MESON Chess Problem Database

Problem Display
PID: 120643 (8/8/8/Q3b3/4p1K1/4k3/3R4/8 w - - 0 1)

Legentil, Georges

Problemes d'Echecs (Legentil), 1951

8/8/8/Q3b3/4p1K1/4k3/3R4/8

#2

3 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ba1
      • 2.Qg5#
    • 1...Bb2
      • 2.Qg5#
    • 1...Bh2
      • 2.Qc3#
    • 1...Bc3
      • 2.Qxc3#
      • 2.Qg5#
    • 1...Bg3
      • 2.Qc3#
    • 1...Bd4
      • 2.Qg5#
    • 1...Bf4
      • 2.Qc3#
    • 1...Bd6
      • 2.Qc3#
    • 1...Bc7
      • 2.Qc3#
    • 1...Bg7
      • 2.Qg5#
    • 1...Bb8
      • 2.Qc3#
    • 1...Bh8
      • 2.Qg5#
  • Tries
    • 1.Rd1?
      • threat
        • 2.Qe1#
        • 2.Qd2#
      • 1...Ke2
        • 2.Qe1#
        • 2.Qd2#
      • 1...Kf2
        • 2.Qd2#
      • 1...Bg3
        • 2.Qd2#
      • 1...Bc3!
    • 1.Qb6+?
      • 1...Bd4
        • 2.Qxd4#
        • 2.Qh6#
      • 1...Kxd2!
    • 1.Qa3+?
      • 1...Bc3
        • 2.Qxc3#
      • 1...Kxd2!
    • 1.Qc5+?
      • 1...Bd4
        • 2.Qxd4#
        • 2.Qg5#
      • 1...Kxd2!
    • 1.Qd5?
      • 1...Bd4
        • 2.Qxd4#
        • 2.Qg5#
      • 1...Ba1
        • 2.Qg5#
      • 1...Bb2
        • 2.Qg5#
      • 1...Bh2
        • 2.Qd4#
      • 1...Bc3
        • 2.Qg5#
      • 1...Bg3
        • 2.Qd4#
      • 1...Bf4
        • 2.Qd4#
      • 1...Bd6
        • 2.Qd4#
      • 1...Bc7
        • 2.Qd4#
      • 1...Bg7
        • 2.Qg5#
      • 1...Bb8
        • 2.Qd4#
      • 1...Bh8
        • 2.Qg5#
      • 1...Bf6!
    • 1.Qa7+?
      • 1...Bd4
        • 2.Qxd4#
      • 1...Kxd2!
  • Keys
    • 1.Rc2!
      • threat
        • 2.Qd2#
      • 1...Kd3
        • 2.Qd2#
      • 1...Kd4
        • 2.Qd2#
      • 1...Bc3
        • 2.Qxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 11
  • Sets
    • B(c);OGATE::QAB(C)
    • B(c);N_GUARD::QAR2(C)
  • Tries
    • Try
      • R(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);S_FLIGHT::QAR2(C)
        • B(c);::QAB1(C)
      • Refutation
        • B(c);
    • Try
      • Q(C);CHECK
      • Refutation
        • K(a);S_FLIGHT,XR(A)
    • Try
      • Q(C);CHECK
      • Vars
        • B(c);N_GUARD,P_SPINB(c)::QAR2(C),XB(c)
      • Refutation
        • K(a);S_FLIGHT,XR(A)
    • Try
      • Q(C);CHECK
      • Refutation
        • K(a);S_FLIGHT,XR(A)
    • Try
      • Q(C);
      • Vars
        • B(c);OGATE::QAB(C)
        • B(c);N_GUARD::QAB1(C)
      • Refutation
        • B(c);
    • Try
      • Q(C);CHECK
      • Vars
        • B(c);N_GUARD,P_SPINB(c)::QAB1(C),XB(c)
      • Refutation
        • K(a);S_FLIGHT,XR(A)
  • Actual
    • R(A);
    • Threat
      • QAB1(C)
    • Vars
      • K(a);P-FLIGHT::QAR1(C)
      • K(a);S_FLIGHT::QAR2(C)
      • B(c);N_GUARD::QAR2(C),XB(c)
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