MESON Chess Problem Database

Problem Display
PID: 132405 (5K2/6pb/1R1p4/R3b3/2pkn1Q1/N4p2/3Ppr1r/1B2BnN1 w - - 0 1)

Driver, John Edward

The Field, 1956

(First published on Thu Dec 20 1956)

5K2/6pb/1R1p4/R3b3/2pkn1Q1/N4p2/3Ppr1r/1B2BnN1

#2

9 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Rfg2
      • 2.Sxf3#
    • 1...Bf6
      • 2.Rxd6#
    • 1...Bg8
      • 2.Qxe4#
    • 1...c3
      • 2.Rb4#
    • 1...g6
      • 2.Qxe4#
  • Tries
    • 1.Bxf2+?
      • 1...Se3
        • 2.Sxf3#
        • 2.Bxe3#
      • 1...Rxf2!
    • 1.Rb3?
      • threat
        • 2.Sc2#
      • 1...Se3
        • 2.dxe3#
      • 1...c3
        • 2.Rb4#
      • 1...cxb3!
  • Keys
    • 1.Qxf3!
      • threat
        • 2.Sc2#
      • 1...Rxf3+
        • 2.Sxf3#
      • 1...Sexd2
        • 2.Rd5#
      • 1...Se3
        • 2.dxe3#
      • 1...Sc3
        • 2.dxc3#
      • 1...Seg3
        • 2.Rd5#
      • 1...Sc5
        • 2.Sb5#
      • 1...Sg5
        • 2.Rd5#
      • 1...Sf6
        • 2.Qc3#
      • 1...c3
        • 2.Rb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 4
  • Sets
    • R(c);N_GUARD::S(C),XP(e)
    • B(i);N_GUARD::R(H),XP(j)
    • B(l);N_GUARD::QAR1(F),XS(h)
    • P(f);OGATEB::R(H)
    • P(k);S_CUTB(l)::QAR1(F),XS(h)
  • Tries
    • Try
      • B(B);CHECK,XR(c)
      • Refutation
        • R(d);XB(B)
    • Try
      • R(H);
      • Threat
        • S(E)
      • Vars
        • S(a);OGATE::P(D),XS(a)
        • P(f);OGATEB::R(H)
      • Refutation
        • P(f);XR(H)
  • Actual
    • Q(F);N_PINS(h),P_SPINQ(F),XP(e)
    • Threat
      • S(E)
    • Vars
      • R(c);CHECK,XQ(F)::S(C),XR(c)
      • S(h);XP(D)::R1(G)
      • S(a);OGATE::P(D),XS(a)
      • S(h);OGATE::P(D),XS(h)
      • S(h);::R1(G)
      • S(h);SBLOCK::S(E)
      • S(h);N_PINQ(F)::QAB1(F)
      • P(f);OGATEB::R(H)
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