MESON Chess Problem Database

Problem Display
PID: 134042 (4n2K/2r4b/1Q6/2rp1B2/1nkP3R/1Rq3p1/PB3N2/4b3 w - - 0 1)

Langstaff, William A

The Field, 1964

(First published on Thu Dec 24 1964)

4n2K/2r4b/1Q6/2rp1B2/1nkP3R/1Rq3p1/PB3N2/4b3

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd4+
      • 2.Rxd4#
    • 1...Ra7
      • 2.Qxc5#
    • 1...Rb7
      • 2.Qxc5#
    • 1...Rd7
      • 2.Qxc5#
    • 1...Re7
      • 2.Qxc5#
    • 1...Rf7
      • 2.Qxc5#
    • 1...Rg7
      • 2.Qxc5#
    • 1...Bxf2
      • 2.Rxc3#
    • 1...Sc6
      • 2.Qxc5#
  • Keys
    • 1.Sg4!
      • threat
        • 2.Se5#
      • 1...Kxd4
        • 2.Rxb4#
      • 1...Qe3
        • 2.Sxe3#
      • 1...Re7
        • 2.Qxc5#
      • 1...Sd3
        • 2.Se3#
      • 1...Sc6
        • 2.Qxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • Q(b);CHECK,OGATE,P_SPINQ(b),XP(E)::R1(F),XQ(b)
    • R(h);N_GUARD::QAR1(H),XR(f)
    • R(h);N_GUARD,N_PINP(E)::QAR1(H),XR(f)
    • B(a);N_GUARD,XS(C)::R1(D),XQ(b)
    • S(d);S_CUTR(h)::QAR1(H),XR(f)
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • K(e);P-FLIGHT,P_SPINQ(b),P_SPINR(f),XP(E)::R(D),XS(d)
      • Q(b);N_GUARD,N_PINP(E)::S(C),XQ(b)
      • R(h);N_GUARD::QAR1(H),XR(f)
      • S(d);S_CUTQ(b)::S(C)
      • S(d);S_CUTR(h)::QAR1(H),XR(f)
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