MESON Chess Problem Database

Problem Display
PID: 180061 (8/8/4p3/1pp3KB/1np1kP2/4P3/Q2R4/3N1b2 w - - 0 1)

Prat, J

Traite de Delaire, 1911

8/8/4p3/1pp3KB/1np1kP2/4P3/Q2R4/3N1b2

#2

7 + 7

78 Bulletin Ouvrier des Echecs 1952

SOLUTION

  • SOUND
  • Sets
    • 1...Sc2
      • 2.Qa8#
    • 1...Sd3
      • 2.Qa8#
    • 1...c3
      • 2.Qxe6#
  • Tries
    • 1.Qa8+?
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sd5!
  • Keys
    • 1.Rd3!
      • threat
        • 2.Sf2#
      • 1...Kxd3
        • 2.Bg6#
      • 1...Bxd3
        • 2.Qg2#
      • 1...Sxd3
        • 2.Qa8#
      • 1...cxd3
        • 2.Qxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • S(b);N_GUARD::QAB(B)
    • P(c);OGATE::QAR2(B),XP(g)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAB(B),XS(b)
      • Refutation
        • S(b);P_SPINS(b)
  • Actual
    • R(C);
    • Threat
      • S(A)
    • Vars
      • K(d);S_FLIGHT,XR(C)::B(G)
      • B(a);N_GUARD,SBLOCK,XR(C)::QAB(B)
      • S(b);N_GUARD,SBLOCK,XR(C)::QAB(B)
      • P(c);OGATE,SBLOCK,XR(C)::QAR2(B),XP(g)
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