MESON Chess Problem Database

Problem Display
PID: 44771 (4NK2/Q7/2nr4/1R2pn2/1RrpkBB1/1Pb3P1/4Pq2/1N6 w - - 0 1)

Vansittart, Cyril Bexley

Burnley Express, 1881

4NK2/Q7/2nr4/1R2pn2/1RrpkBB1/1Pb3P1/4Pq2/1N6

#2

11 + 9

56 The Problemist 2002

SOLUTION

  • SOUND
  • Sets
    • 1...Qe1
      • 2.Bf3#
    • 1...Qg1
      • 2.Bf3#
    • 1...Qh2
      • 2.Bf3#
    • 1...Qf3
      • 2.Bxf3#
    • 1...Rd5
      • 2.Sf6#
    • 1...Rf6+
      • 2.Sxf6#
    • 1...Rd7
      • 2.Sf6#
    • 1...Ba1
      • 2.Sd2#
    • 1...Bb2
      • 2.Sd2#
    • 1...Bd2
      • 2.Sxd2#
    • 1...Se3
      • 2.Sxd6#
    • 1...Sh4
      • 2.Sxd6#
    • 1...Sh6
      • 2.Sxd6#
    • 1...Sfe7
      • 2.Sxd6#
    • 1...Sg7
      • 2.Sxd6#
    • 1...Sxb4
      • 2.Rxe5#
    • 1...Sa5
      • 2.Rxe5#
    • 1...Sxa7
      • 2.Rxe5#
    • 1...Sce7
      • 2.Rxe5#
    • 1...Sb8
      • 2.Rxe5#
    • 1...Sd8
      • 2.Rxe5#
    • 1...d3
      • 2.Sxc3#
  • Keys
    • 1.Qxd4+!
      • 1...Kxd4
        • 2.Rxc4#
      • 1...Qxd4
        • 2.Bf3#
      • 1...Rcxd4
        • 2.Sxc3#
      • 1...Rdxd4
        • 2.Sf6#
      • 1...Bxd4
        • 2.Sd2#
      • 1...Sfxd4
        • 2.Sxd6#
      • 1...Scxd4
        • 2.Rxe5#
      • 1...exd4
        • 2.Bxf5#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 22
  • Sets
    • Q(a);N_GUARD::B(G)
    • Q(a);N_GUARD::B(G),XQ(a)
    • R(i);N_GUARD::S(J)
    • R(i);CHECK,N_GUARD::S(J),XR(i)
    • B(b);N_GUARD::S(A)
    • B(b);N_GUARD::S(A),XB(b)
    • S(g);N_GUARD,P_PINB(F)::S(J),XR(i)
    • S(h);N_GUARD,XR(E)::R1(H),XP(f)
    • S(h);N_GUARD::R1(H),XP(f)
    • S(h);N_GUARD,XQ(I)::R1(H),XP(f)
    • P(d);N_GUARD,P_SPINR(c)::S(A),XB(b)
  • Actual
    • Q(I);CHECK,XP(d)
    • Vars
      • K(e);P-FLIGHT,P_SPINR(c),XQ(I)::R1(E),XR(c)
      • Q(a);SBLOCK,XQ(I)::B(G)
      • R(c);P_SPINR(c),XQ(I)::S(A),XB(b)
      • R(i);SBLOCK,XQ(I)::S(J)
      • B(b);SBLOCK,XQ(I)::S(A)
      • S(g);P_PINB(F),SBLOCK,XQ(I)::S(J),XR(i)
      • S(h);SBLOCK,XQ(I)::R1(H),XP(f)
      • P(f);SBLOCK,XQ(I)::B(G),XS(g)
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Developed and maintained by Brian Stephenson.
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