MESON Chess Problem Database

Problem Display
PID: 124331 (1r1b4/1r1Q1N1K/Rq3k1P/4N2p/4RP1p/8/8/8 w - - 0 1)

Legentil, Georges

Problemes d'Echecs (Legentil), 1951

1r1b4/1r1Q1N1K/Rq3k1P/4N2p/4RP1p/8/8/8

#2

8 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qc6
      • 2.Rxc6#
    • 1...Qd6
      • 2.Rxd6#
    • 1...Qe6
      • 2.Qxe6#
  • Tries
    • 1.Qf5+?
      • 1...Ke7
        • 2.Sg6#
      • 1...Kxf5!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Se8#
      • 1...Rxd7+
        • 2.Sxd7#
      • 1...Qxd6
        • 2.Rxd6#
      • 1...Bc7
        • 2.Qf7#
      • 1...Be7
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • Q(c);OGATE::R(D),XQ(c)
    • Q(c);N_GUARD::QAR1(F),XQ(c)
  • Tries
    • Try
      • Q(F);CHECK,P_SPINS(G)
      • Vars
        • K(d);N_PINS(G),N_SPINQ(c),S_FLIGHT::R(A)+S(C),DCHECK
      • Refutation
        • K(d);N_SPINQ(c),P-FLIGHT,XQ(F)
  • Actual
    • S(G);N_PINQ(c),P_SPINQ(F)
    • Threat
      • S(G)
    • Vars
      • R(e);CHECK,XQ(F)::S(C),XR(e)
      • Q(c);OGATE,P_SPINQ(c),XS(G)::R(D),XQ(c)
      • B(g);N_PINQ(F),S_CUTR(e)::QAR1(F)
      • B(g);N_PINQ(F),SBLOCK::QAR1(F)
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