MESON Chess Problem Database

Problem Display
PID: 12407 (b1N5/3r1q2/RQ6/3Bk3/6P1/3P4/8/K1B5 w - - 0 1)

Morice, Jean

24 Heures de Lausanne, 1979

b1N5/3r1q2/RQ6/3Bk3/6P1/3P4/8/K1B5

#2

8 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd5
      • 2.Ra5#
    • 1...Qxd5
      • 2.Qf6#
    • 1...Rxd5
      • 2.Qe3#
    • 1...Bxd5
      • 2.Qb2#
  • Tries
    • 1.Bb2+?
      • 1...Kxd5
        • 2.Ra5#
        • 2.Qd4#
        • 2.Qa5#
        • 2.Qb5#
      • 1...Kf4!
    • 1.Qf6+?
      • 1...Kxd5
        • 2.Ra5#
      • 1...Qxf6!
  • Keys
    • 1.Ra4!
      • threat
        • 2.Qd4#
      • 1...Kxd5
        • 2.Ra5#
      • 1...Qxd5
        • 2.Bf4#
      • 1...Rxd5
        • 2.Re4#
      • 1...Bxd5
        • 2.Bb2#
      • 1...Qf2
        • 2.Qe6#
      • 1...Qf4
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);OGATEB,P-FLIGHT,XB(E)::R(F)
    • Q(c);N_GUARD,SBLOCK,XB(E)::QAB1(G)
    • R(b);SBLOCK,XB(E)::QAR2(G)
    • B(d);SBLOCK,XB(E)::QAB(G)
  • Tries
    • Try
      • B(B);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(G);CHECK
      • Vars
        • K(a);P-FLIGHT,XB(E)::R(F)
      • Refutation
        • Q(c);XQ(G)
  • Actual
    • R(F);
    • Threat
      • QAB1(G)
    • Vars
      • K(a);OGATEB,P-FLIGHT,XB(E)::R(F)
      • Q(c);N_GUARD,SBLOCK,XB(E)::B(B)
      • R(b);SBLOCK,XB(E)::R1(F)
      • B(d);SBLOCK,XB(E)::B(B)
      • Q(c);N_GUARD::QAR1(G)
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