MESON Chess Problem Database

Problem Display
PID: 132796 (1bR1R2B/rB6/1qNP4/r2k1b2/pPN5/K2P1n2/5p2/5Qn1 w - - 0 1)

Bettinger, Clark C

The Field, 1958

(First published on Thu Sep 18 1958)

1bR1R2B/rB6/1qNP4/r2k1b2/pPN5/K2P1n2/5p2/5Qn1

#2

11 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qe3
      • 2.Sxa7#
    • 1...Qd4
      • 2.Sxa7#
    • 1...Qd8
      • 2.Sxa7#
    • 1...Qxb4+
      • 2.Sxb4#
    • 1...Qxc6
      • 2.Bxc6#
    • 1...Be4
      • 2.dxe4#
    • 1...Be6
      • 2.Se7#
    • 1...Bxd6
      • 2.Sxb6#
    • 1...Se1
      • 2.Re5#
    • 1...Sd2
      • 2.Re5#
    • 1...Sh2
      • 2.Re5#
    • 1...Sd4
      • 2.Re5#
    • 1...Sh4
      • 2.Re5#
    • 1...Se5
      • 2.Rxe5#
    • 1...Sg5
      • 2.Re5#
  • Tries
    • 1.S6xa5+?
      • 1...Qc6
        • 2.Bxc6#
      • 1...Qxb7
        • 2.Rc5#
      • 1...Rxb7!
    • 1.Sxa7+?
      • 1...Qc6
        • 2.Bxc6#
      • 1...Qxb7!
  • Keys
    • 1.Qg2!
      • threat
        • 2.Re5#
      • 1...Qxb4+
        • 2.Sxb4#
      • 1...Qxc6
        • 2.Bxc6#
      • 1...Bxd3
        • 2.Qg8#
      • 1...Bxd6
        • 2.Sxb6#
      • 1...Qe3
        • 2.Sxa7#
      • 1...Qd4
        • 2.Sxa7#
      • 1...Be4
        • 2.Qg8#
      • 1...Be6
        • 2.Se7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 8
  • Sets
    • Q(h);N_GUARD,P_PINP(C)::B(H)+S(F),XR(i)
    • Q(h);N_GUARD::B(H)+S(F),XR(i)
    • Q(h);CHECK,XP(D)::B(H)+S(F),DCHECK,XQ(h)
    • Q(h);OGATE,P_SPINQ(h),XS(F)::B(H),XQ(h)
    • B(g);OGATE::P(C),XB(g)
    • B(g);SBLOCK::B(H)+S(F),DCHECK
    • B(j);P_PINP(D),SBLOCK,XP(G)::S(E),XQ(h)
    • S(c);N_GUARD::R1(J)
    • S(c);N_GUARD::R1(J),XS(c)
  • Tries
    • Try
      • S(F);CHECK,XR(e)
      • Vars
        • Q(h);N_GUARD,P_SPINQ(h)::B(H),XQ(h)
        • Q(h);XB(H)::R1(I)
      • Refutation
        • R(i);XB(H)
    • Try
      • S(F);CHECK,XR(i)
      • Vars
        • Q(h);N_GUARD,P_SPINQ(h)::B(H),XQ(h)
      • Refutation
        • Q(h);XB(H)
  • Actual
    • Q(A);P_PINS(c)
    • Threat
      • R1(J)
    • Vars
      • Q(h);CHECK,XP(D)::B(H)+S(F),DCHECK,XQ(h)
      • Q(h);OGATE,P_SPINQ(h),XS(F)::B(H),XQ(h)
      • B(g);N_GUARD,XP(C)::QAB(A)
      • B(j);P_PINP(D),SBLOCK,XP(G)::S(E),XQ(h)
      • Q(h);N_GUARD,P_PINP(C)::B(H)+S(F),XR(i)
      • Q(h);N_GUARD::B(H)+S(F),XR(i)
      • B(g);N_GUARD,N_SPINS(c)::QAB(A)
      • B(g);SBLOCK::B(H)+S(F),DCHECK
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