MESON Chess Problem Database

Problem Display
PID: 71682 (5q2/2B4p/2p2p2/1P1knB2/P1R3p1/PNb5/1N2PnK1/5Q2 w - - 0 1)

Howard, David M

Problem Observer, 2006

5q2/2B4p/2p2p2/1P1knB2/P1R3p1/PNb5/1N2PnK1/5Q2

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qc5
      • 2.Rxc5#
    • 1...Qh6
      • 2.Rc5#
    • 1...Qg7
      • 2.Rc5#
    • 1...Qf7
      • 2.Rc5#
    • 1...Qa8
      • 2.Rc5#
    • 1...Qb8
      • 2.Rc5#
    • 1...Qc8
      • 2.Rc5#
    • 1...Qd8
      • 2.Rc5#
    • 1...Qe8
      • 2.Rc5#
    • 1...Qg8
      • 2.Rc5#
    • 1...Qh8
      • 2.Rc5#
    • 1...Be1
      • 2.Rd4#
    • 1...Bd2
      • 2.Rd4#
    • 1...Bb4
      • 2.Rd4#
    • 1...Bd4
      • 2.Rxd4#
    • 1...Ba5
      • 2.Rd4#
    • 1...Sd1
      • 2.e4#
    • 1...Sh1
      • 2.e4#
    • 1...Sfd3
      • 2.e4#
    • 1...Sh3
      • 2.e4#
  • Tries
    • 1.Qd1+?
      • 1...Bd2
        • 2.Rd4#
      • 1...Bd4
        • 2.Rxd4#
        • 2.Qxd4#
      • 1...Sxd1
        • 2.e4#
      • 1...Sfd3
        • 2.e4#
      • 1...Sed3!
  • Keys
    • 1.Sd1!
      • threat
        • 2.Se3#
      • 1...Kxc4
        • 2.Be6#
      • 1...Sxd1
        • 2.e4#
      • 1...Sxc4
        • 2.Sxc3#
      • 1...Qc5
        • 2.Rxc5#
      • 1...Qh6
        • 2.Rc5#
      • 1...Bd2
        • 2.Rd4#
      • 1...Bd4
        • 2.Rxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 15
  • Sets
    • Q(i);N_GUARD::R1(H),XQ(i)
    • Q(i);N_GUARD::R1(H)
    • B(b);N_GUARD::R1(H)
    • B(b);N_GUARD::R1(H),XB(b)
    • S(a);N_GUARD::P(C)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • B(b);N_GUARD,P_SPINB(b)::R1(H)
        • S(a);XQ(A)::P(C)
        • S(a);P_SPINS(a)::P(C)
      • Refutation
        • S(e);P_SPINS(e)
  • Actual
    • S(B);
    • Threat
      • S(B)
    • Vars
      • K(d);S_FLIGHT,XR(H)::B(J)
      • S(a);N_GUARD,XS(B)::P(C)
      • S(e);SBLOCK,XR(H)::S(B),XB(b)
      • Q(i);N_GUARD::R1(H),XQ(i)
      • Q(i);N_GUARD::R1(H)
      • B(b);N_GUARD::R1(H)
      • B(b);N_GUARD::R1(H),XB(b)
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