MESON Chess Problem Database

Problem Display
PID: 124321 (3KR3/3Qp1q1/8/5Pp1/4k1P1/3rpN2/3rN1P1/1B6 w - - 0 1)

Legentil, Georges

Problemes d'Echecs (Legentil), 1951

3KR3/3Qp1q1/8/5Pp1/4k1P1/3rpN2/3rN1P1/1B6

#2

9 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4
      • 2.Qxd4#
    • 1...Qe5
      • 2.Sxg5#
    • 1...Qh6
      • 2.Qd4#
    • 1...Qf8
      • 2.Qd4#
    • 1...Qg6
      • 2.Qd4#
    • 1...Qf7
      • 2.Qd4#
    • 1...Qh7
      • 2.Qd4#
    • 1...Qg8
      • 2.Qd4#
    • 1...Ra2
      • 2.Bxd3#
      • 2.Qxd3#
    • 1...Rb2
      • 2.Bxd3#
      • 2.Qxd3#
    • 1...e5
      • 2.Qd4#
  • Tries
    • 1.Sxg5+?
      • 1...Qxg5
        • 2.Qd4#
      • 1...Ke5!
    • 1.Rxe7+?
      • 1...Qe5
        • 2.Sxg5#
        • 2.Rxe5#
        • 2.Qd4#
      • 1...Qxe7+!
  • Keys
    • 1.Qd6!
      • threat
        • 2.Sg3#
      • 1...Rxe2
        • 2.Bxd3#
      • 1...Qe5
        • 2.Sxg5#
      • 1...e5
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • Q(g);N_GUARD::QAR1(G),XQ(g)
    • Q(g);N_GUARD,N_SPINP(f),SBLOCK::S(D),XP(e)
    • Q(g);N_GUARD::QAR1(G)
    • Q(g);N_GUARD,P_PINR(I)::QAR1(G)
    • P(f);S_CUTQ(g)::QAR1(G)
  • Tries
    • Try
      • S(D);CHECK,XP(e)
      • Vars
        • Q(g);XS(D)::QAR1(G)
      • Refutation
        • K(d);N_SPINR(b),P-FLIGHT
    • Try
      • R(I);CHECK,XP(f)
      • Refutation
        • Q(g);CHECK,XR(I)
  • Actual
    • Q(G);
    • Threat
      • S(B)
    • Vars
      • R(a);N_GUARD,XS(B)::B(A),XR(b)
      • Q(g);N_GUARD,N_SPINP(f)::S(D),XP(e)
      • P(f);S_CUTQ(g)::QAR1(G)
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