MESON Chess Problem Database

Problem Display
PID: 179530 (B2Q4/3p2p1/1qR5/7r/2p2Bp1/bpR1PkNp/7P/5K2 w - - 0 1)

Robert, Philippe

diagrammes, 1974

B2Q4/3p2p1/1qR5/7r/2p2Bp1/bpR1PkNp/7P/5K2

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...dxc6
      • 2.Qd1#
  • Tries
    • 1.Rxb6+?
      • 1...Rd5
        • 2.Bxd5#
      • 1...d5!
    • 1.Rf6+?
      • 1...Qc6
        • 2.e4#
      • 1...Qb7
        • 2.e4#
      • 1...Rd5
        • 2.Bxd5#
      • 1...d5!
  • Keys
    • 1.Bg5!
      • threat
        • 2.Rf6#
      • 1...Qxc6
        • 2.e4#
      • 1...dxc6
        • 2.Qd1#
      • 1...Qb7
        • 2.e4#
      • 1...Bd6
        • 2.Rxb6#
      • 1...d5
        • 2.Qxd5#
      • 1...d6
        • 2.Qf8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • P(i);OGATE,P_SPINP(i),XR(G)::QAB(I)
  • Tries
    • Try
      • R(G);CHECK,XQ(h)
      • Vars
        • R(g);N_GUARD,P_SPINR(g)::B(H),XR(g)
      • Refutation
        • P(i);P_SPINP(i)
    • Try
      • R(G);CHECK
      • Vars
        • Q(h);N_GUARD,P_SPINQ(h)::R(C)+P(D)
        • R(g);N_GUARD,P_SPINR(g)::B(H),XR(g)
      • Refutation
        • P(i);P_SPINP(i)
  • Actual
    • B(F);
    • Threat
      • B(H)+R(G),DCHECK
    • Vars
      • Q(h);N_GUARD,P_SPINQ(h),XR(G)::R(C)+P(D)
      • P(i);OGATE,P_SPINP(i),XR(G)::QAB(I)
      • Q(h);N_GUARD::R(C)+P(D)
      • B(a);S_CUTP(i)::B(H)+R(G),XQ(h)
      • P(i);OGATE::QAB(I),XP(i)
      • P(i);S_CUTB(a)::QAR(I)
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