MESON Chess Problem Database

Problem Display
PID: 430 (K6Q/1NR1R3/p3P2p/r2k3r/1B1nn3/1P1p3q/8/b2N3B w - - 0 1)

Mansfield, Comins

The Observer, 1948

(First published on Sun Mar 21 1948)

K6Q/1NR1R3/p3P2p/r2k3r/1B1nn3/1P1p3q/8/b2N3B

#2

10 + 10

3550 Complete Mansfield/II 1997
15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qf1
      • 2.Se3#
    • 1...Qg2
      • 2.Se3#
    • 1...Qg4
      • 2.Se3#
    • 1...Qf5
      • 2.Se3#
    • 1...Qxe6
      • 2.Se3#
    • 1...Qxh1
      • 2.Se3#
    • 1...Qh2
      • 2.Se3#
    • 1...Qe3
      • 2.Sxe3#
    • 1...Qh4
      • 2.Se3#
    • 1...Ra2
      • 2.Rc5#
    • 1...Ra3
      • 2.Rc5#
    • 1...Ra4
      • 2.Rc5#
    • 1...Rc5
      • 2.Rxc5#
    • 1...Re5
      • 2.Qd8#
    • 1...Bc3
      • 2.Sxc3#
    • 1...Sf3
      • 2.Se3#
    • 1...Sb5
      • 2.Rc5#
    • 1...Sc6
      • 2.Rcd7#
    • 1...Sxe6
      • 2.Red7#
  • Keys
    • 1.Bc3!
      • threat
        • 2.Qxd4#
      • 1...Bxc3
        • 2.Sxc3#
      • 1...Sxb3
        • 2.Qd8#
      • 1...Sxe6
        • 2.Red7#
      • 1...Qe3
        • 2.Sxe3#
      • 1...Ra4
        • 2.Rc5#
      • 1...Re5
        • 2.Qd8#
      • 1...Sc2
        • 2.Qd8#
      • 1...Se2
        • 2.Qd8#
      • 1...Sf3
        • 2.Se3#
      • 1...Sb5
        • 2.Rc5#
      • 1...Sf5
        • 2.Qe5#
      • 1...Sc6
        • 2.Rcd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 11
  • Sets
    • Q(c);N_GUARD::S(A)
    • Q(c);N_GUARD,N_SPINS(e)::S(A)
    • Q(c);N_GUARD,XP(E)::S(A)
    • Q(c);N_GUARD,N_SPINS(e),XB(B)::S(A)
    • Q(c);N_GUARD::S(A),XQ(c)
    • R(f);N_GUARD::R1(G)
    • R(f);N_GUARD::R1(G),XR(f)
    • R(h);SBLOCK::QAR(J)
    • B(a);N_GUARD::S(A),XB(a)
    • S(d);N_SPINS(e),S_CUTQ(c)::S(A)
    • S(d);S_CUTR(f)::R1(G)
    • S(d);SBLOCK::R(G)
    • S(d);SBLOCK,XP(E)::R(H)
  • Actual
    • B(D);
    • Threat
      • QAR1(J),XS(d)
    • Vars
      • B(a);XB(D)::S(A),XB(a)
      • S(d);XP(C)::QAR(J)
      • S(d);SBLOCK,XP(E)::R(H)
      • Q(c);N_GUARD::S(A),XQ(c)
      • R(f);N_GUARD::R1(G)
      • R(h);SBLOCK::QAR(J)
      • S(d);::QAR(J)
      • S(d);N_SPINS(e),S_CUTQ(c)::S(A)
      • S(d);S_CUTR(f)::R1(G)
      • S(d);S_CUTR(h)::QAR1(J)
      • S(d);SBLOCK::R(G)
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