MESON Chess Problem Database

Problem Display
PID: 10198 (BB2N3/2r1p3/n3p3/R1bqk3/2p3P1/p2pPpP1/Q2N4/2K1Rn2 w - - 0 1)

Gooderson, Arthur R

The Problemist, 1962

BB2N3/2r1p3/n3p3/R1bqk3/2p3P1/p2pPpP1/Q2N4/2K1Rn2

#2

11 + 12

3207 A R Gooderson An English Progressive 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4
      • 2.Sxf3#
    • 1...Qd6
      • 2.Sxf3#
      • 2.Sxc4#
    • 1...Qd7
      • 2.Sxf3#
      • 2.Sxc4#
    • 1...Qd8
      • 2.Sxf3#
      • 2.Sxc4#
  • Tries
    • 1.Qa1+?
      • 1...Qd4
        • 2.Sxf3#
        • 2.Sxc4#
        • 2.Qxd4#
        • 2.exd4#
      • 1...Bd4
        • 2.Qxd4#
        • 2.exd4#
      • 1...c3!
  • Keys
    • 1.Qxc4!
      • threat
        • 2.Qf4#
      • 1...Qxc4+
        • 2.Sxc4#
      • 1...Qxa8
        • 2.Qd4#
      • 1...Bxe3
        • 2.Qc3#
      • 1...Qe4
        • 2.Qxe4#
      • 1...Qc6
        • 2.Qd4#
      • 1...Qb7
        • 2.Qd4#
      • 1...Qd4
        • 2.Sxf3#
        • 2.Qxd4#
        • 2.exd4#
      • 1...Bb4
        • 2.Sxf3#
      • 1...Bd4
        • 2.exd4#
      • 1...Bb6
        • 2.Sxf3#
      • 1...Bd6
        • 2.Sxf3#
      • 1...Ba7
        • 2.Sxf3#

This is after

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 1
  • Sets
    • Q(g);N_GUARD,P_SPINB(f)::S(D),XP(d)
  • Tries
    • Try
      • Q(C);CHECK
      • Refutation
        • P(e);P_SPINP(e)
  • Actual
    • Q(C);XP(e)
    • Threat
      • QAB1(C)
    • Vars
      • Q(g);CHECK,P_SPINB(f),XQ(C)::S(D),XQ(g)
      • Q(g);N_GUARD,P_SPINB(f),XB(I)::QAB1(C)
      • B(f);N_GUARD,P_PINQ(C),P_PINS(D),P_SPINB(f),P_SPINQ(g),XP(E)::QAB(C)
      • Q(g);N_GUARD,P_SPINB(f)::QAR1(C),XQ(g)
      • Q(g);N_GUARD,P_SPINB(f)::QAB1(C)
      • B(f);P_PINQ(C),P_SPINQ(g)::S(D),XP(d)
      • B(f);OGATE,P_PINQ(C),P_SPINQ(g)::R(B)+P(E)DCHECK,XB(f)
      • B(f);N_SPINR(k),P_PINQ(C),P_SPINQ(g)::S(D),XP(d)
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