MESON Chess Problem Database

Problem Display
PID: 108829 (1rRq3k/4p2P/4P2Q/r3p1K1/b3N3/2N5/8/BB6 w - - 0 1)

Legentil, Georges

Le Probleme, 1938

1rRq3k/4p2P/4P2Q/r3p1K1/b3N3/2N5/8/BB6

#2

9 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qg8+
      • 2.hxg8Q#
      • 2.hxg8S#
      • 2.hxg8B#
      • 2.hxg8R#
    • 1...Rb5
      • 2.Rxd8#
  • Tries
    • 1.Sb5?
      • threat
        • 2.Bxe5#
      • 1...Qg8+
        • 2.hxg8Q#
        • 2.hxg8S#
        • 2.hxg8B#
        • 2.hxg8R#
      • 1...Rbxb5
        • 2.Rxd8#
      • 1...Raxb5!
    • 1.Qf8+?
      • 1...Kxh7
        • 2.Sf6#
      • 1...Qxf8!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Sf7#
      • 1...Qg8+
        • 2.hxg8Q#
        • 2.hxg8S#
        • 2.hxg8B#
        • 2.hxg8R#
      • 1...e4+
        • 2.Scb5#
      • 1...exd6+
        • 2.Qf6#
      • 1...Be8
        • 2.Qf8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(e);N_GUARD,S_CUTB(a)::R(I),XQ(f)
  • Tries
    • Try
      • S(C);P_PINP(c)
      • Threat
        • B(A),XP(c)
      • Vars
        • R(e);N_GUARD,XS(C)::R(I),XQ(f)
      • Refutation
        • R(b);XS(C)
    • Try
      • Q(G);CHECK,N_PINQ(f)
      • Vars
        • K(g);P-FLIGHT,XP(H)::B(B)+S(D),DCHECK
      • Refutation
        • Q(f);P_SPINQ(f),XQ(G)
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • P(c);CHECK::B(A)+S(C)
      • P(d);CHECK,N_GUARD,XS(D)::QAB(G)
      • B(a);N_SPINQ(f),S_CUTQ(f)::QAR2(G)
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