MESON Chess Problem Database

Problem Display
PID: 232731 (4Q3/pkp5/8/1PKN4/8/8/4B3/6B1 w - - 0 1)

Hahnel, Peter

Freie Presse, 1990

4Q3/pkp5/8/1PKN4/8/8/4B3/6B1

#2

6 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...c6
      • 2.bxc6#
  • Tries
    • 1.Qc6+?
      • 1...Kc8
        • 2.Qxc7#
      • 1...Kb8!
  • Keys
    • 1.Kb4!
      • 1...a5+
        • 2.bxa5 ep#
      • 1...c5+
        • 2.bxc5 ep#
      • 1...a6
        • 2.bxa6#
      • 1...c6
        • 2.bxc6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(c);OGATE::P(C),XP(c)
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • K(b);P_SPINP(c),S_FLIGHT::QAR1(F),XP(c)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • K(D);S_FLIGHT
    • Vars
      • P(a);CHECK,OGATE::P(C),XP(a),EP
      • P(c);CHECK,OGATE::P(C),XP(c),EP
      • P(a);OGATE::P(C),XP(a)
      • P(c);OGATE::P(C),XP(c)
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