MESON Chess Problem Database

Problem Display
PID: 113139 (8/8/8/Qpp5/b7/kP6/N7/K7 w - - 0 1)

Savournin, Jacques

Le Probleme, 1961

8/8/8/Qpp5/b7/kP6/N7/K7

#2

4 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxb3
      • 2.Qc3#
    • 1...b4
      • 2.Qxa4#
    • 1...c4
      • 2.Qb4#
  • Tries
    • 1.Sc1?
      • 1...b4
        • 2.Qxa4#
      • 1...c4!
    • 1.Qd2?
      • threat
        • 2.Qb2#
      • 1...Kxb3
        • 2.Qc3#
        • 2.Qd3#
      • 1...Bxb3!
  • Keys
    • 1.Kb1!
      • 1...Kxb3
        • 2.Qc3#
      • 1...b4
        • 2.Qxa4#
      • 1...c4
        • 2.Qb4#

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(a);N_SPINB(b),OGATEB,P-FLIGHT,XP(C)::QAR1(D)
    • P(c);N_GUARD::QAR1(D),XB(b)
    • P(d);N_GUARD::QAB1(D)
  • Tries
    • Try
      • S(B);
      • Vars
        • P(c);N_GUARD::QAR1(D),XB(b)
      • Refutation
        • P(d);
    • Try
      • Q(D);N_PINB(b)
      • Threat
        • QAB1(D)
      • Refutation
        • B(b);XP(C)
  • Actual
    • K(A);P-FLIGHT
    • Vars
      • K(a);N_SPINB(b),OGATEB,P-FLIGHT,XP(C)::QAR1(D)
      • P(c);N_GUARD::QAR1(D),XB(b)
      • P(d);N_GUARD::QAB1(D)
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