MESON Chess Problem Database

Problem Display
PID: 133203 (3Rqb2/2N1Q3/1KPp4/1p1rN2p/3kp1nR/Bb6/n2PB3/1r6 w - - 0 1)

Sumner, Christopher Richard Benson

The Field, 1960

(First published on Thu Jun 23 1960)

3Rqb2/2N1Q3/1KPp4/1p1rN2p/3kp1nR/Bb6/n2PB3/1r6

#2

10 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc6+
      • 2.Sxc6#
    • 1...Rc5
      • 2.Bxc5#
    • 1...Sf2
      • 2.Sf3#
    • 1...Se3
      • 2.Sf3#
    • 1...Sxe5
      • 2.Se6#
    • 1...Sf6
      • 2.Sf3#
    • 1...Sh6
      • 2.Sf3#
    • 1...e3
      • 2.Sf3#
    • 1...dxe5
      • 2.Sxb5#
      • 2.Se6#
      • 2.Bc5#
  • Tries
    • 1.Bb2+?
      • 1...Sc3
        • 2.Bxc3#
      • 1...Rxb2!
    • 1.Bc5+?
      • 1...dxc5
        • 2.Sxb5#
      • 1...Rxc5!
  • Keys
    • 1.Qf6!
      • threat
        • 2.Sf3#
      • 1...Qxc6+
        • 2.Sxc6#
      • 1...Qxe5
        • 2.Se6#
      • 1...Rxe5
        • 2.Bc5#
      • 1...Sxe5
        • 2.Qf2#
      • 1...dxe5
        • 2.Sxb5#
      • 1...e3
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • Q(k);CHECK,XP(G)::S(E),XQ(k)
    • R(h);N_GUARD,P_SPINP(j)::B(C),XR(h)
    • S(f);P_SPINP(e)::S(E)
    • S(f);P_SPINP(e),SBLOCK,XS(E)::S(H)
    • P(e);N_GUARD,P_SPINS(f)::S(E)
  • Tries
    • Try
      • B(C);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::B(C),XS(b)
      • Refutation
        • R(a);XB(C)
    • Try
      • B(C);CHECK
      • Vars
        • P(j);P_SPINR(h),XB(C)::S(H),XP(g)
      • Refutation
        • R(h);P_SPINP(j),XB(C)
  • Actual
    • Q(I);
    • Threat
      • QAB(I)+S(E),DCHECK
    • Vars
      • Q(k);CHECK,XP(G)::QAB(I)+S(E),DCHECK,XQ(k)
      • Q(k);N_GUARD,P_SPINQ(k),XS(E)::S(H)
      • R(h);N_GUARD,P_SPINP(j),P_SPINR(h),XS(E)::B(C)
      • S(f);N_GUARD,P_SPINP(e),P_SPINS(f),SBLOCK,XS(E)::QAB(I)
      • P(j);P_SPINP(j),P_SPINR(h),XS(E)::S(H),XP(g)
      • P(e);OGATEB,P_SPINS(f)::QAR2(I)
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Developed and maintained by Brian Stephenson.
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