MESON Chess Problem Database

Problem Display
PID: 133220 (Q1r5/1n1NB3/8/qR1r1k1P/Bp1P2p1/6P1/2N1R2n/2K5 w - - 0 1)

Ravenscroft, Frank

The Field, 1960

(First published on Thu Jul 28 1960)

Q1r5/1n1NB3/8/qR1r1k1P/Bp1P2p1/6P1/2N1R2n/2K5

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qb6
      • 2.Rxd5#
    • 1...Qd8
      • 2.Rxd5#
    • 1...Qxa4
      • 2.Rxd5#
    • 1...Qa6
      • 2.Rxd5#
    • 1...Qa7
      • 2.Rxd5#
    • 1...Qxa8
      • 2.Rxd5#
    • 1...Re5
      • 2.Rexe5#
    • 1...Rxc2+
      • 2.Bxc2#
    • 1...Rc3
      • 2.Qf8#
    • 1...Rc4
      • 2.Qf8#
    • 1...Rc5
      • 2.Qf8#
    • 1...Rc7
      • 2.Qf8#
    • 1...Rf8
      • 2.Qxf8#
    • 1...Sc5
      • 2.Qxd5#
    • 1...Sd6
      • 2.Qxd5#
    • 1...Sd8
      • 2.Qxd5#
  • Keys
    • 1.Sc5!
      • threat
        • 2.Se3#
      • 1...Rxd4
        • 2.Sxd4#
      • 1...Rdxc5
        • 2.Qxc8#
      • 1...Rcxc5
        • 2.Qf8#
      • 1...Sxc5
        • 2.Qxd5#
      • 1...Re5
        • 2.Rxe5#
      • 1...Sf1
        • 2.Rf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 13
  • Sets
    • Q(d);N_GUARD::R(G),XR(e)
    • Q(d);N_GUARD,XB(E)::R(G),XR(e)
    • Q(d);N_GUARD,XQ(K)::R(G),XR(e)
    • R(e);N_GUARD::R1(C),XR(e)
    • R(h);CHECK,OGATE,XS(B)::B(E),XR(h)
    • R(h);OGATE::QAR(K)
    • R(h);N_SPINR(e),OGATE::QAR(K)
    • R(h);N_PINS(B),OGATE::QAR(K),XR(h)
    • S(g);N_PINS(B),N_SPINR(e),OGATE::QAR2(K),XR(e)
    • S(g);OGATE::QAR2(K),XR(e)
  • Actual
    • S(I);N_PINR(e),N_SPINS(B)
    • Threat
      • S(B)
    • Vars
      • R(e);XP(F)::S(B),XR(e)
      • R(e);N_GUARD,P_PINS(B),P_SPINR(e),XS(I)::QAB(K),XR(h)
      • R(h);OGATE,P_PINS(B),XS(I)::QAR(K)
      • S(g);OGATE,XS(I)::QAR2(K),XR(e)
      • R(e);N_GUARD::R1(C),XR(e)
      • S(a);N_GUARD::R(C)
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