MESON Chess Problem Database

Problem Display
PID: 47697 (8/8/5B2/8/8/1KN2q2/3N4/k7 w - - 0 1)

Otte, M

Denken und Raten, 1934

8/8/5B2/8/8/1KN2q2/3N4/k7

#2

4 + 2

4883 Still More Fun with Chess Miniatures 2002
56 The Problemist 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qd1+
      • 2.Sxd1#
    • 1...Qh1
      • 2.Scb1#
      • 2.Sd1#
      • 2.Sa2#
      • 2.Se2#
      • 2.Sa4#
      • 2.Sce4#
      • 2.Sb5#
      • 2.Sd5#
    • 1...Qe2
      • 2.Sxe2#
      • 2.Sce4#
    • 1...Qg2
      • 2.Scb1#
      • 2.Sd1#
      • 2.Sa2#
      • 2.Se2#
      • 2.Sa4#
      • 2.Sce4#
      • 2.Sb5#
      • 2.Sd5#
    • 1...Qe4
      • 2.Scxe4#
    • 1...Qg4
      • 2.Sce4#
    • 1...Qd5+
      • 2.Sxd5#
    • 1...Qb7+
      • 2.Sb5#
    • 1...Qa8
      • 2.Scb1#
      • 2.Sd1#
      • 2.Sa2#
      • 2.Se2#
      • 2.Sa4#
      • 2.Sce4#
      • 2.Sb5#
      • 2.Sd5#
    • 1...Qxc3+
      • 2.Bxc3#
  • Keys
    • 1.Ka3!
      • threat
        • 2.Sb3#
      • 1...Qa8+
        • 2.Sa4#
      • 1...Qxc3+
        • 2.Bxc3#
      • 1...Qd1
        • 2.Scb1#
        • 2.Sxd1#
        • 2.Sa2#
        • 2.Se2#
        • 2.Sa4#
        • 2.Sce4#
        • 2.Sb5#
        • 2.Sd5#
      • 1...Qd5
        • 2.Sxd5#
      • 1...Qb7
        • 2.Sb5#

There are these afters: 134254

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • Q(b);CHECK,N_PINS(C)::B(D)+S(C),XQ(b)
    • Q(b);N_PINS(C)::B(D)+S(C),XQ(b)
    • Q(b);N_PINS(C)::B(D)+S(C)
    • Q(b);CHECK,N_PINS(C)::B(D)+S(C)
    • Q(b);CHECK,OGATE,P_SPINQ(b),XS(C)::B(D),XQ(b)
  • Actual
    • K(B);P-FLIGHT
    • Threat
      • S(A)
    • Vars
      • Q(b);CHECK,N_PINS(C)::B(D)+S(C)
      • Q(b);CHECK,OGATE,P_SPINQ(b),XS(C)::B(D),XQ(b)
      • Q(b);N_PINS(C)::B(D)+S(C),XQ(b)
      • Q(b);N_PINS(C)::B(D)+S(C)
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