MESON Chess Problem Database

Problem Display
PID: 176575 (8/4R3/r2PbP1r/3Pk2P/2R1N2P/2p1B1N1/6B1/2q1Q1bK w - - 0 1)

Robert, Philippe

Comm., Schach-Echo, 1977

8/4R3/r2PbP1r/3Pk2P/2R1N2P/2p1B1N1/6B1/2q1Q1bK

#2

13 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd5
      • 2.Rc5#
  • Tries
    • 1.Sd2?
      • threat
        • 2.Rxe6#
      • 1...Kxd6
        • 2.Bf4#
      • 1...Kxf6
        • 2.Bg5#
      • 1...Rxf6
        • 2.Bf4#
      • 1...Rxd6!
    • 1.Qxc3+?
      • 1...Kxd5
        • 2.Rc5#
        • 2.Qd4#
      • 1...Qxc3!
  • Keys
    • 1.Sf2!
      • threat
        • 2.Rxe6#
      • 1...Kxd6
        • 2.Bc5#
      • 1...Kxf6
        • 2.Bd4#
      • 1...Rxd6
        • 2.Sg4#
      • 1...Rxf6
        • 2.Bf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • K(d);N_SPINB(f),OGATEB,P-FLIGHT,XP(I)::R1(F)
  • Tries
    • Try
      • S(G);
      • Threat
        • R1(M),XB(f)
      • Vars
        • K(d);N_SPINB(f),S_FLIGHT,XP(K)::B(D)
        • K(d);N_SPINB(f),S_FLIGHT,XP(L)::B(D)
        • R(g);SBLOCK,XP(L)::QAR(A)+B(D),DCHECK
      • Refutation
        • R(e);XP(K)
    • Try
      • Q(A);CHECK,XP(c)
      • Refutation
        • Q(a);XQ(A)
  • Actual
    • S(G);
    • Threat
      • R1(M),XB(f)
    • Vars
      • K(d);N_SPINB(f),S_FLIGHT,XP(K)::B(D)
      • K(d);N_SPINB(f),S_FLIGHT,XP(L)::B(D)
      • R(e);SBLOCK,XP(K)::S(G)
      • R(g);SBLOCK,XP(L)::QAR(A)+B(D),DCHECK
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