MESON Chess Problem Database

Problem Display
PID: 84658 (4nqb1/p7/2p3Qp/3k4/1rN5/1p1N1p2/3K4/2R2BB1 w - - 0 1)

Fillery, William Edmund Frank

Saturday Night, 1955

4nqb1/p7/2p3Qp/3k4/1rN5/1p1N1p2/3K4/2R2BB1

#2

7 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qc5
      • 2.Sf4#
      • 2.Qf5#
    • 1...Qe7
      • 2.Sf4#
    • 1...Qg7
      • 2.Sxb4#
      • 2.Sf4#
    • 1...Qf4+
      • 2.Sxf4#
    • 1...Qf5
      • 2.Qxf5#
    • 1...Qf7
      • 2.Sxb4#
    • 1...Bf7
      • 2.Sf4#
      • 2.Qf5#
    • 1...Sd6
      • 2.Sxb4#
    • 1...Sf6
      • 2.Sf4#
      • 2.Qf5#
  • Tries
    • 1.Sb6+?
      • 1...axb6
        • 2.Qxc6#
      • 1...Rxb6!
    • 1.Qh5+?
      • 1...Ke4
        • 2.Re1#
        • 2.Qe5#
      • 1...Qf5
        • 2.Qxf5#
      • 1...Ke6!
  • Keys
    • 1.Re1!
      • threat
        • 2.Qe4#
      • 1...Qf4+
        • 2.Sxf4#
      • 1...Kxc4
        • 2.Sf4#
      • 1...Rxc4
        • 2.Re5#
      • 1...Qe7
        • 2.Sf4#
      • 1...Qf5
        • 2.Sxb4#
      • 1...Bh7
        • 2.Qe6#
      • 1...Sd6
        • 2.Sxb4#
      • 1...Sf6
        • 2.Sf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • Q(i);N_GUARD::S(E)
    • Q(i);CHECK,N_GUARD::S(E),XQ(i)
    • Q(i);N_GUARD::QAR2(G),XQ(i)
    • Q(i);N_GUARD::S(E),XR(c)
    • S(h);S_CUTQ(i)::S(E),XR(c)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • P(g);XS(F)::QAB1(G),XP(e)
      • Refutation
        • R(c);XS(F)
    • Try
      • Q(G);CHECK
      • Vars
        • Q(i);N_GUARD,P_SPINQ(i)::QAR2(G),XQ(i)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • R(A);
    • Threat
      • QAB1(G)
    • Vars
      • Q(i);CHECK,N_GUARD::S(E),XQ(i)
      • K(d);S_FLIGHT,XS(F)::B(B)+S(E)
      • R(c);SBLOCK,XS(F)::R1(A)
      • Q(i);N_GUARD::S(E)
      • Q(i);N_GUARD::S(E),XR(c)
      • B(j);N_GUARD::QAB1(G)
      • S(h);S_CUTQ(i)::S(E),XR(c)
      • S(h);S_CUTQ(i)::S(E)
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