MESON Chess Problem Database

Problem Display
PID: 10577 (1B1R4/2n1p3/1Q1brp2/r3kpnR/1N2p1q1/2p3P1/p2PbN2/K7 w - - 0 1)

Driver, John Edward

2nd Prize, BCF 113. Ty., 1966-1967

1B1R4/2n1p3/1Q1brp2/r3kpnR/1N2p1q1/2p3P1/p2PbN2/K7

#2

9 + 14

5862 An ABC of Chess Problems 1970
56 The Problemist 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5
      • 2.Sc6#
    • 1...Bxb4
      • 2.Qd4#
    • 1...Bc5
      • 2.Rd5#
    • 1...Sf3
      • 2.Sxg4#
    • 1...Sb5
      • 2.Qc5#
    • 1...Sd5
      • 2.Sc6#
  • Tries
    • 1.Qc5+?
      • 1...Bxc5
        • 2.Rd5#
      • 1...Sd5
        • 2.Sc6#
      • 1...Rxc5!
  • Keys
    • 1.Qe3!
      • threat
        • 2.Qxc3#
        • 2.d4#
      • 1...Qxg3
        • 2.d4#
      • 1...Bxb4
        • 2.Qd4#
        • 2.d4#
      • 1...cxd2
        • 2.Qc3#
      • 1...f4
        • 2.Qxe4#
      • 1...Qf3
        • 2.d4#
      • 1...Ra3
        • 2.d4#
      • 1...Rc5
        • 2.d4#
      • 1...Rd5
        • 2.Sc6#
      • 1...Bd3
        • 2.Sfxd3#
      • 1...Bc5
        • 2.Rd5#
      • 1...Sf3
        • 2.Sxg4#
      • 1...Sb5
        • 2.Qc5#
      • 1...Sd5
        • 2.Sc6#
        • 2.d4#
      • 1...c2
        • 2.Qc3#
        • 2.d4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 2
  • Sets
    • R(f);SBLOCK::S(E)
    • B(j);P_SPINS(m),XS(E)::QAB1(G)
    • B(j);OGATE,P_SPINS(m)::R1(I)
    • S(i);P_SPINP(h),S_CUTB(b)::S(C),XQ(e)
    • S(m);N_GUARD,P_SPINB(j),S_CUTR(f)::QAR2(G)
    • S(m);P_SPINB(j),SBLOCK::S(E)
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • B(j);OGATE,P_SPINS(m),XQ(G)::R1(I)
        • S(m);P_SPINB(j),P_SPINS(m)::S(E)
      • Refutation
        • R(f);XQ(G)
  • Actual
    • Q(G);P_PINP(d)
    • Threat
      • DUALS(2)
    • Vars
      • Q(e);XP(D)::P(B)
      • P(c);XP(B)::QAB(G)
      • P(h);N_GUARD,P_SPINS(i),S_CUTQ(e)::QAR1(G),XP(d)
      • Q(e);::P(B)
      • R(f);::P(B)
      • R(f);SBLOCK::S(E)
      • B(b);N_GUARD::S(C),XB(b)
      • B(j);OGATE,P_SPINS(m)::R1(I)
      • S(i);S_CUTB(b),S_CUTP(h)::S(C),XQ(e)
      • S(m);N_GUARD,P_SPINB(j),S_CUTR(f)::QAR2(G)
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