MESON Chess Problem Database

Problem Display
PID: 829 (5Bn1/3NrB2/K3P2R/N1Pkrp2/4bQ2/2PpPn2/2q1P3/3R4 w - - 0 1)

Driver, John Edward

2nd Prize, British Chess Magazine, 1968

5Bn1/3NrB2/K3P2R/N1Pkrp2/4bQ2/2PpPn2/2q1P3/3R4

#2

13 + 9

3751 FIDE Album (1968-1970) 1977

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.c4#
    • 1...Qxd1
      • 2.c4#
    • 1...Qb2
      • 2.c4#
    • 1...Qd2
      • 2.c4#
    • 1...Qxe2
      • 2.c4#
    • 1...R5xe6+
      • 2.Qd6#
    • 1...R7xe6+
      • 2.Sb6#
    • 1...Rxf7
      • 2.Sb6#
    • 1...Re8
      • 2.Sb6#
    • 1...Se1
      • 2.Qxe5#
    • 1...Sg1
      • 2.Qxe5#
    • 1...Sd2
      • 2.Qxe5#
    • 1...Sh2
      • 2.Qxe5#
    • 1...Sd4
      • 2.Qxe5#
    • 1...Sh4
      • 2.Qxe5#
    • 1...Sg5
      • 2.Qxe5#
  • Keys
    • 1.exd3!
      • threat
        • 2.dxe4#
      • 1...Qxd3+
        • 2.c4#
      • 1...R5xe6+
        • 2.Qd6#
      • 1...R7xe6+
        • 2.Sb6#
      • 1...Bxd3+
        • 2.Qc4#
      • 1...Qxd1
        • 2.c4#
      • 1...Qd2
        • 2.c4#
      • 1...Qe2
        • 2.c4#
      • 1...Sd2
        • 2.Qxe5#
      • 1...Sd4
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 9
  • Sets
    • Q(a);N_GUARD::P(C)
    • Q(a);N_GUARD,N_SPINP(b),XR(A)::P(C)
    • Q(a);N_GUARD,N_SPINP(b)::P(C)
    • Q(a);N_GUARD,XP(B)::P(C)
    • R(f);CHECK,OGATE,P_SPINR(f),XP(I)::QAR1(E)
    • R(h);CHECK,P_SPINR(h),XP(I)::S(K)
    • R(h);XB(L)::S(K)
    • R(h);::S(K)
    • S(c);N_GUARD::QAR1(E),XR(f)
    • S(c);N_GUARD,N_SPINP(b)::QAR1(E),XR(f)
  • Actual
    • P(B);XP(b)
    • Threat
      • R(A)+P(B)DCHECK,XB(d)
    • Vars
      • Q(a);CHECK,N_GUARD,P_SPINQ(a),XP(B)::P(C)
      • R(f);CHECK,OGATE,P_SPINR(f),XP(I)::QAR1(E)
      • R(h);CHECK,P_SPINR(h),XP(I)::S(K)
      • B(d);CHECK,OGATE,P_SPINB(d),XP(B)::QAB1(E)
      • Q(a);N_GUARD,XR(A)::P(C)
      • Q(a);N_GUARD::P(C)
      • Q(a);N_GUARD,P_PINP(B)::P(C)
      • S(c);N_GUARD::QAR1(E),XR(f)
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