qb1#
      • 1...Sd1
        • 2.Sc2#
      • 1...Sf1
        • 2.Sc2#
      • 1...Sc2
        • 2.Sxc2#
      • 1...Sg2
        • 2.Sc2#
      • 1...Sg4
        • 2.Sc2#
      • 1...Sd5
        • 2.Sc2#
      • 1...Sf5
        • 2.Sc2#
      • 1...c3!
  • Keys
    • 1.Qa8!
      • 1...Sd1
        • 2.Sc2#
      • 1...Sf1
        • 2.Sc2#
      • 1...Sc2
        • 2.Sxc2#
      • 1...Sg2
        • 2.Sc2#
      • 1...Sg4
        • 2.Sc2#
      • 1...Sd5
        • 2.Sc2#
      • 1...Sf5
        • 2.Sc2#
      • 1...c3
        • 2.Sb3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • B(b);N_GUARD::QAR1(C),XB(b)
    • B(b);N_GUARD::QAR1(C)
    • S(c);N_GUARD::S(B)
    • S(c);N_GUARD::S(B),XS(c)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • B(b);XS(B)::QAR1(C)
      • Refutation
        • P(d);XS(B)
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • S(c);XQ(C)::S(B),XS(c)
        • S(c);::QAB1(C)
        • P(d);::QAB(C),XP(d)
      • Refutation
        • S(c);
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • S(c);N_GUARD,XQ(C)::S(B)
        • S(c);N_GUARD::S(B)
        • S(c);N_GUARD::S(B),XS(c)
      • Refutation
        • P(d);
    • Try
      • Q(C);
      • Threat
        • QAB(C)
      • Vars
        • B(b);N_GUARD::QAR1(C),XB(b)
        • B(b);N_GUARD::QAR1(C)
        • S(c);N_GUARD::S(B)
        • P(d);::QAB(C),XP(d)
      • Refutation
        • P(d);XQ(C)
    • Try
      • Q(C);
      • Vars
        • S(c);N_GUARD,XQ(C)::S(B)
        • B(b);N_GUARD::QAR1(C),XB(b)
        • B(b);N_GUARD::QAR1(C)
        • S(c);N_GUARD::S(B)
        • S(c);N_GUARD::S(B),XS(c)
      • Refutation
        • P(d);
    • Try
      • Q(C);
      • Vars
        • B(b);N_GUARD::QAR1(C),XB(b)
        • B(b);N_GUARD::QAR1(C)
        • S(c);N_GUARD::S(B)
        • S(c);N_GUARD::S(B),XS(c)
      • Refutation
        • P(d);
    • Try
      • Q(C);
      • Vars
        • B(b);N_GUARD::QAR1(C),XB(b)
        • B(b);N_GUARD::QAR1(C)
        • S(c);N_GUARD::S(B)
        • S(c);N_GUARD::S(B),XS(c)
      • Refutation
        • P(d);
  • Actual
    • Q(C);P_PINB(b)
    • Vars
      • S(c);N_GUARD::S(B)
      • S(c);N_GUARD::S(B),XS(c)
      • P(d);N_GUARD::S(B)
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