MESON Chess Problem Database

Problem Display
PID: 141425 (8/4p3/4p3/1B2P3/1kP5/1p2Q3/4N3/1K6 w - - 0 1)

Langer, O

Narodni Politika, 1930

(First published on Wed Nov 26 1930)

8/4p3/4p3/1B2P3/1kP5/1p2Q3/4N3/1K6

#2

6 + 4

14868 Pirnie Collection 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Ka3
      • 2.Qc5#
  • Tries
    • 1.Qd2+?
      • 1...Ka3
        • 2.Qa5#
      • 1...Kc5!
    • 1.Qb6?
      • 1...Ka3
        • 2.Qa5#
        • 2.Qc5#
      • 1...b2!
    • 1.Qc3+?
      • 1...Ka3
        • 2.Qa5#
      • 1...Kc5!
  • Keys
    • 1.Sd4!
      • 1...Ka3
        • 2.Sc2#
        • 2.Qxb3#
      • 1...Ka5
        • 2.Sc6#
      • 1...Kc5
        • 2.Sc2#
        • 2.Sc6#
      • 1...b2
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(b);P_SPINP(a),S_FLIGHT::QAB(C)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR2(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(C);
      • Refutation
        • P(a);
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);OGATE,P_SPINP(a),S_FLIGHT::QAR2(C)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • S(B);
    • Vars
      • K(b);S_FLIGHT::S(B)
      • P(a);::S(B)
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