MESON Chess Problem Database

Problem Display
PID: 28525 (3rN3/4Qq2/1bP1ppn1/2p3pb/N1P1k1B1/Kp1p1pP1/3R1P2/B7 w - - 0 1)

Gooderson, Arthur R

Comm., British Chess Magazine, 1977

3rN3/4Qq2/1bP1ppn1/2p3pb/N1P1k1B1/Kp1p1pP1/3R1P2/B7

#2

11 + 13

3207 A R Gooderson An English Progressive 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Qg8
      • 2.Sxf6#
    • 1...Qh7
      • 2.Sxf6#
    • 1...Rd6
      • 2.Sxd6#
    • 1...Ra8
      • 2.Sd6#
    • 1...Rb8
      • 2.Sd6#
    • 1...Rc8
      • 2.Sd6#
    • 1...Ba5
      • 2.Sxc5#
    • 1...Bc7
      • 2.Sxc5#
  • Tries
    • 1.Qxc5?
      • threat
        • 2.Sc3#
      • 1...Bxc5+
        • 2.Sxc5#
      • 1...Qa7
        • 2.Sxf6#
      • 1...Ra8
        • 2.Sd6#
      • 1...Ba5
        • 2.Qe3#
      • 1...Rd5!
    • 1.Qd6?
      • threat
        • 2.Sc3#
      • 1...Rxd6
        • 2.Sxd6#
      • 1...Qa7
        • 2.Sxf6#
      • 1...Ra8
        • 2.Qxd3#
      • 1...Ba5
        • 2.Sxc5#
      • 1...Bxg4!
    • 1.Qxd8?
      • threat
        • 2.Sd6#
        • 2.Qxd3#
      • 1...Qxe8
        • 2.Qxd3#
      • 1...Bxd8
        • 2.Sxc5#
        • 2.Sd6#
      • 1...Qc7
        • 2.Sxf6#
        • 2.Qxd3#
      • 1...Qd7
        • 2.Sxf6#
      • 1...Qe7
        • 2.Qxd3#
      • 1...Qf8
        • 2.Qxd3#
      • 1...Bc7
        • 2.Sxc5#
        • 2.Qxd3#
      • 1...Sf4
        • 2.Sd6#
      • 1...Se5
        • 2.Sc3#
        • 2.Sd6#
      • 1...b2!
    • 1.Qxe6+?
      • 1...Se5
        • 2.Bf5#
        • 2.Qf5#
      • 1...Qxe6!
  • Keys
    • 1.Qxf6!
      • threat
        • 2.Sc3#
      • 1...Qxf6
        • 2.Sxf6#
      • 1...Qa7
        • 2.Qxf3#
      • 1...Ra8
        • 2.Sd6#
      • 1...Ba5
        • 2.Sxc5#
      • 1...Se5
        • 2.Qxe5#
      • 1...e5
        • 2.Bf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • Q(l);N_GUARD::S(K),XP(j)
    • R(m);N_GUARD::S(K),XR(m)
    • R(m);N_GUARD,P_PINS(F)::S(K)
    • R(m);N_GUARD::S(K)
    • B(h);N_GUARD::S(F),XP(e)
  • Tries
    • Try
      • Q(J);N_PINP(i),XP(e)
      • Threat
        • S(F)
      • Vars
        • B(h);CHECK,XQ(J)::S(F),XB(h)
        • Q(l);N_GUARD,P_PINS(F)::S(K),XP(j)
        • R(m);N_GUARD,P_PINS(F)::S(K)
        • B(h);N_GUARD::QAR1(J)
      • Refutation
        • R(m);
    • Try
      • Q(J);N_PINP(i)
      • Threat
        • S(F)
      • Vars
        • R(m);XQ(J)::S(K),XR(m)
        • Q(l);N_GUARD,P_PINS(F)::S(K),XP(j)
        • R(m);N_GUARD,P_PINS(F)::QAB1(J),XP(b)
        • B(h);N_GUARD::S(F),XP(e)
      • Refutation
        • B(g);XB(H)
    • Try
      • Q(J);N_PINP(i),XR(m)
      • Threat
        • DUALS(2)
      • Vars
        • Q(l);XS(K)::QAB1(J),XP(b)
        • Q(l);N_GUARD::S(K),XP(j)
        • Q(l);::QAB1(J),XP(b)
        • S(k);::S(K)
      • Refutation
        • P(a);
    • Try
      • Q(J);CHECK,XP(i)
      • Refutation
        • Q(l);XQ(J)
  • Actual
    • Q(J);N_PINP(i),XP(j)
    • Threat
      • S(F)
    • Vars
      • Q(l);XQ(J)::S(K),XQ(l)
      • Q(l);N_GUARD,P_PINS(F)::QAB1(J),XP(c)
      • R(m);N_GUARD,P_PINS(F)::S(K)
      • B(h);N_GUARD::S(F),XP(e)
      • S(k);N_GUARD::QAR1(J),XS(k)
      • P(i);N_GUARD::B(H)
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